CN108386154A - Completion becomes encapsulation tube head - Google Patents

Abstract

The advantages of apparatus of the present invention overall structure combination core axis bushing header and slip type casing head, forms completion and becomes encapsulation tube head, and based on box cupling jacket header structures, it forms the change loads more for complicated completion well heads and the structures such as connects, seals, installing, for the well head that is likely to occur of scene it is complicated it is pre-designed go out multinomial connection, installation prediction scheme, for example, the casing coupling hanger in box cupling jacket tube head is become dress as the stronger sleeve body hanger of versatility；For another example becoming the special-shaped of the present invention is incorporated the advantages of BT sealing techniques in dress wellhead sealing flange, and derive the sealing combination structures such as profile seal part；For another example change dress wellhead sealing flange and the special-shaped dress wellhead sealing flange that becomes are applicable in the change assembling structure such as the standard flange of standard type common in Completion Operations and non-standard double flanges, welded flange and screwed flange.

Description

Completion becomes encapsulation tube head

Technical field

The invention belongs to casing head technical fields, and in particular to completion becomes encapsulation tube head.

Background technology

Casing head product is oil, gas well probing, adopts the well head guaranteed conditions that must be provided in defeated operation, main to meet probing Prevent " blowout " and necessary mating installation wellhead blowout preventor group in operation, and effective well head connection is provided to adopt defeated operation, is Multinomial engineer operation provides safe efficient, easily ground and underground effective mode of communicating.In the development history of casing head product In live through many researchs and innovation, with regard to its product itself structure feature be unable to do without with the connection that enters casing string, however with brill The innovation of well technique content, it is desirable that work(of the defeated operation to wellhead assembly is adopted in the combining form diversification of wellhead assembly, later stage well workover Energy property desired content increases, and also increases the functional requirement of casing head product therewith.Slip-type set is mainly applied in the prior art Tube head and core axis bushing header.Deficiency existing for two kinds of casing heads enters as follows：

(1) slip type casing head is complicated, and manufacturing cost is high, and selling price higher, user, which is typically limited to only, to trap Exploration class well type more than tube layer number uses；

(2) slip type casing head well head installation will could be carried out in the long period in well cementing operation later stage, long between waiting the stopping times, be needed Repeated removal, installation blowout preventer wellhead device, troublesome in poeration, security risk is more；

(3) slip type casing head realizes that the connection with casing is just calculated completion and transferred with Casing-Cutting ontological manner, using note Modeling formula sealing structure is docked with sleeve body, for injection molding type sealing structure, also needs to be equipped with specific purpose tool and technical staff scene Service, content is more, and operation is loaded down with trivial details, and later stage replacement operation is complicated, and the performance of the sealing structure and permanence also hold arguement；

(4) slip type casing head well head configuration only meets flange (unique) form, and the company of needing to change in defeated operation is adopted to the later stage The mode of connecing forms inconvenience；

(5) core axis bushing header controls mandrel hanger status requirement accurate, increases operator to entering casing string Apolegamy difficulty, the especially tripping in position of last root casing, it is necessary to assure outstanding holder can precisely be set in casing head ontology Flange design position, otherwise will appear unusual service condition, and subsequent processing is cumbersome；

(6) increase with orientation well type, horizontal well type, well inner sleeve string weightlessness in cement mortar increases, and causes to hang Device cannot set casing head design position, and drilling well user plane is very intractable to this phenomenon, at casing head manufacturer's on-site maintenance Complex procedures are managed, and rehabilitation cost is higher；

(7) with casing connection there is the excessive pipe nipple of mandrel in the mandrel hanger of core axis bushing header, because mandrel is short Section is different from the material of casing, easy tos produce thread gluing or other damage phenomenons, and the source of damage is called to account mostly because bad discriminating is formed Arguement, dispute, directly affect using and selling for later stage casing head product；

(8) the completion well head of mandrel hanger is also box thread connection type, and the treatment technology for box thread damage occur is non- Often trouble is employed electric, gas welding and is inconvenient, and there are safety and welding quality risk, and can increase well head and basset highly, gives The ground surface works of later stage oil producing operation increase many costs, and Party A is difficult to receive or do not receive completion to transfer；

(9) the completion well head of box thread connection type is also needed when installing production tree or other engineer operation devices Separately match male thread pipe nipple, and oil recovery tree device itself is flange-type connection, somewhat extra, the excessive shape of nipple joint of such conversion At top-heavy form, many destructions are formed to screw thread, especially repeatedly upper, shackle can accelerate thread damage, occur and the (7), (8) article identical consequence.

The present invention is to be improved on the basis of above-mentioned technical problem.

Invention content

The problem to be solved in the present invention is that a kind of new structure of exploitation enriches casing head product category, promote industry technology into Step, two kinds or more forms are further added by the basis of tunica tube head product completion interval of well degree of lip-rounding formula, and novel product more assigns precautionary measures, It more adapts to be connected with drilling well instantly, oil producing operation new process, largely promotes and enhance the function of product.

In order to solve the above technical problems, the technical solution adopted by the present invention is：

Completion becomes encapsulation tube head, including production casing, casing hanger, body flange and protective device；The production set Pipe is fixedly arranged in described sleeve pipe hanger, and described sleeve pipe hanger is set in the body flange, and the protective device is fixed Above the body flange；

Described sleeve pipe hanger includes the offset plate pressing plate from top to bottom set gradually, sealing plate, slip insert gland and hangs Hanging device ontology, the offset plate pressing plate, sealing plate, slip insert gland are passed through by follower bolt and are stretched into hanger body, and by pressing Crab bolt four directions section tightens fixation, then tightens compacting by panel nut and fix, and is installed with below the slip insert pressing plate for embracing The slip insert of the tight production casing；

The hanger body periphery includes from top to bottom cylindrical section connected in sequence, conical section and short cylindrical section；

It is equipped with main passing hole in the body flange, upper smooth section is from top to bottom equipped in the main passing hole, sets taper Section and middle smooth section, which mutually agrees with to be formed with the conical section in above-mentioned hanger body sets.

Further, the sealing plate is cirque structure, and upper surface is convex arc surface.

Further, the hanger body is equipped with several spring mounting holes and spring screw hole up and down, spring spiral shell Nail hole is located at spring mounting hole lower part, is equipped with compressed spring in the spring mounting hole, the compressed spring top with it is described Slip insert gland lower surface abuts, and spring screw, spring screw top and compressed spring bottom are equipped in the spring screw hole End abuts, and is fixed in spring screw hole.

Further, body flange top circumferential direction is equipped with several hanger lock pins, when casing hanger is set in described When in body flange, the hanger lock pin is abutted with the panel nut outer surface.

Further, the slip insert is conical structure, and includes independent three pieces, and one is equipped on every box cupling slip insert It is oriented to fixture block, the slip insert guide groove coordinated with the guiding fixture block, the tooth of the slip insert are correspondingly provided in the slip insert pressing plate Face is abutted with production casing periphery.

Further, if body flange lower part circumferential direction is equipped with dry side circulation port, which is equipped with and is used for Connect the part plan of side flange.

Further, the production casing includes sleeve body and is fixedly arranged on the casing coupling of described sleeve pipe body upper part.

The present invention, which also resides in, discloses a kind of casing coupling hanger, and the slip insert in described sleeve pipe box cupling hanger is box cupling The box cupling facing of slip insert, box cupling slip insert is abutted with casing coupling periphery, the short cylindrical of described sleeve pipe box cupling hanger lower part Duan Huanxiang is equipped with several jackscrews, includes box cupling through-hole and casing suppending hole up and down in the casing coupling hanger, described Casing coupling is fixedly arranged on by the holding effect of box cupling slip insert in the box cupling through-hole, and described sleeve pipe ontology passes through the jackscrew It is locked in described sleeve pipe suppending hole.

Further, the box cupling facing is made of several longitudinal alveolus being arranged circumferentially.

The present invention, which also resides in, discloses a kind of sleeve body hanger, and the slip insert in described sleeve pipe ontology hanger is ontology The ontology facing of slip insert, ontology slip insert is abutted with sleeve body periphery, the short cylindrical of described sleeve pipe ontology hanger lower part Section is equipped with locked mechanism, includes casing suppending hole up and down in the sleeve body hanger, and described sleeve pipe ontology passes through this The holding of body slip insert acts on and the locking of locked mechanism effect is fixedly arranged in described sleeve pipe suppending hole.

Further, the ontology facing is single tooth, circumferential direction, multi-layer shape structure.

Further, locked mechanism is one kind in mandril locked mechanism or connecting rod locked mechanism.

Wherein, the mandril locked mechanism is a crown bar pin, and mandril threaded hole is equipped in described sleeve pipe ontology hanger, should It is equipped with mandril screw in mandril threaded hole, lock pin through-hole, the lock are equipped in the short cylindrical section of described sleeve pipe ontology hanger lower part It sells and is equipped with the crown bar pin in through-hole, the mandril threaded hole is vertical with lock pin through-hole to be communicated, and the end of the crown bar pin is equipped with 45 ° of circles Cone inclined-plane, and keep 90 ° of azimuth axis to be crossed to form with 45 ° of cone inclined-planes of the mandril screw end and contact, adjust Mandril screw generates to bottom offset and then pushes crown bar pin by cone inclined-plane, and end face and the sleeve body of the crown bar pin are supported It connects.

Wherein, the connecting rod locked mechanism is a link pin, and connecting rod through-hole, the company are equipped in described sleeve pipe ontology hanger It is equipped with connecting-rod bolts in rod through-hole, lock pin straight slot, the lockpin ventilating are equipped in the short cylindrical section of described sleeve pipe ontology hanger lower part The link pin is equipped in slot, the connecting rod through-hole is vertical with lock pin straight slot to be communicated, and the top of the connecting-rod bolts is equipped with one and adjusts With rotating nuts, which above can carry or transfer link pin described in the connecting-rod bolts linkage, the company by rotation Bar bolt lower end is rotatablely connected by one end of connecting rod pivot pin and link pin, and the other end of the link pin can by connecting rod pivot pin The relatively described lock pin straight slot is turned to abut with sleeve body.

The present invention, which also resides in, discloses a kind of protective cap, which is one kind in the protective device, the protective cap Including flange protection plate, wellhead protecting plate and hanger protection board；The flange protection plate is doughnut-shaped steel plate, passes through flange bolt It is connect with body flange, the short pipe being connect with wellhead protecting plate is welded in hollow part；Short pipe, which is got on the bus, is formed with cutting belt mark Know slot, which is equipped with the hanger protection board.

Further, it is equipped with hanging ring in the middle part of the wellhead protecting plate.

The present invention, which also resides in, discloses a kind of change dress wellhead sealing flange, which fills wellhead sealing flange as the protective device In one kind, be equipped with cone seals cover in change dress wellhead sealing flange, it is close by cone that changes fills wellhead sealing flange The cooperation of sealing cover and cone seals part is tightly connected with production casing.

Further, the cone seals cover is up-small and down-big cone tube shape structure, and cone seals cover connects with flange through-hole The place of connecing forms flat circular bead surface, and the inner circle conic tube face of cone seals cover contacts sealing with the cone periphery of cone seals part.

Further, top is equipped with cap roof construction on the cone seals part, which supports with flat circular bead surface It connects, lower surface is abutted with the upper surface of the production casing.

The present invention, which also resides in, discloses a kind of special-shaped change dress wellhead sealing flange, and it is described which, which becomes dress wellhead sealing flange, One kind of protective device, which, which becomes on the flange through-hole for filling wellhead sealing flange, is formed with clamping section and profile seal cover, should Circular bead surface is formed between section face, is located in clamping section at the top of the production casing, profile seal part is located at the profile seal cover Interior, the special-shaped dress wellhead sealing flange that becomes is covered by the cooperation of the profile seal cover and the profile seal part with production The seal of tube connects.

Further, the profile seal part includes two irregular seal rings setting up and down, is located at two profile seals The shading ring of interannular and regulation ring positioned at lower part irregular seal ring lower surface, in profile seal cover section be formed with it is special-shaped Become the sealing peep hole of dress wellhead sealing flange excircle face perforation.

Further, irregular seal ring shape is annular shape, is up and down planar end surface, slow pressure is formed on excircle and inner peripheral surface Slot, outer circumference surface are contacted with profile seal cover, and inner peripheral surface is contacted with production casing.

Further, the shading ring is upper and lower planar end surface, and cyclic annular negative pressure trough is formed on the in-between inside and outside periphery of section, The negative pressure aperture through shading ring is symmetrically formed on the ring periphery of negative pressure trough, the negative pressure aperture is mutually passed through with sealing peep hole It is logical.

Further, the regulation ring is rectangle ring-shaped structure, and several adjusting spiral shells are uniformly formed on the circumference of lower face Pit, each adjust is equipped with adjusting screw in threaded hole, in the cap portion of the adjusting screw and the offset plate pressing plate of casing hanger Surface abuts.

Further, the profile seal part further includes righting-oriented set, when production casing with clamping is intersegmental have gap when, should Righting-oriented set is located in the gap, and the righting-oriented set is rectangular ring structure.

It should be noted that the advantages of apparatus of the present invention overall structure combination core axis bushing header and slip type casing head shape At box cupling jacket tube head, and based on box cupling jacket header structures, the company for more becoming dress well head for complicated completion is formed The structures such as connect, seal, installing, the well head being likely to occur for scene it is complicated it is pre-designed go out multinomial connection, installation prediction scheme, for example, Casing coupling hanger in box cupling jacket tube head is become into dress as the stronger sleeve body hanger of versatility；For another example by BT The advantages of sealing technique, incorporates the special-shaped of the present invention and becomes in dress wellhead sealing flange, and derives the seal combinations such as profile seal part Structure；For another example change dress wellhead sealing flange and the special-shaped dress wellhead sealing flange that becomes are applicable to mark common in Completion Operations The standard flange of pseudotype and non-standard double flanges, welded flange and screwed flange etc. become assembling structure.

The casing head that the present invention is installed using every mouth well is platform, and expansion is for involved by adaptation completion later stage multi-mode operation Project content be research topic, with abundant casing head product function, promote casing head properties of product, reduce needed for fixing link Time, it is design content to reduce the superior functions such as labor intensity, security risk, to assign novel product more shared and interchangeability For form, is formed and meet suspension, connect, the dual function type cone seals of the casing coupling and sleeve body of sealing production casing The novel products such as part and profile seal part, further expanded the theory of " completion become dress well head " of casing head product, function, Form, and there is exchange and versatility between product, structure.Apparatus of the present invention disclosure satisfy that and adapt to the multinomial well head complexity at scene Background, and preconditioning technique is provided, it creates completion and becomes dress wellhead platform.

The present invention not only improves applicability, functionality, the versatility of product, has also simplified structure, and manufacturing cost is simultaneously Do not increase, be basic to show the pit shaft that completion well head is formed by production casing female parent material, develops " box cupling jacket tube head ", The case where further directed to occurring or being likely to occur under two kinds of connecting sleeve box cupling, sleeve body forms, " casing coupling is outstanding for formation Series structures, the product such as hanging device ", " sleeve body hanger ", " bobbin seal composite structure ", after above-mentioned each infrastructure product is directed to Phase recovers the oil, well head installation, connection needed for drilling and repairing well operation are formed " completion becomes encapsulation tube head " of the present invention.

The completion of the present invention becomes encapsulation tube head and has the advantages that：

(1) completion well head becomes dress as casing coupling type by mandrel hanger screw-type, changes mandrel suspension type sleeve head The mode of suspension sleeve directly hangs on casing coupling in the main passing hole of casing head, eliminates and makes screw thread by oneself on mandrel hanger (male female) is easy to happen thread gluing, bad button phenomenon, promotes completion well head quality pass rate, and to there is well head damage the reason of can be more Add explicit example for reference, there is the meaning in guidance clearly identification to be benefited with corresponding wellbore construction unit and casing head manufacturer；

(2) dress can be become by casing coupling hanger suspension sleeve box cupling after there is abnormal well head background shape as by casing Ontology hanger suspension sleeve ontology, and sealing, connection relation are formed with sleeve body, ensure that completion well head disclosure satisfy that the later stage The job requirements of DP technology, the smooth handing-over realized to completion well head, improve timeliness, release the complex background in completion and are stranded It is difficult；

(3) becoming dress wellhead sealing flange can need to become according to completion scene dress into BT sealing flanges, standard flange, double methods Any flange arrangement in blue, welded flange and screwed flange etc., and formed and life by cone seals part and profile seal part Produce the sealing function of casing；

(4) in the prior art, preventer and Casing-Cutting ontology are first dismantled in completion practice, be in addition equipped with " BT sealings Flange ", the full set process are cumbersome；Casing head of the present invention can realize the dismounting to landing joint prior to dismounting preventer, further Loose, safe operating environment and convenience are provided for dismounting wellhead blowout preventor etc., production casing or landing joint are cut in reduction Phenomenon is cut, is not required to be equipped with complex cuts facility and the retrofit to Casing-Cutting well head forming degree, saves cost and time.

Description of the drawings

Fig. 1 is that box cupling jacket tube head becomes dress well head schematic diagram in embodiment；

Fig. 2 is 1 structural schematic diagram of casing head body flange installed in Fig. 1；

Fig. 3 is 11 combining structure schematic diagram of casing head hanger lock pin installed in Fig. 1；

Fig. 4 A are 15 component structure diagram of casing head casing coupling hanger installed in Fig. 1, and Fig. 4 B are and pressing plate spiral shell The structural schematic diagram for the box spanner 1533 that bolt is used cooperatively；

Fig. 5 is the hanger body modular construction schematic diagram of embodiment middle sleeve box cupling hanger 15；

Fig. 6 is 1510 component structure diagram of compressed spring in embodiment；

Fig. 7 A are 1512 structural schematic diagram of slip insert gland in embodiment, and Fig. 7 B are that the section of slip insert guide groove 1531 is tied Structure schematic diagram, Fig. 7 C are the side, sectional structural schematic diagram of Fig. 7 A；

Fig. 8 A are 1513 structural schematic diagram of box cupling slip insert of embodiment middle sleeve box cupling hanger 15, and Fig. 8 B are box cupling tooth The structural schematic diagram in face 1528, Fig. 8 C be Fig. 8 A A-A to schematic cross-section；

Fig. 9 is 1514 structural schematic diagram of sealing plate in embodiment；

Figure 10 is 1515 structural schematic diagram of offset plate pressing plate in embodiment；

Figure 11 is 1516 modular construction schematic diagram of embodiment center platen bolt；

Figure 12 is hanger lock pin 11 and 15 package assembly fundamental diagram of casing coupling hanger in embodiment；

Figure 13 is 12 structural schematic diagram of wellhead protecting cap in embodiment；

Figure 14 is 501 structural schematic diagram of surface layer double male joint being connect with box thread section 5 in Fig. 2；

Figure 15 is the mounting structure schematic diagram of embodiment middle sleeve box cupling hanger 15 component and production casing；

Figure 16 is that embodiment middle sleeve box cupling hanger 15 status diagram of abnormal well head background situation occurs；

Figure 17 is that the change of embodiment middle sleeve ontology hanger 1500 fills well head schematic diagram；

Figure 18 is the structural schematic diagram of embodiment middle sleeve ontology hanger 1500；

Figure 19 is the structural schematic diagram of hanger body in embodiment middle sleeve ontology hanger 1500；

Figure 20 A are the structural schematic diagram of the ontology slip insert 1537 of embodiment middle sleeve ontology hanger 1500, and Figure 20 B are The structural schematic diagram of ontology facing 1538 in ontology slip insert 1537；

Figure 21 A are structure, the principle schematic of the mandril locked mechanism of embodiment middle sleeve ontology hanger 1500；

Figure 21 B are structure, the principle schematic of the connecting rod locked mechanism of embodiment middle sleeve ontology hanger 1500, In, connecting rod wrench 1550 is to be matched with the connecting rod locked mechanism；

Figure 22 is the structure that BT sealing flanges are used cooperatively with embodiment middle sleeve ontology hanger 1500 in the prior art Schematic diagram；

Figure 23 is the structural schematic diagram of cone seals part 51 in embodiment；

Figure 24 A, the sealing combination structure schematic diagram that 24B, 24C are cone seals part 51 and production casing in embodiment, In, Figure 24 A are cone seals part 51 and 16 clamping composite structure of casing coupling；Figure 24 B are cone seals part 51 and sleeve body 17 clamping composite structure；Figure 24 C are the matching relationship schematic diagram of cone seals part 51 and change dress wellhead sealing flange 30；

Figure 24 D are that embodiment Plays flange 33 is illustrated by the sealing combination structure of cone seals part 51 and production casing Figure；Figure 24 E are the sealing combination structure schematic diagram that double flanges 37 pass through cone seals part 51 and production casing in embodiment；Figure 24F is the sealing combination structure schematic diagram that welded flange 40 passes through cone seals part 51 and production casing in embodiment；Figure 24 G Pass through the sealing combination structure schematic diagram of cone seals part 51 and production casing for screwed flange in embodiment 42；

Figure 25 is that special-shaped become fills combination of the wellhead sealing flange 55 by profile seal part and casing coupling 16 in embodiment Structural schematic diagram；

Figure 26 is that special-shaped become fills combination of the wellhead sealing flange 55 by profile seal part and sleeve body 17 in embodiment Structural schematic diagram；

Figure 27 is the special-shaped structural schematic diagram for becoming dress wellhead sealing flange 55 in embodiment；

Figure 28 is the structural schematic diagram of irregular seal ring 61 in embodiment；

Figure 29 is the structural schematic diagram of shading ring 64 in embodiment；

Figure 30 is the structural schematic diagram of regulation ring 58 in embodiment；

Figure 31 is that righting-oriented covers 69 structural schematic diagrams in embodiment；

Figure 32 is 70 structural schematic diagram of metallic packing ring in embodiment.

In figure：

1. body flange, smooth section on 2., 3. set tapered section, smooth section in 4., 5. box thread sections, 6. main passing holes, 7. side circulation port, 8. side flanges, 9. side opening bolts, 10. side opening steel ring slots/steel ring, 11. hanger lock pins, 12. protective caps, 13. flange bolt, 14. flange steel ring slots/steel ring, 15. casing coupling hangers, 16. casing couplings, 17. sleeve bodies, 18. Production casing through-hole, 19. studding holes, 20. bolts hole, 21. hanging rings；

1101. lock pin thread segments, 1102. lock pin smooth sections, 1103. lockpin sleeves, 1104. lock pin sealing elements, 1105. lock pins Cubic section, 1106. lockpin sleeve external screw threads, 1107. lockpin sleeve internal threads, 1108. lockpin holes, 1109. lockpin hole internal threads；

301. conical sections, 302. annular grooves, 303. rubber rings, 304. soft metal rings；

401. cylindrical section；

501. surface layer double male joints, 502. pipe nipple male threads, 503. surface layer through-holes；

901. side opening bolts hole；

1201. flange protection plates, 1202. wellhead protecting plates, 1203. hanger protection boards, 1204. casing coupling through-holes, 1205. bolts hole, 1206. cutting belts, 1207. short pipes；

1501. short cylindrical sections, 1502, jackscrew, 1503, jackscrew through-hole, 1504. jackscrew screwed holes, the suspension of 1505. casings Hole, 1506. internal conical surfaces, circular bead surface in 1507., 1508. spring mounting holes, 1509. spring screw holes, 1510. compressed springs, 1511. spring screws, 1512. slip insert glands, 1513. box cupling slip inserts, 1514. sealing plates, 1515. offset plate pressing plates, 1516. follower bolts, 1517. panel nuts, 1518. wire holes, 1519. follower bolt studding holes, 1520. cylinder shoulder sections, 1521. coarse external screw threads, 1522. sealing plate external cylindrical surfaces, 1523. follower bolt through-holes, 1524. box cupling through-holes, 1525. Sealing plate upper surface, 1526. sealing plate lower faces, 1527. are oriented to fixture block, 1528. box cupling facings, 1529. cone arcs Face, 1530. follower bolt holes, 1531. slip insert guide grooves, 1532. drop handle ropes, 1533. impact wrench, 1534. cubic sections, 1535. closely-pitched external screw threads, 1536. soft metals pad；

1500. sleeve body hangers, 1537. ontology slip inserts, 1538. ontology facings, 1539. body through-holes, 1540. Ejector operation hole, 1541a. mandril threaded holes, 1541b. connecting rod through-holes, 1542. mandril screws, 1543. crown bar pins, 1544. connect Bar bolt, 1545. link pins, 1546. pitman shaft pin/hole, 1547a. lock pin through-holes, 1547b. lock pin straight slots, 1548. rubber plugs, 1549. sealing plain cushions, 1550. connecting rod wrenches；

30. becoming dress wellhead sealing flange, 31. cone seals covers, 32. flange through-holes；

33. standard flange, 34. gasket ring slots, 35. flange studdings/hole, 36. protection boards；

37. pair flange, 38. cone approaching faces, 39. ring flanges, 40. welded flanges, 41. welding section faces, 42. screw thread methods Orchid, 43. box cupling thread segments；

44.BT sealing flanges, 45.BT seal chambers, 46.BT seal grooves/circle, 47. injecting holes, 48. injection molding joints, 49. see Examine hole, 50.BT sealing detections pressure gauge connection/plug；

51. cone seals part, 52. cone peripheries, 53. suit box cupling through-holes, 54. cap tops；

55. abnormal shape becomes dress wellhead sealing flange, 56. sealing peep holes, 57. profile seal covers, 58. regulation rings, 59. clampings Section, 60. profile seal cover bodies, 61. irregular seal rings, 62. slow indents, 63. profile seal through-holes, 64. shading rings, 65. negative pressure Slot, 66. negative pressure apertures, 67. adjust threaded hole, 68. adjusting screws, 69. righting-oriented sets, 70. metallic packing rings, 71. fronts Slot, 72. planar end surfaces are deformed, 73. sides deform slot, 74. profile seals detection pressure gauge connection/plug.

Specific implementation mode

It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.

In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair The limitation of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple " It is meant that two or more.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition Concrete meaning in the present invention.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

In some embodiments, body flange is as shown in Figure 1 and Figure 2, and 1 middle part of body flange is equipped with main passing hole 6, is used for Drillng operation passage drilling tool, tool, the elements such as completion practice tripping in production casing 17, suspension sleeve box cupling hanger 15；Ontology 1 stage casing of flange is equipped with (3 or 4) lockpin hole 1108 that is radial and being connected to main passing hole 6；Lockpin hole 1108 and body flange 1 Outer circumference surface, which is connected one section, produces lockpin hole internal thread 1109,1108 center line of each lockpin hole 120 ° or 90 ° of central angles each other, And vertical and excessively main 6 center line of passing hole；11 assembling mechanism of installation hanger lock pin, is used for fixed sleeving in lockpin hole 1108 Box cupling hanger 15, realizing, which prevents casing from moving back, releases；Main passing hole 6 be formed with from top to bottom smooth section 2, set tapered section 3, in Smooth section 4, box thread section 5；Upper smooth section 2, set tapered section 3 respectively with the cylindrical section of hanger body 401, conical section 301 Corresponding position connects；Lower part box thread section 5 coordinates with pipe nipple male thread 501, forms thread seal.

The side circulation port that 2 radial symmetrics are distributed and run through 1 lower part of body flange is formed in main passing hole 6 in smooth section 4 7, for realizing the multi-mode operation of annular space；There is part plan in the outside of side circulation port 7, uniformly distributed (6 on the excircle of the plane It is a) studding hole 19, it can be connect with the equal subsidiary components of side flange 8.

As shown in Fig. 2, 1 upper surface of body flange is formed with " annular " flange steel ring slot/steel ring 14, it is mating other for sealing Wellhead equipment (predominantly preventer), be evenly equipped on 14 excircle of steel ring slot through body flange 1 and with 6 center of main passing hole The parallel multiple bolts hole 20 of line, for fastening other mating wellhead equipments.

In some embodiments, the assembly structure diagram of hanger lock pin is as shown in Figure 3；The hanger lock pin 11 includes Lock pin, lockpin sleeve 1103 and lock pin sealing element 1104 positioned at lock pin periphery, which includes connected in sequence Lock pin four directions section 1105, lock pin thread segment 1101 and lock pin smooth section 1102, the lockpin sleeve pass through lock pin internal thread and lock pin Thread segment is threadedly coupled, and lock pin smooth section 1102 is contacted with lockpin hole 1108 and 1104 inner peripheral surface of lock pin sealing element, and lock pin is close 1104 outer circumference surface of sealing is contacted with lockpin hole 1108,1109 segment section face of lockpin hole internal thread；Lock pin thread segment 1101 It is contacted with lockpin sleeve internal thread 1107, realizes threaded adjusting and locking；Lockpin sleeve external screw thread 1106 and lockpin hole internal thread 1109 Contact forms extruding of the lockpin sleeve external screw thread 1106 to lock pin sealing element 1104 by rotating lockpin sleeve 1103, realizes lockpin hole 1108 seal with the annular space of lock pin smooth section 1102；The position lock between lockpin sleeve 1103 and body flange 1 is realized simultaneously It is fixed, further the position between lock pin thread segment 1101 and lockpin sleeve internal thread 1107 is formed by rotating lock pin four directions section 1105 It moves, realizes that main passing hole 6 is inserted into 1102 front end of lock pin smooth section.

In some embodiments, casing coupling hanger assembly structure diagram is as shown in Fig. 4 A, Fig. 4 B.In figure, casing Box cupling hanger 15 includes hanger body, jackscrew 1502, compressed spring 1510, spring screw 1511, slip insert gland 1512, box cupling slip insert 1513, sealing plate 1514, offset plate pressing plate 1515, follower bolt 1516, panel nut 1517, drop handle Rope 1532, impact wrench 1533；Wherein, 1533 top of box spanner is equipped with the recessed of the cubic section 1534 of clamping follower bolt 1516 Slot, lower part are equipped with the groove of clamping panel nut 1517.(1532,1533, which belong to product, is equipped with subsidiary component).

In some embodiments, the structural schematic diagram of hanger body is as shown in Figure 5；Wherein, hanger body excircle Face is formed with cylindrical section 401, conical section 301, short cylindrical section 1501 from top to bottom；It is formed with soft metal ring 304 in the conical section 301 (can not also set) and annular groove 302 have rubber ring 303 in slot, for set tapered section 3 in body flange 1 and form " tapered plug Formula " presses gluing, sealing；Hanger body middle section is formed with internal conical surface 1506, interior circular bead surface 1507 and casing from top to bottom Suppending hole 1505；Internal conical surface 1506 is contacted with slip insert cone cambered surface 1529, realizes that " cone face slides and wedge-shaped undergauge is embraced Card " principle and function；Soft metal pad 1536 is installed, for real with the flat circular bead surface in 16 lower end of casing coupling on interior circular bead surface 1507 Steel sealing after existing crimp；1501 stage casing of short cylindrical section be formed with 3 sets each other the jackscrew through-hole 1503 of 120 ° of central angles and 1502 retaining mechanism of jackscrew, jackscrew 1502 and jackscrew screwed hole 1504 keep screw-thread fit and through casing suppending holes 1505 Interior, the central axis of jackscrew through-hole 1503 and 1505 holes of casing suppending hole simultaneously has intersection point, and jackscrew front end is plane, and rear end is Interior hexagonal structure can promote 1502 displacement of jackscrew by hexagonal end in rotation, realize and be locked with the position of sleeve body 17.

In some embodiments, the assembly structure diagram of hanger body installation compressed spring is as shown in Figure 6, wherein Hanger body upper surface is provided circumferentially about have 3 each other 120 ° of central angles and with the bullet of 1505 centerline parallel of casing suppending hole Spring mounting hole 1508 and spring screw hole 1509, spring screw hole 1509 is below spring mounting hole 1508, each spring installation Compressed spring 1510 is installed in hole 1508, spring screw 1511 is installed in each spring screw hole, spring screw 1511 with It 1510 end thereof contacts of compressed spring and is fixed in spring mounting hole 1508, spring screw 1511 and compressed spring 1510, bullet Spring screw hole 1509 keeps relative stability, and 1510 other end of compressed spring is higher than 15 upper surface of casing coupling hanger, keeps certainly By 1512 lower face of contact slip insert gland, realize floating supporting role, further to 1513 righting of box cupling slip insert of suspension, It floats, support；The pressure of (6 or 8) 60 ° or 45 ° central angles each other is additionally provided on 15 upper surface circumference of casing coupling hanger Crab bolt studding hole 1519, for installing follower bolt 1516, spring mounting hole 1508 is arranged in follower bolt studding hole 1519 For adjacent holes away between, follower bolt studding hole 1519 does not constitute intersection point with spring mounting hole 1508, can take central angle or distribution Equivalent means do not avoid having intersection point in same position to circle.

In some embodiments, the structural schematic diagram of slip insert gland is as shown in Fig. 7 A, Fig. 7 B, Fig. 7 C；Wherein, slip insert Gland 1512 is circular ring shape, and the follower bolt hole 1530 of (6 or 8) 60 ° or 45 ° central angles each other is formed on ring body circumference, is used In through follower bolt 1516；Centre is formed with box cupling through-hole 1524, for through casing coupling 16, sleeve body 17；Upper surface For plane, lower face is formed with " dovetail " (wide at the top and narrow at the bottom) slip insert guide groove 1531 of 3 120 ° of central angles each other, and slip insert is led 1512 ring body of slip insert gland is penetrated through to slot 1531, central axis and passes through 1524 center line of box cupling through-hole.

In some embodiments, the structural schematic diagram of box cupling slip insert is as shown in Fig. 8 A, Fig. 8 B, Fig. 8 C；Wherein, box cupling card Watt tooth 1513 is that cone cuts into 1/3 arc structure, and upper end is formed with " dovetail " guiding fixture block 1527 (wide at the top and narrow at the bottom) and " swallow Tail " slip insert guide groove 1531 coordinates, and realizes guiding, righting, suspension connection, outer circle is cone cambered surface 1529, and inner circle is box cupling Facing 1528, box cupling slip insert 1513 are hung on respectively on three " dovetail " slip insert guide grooves 1531, form cylindric box cupling Through-hole 1524, for running through casing coupling 16；Box cupling facing 1528 is contacted with casing coupling 16 and holding card；In mating series connection The middle mutual support realized between box cupling slip insert 1513 and slip insert gland 1512, follower bolt 1516, hanger body is simultaneously Fixed, the further fixation realized between casing coupling 16 and casing head body flange 1, anti-retaining releases rotation；

Above-mentioned box cupling slip insert 1513 has replaceability, can be replaced and fits therewith for casing coupling 16 or sleeve body 17 The slip insert piece answered.

In some embodiments, sealing plate structural schematic diagram is as shown in figure 9, preferred embodiment as the present embodiment, close Glue sealing board 1514 is circular ring shape, and the follower bolt through-hole 1523 of (6 or 8) 60 ° or 45 ° central angles each other is formed in ring body, with 1519 position of follower bolt studding hole corresponds to, for running through follower bolt 1516；Sealing plate 1514 has certain thickness, center system There is box cupling through-hole 1524, contacted with casing coupling 16, lower face 1526 is plane, and upper surface 1525 is designed as convex circular arc Face；The advantages of design is：There is the process prior to edge deformation, expansion at position among when glue part is squeezed, for entirety The extension of glue part can form different distributions on material internal structure, and intermediate position glue part contact area is big, bears to press Power is big, and storage glue amount is more, deformation is more, and arc surface 1525 first contacts offset plate pressing plate 1515 and bears pressure, is formed prior to edge It realizes sealing, and squeezes whole colloid to edge swell, edge glue part body bears pressure hysteresis, less than normal, and deformation is few, can be more Original speciality of glue part material is kept well；Discovery and utilization to this deformation characteristic are based on to the present embodiment structure and material Research, to entire glue part deformation process and generate a kind of distillation of the sealing principle for filling inside and outside edge and gap；Essence On be deformation and the pressure-bearing characteristic that deformable material (glue part body) is utilized, sealing plate 1514 is created and can more preferably sealed Offset plate external cylindrical surface 1522, box cupling through-hole 1524 all contact surfaces in have the deformation rates in more filling gaps, improve glue The force environment of part body enhances sealing resistance to compression ability to bear and the service life of glue part body；Reduce glue part from structure becoming The Mo Chali formed with whole contact plane during shape, edge glue part are not subject to pressure, can more preferably realize to main latus rectum in advance Sealing is encircled between hole 6 and casing coupling 16, further forms entirety " cone plug type " pressure holding patch with casing coupling hanger 15 Close sealing；It is therein deformation, filling principle same sealing effect is all had to all bolt holes.

In some embodiments, the structural schematic diagram of offset plate pressing plate is as shown in Figure 10；Offset plate pressing plate 1515 and sealing plate 1514 structures are almost the same, and difference lies in offset plate pressing plates 1515 to be made of steel plate, and upper and lower end face is plane, and sealing plate Upper surface 1525 is arc surface；The pressing force that panel nut 1517 generates is uniformly distributed planar by offset plate pressing plate 1515, right Whole glue part realizes that binding face is compressed and squeezed to circumferential expansion, fills clearance seal.

In some embodiments, the structural schematic diagram of follower bolt is as shown in figure 11；1516 one end of follower bolt is closely-pitched External screw thread 1535 coordinates with the follower bolt studding hole 1519 of casing coupling hanger 15；Interlude is equipped with cylinder shoulder section 1520,1520 outer diameter of cylinder shoulder section is more than the diameter of closely-pitched external screw thread 1535 and follower bolt hole 1530, forms flat circular bead surface, For compressing slip insert gland 1512；The other end is coarse external screw thread 1521, is coordinated with standard component panel nut 1517, for pressing Tight offset plate pressing plate 1515, sealing plate 1514, form sealing；1521 top of coarse external screw thread is formed with cubic section 1534, for revolving Turn follower bolt 1516, crowded knot is held under the arm by 1535 threaded engagement of closely-pitched external screw thread and the formation of 1520 flat circular bead surface of cylinder shoulder section Structure generates clamping force, realizes that the box cupling slip insert 1513 to slip insert gland 1512, suspension holds tight extruding under the arm, is formed and " slided in cone face Shifting and wedge-shaped undergauge holding card " principle and function；1534 symmetrical plane of cubic section is formed with wire hole 1518, and it is anti-to wear silk for each bolt It moves back and releases and install drop handle rope 1532.

In some embodiments, the deformation expansion process of sealing plate 1514, the closely-pitched of (6 or 8) follower bolt 1516 External screw thread 1535 coordinates with pressing plate studding hole 1519, the intermediate 1520 tight slip insert gland of platform shoulder face pressure of cylinder shoulder section Plane on 1512 forms fastening, compresses connection；On this basis, by 1516 cylinder shoulder section 1520 of each follower bolt through Sealing plate 1514, offset plate pressing plate 1515 follower bolt through-hole 1523 in, be kept in contact, erection sequence is sealing plate 1514, offset plate pressing plate 1515, panel nut 1517；Panel nut 1517 and the coarse external screw thread 1521 of follower bolt 1516 are matched It closes, compresses to be formed by screw thread and hold crowded structure under the arm, 1515 crush seal offset plate 1514 of offset plate pressing plate forms above-mentioned sealed environment And pressure holding sealing effect.

Completion installs well head and needs first firmly to tighten follower bolt 1516 in 1512 upper surface of slip insert gland, realizes circle 1520 platform shoulder of pylon shoulder section faces the compression of slip insert gland 1512, and the further slip insert gland 1512 that transmits is to box cupling The extruding of slip insert 1513, further by 1513 cone cambered surface 1529 of box cupling slip insert and casing coupling hanger 15 " cone face slides and wedge-shaped undergauge holding card " principle and function are realized in conical section face 1506, are further realized to casing coupling 16 It is fixed, to confirm that appear height, bearing tension force of 1512 stress equalization of slip insert gland, straight, each follower bolt 1516 is consistent；It Afterwards, during sealing plate is installed, other sealing materials (oil, fat, cream etc.) with sealing characteristics can be filled；When each portion When part installation correctly has no Non-Compliance, you can applied energetically in panel nut 1517, further to glue with impact wrench 1533 Plate pressing plate 1515, sealing plate 1514 realize that high pressure strength squeezes and glue part dilatancy occurs, and further realize main latus rectum Face sealing is encircled between hole 6 and casing coupling 16, is formed on conical section face 301 with casing coupling hanger 15 and connector Entirety " cone plug type " press gluing, sealing.

In some embodiments, hanger lock pin and casing coupling hanger package assembly fundamental diagram such as Figure 12 institutes Show, the integral cannula box cupling hanger 15 formed by the series winding of follower bolt 1516 is first set in sleeve body 17 and part tubular On 16 tube body of box cupling, through landing joint or it is connected to parameter (landing joint is the similar molded cannula of suitable length for being connected to 16 top of casing coupling) Casing coupling 16 is sent into in the main passing hole of 15 sleeve pipe of casing coupling hanger 6, realizes and set tapered section 3 " cone plug type " presses gluing, sealing.Gearing casing coupling 16, which moves back, when to prevent from unloading landing joint releases, and needs fixed sleeving box cupling outstanding Hanging device 15 promotes lock pin smooth by rotating the relative displacement between 1105 generation matching thread 1101 and 1107 of lock pin four directions section Section 1102 stretches out lockpin holes 1108, and it is 6 sections long to be inserted into main passing hole, with the cubic section 1534 of follower bolt 1516 or panel nut 1517 form the folded fork of " cross " dislocation, are rotated by 11 limiting boot box cupling hanger 15 of hanger lock pin, further to limit Relative shift between sleeve body 17 and surface pipe realizes that anti-back is released；When chance hanger lock pin 11 cannot be rotated in place, Illustrate that 1102 front end of lock pin smooth section forms intersection point with follower bolt 1516, belong to " dieback " state, this phenomenon is only possible to outstanding One of hanging device lock pin 11 encounters, and the distribution that other hanger lock pins 11 have been made in structure with central angle is set Meter.

In some embodiments, the structural schematic diagram of protective cap is as shown in figure 13, which is similar to " straw hat ", including Hanging ring 21, flange protection plate 1201, wellhead protecting plate 1202, hanger protection board 1203, casing coupling through-hole 1204, bolt hole 1205, cutting belt 1206；Hanging ring is the focus point of casing head product, sling point；Flange protection plate 1201 is doughnut-shaped steel plate, circumference It is evenly equipped with (4 or more) flange bolt hole 1205, for being connect with body flange 1, short pipe 1207 is welded in hollow part；It is short Pipe 1207, which is got on the bus, is formed with 1206 logo slot of cutting belt, and opening well head for the later stage indicates cutting position, 1207 top of short pipe Wellhead protecting plate 1202 is welded, 1206 hypomere suitable location of inner wall cutting belt is welded hanger protection board 1203, realizes to casing The protection of 15 all components of box cupling hanger, 1203 center of hanger protection board are formed with casing coupling through-hole 1204, are used for Interspersed casing coupling 16；Flange bolt 13 is realized through bolt hole 1205, bolt hole 20 by protective cap 12 and substance law when completion Simultaneously 1 plane of protective case tube head body flange, steel ring slot 14, casing coupling hanger 15, casing coupling 16 are formed 1 connection of orchid Whole well head.

Though the body of protective cap, function are not emphasis, the design as the present embodiment is preferred, and advantage is：It can be to even The flange bolt 13 connect implements completion riveting, solid welding, and preventing field can not at will dismantle under supervision state and well head meaning occurs Outer and broken ring phenomenon；It is long that dozen steel letters print, welding printed words, the mode of dress patch Sign Board can be used for the information that completion must be retained Kubo stays in protective cap outwardly and inwardly, and elimination scene is got angry and important element not related to body flange 1 and pit shaft directly produces The phenomenon that raw soldering, keeps the original material characteristic of wellhead component；For the later stage use external screw thread connect with casing coupling 16 its Its operation form, being positively retained at not remove only to implement to cut to 1206 top of cutting belt under 12 background of protective cap just can open well Mouthful, it is obstructed by hanger protection board 1203, cutting waste residue, splash is avoided to lose the destruction caused to elements such as glue parts, it is right Casing coupling hanger 15 is whole to realize protection；Middle cone face high, surrounding is low is made in hanger protection board 1203, is conducive to barrier Rainwater and corrosive fluid penetrate into, and are more favorable for protection hanger sealing performance and extend each component life.

In some embodiments, the surface layer double male joint structural schematic diagram such as Figure 14 institutes being connect with box thread section 5 in Fig. 2 Show；Such as Fig. 1,2,15,6 lower part of main through-hole is box thread section 5, and in drillng operation, it is mostly surface pipe box cupling mother's spiral shell that pit shaft, which is retained, Line mode must be connected between the two by surface layer double male joint 501；Double male joint 501 both ends in surface layer are pipe nipple male thread 502, Centre has surface layer through-hole 503, pipe nipple male thread 502 to be connect respectively with box thread section 5 and well head surface layer casing coupling box thread, It realizes that body flange 1 is connected to the sealing of surface pipe, forms the insertion channel of circulation of drilling fluid and drilling tool, sleeve body 17； 501 other functions of surface layer double male joint：The variation of different surface pipes and box thread is can adapt to, realizes the phase in variation system It connects and seals, without changing 1 box thread section of body flange, 5 structure；Further function is that pit shaft surface pipe connects It binds round box thread damage or the state of box thread does not occur, surface layer double male joint can arbitrarily produce suitable length, meet body, with full The interconnection of foot and realization and pit shaft, retaining sleeve head body flange 1 are not influenced by welding surroundings and quality.

In some embodiments, casing coupling hanger and casing coupling, sleeve body mounting structure schematic diagram such as Figure 15 It is shown；By in 15 component of suit casing coupling hanger box cupling suppending hole 1524, casing suppending hole 1505 is through sleeve body 17 Male thread end cap is filled to 16 end of casing coupling, and suit mode is versatile and flexible based on sliding；Peace of the present embodiment equipped with adaptation Drop handle rope 1532 is filled, can also complete to be set with by external source condition, hung in confirmation 16 flat circular bead surface of casing coupling and casing coupling The soft metal pad 1536 of device 15 completely attaches to, without shaking, you can forces in jackscrew 1502 with allen wrench, realizes and casing sheet The position of body 17 locks, especially in upper 15 operation of casing coupling hanger for carrying production casing 17 and gearing, it is necessary to confirm top Whether silk 1502 locks with sleeve body 17, avoids occurring casing coupling hanger 15 and is damaged from eminence downslide or accident. It connect and rearward can slowly transfer casing coupling hanger 15 from eminence with pit shaft inner sleeve box cupling 16 in confirmation production casing 17 To the operable position of rig floor two-dimensional person, with spanner is symmetrical, equal power rotates the cubic section 1534 of each follower bolt 1516, casing is completed The installation of box cupling hanger 15.

Box cupling jacket tube head in above-described embodiment is to be designed under nominal situation, i.e., production casing can be transferred to predetermined Well depth includes that box cupling through-hole and casing suppending hole, casing up and down connects in the casing coupling hanger under the nominal situation Hoop is fixedly arranged in the box cupling through-hole, and sleeve body is fixedly arranged in described sleeve pipe suppending hole.But in Completion Operations, when understanding It is commonly encountered damage, i.e., the case where production casing cannot transfer to predetermined well depth (as shown in figure 16), in particular with water Horizontal well gradually increases, and the case where damage occur also happens occasionally.

Under the damage, it is necessary first to the hang of sleeve body 17 and casing coupling hanger 15 is solved, it It needs the position solved between body flange 1 to fix afterwards, finally needs to solve and set between taper face 3, main passing hole 6 Annular space sealing relationship.

For the damage, following embodiment becomes assembling structure according to the completion that each well head Foreground selection adapts to.

In some embodiments, the change dress Suspension Technique and structure of a kind of suspension sleeve ontology 17 are provided, it is specially a kind of Sleeve body hanger and its corresponding ontology jacket tube head are opened up mainly around 15 suspension sleeve ontology 17 of casing coupling hanger New invention is started, solves the problems, such as Figure 16 background shape well heads, ensures that completion well head disclosure satisfy that the job requirements of later stage DP technology, The smooth handing-over realized to completion well head, improves timeliness, releases complex background and difficulty in completion.

In some embodiments, a kind of sleeve body hanger being applicable in ontology jacket tube head is as shown in figure 17, the casing Ontology hanger 1500, with above-mentioned casing coupling hanger 15 the difference is that, including ontology slip insert 1537, ontology tooth Face 1538, body through-holes 1539, mandril locked mechanism, connecting rod locked mechanism.

In simple terms, when casing coupling hanger 15 meets the well head background shape of Figure 16 forms, intractability increases, and has When some can be taken to have damage or destroy well head form remedy.Therefore, for the well head background shape and capable of realizing few destruction Or the hope of effective well head is not destroyed and is formed, on the architecture basics of casing ' box cupling ' hanger, and develop with shared With casing ' ontology ' hanger for exchanging meaning；The installation process of casing coupling hanger with reference to described in above-described embodiment, Box cupling slip insert 1513 in 15 component of casing coupling hanger is replaced with into ontology slip insert 1537, further apolegamy with 17 suitable sealing plate 1514 of sleeve body, offset plate pressing plate 1515, and original structure installation rule is followed, keep other main bodys Component shares characteristic, just can realize on 17 any tube body section of sleeve body clamping, suspension, installation dexterity therein because People and it is different.

Specifically, such as Figure 18, Figure 19,3 are had additional on the hanger body upper surface circumference of sleeve body hanger mutually For 120 ° of central angles and with the ejector operation hole 1540 of 1505 centerline parallel of casing suppending hole, mandril threaded hole 1541a/ connecting rods Through-hole 1541b is equipped with 1542/ connecting-rod bolts 1544 of mandril screw in hole；The hanger body outer circle of sleeve body hanger All 1501 stage casings of lower end short cylindrical section are formed with 3 120 ° of central angles and vertical and intersection mandril threaded hole 1541a/ connecting rods each other Lock pin through-hole 1547a/ the lock pin straight slot 1547b, lock pin through-hole 1547a/ of 1505 center line of through-hole 1541b and casing suppending hole The 1543/ connecting rod lock pin 1545 of crown bar pin of locking sleeve body 17 is installed in lock pin straight slot 1547b.

Sleeve body hanger i.e. in the present embodiment uses 1543/ link lock of crown bar pin when being fixed with sleeve body The advantages of structure of pin 1545 rather than 1502 structure of jackscrew in casing coupling hanger, the design, is as follows：When chance Figure 16 forms Well head background shape can be realized and the solution on 17 arbitrary tube body section of sleeve body in 1500 upper surface of sleeve body hanger Lock/locking operation, relieve 1502 locked mechanism of jackscrew in casing coupling hanger 15 under special status difficult operation it is tired Difficulty can save well head from damage, production casing is not subjected to the damage of external force form, destroys.The other structures of sleeve body hanger 1500, Component is equal with casing coupling hanger 15, is shared.

In some embodiments, the ontology slip insert in sleeve body hanger is as shown in Figure 20 A, Figure 20 B；Such as Figure 16, What is assembled in casing ' box cupling ' hanger 15 is box cupling slip insert 1513, which is to be realized with box cupling outer surface Holding acts on, and the alveolus of facing is longitudinal design, which can not realize suspension and clamping to sleeve body 17, meet After Figure 16 well head background shapes, it is necessary to casing coupling slip insert 1513 be replaced with sleeve body slip insert 1537, the sleeve body The alveolus of 1537 facing of slip insert is lateral hierarchic design, and holding effect is realized with smooth sleeve body 17 with better；

The sleeve body slip insert 1537 is remained unchanged with 1513 general configuration of box cupling slip insert, and changing content has：Box cupling The variation of through-hole 1524 is the sleeve body through-hole 1539 adaptable with sleeve body 17, casing suppending hole 1505；Box cupling facing 1528 variations are ontology facing 1538, and alveolus is distributed as single tooth, circumferential direction, multi-layer shape form.The major function of the facing is Vertical axial gravity that is fixed and bearing suspension sleeve ontology 17, to the well head production casing under the background shape using intuitive Cutting technique shapes, anti-down, anti-back release function realization it is also relatively intuitive.Alveolus distribution, thread form, material choosing in the present embodiment It is the actual parameter obtained by multiple Theoretical Design and experiment, field application and application structure to select with determinations, and with reality Erection skill combination can perform to effect ultimate attainment.

In addition, also needing to replace to the sealing plate 1514 of upper part, offset plate pressing plate 1515, ensure and the formation of sleeve body 17 The effective sealing encircled sealing effect, realize with 6 annular space of main passing hole in tube body section face.

In some embodiments, the knot in sleeve body hanger for the mandril locked mechanism of fixed sleeving ontology 17 Structure, principle schematic are as illustrated in fig. 21；Wherein, crown bar pin 1543, crown bar pin 1543 and set are installed in lock pin through-hole 1547a The contact jaw outer diameter of tube body 17 is slightly smaller than the other end, and is planar end surface structure, for lock sleeve body 17 when have contact, outside Slightly smaller one section of diameter is mounted in the hole section of lock pin through-hole 1547a relative small diameters, and formation can only be outside sleeve body hanger It is unidirectionally inserted into the hole in 1501 direction of circumference short cylindrical section, further limits the stroke of crown bar pin 1543 and slide and lose now As；1543 other end of crown bar pin has straight cylindrical section face, and there are 45 ° of cone inclined-planes, the inclined-plane in the end in this is straight cylindrical section face It keeps 90 ° of azimuth axis to intersect with 45 ° of cone inclined-planes of 1542 end of mandril screw, forms contact, pass through allen wrench It adjusts mandril screw 1542 and generates displacement, can realize to form the cone inclined-plane of contact and push sliding, it is further to realize To propulsion, displacement of the crown bar pin 1543 on 1505 direction of casing suppending hole, realizes and contact locking with sleeve body 17.

The advantages of design is：It can be under Figure 16 well head background shapes from 1500 upper surface of sleeve body hanger, well head Unlock/locking is operated in positive direction, guarantee allows the conical section face 301 on 1500 outer circumference surface of sleeve body hanger can be with master The taper face 3 that sets on passing hole 6 forms entirety " cone plug type " pressure holding gluing, sealing effect.Mandril screw 1542 and mandril screw thread Hole 1541a is connected by standard thread, is formed and is adjusted, locks, sealing effect, in mandril screw 1542 and mandril threaded hole Sealing plain cushion 1549 is also devised between the compression circular bead surface of 1541a planar end surfaces contact, while realizing adjusting, locking function, Also the pressure holding sealing effect to sealing plain cushion 1549 can be formed；1542 other end of mandril screw has interior hexagonal body, with interior six side Spanner is inserted into rotation and adjusting can be realized；It is also devised with the rubber plug 1548 of sealing in ejector operation hole 1540, confirms casing Ontology hanger 1500 can be put into rubber plug 1548 after locking with sleeve body 17, form blind plugging.

In some embodiments, the knot in sleeve body hanger for the connecting rod locked mechanism of fixed sleeving ontology 17 Structure, principle schematic are as illustrated in fig. 21b；Wherein, link pin 1545, link pin 1545 and set are installed in lock pin straight slot 1547b 17 contact jaw of tube body has the cam-like arc surface that can be rotated around connecting rod pivot pin 1546, with the undergauge lock on single direction of rotation Gu function, the other end connects into crank connecting link wabbler mechanism with connecting-rod bolts 1544 by connecting rod pivot pin 1546, because of link pin Gap between 1545 cam surfaces and sleeve body 17 is smaller, and the radian of cam surface rotation is also smaller so that active strokes are smaller.

Connecting-rod bolts 1544 connect into ' connecting rod ' locked mechanism with link pin 1545 by connecting rod pivot pin 1546；It installed The connecting-rod bolts 1544 of ' connecting rod ' locked mechanism are inserted into along connecting rod through-hole 1541b in ejector operation hole 1540, by connecting rod by journey Pivot pin 1546 is fixed in the connecting rod axis hole 1546 of lock pin straight slot 1547b, that is, being formed can be operated by connecting-rod bolts 1544, be adjusted ' connecting rod ' locked mechanism that link pin 1545 is swung is saved, the further cam arc surface that formed imitates the locking of sleeve body 17 It answers；There is sealing plain cushion 1549 on 1544 planar end surface of connecting-rod bolts, connecting-rod bolts 1544 are by the connecting rod wrench 1550 being equipped with Rotating nuts above carry link pin 1545, meanwhile, sealing plain cushion 1549 is compressed, is formed and is pressed with 1540 bottom face of ejector operation hole Sealing effect, is also devised with the rubber plug 1548 of sealing in ejector operation hole 1540, confirm sleeve body hanger 1500 with Sleeve body 17 can be put into rubber plug 1548 after locking, form blind plugging.

The above-mentioned embodiment about sleeve body hanger, which surrounds, keeps the intrinsic material of pit shaft production casing and connection performance, It is topic for the difficult point for occurring in completion practice or being likely to occur for the purpose of suspension sleeve box cupling 16 and sleeve body 17, with Based on hanging production casing ' box cupling ', the mechanism of further research and development suspension production casing ' ontology ' expands the work(of original product Energy, effect enhance the shared characteristic of original product main structural component, are interior to replace a little part to generate new functional characteristic Hold, the operability that the further science, reasonability and this process for expanding product Zhong Ge mechanisms is realized.It develops ' ontology suspension clamping ' structure, ' mandril ', ' connecting rod ' locked mechanism, and being somebody's turn to do ' mandril ' locked mechanism and ' connecting rod ' locked mechanism can It chooses any one kind of them or combines, unrestricted and influence has dissolved the operation difficulties in former ' jackscrew ' locked mechanism, dissolved Figure 16 wells The intractability of mouth background shape forms completion and becomes dress well head ' this build ' casing head product.

In above-described embodiment, solve nominal situation and improper work with casing coupling hanger and sleeve body hanger For production casing under condition with respect to the hang problem of well head, next need to solve is production casing and change dress wellhead sealing Sealing problem between flange.

In the prior art, common change fills wellhead sealing flange as BT sealing flanges, which is external introduce Technology, as shown in Figure 22.44 one end of BT sealing flanges is formed with the structure that can be connect with casing head body flange 1, passes through method Blue bolt 13, flange steel ring slot/steel ring 14 are realized connection, are compressed, sealing；The other end can connect with standard wellhead oil tree equipment It connects；Middle part is formed with flange through-hole 32, and BT seal closures 45 are formed in through-hole, twice BT seal grooves 46 is formed in cover, to install BT Sealing ring 46, each seal groove middle part are formed with through change dress wellhead sealing flange body, until two on outer circumference surface are straight Symmetrical injecting hole 47 on radial line is equipped with injection molding joint 48 on injecting hole 47, is used after being connect with high-pressure injection moulding rifle by hose To 46 inner cavity pressure injection stop-leak compound of BT sealing rings, to form high pressure chest, squeezes BT sealing rings 46 and expand, pass through twice BT sealing rings 46 The sealing structure being isolated with 17 internal and external channel of sleeve body is formed, realization encircles sealing with sleeve body 17；Twice BT sealings It encloses and is formed on 46 middle section positions through standard flange ontology, until in radius the peep hole 49 on outer circumference surface, And be distributed with 47 axis shape of injecting hole central angle in 90 °, 49 outer end of peep hole is formed with BT sealing detections pressure gauge connection/stifled First 50, the inspection to 46 sealing effect of twice BT sealing rings can be realized by peep hole 49.

BT sealing structures in existing casing head product using more, between which forms relative to connection main body Gap is small, has good bearing strength, material stress is good, and the pressure value that can be sealed as needed is selected to BT sealing rings The different pressure of interior injection, to reach the pressure balance inside and outside in BT sealing rings, according to can also be injected in being renewed after actual conditions Pressure, but the BT sealing techniques, structure form connection relation just for sleeve body 17, have for BT sealing flanges 44 and correspond to Structure size is installed restricted, fine, harsh to the forming degree requirement of connector, and installation exercise is cumbersome, is equipped with auxiliary tool More, manufacture difficulty is big, and product price is higher, and cost performance is not strong, without general interchangeability；

Following embodiment explores the completion that a kind of cone seals cover and cone seals part are used cooperatively and becomes dress shaft collar, it Predicable form sealing and connection aiming at casing coupling 16 or sleeve body 17, wherein multinomial change fills shaft collar Product is again basic object with casing coupling 16, forms the product can be general and exchanged, i.e. identical product had both met casing and connect Hoop 16 adapts to sleeve body 17 again, to reduce the product quantity for becoming dress shaft collar, has widened the application of casing head product Range.

In some embodiments, the structural schematic diagram of cone seals part is as shown in figure 23；The excircle of cone seals part 51 For cone periphery 52, for being contacted with the cone seals cover 31 for becoming dress wellhead sealing flange 30, there is 54 structure of cap top on top, Hollow part is suit through-hole 53, is contacted for being encircled with 16/ sleeve body 17 of casing coupling, and lower mouth is planar end surface, with casing Offset plate pressing plate 1515 in box cupling hanger 15/ (ontology hanger 1500) component contacts.

The cone seals part 51 can adapt to the well head background of 17 two kinds of tube bodies of casing coupling 16 and sleeve body, and body becomes Change the suit through-hole 53 that point is in 51 structure of cone seals part for two kinds of sizes of casing coupling 16 and sleeve body 17 to have There is different diameters, and there is versatility with dress wellhead sealing flange 30 and other changes dress shaft collar product is become, therefore, it is possible to It is corresponding to reduce the product quantity become in dress shaft collar, improve each general and compatibility facility for becoming dress shaft collar product.

In some embodiments, the matching relationship of cone seals cover and cone seals part becomes as shown in Figure 24 A, 24B, 24C Fill wellhead sealing flange 30 (can be the common flanges such as standard flange 33, double flanges 37, welded flange 40 or screwed flange 42) Middle part have cone seals cover 31, the shape of the cone seals cover 31 is up-small and down-big female cone tubular, cone seals cover 31 with 32 junction of flange through-hole forms flat circular bead surface, the inner circle conic tube face of cone seals cover 31 with outside the cone of cone seals part 51 Disc 52 contacts, and is fastenedly connected by flange bolt 13 to becoming dress wellhead sealing flange 30 and the formation of casing head body flange 1, from And the cone seals part 51 to being installed in cone seals cover 31 forms and squeezes, expands, and cone seals part 51 is made to generate pressure holding and fill out Effect is filled, pressure holding sealing effect is realized in the further sealing formed with 16/ sleeve body 17 of casing coupling.

Sealing principle is pressed, as shown in Figure 24 C, 51 lower face of cone seals part and (the casing sheet of casing coupling hanger 15/ Body hanger 1500) the offset plate pressing plate 1515 in component contacts, support is formed, it is close that 31 body of cone seals cover is slightly less than cone The body of sealing 51 is initially formed 31 lower port of cone seals cover extremely when cone seals cover 31 is contacted with cone periphery 52 Part cone section face is contacted with the part of cone periphery 52 cone section face, and cone seals cover is formed in the case where flange bolt 13 fastens pulling force 31 inner cavities move down and to the extrusion packing effect of cone seals part 51, the stress in above process of cone seals part 51 and change Shape is complicated, forms the extruding force of not only oriented 31 upper space of cone seals cover expansion, but also on oriented periphery any direction Crimp power.When becoming dress wellhead sealing flange 30 and casing head body flange 1 fastens in place, cone seals cover 31 and cone Sealing element 51, casing coupling 16 etc. respectively coordinate the gap of section also to form totally-enclosed contact, and each contact-segment face forms High Voltage ring It embraces and squeezes and press sealing effect, the further connection and sealing realized with 16/ sleeve body 17 of casing coupling.

The deformation characteristic for having developed and used rubber material of the cone seals part is (big in 52 middle and lower sections face of cone periphery Bore end) it is initially formed and is contacted with the part of cone seals cover 31 cone section face, form sealing in further contact process downwards Part hypomere is squeezed in advance, and the top of cone seals cover 31 is not contacted with cone seals part 51 in this forming process, tool There are gap, sealing element not to stress, therefore, sealing element hypomere is under the force effect that is squeezed, sealing member material inside and configuration Upper meeting focused energy slides to top, and more keeps original speciality of sealing element epimere material, when institute in cone seals cover 31 There is attaching space all with when being combined into design value, cone seals part 51, which also maintains, meets extrusion and the filling having and pressure Sealing characteristics are held, original material speciality, physical characteristic that sealing element upper space has preferably is maintained, enhances sealing element The deformation of material and life characteristic.

In some embodiments, become the installation process of dress wellhead sealing flange 30 as shown in Figure 24 A, 24B, 24C, when installation First cone seals part 51 is sleeved in 16/ sleeve body 17 of casing coupling, and allows cap top 54 and casing coupling/sleeve body Section contacts, and whether in specified value, do not meet such as also needs separately to apply other skills fit clearance between confirming each opposing connections part Art processing, then 30 cone seals cover of dress wellhead sealing flange, 31 inner circle cone cylinder face will be become and be sleeved on cone along cone periphery 52 On sealing element 51, using the uniformly reinforcing in a circumferential direction of flange bolt 13, realizes and flange face is compressed and sealing element is squeezed Pressure.For the friction for reducing in installation process, the skills such as coating lubricating oil can be selected to each contact surface/place.

In some embodiments, standard flange 33 is somebody's turn to do with the combining structure schematic diagram of cone seals part 51 as shown in Figure 24 D Standard flange 33 is mutually parallel by two, meet the flange face of relevant criterion model or ring flange is interconnected to form entirety；Mark The connecting end surface of quasi- flange 33 and casing head body flange 1 is formed with flange steel ring slot 14 and bolt hole 20, and forms fastening, close Envelope, connection, entirety is formed with casing head body flange 1；33 other end of standard flange be formed with production tree bottom flange same specification, There are gasket ring slot 33 in the connection scheme of model, end face, are evenly distributed in flange studding hole 35, are needed for connection and sealing completion well head The miscellaneous equipment wanted.Equipped with protection board 36 on 33 joint face of standard flange, to protect joint face and structure；Hanging ring 21 is production Product focus point, for carrying, installing hanging；The flange through-hole 32 of perforation and diameter >=production set are formed among standard flange 33 Pipe through-hole 18 passes through underground apparatus for the operation of completion later stage；Flange through-hole 32 corresponds to 1 connecting pin of body flange and is equipped with cone Seal closure 31 is connected and is sealed for being formed with casing coupling 16 or sleeve body 17.

In some embodiments, the combining structure schematic diagram of double flanges 37 and cone seals part 51 is as shown in Figure 24 E, this pair 37 structure of flange, mainly meeting well workover, the sidetracking in completion later stage etc. need to repeat to install the connection of wellhead blowout preventor equipment.Double methods Orchid 37 is interconnected to form entirety by two ring flanges 39, and compared with standard flange 33, structure change is two connecting pins Face be 39 form of ring flange (specification, model can be equal/it is different, it is identical, ' Double-face flange ' form can be made, to reduce Connection height), 32 one end of flange through-hole at intermediate position is 31 structure of cone seals cover, and the other end is formed with cone approaching face 38, It passes through for being inducted into well apparatus, eliminates and hit and damage.Ring flange 39 and casing head body flange 1 or preventer flange are logical It crosses flange bolt 13 and the formation of flange steel ring slot 14 is fastened, sealed, being connected as entirety.

In some embodiments, welded flange 40 is welded with the combining structure schematic diagram of cone seals part 51 as shown in Figure 24 F 40 structure of acting flange, the main later stage completion well head connection for meeting form not up to standard, meets " nonstandard existing for the wellhead equipment of part It is accurate " form (manufacturer be intentionally formed specialize in, special type product), purpose, function are to be formed by welded flange 40 Changeability realizes and docked with arbitrary connector, meets inconvenient in the field environment construct or scene has and forbids fire operation item Money requirement, ensures safe construction and welding quality.

40 one end of welded flange is formed with the ring flange 39 that can be connect with casing head body flange 1, the centre of same end face 31 structure of cone seals cover is formed in through-hole 32；The other end remain with can according to JA(junction ambient) realize secondary operation, manufacture Welding section face 41 enhances changeability, the adaptability of welded flange 40.Welded flange 40 is close with 33 body of standard flange, area It is not to remain with the material that can reprocess manufacture far from 1 one end of casing head body flange, creates completion and become the more of dress well head Sample condition；The change dress shaft collar of welded flange more than 40 and Figure 17 corresponding embodiments forms pairing, mating installation connection.

In some embodiments, the combining structure schematic diagram of screwed flange 42 and cone seals part 51 is as shown in Figure 24 G, spiral shell 42 structural type of line flange, mainly for the protection of or restore the application of 16 well head background shape of production casing box cupling damaged.

The screwed flange 42 is close with 40 body of welded flange, and difference lies in flange through-holes 32 far from casing head body flange 1 one end is formed with the box cupling thread segment 43 with production casing box cupling 16 or other specifications, model, or deposit has can reprocess molding For the material of 43 form of box cupling thread segment.

Cone seals part structure and each cone completion become the flexible Application of dress wellhead flange and create pair in above-described embodiment Protection technique, the security context of the uniquely coupled port of well head；The recovery pretreating scheme after damaging unique well head is created, It increases the structure type of completion well head and remedies scheme, improve the architecture quality of completion well head, improve completion practice behaviour The safety of work, timeliness.

Cone seals part simple structure in above-described embodiment, difficulty of processing is low, and installation is intuitive, easy to operate, sealability Preferably, installation environment is wide in range, replaces and is easy, but as installation process is careless about, each connector fit clearance over range, in fact it could happen that 51 lower part of cone seals part " bulge " phenomenon, and opposite BT sealing flanges, cannot achieve the inspection of its sealing effect, and can not see Examine internal state；

In order to solve the above technical problems, exploration is a kind of in following embodiment and BT sealing flange structures are equivalent or surmount its work( The special-shaped of energy characteristic becomes dress wellhead sealing flange, which, which becomes to fill, is equipped with profile seal part structure in wellhead sealing flange.

In some embodiments, the special-shaped structure for filling wellhead sealing flange and profile seal part that becomes is as shown in Figure 25,26；It should Profile seal part equally adapts to casing coupling 16 and sleeve body 17, and the special-shaped dress wellhead sealing flange 55 that becomes can be standard The common flanges such as flange, double flanges, welded flange, screwed flange.

Figure 25 is casing coupling and the special-shaped combining structure schematic diagram for becoming dress wellhead sealing flange；Profile seal part includes upper Two irregular seal rings 61 of lower setting, are located at top profile seal at the shading ring 64 between two irregular seal rings 61 The righting-oriented set 69 of ring upper surface and the regulation ring 58 positioned at lower part irregular seal ring lower surface；Wherein, special-shaped to become dress well head It is formed with clamping section 59 and profile seal cover 57 on the flange through-hole 32 in 55 centre of sealing flange, two sections of faces and formation Circular bead surface is contacted with casing coupling 16 in advance directly or by profile seal part, by flange bolt 13 and flange steel ring slot/steel Circle 14 realizes compression type connection and sealing；Profile seal part is limited and High Voltage by close space in the profile seal cover body 60 It squeezes, irregular seal ring 61 therein is deformed and fills each gap, and inner headed face encircles casing coupling 16, and periphery is swollen to be squeezed Profile seal cover 57, forms the swollen crowded filling sealing of High Voltage, and realization and the sealing of casing coupling and end face are connect.

Figure 26 is sleeve body and the special-shaped combining structure schematic diagram for becoming dress wellhead sealing flange；Wherein, special-shaped to become dress well Clamping section 59 on the flange through-hole 32 in 55 centre of mouth sealing flange, which passes through, increases righting-oriented set 69 and sleeve body 17 End face contacts, and profile seal cover 57 contacted by the profile seal part of thickening with sleeve body 17, and righting-oriented covers 69 and different Type sealing cover 57 in two at section a face contact in advance sleeve body 17 formed close space, profile seal part is in profile seal cover It is limited by close space in body 60 and High Voltage squeezes, irregular seal ring 61 is deformed and fills each gap, and inner headed face is encircled Sleeve body 17, periphery is swollen crowded profile seal cover 57 form the swollen crowded filling sealing of High Voltage, realize and sleeve body and end Sealing, the connection in face.

Below by taking abnormal shape becomes 55 product structure of dress wellhead sealing flange as an example, as shown in figure 27, further to special-shaped close Structure, principle, connection relation and the assembling of sealing/be described in detail using process, the principle, structure are equally applicable to other different Type sealing structure flange.

The abnormal shape becomes 55 lower face of dress wellhead sealing flange and is formed with profile seal cover body 60, and flange through-hole is made on 32 each sections of faces There are profile seal cover 57, clamping section 59,59 diameter of clamping section to be less than profile seal cover 57, be more than flange through-hole 32, each section Plane shoulder structure, the structure member for installing profile seal part are formed between face；In profile seal cover 57 section be formed with Abnormal shape becomes the sealing peep hole 56 of 55 periphery perforation of dress wellhead sealing flange, and 56 port of peep hole is formed with profile seal detection and uses Pressure gauge connection/plug 74, the sealing effect for observing the formation of profile seal part.Its principle is, no matter to main passing hole 6 With production casing formed annular space still in production casing through-hole 18 sealing effect examine, can take from two every From direction in space inject high-pressure medium mode, from profile seal detection pressure gauge connection/plug 74 from leakage feelings Condition, to confirm the sealing effect of profile seal part, no steam bubble, the state description abnormal shape for being zero without test medium or pressure tabular value Sealing element realizes reliable sealing.

In some embodiments, the structure of irregular seal ring is as shown in Figure 28 irregular seal rings；The irregular seal ring 61 is adopted It is made with rubber or with the material for squeezing flexible deformation and some strength characteristic, shape is annular shape, is up and down planar end surface, outside Slow indent 62 is formed on circumference and inner peripheral surface, outer circumference surface is contacted with profile seal cover 57, inner peripheral surface and casing coupling 16/ sleeve body 17 contacts, and the closure of inner peripheral surface forms profile seal through-hole 63, can be with the casing of two kinds of well head background shapes Realization, which is encircled, to be sealed and slides.

In some embodiments, the structure of shading ring is as shown in figure 29；The shading ring 64 is upper and lower planar end surface, intermediate section It is formed with cyclic annular negative pressure trough 65 on inside and outside periphery, is symmetrically formed with through shading ring 64 on the ring periphery diameter line of negative pressure trough 65 Two negative pressure apertures 66, can realize the connection inside and outside negative pressure trough.Shading ring 64 is mounted among two irregular seal rings 61, Component is formed, and in profile seal cover 57, negative pressure trough 65, the installation site of negative pressure aperture 66 and sealing peep hole 56 Position corresponds to, and can be formed and is mutually communicated, to realize from port of the profile seal detection with pressure gauge connection/plug 74 The sealing effect of profile seal part.

In some embodiments, the structure of regulation ring is as shown in figure 30；The regulation ring 58 is that rectangle is circular, end face 6 adjusting threaded holes 67 are uniformly formed on circumference, each adjust in threaded hole 67 is equipped with adjusting screw 68, can realize to adjusting The adjusting of the placing height on 15/ sleeve body hanger of casing coupling hanger, 1500 component of ring 58, and with profile seal cover Face 57 forms support and extrusion and displacement to internal irregular seal ring 61, to realize and 16/ sleeve body 17 of casing coupling Connection and sealing.

In some embodiments, the structure of righting-oriented set is as shown in figure 31；Righting-oriented set 69 is circular for rectangle, Inner headed face and 63 same diameter of profile seal through-hole, for being contacted with sleeve body 17；Periphery contacted with clamping section 59 and with abnormal shape 57 inner platform shoulder face of seal closure, which is consistent and forms installation, stablizes, and for cutting off casing coupling 16, only leaves sleeve body 17 The righting of well head background shape contacts, and realization allows the special-shaped dress wellhead sealing flange 55 that becomes to have versatility, can adapt to connect with casing Bind round installation connection, the sealing of 16/ sleeve body 17.

The function of righting-oriented set：After casing coupling 16 is cut off, diameter difference shape between box cupling 16 and ontology 17 is filled up At gap, create die compaction space for profile seal part；Righting abnormal shape becomes dress wellhead sealing flange 55, keeps and casing sheet Body 17 and the coaxial dimension connection of the multiple components of well head, installation；By increasing, subtracting the installation of righting-oriented set, realize that special-shaped become fills well Mouth sealing flange 55 and its structure have versatility, reduce the quantity for becoming dress shaft collar product, and promotion becomes dress well head product Functional characteristic reduces the mating cost of product.

The installation process of profile seal part and sealing principle are as follows in some embodiments, and irregular seal ring 61 has different Installation direction in type seal closure 57, respectively and type selecting correct single products opposite by both direction form component, two It is isolated by shading ring 64 among single products, the sealing group being formed on two section faces in profile seal cover 57 is fit, opening End is supported by regulation ring 58 and forms die compaction space with profile seal cover 57, and regulation ring 58 is realized by adjusting screw 68 Support Position is adjusted, and abnormal shape can be generated simultaneously in installing connection procedure by meeting the special-shaped dress wellhead sealing flange 55 that becomes Cooperation gap of the multiple connectors such as seal closure 57 and flange steel ring slot/steel ring 14 in link position, relationship；Pass through method Blue bolt 13 generates fastening force in a circumferential direction, realizes that the High Voltage to irregular seal ring 61 in profile seal cover 57 squeezes Compression swelling, further realize encircles sealing with 16/ sleeve body 17 of casing coupling, among upper and lower two irregular seal rings 61 For rigidity shading ring 64, there is Bidirectional supporting, extrusion effect；There is the sealing peep hole being in communication with the outside at 57 middle part of profile seal cover 56,64 stage casing of shading ring remains at the section section of sealing peep hole 56, and is maintained at atmospheric pressure state, and two abnormal shapes are close Be designed with the sealing structure that can bear high internal pressure and self-styled characteristic on 61 opposite direction of seal ring, no matter in the annular space of main passing hole 6, Or the high pressure formed in the pit shaft of production casing through-hole 18 can be isolated by the irregular seal ring 61 of two groups of separation, be formed mutually not The two sections of confined spaces communicated.When pressure, fluid train will be led to 64 stage casing of shading ring by any of which group seal fails At negative pressure aperture 66, to which abnormal shape can be examined by observing the state at profile seal detection pressure gauge connection/plug 74 The sealing effect of sealing ring 61.The object that coating lubricating oil, lipid may be selected in 61 installation process of irregular seal ring, is rubbed with reducing It wipes, can also more smoothly be installed by some tools, skill realization.

In some embodiments, it to meet more harsh environment, needs the irregular seal ring of colloid replacing with metal sealing The structure of ring, as shown in figure 31；The metallic packing ring 70 is easily deformed and (Al/ is made in material that corrosion resistance is strong by being squeezed Pb/Cu/Sn/), body is close with irregular seal ring 61, and difference is that upper surface increases positive facial disfigurement slot 71, for being pressurized Increase the sealing that first deforms to the extruding force of edge metal under state, inside and outside annulus side has different from irregular seal ring The side of 61 slow indent, 62 structure shape deforms slot 73, these trough body structures are provided to increase the local extruding force of becket and shape At better juxtaposition metamorphose.Metallic packing ring 70 have plastic degeneration and steel sealing characteristic, therefore can only once mounting success, With inlaying, curing joint efficiency, corrosion resistance is strong.

There is above-mentioned profile seal part structure good sealing principle and performance, combining form to adapt to become dress shaft collar All over products, general and interchangeability is strong, and the multinomial complicated well head background in completion field operation disclosure satisfy that, be user Technical finesse platform the most convenient is created, is without fear of an attack from the rear, it also requires being carried out to the fit clearance of each connector fine It measures, calculate, therefrom extrapolate the regulated value needed for installation, just can guarantee that installation has the ideal effect in design.This survey Amount and accurate calculation are to create a wide in range processing platform for the well head background that scene has been formed, by live skill Art personnel, which are independently determined, can solve the problems, such as multinomial complicated well head.

The above-mentioned each product structure characteristic of the present invention belongs to the surface of revolution formed around System of Rotating about Fixed Axis, there is cylindrical surface, circular conical surface, circle Hole face, anchor ring, circle circular bead surface, locally there is plane, the drilling of milling, and other elements or observation are connected for installation.

The product provided in the various embodiments described above of the present invention is only the description of a kind of structure type or principle in the present invention, It is not limited to the other structures formal product formed by this technology, principle.

One embodiment of the present invention has been described in detail above, but the content be only the present invention preferable implementation Example should not be construed as limiting the practical range of the present invention.It is all according to all the changes and improvements made by the present patent application range Deng should all still fall within the scope of the patent of the present invention.

Claims (24)

1. completion becomes encapsulation tube head, which is characterized in that including production casing, casing hanger, body flange and protective device；Institute It states production casing to be fixedly arranged in described sleeve pipe hanger, described sleeve pipe hanger is set in the body flange, the protection Device is fixedly arranged on above the body flange；

Described sleeve pipe hanger includes the offset plate pressing plate from top to bottom set gradually, sealing plate, slip insert gland and hanger Ontology, follower bolt stretch into after sequentially passing through the offset plate pressing plate, sealing plate, slip insert gland in hanger body, and by pressing Crab bolt tightens fixation, and the slip insert for holding the production casing tightly is installed with below the slip insert pressing plate；

The hanger body periphery is from top to bottom sequentially formed with cylindrical section, conical section and short cylindrical section；

It is equipped with main passing hole in the body flange, is from top to bottom sequentially formed with smooth section in the main passing hole, sets taper Section and middle smooth section, which mutually agrees with to be formed with the conical section in above-mentioned hanger body sets.

2. completion according to claim 1 becomes encapsulation tube head, which is characterized in that the sealing plate is cirque structure, Its upper surface is convex arc surface.

3. completion according to claim 1 becomes encapsulation tube head, which is characterized in that the hanger body is equipped with above and below several The spring mounting hole of perforation and spring screw hole, spring screw hole are located at spring mounting hole lower part, pacify in the spring mounting hole Equipped with compressed spring, the compressed spring top is abutted with slip insert gland lower surface, is installed in the spring screw hole There are spring screw, spring screw top to be abutted with compressed spring bottom end, and compression is fixed in spring screw hole, the spring screw It is shifted to install with the follower bolt.

4. completion according to claim 1 becomes encapsulation tube head, which is characterized in that if body flange top circumferential direction is equipped with Dry hanger lock pin, when casing hanger is set when in the body flange, the hanger lock pin and the panel nut Outer surface abuts.

5. completion according to claim 1 becomes encapsulation tube head, which is characterized in that the slip insert is conical structure, and is wrapped Independent three pieces are included, a guiding fixture block is equipped on every box cupling slip insert, is correspondingly provided in the slip insert pressing plate and is led with this The slip insert guide groove coordinated to fixture block, the facing of the slip insert are abutted with production casing periphery.

6. becoming encapsulation tube head according to any completions of claim 1-5, which is characterized in that the production casing includes casing Ontology and the casing coupling for being fixedly arranged on described sleeve pipe body upper part.

7. completion according to claim 6 becomes encapsulation tube head, which is characterized in that described sleeve pipe hanger is outstanding for casing coupling Hanging device, the slip insert in described sleeve pipe box cupling hanger are box cupling slip insert, the box cupling facing and casing coupling of box cupling slip insert Periphery abuts, and the short cylindrical section circumferential direction of described sleeve pipe box cupling hanger lower part is equipped with several jackscrews, in the casing coupling hanger Including up and down box cupling through-hole and casing suppending hole, described sleeve pipe box cupling be fixedly arranged on by the effect of the holding of box cupling slip insert In the box cupling through-hole, described sleeve pipe ontology is locked in by the jackscrew in described sleeve pipe suppending hole.

8. completion according to claim 7 becomes encapsulation tube head, which is characterized in that the box cupling facing is arranged circumferentially by several Longitudinal alveolus composition.

9. completion according to claim 6 becomes encapsulation tube head, which is characterized in that described sleeve pipe hanger is outstanding for sleeve body Hanging device, the slip insert in described sleeve pipe ontology hanger are ontology slip insert, the ontology facing and sleeve body of ontology slip insert Periphery abuts, and the short cylindrical section of described sleeve pipe ontology hanger lower part is equipped with locked mechanism, includes in the sleeve body hanger Casing suppending hole up and down, described sleeve pipe ontology are acted on by the holding effect and the locking of locked mechanism of ontology slip insert It is fixedly arranged in described sleeve pipe suppending hole.

10. completion according to claim 9 becomes encapsulation tube head, which is characterized in that the ontology facing is single tooth, week To, multi-layer shape structure.

11. completion according to claim 9 becomes encapsulation tube head, which is characterized in that locked mechanism be mandril locked mechanism or One kind in connecting rod locked mechanism.

12. completion according to claim 11 becomes encapsulation tube head, which is characterized in that the mandril locked mechanism is a mandril Pin, described sleeve pipe ontology hanger is interior to be equipped with mandril threaded hole, and mandril screw, described sleeve pipe ontology are equipped in the mandril threaded hole Be equipped with lock pin through-hole in the short cylindrical section of hanger lower part, be equipped with the crown bar pin in the lock pin through-hole, the mandril threaded hole with Lock pin through-hole vertically communicates, and the end of the crown bar pin is equipped with 45 ° of cone inclined-planes, and with 45 ° of circles of the mandril screw end Cone inclined-plane keeps 90 ° of azimuth axis to be crossed to form contact, and adjusting mandril screw generates then oblique by cone to bottom offset Crown bar pin is pushed in face, and the end face of the crown bar pin is abutted with sleeve body.

13. completion according to claim 11 becomes encapsulation tube head, which is characterized in that the connecting rod locked mechanism is a connecting rod Pin, described sleeve pipe ontology hanger is interior to be equipped with connecting rod through-hole, and connecting-rod bolts, the suspension of described sleeve pipe ontology are equipped in the connecting rod through-hole It is equipped with lock pin straight slot in the short cylindrical section of device lower part, the link pin, the connecting rod through-hole and lockpin ventilating are equipped in the lock pin straight slot Slot vertically communicates, and the top of the connecting-rod bolts is equipped with an adjustings rotating nuts, the rotating nuts can above be carried by rotating or The link pin is transferred, the connecting-rod bolts lower end is rotatablely connected by one end of connecting rod pivot pin and link pin, the link pin The other end by connecting rod pivot pin can the relatively described lock pin straight slot turn to and abutted with sleeve body.

14. completion according to claim 1 becomes encapsulation tube head, which is characterized in that the protective device is protective cap, described Protective cap includes flange protection plate, wellhead protecting plate and hanger protection board；The flange protection plate is doughnut-shaped steel plate, passes through method Blue bolt is connect with body flange, and the short pipe being connect with wellhead protecting plate is welded in hollow part；Short pipe is got on the bus to be formed with and be cut Tape identification slot is cut, which is equipped with the hanger protection board.

15. completion according to claim 1 becomes encapsulation tube head, which is characterized in that the protective device is that change dress well head is close Flange is sealed, cone seals cover is equipped in the change dress wellhead sealing flange, the change dress wellhead sealing flange passes through cone seals The cooperation of cover and cone seals part is tightly connected with production casing.

16. completion according to claim 15 becomes encapsulation tube head, which is characterized in that the cone seals cover is up-small and down-big Cone tube shape structure, cone seals cover and flange through-hole junction form flat circular bead surface, the inner circle conic tube of cone seals cover Face contacts sealing with the cone periphery of cone seals part.

17. completion according to claim 16 becomes encapsulation tube head, which is characterized in that top is equipped on the cone seals part Cap roof construction, the cap top upper surface are abutted with flat circular bead surface, and lower surface is abutted with the upper surface of the production casing.

18. completion according to claim 1 becomes encapsulation tube head, which is characterized in that the protective device is that special-shaped become fills well Mouth sealing flange, which, which becomes on the flange through-hole for filling wellhead sealing flange, is formed with clamping section and profile seal cover, this section of face Between form circular bead surface, be located in clamping section at the top of the production casing, profile seal part is located in the profile seal cover, institute It is close by the cooperation of the profile seal cover and the profile seal part and production casing to state special-shaped change dress wellhead sealing flange Envelope connection.

19. completion according to claim 18 becomes encapsulation tube head, which is characterized in that the profile seal part includes above dividing into Two irregular seal rings setting, positioned at two profile seal interannulars shading ring and be located at lower part irregular seal ring lower surface Regulation ring, section is formed in profile seal cover fills the sealing peep hole of wellhead sealing flange excircle face perforation with special-shaped become.

20. completion according to claim 19 becomes encapsulation tube head, which is characterized in that irregular seal ring shape is annular shape, It is planar end surface up and down, is formed with slow indent on excircle and inner peripheral surface, outer circumference surface is contacted with profile seal cover, inner peripheral surface It is contacted with production casing.

21. completion according to claim 19 becomes encapsulation tube head, which is characterized in that the shading ring is upper and lower planar end surface, It is formed with cyclic annular negative pressure trough on the inside and outside periphery of in-between section, is symmetrically formed with through shading ring on the ring periphery of negative pressure trough Negative pressure aperture, the negative pressure aperture are mutually communicated with sealing peep hole.

22. completion according to claim 19 becomes encapsulation tube head, which is characterized in that the regulation ring is rectangle annular shape knot Structure is uniformly formed with several adjusting threaded holes on the circumference of lower face, and each adjust in threaded hole is equipped with adjusting screw, the tune The cap portion of section screw is abutted with the offset plate pressing plate upper surface of casing hanger.

23. completion according to claim 19 becomes encapsulation tube head, which is characterized in that the profile seal part further includes being oriented to Supporting positive cover, when production casing with clamping is intersegmental have gap when, the righting-oriented set be located at the gap in, the righting-oriented set is Rectangular ring structure.

24. completion according to claim 1 becomes encapsulation tube head, which is characterized in that body flange lower part circumferential direction is equipped with If dry side circulation port, which is equipped with the part plan for connecting side flange.