CN104653149A - Oil-gas well gas-seal stage collar and assembly method thereof - Google Patents
Oil-gas well gas-seal stage collar and assembly method thereof Download PDFInfo
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- CN104653149A CN104653149A CN201410850044.3A CN201410850044A CN104653149A CN 104653149 A CN104653149 A CN 104653149A CN 201410850044 A CN201410850044 A CN 201410850044A CN 104653149 A CN104653149 A CN 104653149A
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- closedown
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- seat
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 238000004513 sizing Methods 0.000 claims description 57
- 239000003921 oil Substances 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 18
- 230000000694 effects Effects 0.000 claims description 17
- 230000005484 gravity Effects 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 5
- 230000037361 pathway Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 14
- 208000034656 Contusions Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses an oil-gas well gas-seal stage collar and an assembly method thereof. The stage collar comprises a body, a closing sleeve, a circumferential anti-rotation mechanism, a first clamping lock mechanism, a second clamping lock mechanism, an unlocking mechanism, a stage mechanism and a lower connector, wherein an outer stage hole is radially formed in a tube wall; the closing sleeve is arranged in the body, the closing sleeve is in sliding seal with the body, and an inner stage hole is radially formed in the tube wall of the closing sleeve; the circumferential anti-rotation mechanism is used for limiting circumferential relative displacement between the closing sleeve and the body; the first clamping lock mechanism is used for fixing the closing sleeve in a first position of the body; the second clamping lock mechanism is used for fixing the closing sleeve in a second position of the body; the unlocking mechanism is used for unlocking the first clamping lock mechanism; the stage mechanism is arranged in the closing sleeve; the lower connector is in sealing connection with the lower connecting end of the body, and outer connecting threads are formed on the lower end of the lower connector. Before staging, the closing sleeve is fixed in the first position, the inner and outer stage holes are opposite, and the inner stage hole is sealed by the stage mechanism; during staging, the inner stage hole is opened; after staging, the first clamping lock mechanism is unlocked, the closing sleeve moves downward to the second position, so as to be fixed, and the inner and outer stage holes are staggered. The oil-gas well gas-seal stage collar is convenient to assemble.
Description
Technical field
The present invention relates to oil gas well cementing operation equipment technical field, particularly relate to a kind of Oil/gas Well hermetic seal sizing collar and assemble method thereof.
Background technology
Current Oil/gas Well deep-well, ultradeep well, inclined shaft, horizontal well adopt hermetic seal casing cementing more, and also have hermetic seal demand for corresponding stage well cementing tool, applying of hermetic seal sizing collar will become inexorable trend simultaneously.And existing sizing collar is non-hermetically sealed envelope sizing collar, not possessing hermetic seal ability, overall hermetic seal effect can not be improved as adopted the method for additional transit joint.And existing sizing collar needs to polish to locked groove edge to load lock ring when assembling, thus weakens auto-lock function.And when closing cover and loading body, the sealing ring of closing cover under the effect of body internal thread and escape easily scraped finish damage, causing seal failure, is that airtight quality reduces.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of Oil/gas Well hermetic seal sizing collar and assemble method thereof, and main purpose is convenient to assembling, ensures sizing collar sealing performance.
For achieving the above object, the present invention mainly provides following technical scheme:
On the one hand, embodiments provide a kind of Oil/gas Well hermetic seal sizing collar, comprising:
Body, described body is body, and the upper end of described body has internal thread and forms link, and lower end has internal thread and forms lower link, and on the tube wall of described body, radial direction has outer grading-hole;
Close cover, be located in described body, and slipper seal between described closedown cover and body, on the tube wall of described closedown cover, radial direction has internal classification hole;
Circumference rotation-preventing mechanism, limits circumferential relative displacement between described closedown cover and described body;
First locking mechanism, for being axially fixed at primary importance by described closedown cover relative to described body;
Second locking mechanism, for being axially fixed at the second place by described closedown cover relative to described body;
Release mechanism, for unlocking the first locking mechanism, makes described cut out cover move vertically;
Classification mechanism, is located in described closedown cover;
Lower contact, is threaded with the lower link of described body, seals between described lower contact and described body, and the lower end of described lower contact has outer connecting thread;
Before classification, described closedown cover is axially fixed at primary importance relative to described body by described first locking mechanism, described internal classification hole is relative with described outer grading-hole, and described classification mechanism closes described internal classification hole, and now described sizing collar is radial inside and outside isolated body;
During classification, described classification mechanism opens internal classification hole under hydraulic action, and described internal classification hole and described outer grading-hole form classification channels open, and described sizing collar is by conducting inside and outside internal classification hole and outer grading-hole;
After classification, described release mechanism unlocks the first locking mechanism under hydraulic action, the second place is moved to vertically under making described closedown be enclosed within hydraulic action, described closedown is overlapped relative to described body axial restraint by described second locking mechanism, now described internal classification hole and described outer grading-hole stagger, described classification pathway closure.
As preferably, the inwall on described body below link has annular shoulder, when described closedown cover is fixed on primary importance, the upper end of described closedown cover is butted on described annular shoulder.
As preferably, described first locking mechanism comprises:
First annular inner card cage, is circumferentially opened on the inwall of described body;
First annular exterior bayonet slot, be circumferentially opened on described outer wall of closing cover, in described first annular exterior bayonet slot, radial direction offers penetrating hole clipping;
Lock ring, be assemblied in described first annular exterior bayonet slot, described lock ring is split-type or open type, and the internal face of described lock ring has the locking key of radial Chuan Guo the hole clipping extended, and the end of described locking key has lower inclined plane;
Described release mechanism comprises cut out seat, described closedown seat is located in described closedown cover, described closedown seat and described closedown overlap between slipper seal, the excircle of described closedown seat has the locked groove matched with the locking key of described lock ring, the lower edge of described locked groove is the inclined-plane matched with the lower inclined plane of locking key end, and two inclined-planes interact and make described lock ring radial dilatation;
Before classification and classification time, described closedown seat by the first shear pin with described close overlap fix, when inwall below the upper link of described body has annular shoulder, the upper end of described closedown seat is butted on described annular shoulder, locked groove and the described locking key of described closedown seat misplace in the axial direction, described lock ring be stuck under the effect of described closedown seat outer wall simultaneously the first annular inner card cage with make in the first annular exterior bayonet slot described closedown overlap relative in the axial direction with described body fixing;
After classification, by shut-off plug close described closedown seat make described closedown seat under the effect of hydraulic pressure, cut off the first shear pin to slide down to locked groove relative with described locking key, described lock ring is radially contracted in described first annular exterior bayonet slot, remove the locking of closing between cover and body, described locking key is stuck in locked groove, described closedown cover is fixed with described closedown seat, described closedown is moved downward to the second place under being enclosed within the drive of closing seat, and described closedown is overlapped relative to described body axial restraint by described second locking mechanism.
As preferably, the lower end outside of described lock ring forms outer inclined-plane, the lower groove of the first annular inner card cage of described body is along being the inclined-plane suitable with the outer inclined-plane of lock ring, and under described first annular inner card cage, the inclined-plane on groove edge and the outer inclined-plane of lock ring interact and make described lock ring radial contraction.
As preferably, described closedown cover inwall has the first spacing shoulder, described closedown seat come downwards to locked groove relative with described locking key time, the lower end of described closedown seat is butted on described first spacing shoulder.
As preferably, described second locking mechanism comprises:
Second annular inner card cage, is circumferentially opened on the inwall of described body;
Second annular exterior bayonet slot, is circumferentially opened on described outer wall of closing cover;
Snap ring, is assemblied in described second annular exterior bayonet slot;
Before classification and classification time, described second annular inner card cage and described second annular exterior bayonet slot misplace, and described snap ring is embedded in described second annular exterior bayonet slot under the effect of described inner body wall;
After classification, it is relative with the second annular exterior bayonet slot that described closedown cover comes downwards to the second annular inner card cage, and described snap ring elastic dilatation is stuck in the second annular inner card cage and the second annular exterior bayonet slot simultaneously.
As preferably, when described closedown cover is positioned at primary importance, the lower end of described closedown cover is positioned at the top of described second annular inner card cage.
As preferably, described classification mechanism comprises closes cover and support set, described closed cover comprises the larger large footpath section of upper end external diameter and the less path section of lower end external diameter, described large footpath section and described closedown overlap slipper seal, described support set and described close overlap fixing, the upper end of described support set is inserted between described closedown cover and the path section of described closed cover, and described support set and described closedown seal between overlapping, slipper seal between described support set and described closed cover;
Before classification, described closed cover and described support set are fixed by the second shear pin, and described closed cover and described support set close described internal classification hole;
During classification, described close be enclosed within hydraulic action under cut off the second shear pin slide downward and expose internal classification hole, the classification channels open that described internal classification hole and outer grading-hole are formed;
Described close be enclosed within hydraulic pressure direct effect under the pressure reduction up and down that produces cut off the second shear pin or adopt close cover described in the shutoff of gravity plug after under hydraulic action described closed cover cut off the second shear pin;
When after closed cover described in the shutoff of employing gravity plug, under hydraulic action, the second shear pin cut off by described closed cover, the internal diameter that described sizing collar closes cover portion is less than the internal diameter that sizing collar closes cover top.
As preferably, described inwall of closing cover has the second spacing shoulder, and before classification, the upper end of described closed cover is butted on described second spacing shoulder.
As preferably, described circumferential rotation-preventing mechanism comprises:
Anti-rotation pin-and-hole, radial direction is opened on body;
Anti-rotation groove, is opened on described outer wall of closing cover vertically;
Stop pin, is assemblied in anti-rotation pin-and-hole, and matches with described anti-rotation groove.
On the other hand, embodiments provide a kind of assemble method of Oil/gas Well hermetic seal sizing collar, comprise the steps:
First sealing ring is respectively charged in the seal groove of each assembly of composition sizing collar, sealing surface coating lubricating oil;
In the top loading closedown cover of closedown cover, make locked groove relative with the hole clipping of the first annular exterior bayonet slot by closing seat, be assemblied in by lock ring in the first annular exterior bayonet slot, locking key inserts in locked groove;
Load from closedown cover lower end and close cover and support set, support set overlaps with closedown to be fixed by screw thread, close cover to be fixed by the second shear pin with support set, closed cover closes internal classification hole with support set makes classification passage keep initial closed state, is assemblied in by snap ring in the second annular exterior bayonet slot;
Interim gasket ring is loaded onto in the second annular inner card cage of body, the internal face of interim gasket ring flushes with the internal face of body, the internal thread of body lower end and escape protective jacket are protected, the closedown cover assembled above is loaded body from body lower end, closedown is overlapped first annular exterior bayonet slot is corresponding with the first annular inner card cage of body, seat will be closed upwardly with temporary cushion block, now close the inclined-plane on edge under the locked groove of seat to act on mutually with the lower inclined plane of locking key end, radial component makes lock ring coincide to the first annular inner card cage of external expansion and body, lock rings closes the axial displacement of cover and body,
Adjustment body and the circumferential position of closing cover make internal classification hole and outer grading-hole mutually corresponding, be assemblied in by stop pin in the anti-rotation pin-and-hole of body, make the front end of stop pin and close the anti-rotation groove that puts and match, the circumferential displacement of cover and body is closed in locking;
Closedown seat and closedown are applied mechanically the first shear pin fix, locking is closed seat and is closed the axial displacement of overlapping;
Remove cushion block, gasket ring, protective sleeve, be tightly connected lower contact threaded upper ends body lower end.
Compared with prior art, beneficial effect of the present invention is:
The sizing collar structure of the embodiment of the present invention is simple, is easy to assembling, ensure that sealing performance.And the sizing collar progressive operation of the embodiment of the present invention is simply effective, improves well cementing operation efficiency.Owing to having excellent hermetic seal ability, control natural gas leaking that can be strict under the operating mode of complexity, prevents screw corrosion from destroying, reduces costs, raise the efficiency.The structure of the sizing collar of the embodiment of the present invention can be overall from bottom assembling, not only reduces assembling difficulty, and ensure that the sealing effectiveness of the sizing collar after assembling.The embodiment of the present invention overcomes assembling difficulty by measures such as interim gasket ring, ceilings, avoids the misdeed that polishing locked groove edge loads by force, maintains the lock control function of product.Avoid the impaired problem causing seal failure of sealing ring in assembling process simultaneously.Ensure that sealing performance, improve product quality.
Accompanying drawing explanation
Fig. 1 to Fig. 3 is that the structure of Oil/gas Well hermetic seal sizing collar three kinds of states of the embodiment of the present invention partly cuts open figure;
Fig. 4 is the schematic diagram that in the embodiment of the present invention, lock ring is combined with locked groove;
Fig. 5 is the structural representation of lock ring in the embodiment of the present invention;
Fig. 6 to Fig. 8 be respectively with the sizing collar of the embodiment of the present invention with the use of shut-off plug, gravity plug and the flexible structural representation filled in.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
Fig. 1 is that the structure before the Oil/gas Well hermetic seal sizing collar classification of the embodiment of the present invention partly cuts open figure; Structure when Fig. 2 is the Oil/gas Well hermetic seal sizing collar classification of the embodiment of the present invention partly cuts open figure; Fig. 3 is that the structure after the Oil/gas Well hermetic seal sizing collar classification of the embodiment of the present invention partly cuts open figure.As shown in Figure 1 to Figure 3, Oil/gas Well hermetic seal sizing collar, comprising:
Body 1, body 1 is body, and the upper end of body 1 has internal thread and forms link 101, and lower end has internal thread and forms lower link 102, and on the tube wall of body 1, radial direction has outer grading-hole 103;
Close cover 3, be located in body 1, and close slipper seal between cover 3 and body 1, on the tube wall of closedown cover 3, radial direction has internal classification hole 301;
Circumference rotation-preventing mechanism 9, circumferential relative displacement between cover 3 and body 1 is closed in restriction;
First locking mechanism 7, for being axially fixed at primary importance by closedown cover 3 relative to body 1;
Second locking mechanism 8, for being axially fixed at the second place by closedown cover 3 relative to body 1;
Release mechanism 4, for unlocking the first locking mechanism 7, making closedown overlap 1 can move vertically;
Classification mechanism 5, is located at and closes in cover;
Lower contact 2, is threaded with the lower link 102 of body 1, seals between lower contact 2 and body 1, and the lower end of lower contact 2 has outer connecting thread;
Before classification, closedown cover 3 is axially fixed at primary importance relative to body 1 by the first locking mechanism 7, internal classification hole 301 is relative with outer grading-hole 103, and classification mechanism 5 closes internal classification hole 301, and now sizing collar is radial inside and outside isolated body (see Fig. 1);
During classification, classification mechanism 5 opens internal classification hole 301 under hydraulic action, and internal classification hole 301 and outer grading-hole 103 form classification channels open, and sizing collar is by conducting (see Fig. 2) inside and outside internal classification hole 301 and outer grading-hole 103;
After classification, release mechanism 4 unlocks the first locking mechanism 7 under hydraulic action, make closedown overlap 3 and move to the second place vertically under hydraulic action, second locking mechanism 8 by closedown cover 3 relative to body 1 axial restraint, now internal classification hole 301 and outer grading-hole 103 stagger, classification pathway closure (see Fig. 3).
The sizing collar structure of the embodiment of the present invention is simple, is easy to assembling, ensure that the sealing performance of sizing collar, and progressive operation is simple.
Preferred as above-described embodiment, the inwall on body 1 below link 101 has annular shoulder 104, and close cover 3 when being fixed on primary importance, the upper end closing cover 3 is butted on annular shoulder 104.Arranging annular shoulder 104 can make closedown alignment determine to be positioned at primary importance when assembling, and when connecting into tubing string, annular shoulder 104 forms sealing limited step, and tubing string end and the annular shoulder 104 of top form end part seal, increases sealing effectiveness.
Preferred as above-described embodiment, the first locking mechanism 7 comprises:
First annular inner card cage 71, is circumferentially opened on the inwall of body 1;
First annular exterior bayonet slot 73, be circumferentially opened on the outer wall of closedown cover 3, in the first annular exterior bayonet slot 73, radial direction offers penetrating hole clipping;
Lock ring 72, be assemblied in the first annular exterior bayonet slot 73, lock ring is that split-type is (see Fig. 5, Fig. 5 is the lobe in split-type lock ring) or open type, the internal face of lock ring 72 has the locking key 720 of radial Chuan Guo the hole clipping extended, and the end of locking key 720 has lower inclined plane 721 (see Fig. 4);
Release mechanism 4 comprises closes seat 42, closing seat 42 is located in closedown cover, close seat and close slipper seal between cover 3, the excircle of closedown seat 42 has the locked groove 41 matched with the locking key 720 of lock ring 72, the lower edge of locked groove 41 is that the inclined-plane, inclined-plane 410, two matched with the lower inclined plane 721 of locking key 720 end interacts and makes lock ring 72 radial dilatation;
Before classification when (shown in Fig. 1) and classification (shown in Fig. 2), close seat 42 to be fixed by the first shear pin 11 and closedown cover 3, when inwall below the upper link of body 1 has annular shoulder 104, the upper end closing seat is butted on annular shoulder 104, the locked groove 41 of closing seat 42 misplaces in the axial direction with locking key 720, and lock ring 72 under the effect of closing seat 42 outer wall, be stuck in the first annular inner card cage 71 simultaneously and to make closedown overlap in the first annular exterior bayonet slot 73 3 relative in the axial direction with body 1 fixing; Arranging of annular shoulder 104 can, when assembling, make closedown seat 42 be accurately positioned in the position fixing with closing cover 42.Certainly, by body 1 threaded upper ends connecting positioning sleeve, the location to closing seat 42 also can be realized, and to closing the location of cover;
After classification (shown in Fig. 3), closed by the shut-off plug 17 shown in Fig. 6 and close seat 42, making closedown seat 42 under the effect of hydraulic pressure, cut off the first shear pin 11, to slide down to locked groove 41 relative with locking key 720, lock ring 72 is radially contracted in the first annular exterior bayonet slot 73, remove the locking of closing between cover 3 and body 1, locking key 720 is stuck in locked groove 41, close cover 3 to fix with closedown seat 42, close cover 3 close seat 42 drive under be moved downward to the second place, the second locking mechanism 8 by closedown cover 3 relative to body 1 axial restraint.
In the above-described embodiments, the lower end outside of lock ring 72 forms outer inclined-plane 722, the lower groove of the first annular inner card cage 71 of body 1 is along being the inclined-plane suitable with the outer inclined-plane 722 of lock ring 72, and the inclined-plane on first annular inner card cage 71 times groove edges and the outer inclined-plane 722 of lock ring 72 interact and make lock ring 72 radial contraction.This structure can realize the contraction of split-type lock ring, and the contraction of assist openings formula lock ring.Closedown cover 3 inwall arranges the first spacing shoulder 302, close seat 42 come downwards to locked groove 41 relative with locking key 720 time, the lower end of closedown seat 42 is butted on the first spacing shoulder 302.This structure contributes to lock ring 72 and accurately shrinks, and locking key and locked groove 41 are locked.
Preferred as above-described embodiment, the second locking mechanism 8 comprises:
Second annular inner card cage 82, is circumferentially opened on the inwall of body;
Second annular exterior bayonet slot (Fig. 1 Elastic snap ring 81 present position), is circumferentially opened on the outer wall of closedown cover 3;
Snap ring 81, is assemblied in the second annular exterior bayonet slot;
Before classification and classification time, the second annular inner card cage 82 and the second annular exterior bayonet slot misplace, and snap ring 81 is embedded in the second annular exterior bayonet slot under the effect of body 1 inwall;
After classification, it is relative with the second annular exterior bayonet slot that closedown cover 3 comes downwards to the second annular inner card cage, and snap ring 81 elastic dilatation is stuck in the second annular inner card cage 82 and the second annular exterior bayonet slot simultaneously.Certainly other structures also can be adopted to carry out descending spacing, as the end in body 1 is stretched in lower contact to closedown cover 3.
Preferred as above-described embodiment, see Fig. 1 and Fig. 2, close cover 3 when being positioned at primary importance, the lower end closing cover 3 is positioned at the top of the second annular inner card cage 82.Can load onto interim gasket ring in the second annular inner card cage 82 during assembling, protection sealing ring is injury-free, interim gasket ring can be taken out after finishing assembly.
Preferred as above-described embodiment, classification mechanism 5 comprises closed cover 51 and support set 52, close cover 51 and comprise the larger large footpath section of upper end external diameter and the less path section of lower end external diameter, large footpath section and the slipper seal of closedown cover 3, support set 52 is fixed with closedown cover 3, the upper end of support set 52 is inserted and is closed between cover 3 and the path section of closed cover 51, seals, slipper seal between support set 52 and closed cover 51 between support set 52 and closedown cover 3;
Before classification, close cover 51 and fixed by the second shear pin 53 with support set 52, close cover 51 and close internal classification hole 301 with support set 52;
During classification, closed cover 51 is cut off the second shear pin 53 slide downward and is exposed internal classification hole 301 under hydraulic action, the classification channels open that internal classification hole 301 and outer grading-hole 103 are formed;
The pressure reduction up and down that closed cover 51 produces under hydraulic pressure direct effect is closed cover 51 after cutting off the second shear pin 53 or adopting gravity plug 16 shutoff shown in Fig. 7 to close cover 51 and is cut off the second shear pin 52 under hydraulic action;
When closing cover 51 after adopting the shutoff of gravity plug 16 to close cover 51 and cut off the second shear pin 53 under hydraulic action, the internal diameter that sizing collar closes cover portion 51 is less than the internal diameter that sizing collar closes cover top.Open classification passage by two kinds of modes in the present embodiment, ensure that carrying out smoothly of classification.
Preferred as above-described embodiment, the inwall of closing cover 3 has the second spacing shoulder 303, and the upper end closing cover 51 before classification is butted on the second spacing shoulder 303.Achieve the location to closing cover 51.
As preferably, circumferential rotation-preventing mechanism 9 comprises:
Anti-rotation pin-and-hole 92, radial direction is opened on body 1;
Anti-rotation groove 93, is opened on the outer wall of closedown cover 3 vertically;
Stop pin 91, is assemblied in anti-rotation pin-and-hole 92, and matches with anti-rotation groove 93.Circumferential rotation-preventing mechanism 9 is set and can ensures that internal classification hole 301 is corresponding with outer grading-hole 103, avoid unintentional rotation and cause classification failure.
Preferred as above-described embodiment, is also fixed by holding screw 12 between lower contact 2 and body 1.Enhance the firmness be connected between lower contact 2 with body 1, prevent lower contact 2 in work progress from coming off.
Preferred as above-described embodiment, is plugged with flexible obturating plug 14 in the lower end of lower contact 2, drops into the flexibility shown in Fig. 8 and fill in the flexible obturating plugs 14 of 15 shutoff and can produce bruising in work progress.
Preferred as above-described embodiment, particularly the box thread of body 1 upper end and the male thread of lower contact 2 lower end adopt tightness screw thread to the screw thread of each assembly of the sizing collar of the embodiment of the present invention.Ensure that the sealing effectiveness of sizing collar.
Sealing between each assembly of the sizing collar of the embodiment of the present invention is realized by sealing ring 13, offers seal groove in the appropriate location of each assembly, and assembling sealing ring 13 can realize sealing between each assembly and slipper seal in seal groove.Certainly, the sealing that other seal constructions realize between each assembly can also be adopted.
On the other hand, see Fig. 1 to Fig. 3, embodiments provide a kind of assemble method of Oil/gas Well hermetic seal sizing collar, comprise the steps:
First sealing ring 13 is respectively charged in the seal groove of each assembly of composition sizing collar, sealing surface coating lubricating oil;
In the top loading closedown cover 3 of closedown cover 3, make locked groove 41 relative with the hole clipping of the first annular exterior bayonet slot 73 by closing seat 42, be assemblied in by lock ring 72 in first annular exterior bayonet slot 73, locking key inserts in locked groove 41;
Load from closedown cover 3 lower end and close cover 51 and support set 52, support set 52 is fixed by screw thread with closedown cover 3, close cover 51 to be fixed by the second shear pin 53 with support set 52, closed cover 51 closes internal classification hole 301 with support set 52 makes classification passage keep initial closed state, is assemblied in by snap ring 81 in second annular exterior bayonet slot;
Interim gasket ring is loaded onto in the second annular inner card cage of body 1, the internal face of interim gasket ring flushes with the internal face of body 1, the internal thread of body 1 lower end and escape protective jacket are protected, the closedown cover 3 assembled above is loaded body 1 from body 1 lower end, make the first annular exterior bayonet slot 73 of closedown cover 3 corresponding with the first annular inner card cage 71 of body 1, seat 42 will be closed upwardly with temporary cushion block, now close the inclined-plane 410 on locked groove 41 times edges and the lower inclined plane 721 phase effect of locking key 720 end of seat 42, radial component makes lock ring 72 coincide to the first annular inner card cage 71 of external expansion and body 1, lock ring 72 locks the axial displacement of closing cover 3 and body 1,
The circumferential position of adjustment body 1 and closedown cover 3 makes internal classification hole 301 and outer grading-hole 103 mutually corresponding, stop pin 91 is assemblied in the anti-rotation pin-and-hole 92 of body 1, matched with the anti-rotation groove 93 of closing on cover 3 in the front end of stop pin 91, the circumferential displacement of cover 3 and body 1 is closed in locking;
Closedown seat 42 and closedown cover 3 first shear pin 11 are fixed, seat 42 and the axial displacement of closing cover 3 are closed in locking;
Remove cushion block, gasket ring, protective sleeve, be tightly connected lower contact 2 threaded upper ends body lower end.
The assemble method of the embodiment of the present invention does not destroy hermetically-sealed construction, loads other assemblies from the lower end of body 1, easy to assembly, ensure that good sealing performance.
The using method of the sizing collar of the embodiment of the present invention is as follows:
At the scene the sizing collar two ends of the embodiment of the present invention are connected hermetic seal sleeve pipe, the box thread junction surface of top hermetic seal sleeve pipe and sizing collar upper end forms once sealing, simultaneously form secondary seal between the end face of top airtight sealing sleeve pipe and the annular shoulder 104 of body 1, and annular shoulder 104 controllable shaft is to displacement, avoids screw thread tension generation circumferential stress to concentrate and cause H
2s or CO
2gas attack and rupture failure, such double sealing structure can meet hermetic seal ability;
The sizing collar connecting into tubing string is lowered into design attitude in well, closed cover 51 controls internal classification hole 301 and is in closed condition, carry out one-level cementing after well Inner eycle is normal, fill in 15 in well head input flexibility and be pumped to the formation of flexible obturating plug 14 and close generation bruising, complete first order cementing;
Open internal classification hole 301 and implement second level cementing, wherein as adopted hydraulic way directly to open grading-hole, then directly improve and be pumped to design load, close cover 51 under the effect of upper and lower pressure reduction, to cut off the second shear pin 53 come downwards to and act on mutually with support set 52 upper end, open internal classification hole 301, classification channels open, implements second level cementing; Grading-hole is opened as adopted the mode of throwing in gravity plug 16, then throw in gravity plug 16 at well head and allow its free-falling be formed closed to closing cover 51, improve and be pumped to design load, closed cover 51 is cut off the second shear pin 53 and is got through classification passage under the effect of hydraulic pressure, implements second level cementing;
After completing second level cementing, well head is thrown in shut-off plug 17 and is pumped to closedown seat 42 and formed closed, improve and be pumped to design load, closing seat 42 upper end, to cut off the first shear pin 11 by the thrust of shut-off plug 17 descending, when the locked groove 41 of closing seat 42 outside aims at locking key 720, the outer inclined-plane 722 of lock ring 72 and the inclined-plane on first annular inner card cage 71 times edges of body 1 radial component produced that interacts makes the inside axial lock control removed and close cover 3 of sliding of lock ring 72, closedown seat 42 and closedown cover 3 lock by lock ring 72, close cover 3 and together come downwards to the second place with closedown seat 42, internal classification hole 301 and outer grading-hole 103 misplace, classification pathway closure, snap ring 81 elastic dilatation is stuck in the second annular inner card cage and the second annular exterior bayonet slot simultaneously, the axial displacement of cover 3 and body 1 is closed in locking, sizing collar is kept to be in final plant closure state.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (11)
1. Oil/gas Well hermetic seal sizing collar, is characterized in that, comprising:
Body, described body is body, and the upper end of described body has internal thread and forms link, and lower end has internal thread and forms lower link, and on the tube wall of described body, radial direction has outer grading-hole;
Close cover, be located in described body, and slipper seal between described closedown cover and body, on the tube wall of described closedown cover, radial direction has internal classification hole;
Circumference rotation-preventing mechanism, limits circumferential relative displacement between described closedown cover and described body;
First locking mechanism, for being axially fixed at primary importance by described closedown cover relative to described body;
Second locking mechanism, for being axially fixed at the second place by described closedown cover relative to described body;
Release mechanism, for unlocking the first locking mechanism, makes described cut out cover move vertically;
Classification mechanism, is located in described closedown cover;
Lower contact, is threaded with the lower link of described body, seals between described lower contact and described body, and the lower end of described lower contact has outer connecting thread;
Before classification, described closedown cover is axially fixed at primary importance relative to described body by described first locking mechanism, described internal classification hole is relative with described outer grading-hole, and described classification mechanism closes described internal classification hole, and now described sizing collar is radial inside and outside isolated body;
During classification, described classification mechanism opens internal classification hole under hydraulic action, and described internal classification hole and described outer grading-hole form classification channels open, and described sizing collar is by conducting inside and outside internal classification hole and outer grading-hole;
After classification, described release mechanism unlocks the first locking mechanism under hydraulic action, the second place is moved to vertically under making described closedown be enclosed within hydraulic action, described closedown is overlapped relative to described body axial restraint by described second locking mechanism, now described internal classification hole and described outer grading-hole stagger, described classification pathway closure.
2. Oil/gas Well hermetic seal sizing collar according to claim 1, is characterized in that the inwall on described body below link has annular shoulder, and when described closedown cover is fixed on primary importance, the upper end of described closedown cover is butted on described annular shoulder.
3. Oil/gas Well hermetic seal sizing collar according to claim 1 and 2, is characterized in that, described first locking mechanism comprises:
First annular inner card cage, is circumferentially opened on the inwall of described body;
First annular exterior bayonet slot, be circumferentially opened on described outer wall of closing cover, in described first annular exterior bayonet slot, radial direction offers penetrating hole clipping;
Lock ring, be assemblied in described first annular exterior bayonet slot, described lock ring is split-type or open type, and the internal face of described lock ring has the locking key of radial Chuan Guo the hole clipping extended, and the end of described locking key has lower inclined plane;
Described release mechanism comprises cut out seat, described closedown seat is located in described closedown cover, described closedown seat and described closedown overlap between slipper seal, the excircle of described closedown seat has the locked groove matched with the locking key of described lock ring, the lower edge of described locked groove is the inclined-plane matched with the lower inclined plane of locking key end, and two inclined-planes interact and make described lock ring radial dilatation;
Before classification and classification time, described closedown seat by the first shear pin with described close overlap fix, when inwall below the upper link of described body has annular shoulder, the upper end of described closedown seat is butted on described annular shoulder, locked groove and the described locking key of described closedown seat misplace in the axial direction, described lock ring be stuck under the effect of described closedown seat outer wall simultaneously the first annular inner card cage with make in the first annular exterior bayonet slot described closedown overlap relative in the axial direction with described body fixing;
After classification, by shut-off plug close described closedown seat make described closedown seat under the effect of hydraulic pressure, cut off the first shear pin to slide down to locked groove relative with described locking key, described lock ring is radially contracted in described first annular exterior bayonet slot, remove the locking of closing between cover and body, described locking key is stuck in locked groove, described closedown cover is fixed with described closedown seat, described closedown is moved downward to the second place under being enclosed within the drive of closing seat, and described closedown is overlapped relative to described body axial restraint by described second locking mechanism.
4. Oil/gas Well hermetic seal sizing collar according to claim 3, it is characterized in that, the lower end outside of described lock ring forms outer inclined-plane, the lower groove of the first annular inner card cage of described body is along being the inclined-plane suitable with the outer inclined-plane of lock ring, and under described first annular inner card cage, the inclined-plane on groove edge and the outer inclined-plane of lock ring interact and make described lock ring radial contraction.
5. Oil/gas Well hermetic seal sizing collar according to claim 3, is characterized in that, described closedown cover inwall has the first spacing shoulder, described closedown seat come downwards to locked groove relative with described locking key time, the lower end of described closedown seat is butted on described first spacing shoulder.
6. Oil/gas Well hermetic seal sizing collar according to claim 1 and 2, is characterized in that, described second locking mechanism comprises:
Second annular inner card cage, is circumferentially opened on the inwall of described body;
Second annular exterior bayonet slot, is circumferentially opened on described outer wall of closing cover;
Snap ring, is assemblied in described second annular exterior bayonet slot;
Before classification and classification time, described second annular inner card cage and described second annular exterior bayonet slot misplace, and described snap ring is embedded in described second annular exterior bayonet slot under the effect of described inner body wall;
After classification, it is relative with the second annular exterior bayonet slot that described closedown cover comes downwards to the second annular inner card cage, and described snap ring elastic dilatation is stuck in the second annular inner card cage and the second annular exterior bayonet slot simultaneously.
7. Oil/gas Well hermetic seal sizing collar according to claim 6, is characterized in that, when described closedown cover is positioned at primary importance, the lower end of described closedown cover is positioned at the top of described second annular inner card cage.
8. Oil/gas Well hermetic seal sizing collar according to claim 1 and 2, it is characterized in that, described classification mechanism comprises closes cover and support set, described closed cover comprises the larger large footpath section of upper end external diameter and the less path section of lower end external diameter, described large footpath section and described closedown overlap slipper seal, described support set and described close overlap fixing, the upper end of described support set is inserted between described closedown cover and the path section of described closed cover, described support set and described closedown seal between overlapping, slipper seal between described support set and described closed cover;
Before classification, described closed cover and described support set are fixed by the second shear pin, and described closed cover and described support set close described internal classification hole;
During classification, described close be enclosed within hydraulic action under cut off the second shear pin slide downward and expose internal classification hole, the classification channels open that described internal classification hole and outer grading-hole are formed;
Described close be enclosed within hydraulic pressure direct effect under the pressure reduction up and down that produces cut off the second shear pin or adopt close cover described in the shutoff of gravity plug after under hydraulic action described closed cover cut off the second shear pin;
When after closed cover described in the shutoff of employing gravity plug, under hydraulic action, the second shear pin cut off by described closed cover, the internal diameter that described sizing collar closes cover portion is less than the internal diameter that sizing collar closes cover top.
9. Oil/gas Well hermetic seal sizing collar according to claim 8, is characterized in that, described inwall of closing cover has the second spacing shoulder, and before classification, the upper end of described closed cover is butted on described second spacing shoulder.
10. Oil/gas Well hermetic seal sizing collar according to claim 1 and 2, is characterized in that, described circumferential rotation-preventing mechanism comprises:
Anti-rotation pin-and-hole, radial direction is opened on body;
Anti-rotation groove, is opened on described outer wall of closing cover vertically;
Stop pin, is assemblied in anti-rotation pin-and-hole, and matches with described anti-rotation groove.
The assemble method of 11. Oil/gas Well hermetic seal sizing collars, comprises the steps:
First sealing ring is respectively charged in the seal groove of each assembly of composition sizing collar, sealing surface coating lubricating oil;
In the top loading closedown cover of closedown cover, make locked groove relative with the hole clipping of the first annular exterior bayonet slot by closing seat, be assemblied in by lock ring in the first annular exterior bayonet slot, locking key inserts in locked groove;
Load from closedown cover lower end and close cover and support set, support set overlaps with closedown to be fixed by screw thread, close cover to be fixed by the second shear pin with support set, closed cover closes internal classification hole with support set makes classification passage keep initial closed state, is assemblied in by snap ring in the second annular exterior bayonet slot;
Interim gasket ring is loaded onto in the second annular inner card cage of body, the internal face of interim gasket ring flushes with the internal face of body, the internal thread of body lower end and escape protective jacket are protected, the closedown cover assembled above is loaded body from body lower end, closedown is overlapped first annular exterior bayonet slot is corresponding with the first annular inner card cage of body, seat will be closed upwardly with temporary cushion block, now close the inclined-plane on edge under the locked groove of seat to act on mutually with the lower inclined plane of locking key end, radial component makes lock ring coincide to the first annular inner card cage of external expansion and body, lock rings closes the axial displacement of cover and body,
Adjustment body and the circumferential position of closing cover make internal classification hole and outer grading-hole mutually corresponding, be assemblied in by stop pin in the anti-rotation pin-and-hole of body, make the front end of stop pin and close the anti-rotation groove that puts and match, the circumferential displacement of cover and body is closed in locking;
Closedown seat and closedown are applied mechanically the first shear pin fix, locking is closed seat and is closed the axial displacement of overlapping;
Remove cushion block, gasket ring, protective sleeve, be tightly connected lower contact threaded upper ends body lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850044.3A CN104653149A (en) | 2014-12-31 | 2014-12-31 | Oil-gas well gas-seal stage collar and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850044.3A CN104653149A (en) | 2014-12-31 | 2014-12-31 | Oil-gas well gas-seal stage collar and assembly method thereof |
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| Publication Number | Publication Date |
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| CN104653149A true CN104653149A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410850044.3A Pending CN104653149A (en) | 2014-12-31 | 2014-12-31 | Oil-gas well gas-seal stage collar and assembly method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779566A (en) * | 2019-01-08 | 2019-05-21 | 青岛海蚨奥工贸有限公司 | One kind can bore sizing collar |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174375A (en) * | 1989-10-10 | 1992-12-29 | Union Oil Company Of California | Hydraulic release system |
| CN201162521Y (en) * | 2008-01-12 | 2008-12-10 | 山东赛瓦石油工具服务有限公司 | Double-sealing type graded hoop |
| CN201568013U (en) * | 2009-10-30 | 2010-09-01 | 中国石油化工股份有限公司 | Two-stage cementer free from drilling |
| US8267178B1 (en) * | 2011-09-01 | 2012-09-18 | Team Oil Tools, Lp | Valve for hydraulic fracturing through cement outside casing |
| CN202850941U (en) * | 2012-10-21 | 2013-04-03 | 中国石油集团西部钻探工程有限公司 | Drilling-free-type grading cementing device |
| CN203008849U (en) * | 2012-10-21 | 2013-06-19 | 中国石油集团西部钻探工程有限公司 | Tube external self-sealing stage collar device |
| CN103775025A (en) * | 2014-03-03 | 2014-05-07 | 青岛海蚨奥工贸有限公司 | Classifying hoop |
| CN204492741U (en) * | 2014-12-31 | 2015-07-22 | 天津安东石油机械制造有限公司 | Oil/gas Well hermetic seal sizing collar |
-
2014
- 2014-12-31 CN CN201410850044.3A patent/CN104653149A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174375A (en) * | 1989-10-10 | 1992-12-29 | Union Oil Company Of California | Hydraulic release system |
| CN201162521Y (en) * | 2008-01-12 | 2008-12-10 | 山东赛瓦石油工具服务有限公司 | Double-sealing type graded hoop |
| CN201568013U (en) * | 2009-10-30 | 2010-09-01 | 中国石油化工股份有限公司 | Two-stage cementer free from drilling |
| US8267178B1 (en) * | 2011-09-01 | 2012-09-18 | Team Oil Tools, Lp | Valve for hydraulic fracturing through cement outside casing |
| CN202850941U (en) * | 2012-10-21 | 2013-04-03 | 中国石油集团西部钻探工程有限公司 | Drilling-free-type grading cementing device |
| CN203008849U (en) * | 2012-10-21 | 2013-06-19 | 中国石油集团西部钻探工程有限公司 | Tube external self-sealing stage collar device |
| CN103775025A (en) * | 2014-03-03 | 2014-05-07 | 青岛海蚨奥工贸有限公司 | Classifying hoop |
| CN204492741U (en) * | 2014-12-31 | 2015-07-22 | 天津安东石油机械制造有限公司 | Oil/gas Well hermetic seal sizing collar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779566A (en) * | 2019-01-08 | 2019-05-21 | 青岛海蚨奥工贸有限公司 | One kind can bore sizing collar |
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