CN202348147U - Sealing connecting structure for casing head and casing pipe - Google Patents
Sealing connecting structure for casing head and casing pipe Download PDFInfo
- Publication number
- CN202348147U CN202348147U CN2011204260141U CN201120426014U CN202348147U CN 202348147 U CN202348147 U CN 202348147U CN 2011204260141 U CN2011204260141 U CN 2011204260141U CN 201120426014 U CN201120426014 U CN 201120426014U CN 202348147 U CN202348147 U CN 202348147U
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- Prior art keywords
- casing head
- casing
- ring
- head
- sleeve pipe
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- Expired - Lifetime
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Abstract
The utility model discloses a sealing connecting structure for a casing head and a casing pipe, which comprises the casing head and the casing pipe, wherein the top of the casing pipe is inserted into a central through hole of the casing head for a distance; an annular space is formed by a tail part of the central through hole of the casing head and a neck part of the casing pipe; a sealing ring, an upper piston, a lower piston, a slip assembly and a fixing ring are arranged in the annular space in sequence from top to bottom; the slip assembly is assembled on the fixing ring; the fixing ring is in threaded connection with the casing head; a jackscrew and a pressure injecting valve are arranged on a side wall of the casing head; a locking annular petal is connected with an inner end of the jackscrew; and the locking annular petal is corresponding to the position between the upper piston and the lower piston. The sealing connecting structure is used for realizing the sealing connection of the casing head and the casing pipe in a moveable manner; the defects caused by traditional threaded connection and welding are fully overcome by the sealing connecting structure; and the sealing connecting structure has the characteristics of convenience in constructing, safety, reliability, excellent sealing property, high mechanical strength, convenience in transporting and maintaining, suitable for onsite operation, time-saving and labor-saving property, strong practicability, and the like.
Description
Technical field
The utility model relates to the wellhead equipment of oil gas drilling, specifically is a kind of casing head and bobbin seal syndeton.
Background technology
At present, the well head casing head of oil gas drilling is threaded with the connected mode of sleeve pipe and welds two kinds.
Wherein, being threaded is on casing head and sleeve pipe, to process corresponding screw thread respectively, then both is connected.The major defect of this connected mode is: 1. after the screwed with both, the direction of casing head can't be confirmed on demand; 2. being threaded needs to consider the height and position of last casing coupling, in case the stratum landslide causes sleeve pipe to be stuck, the casing threads position can't navigate to the height and position of reservation, and both can't realize connecting; 3. in installation and transportation, the screw thread on casing head and the sleeve pipe damages easily, causes can't realize connecting, even if realize reluctantly connecting, both sealings are unreliable.
Be welded to connect is that casing head and sleeve pipe are directly welded together.The major defect of this connected mode is: should not weld (spark that welding produces causes a significant threat safety in production) at oil gas drilling scene 1.; After welding away from other on-the-spot place of oil gas drilling; Casing head and sleeve pipe are on-dismountable; Bring inconvenience to hauling operation, the maintenance cost in the use is high; 2. welding need be heat-treated the functional performance and the mechanical strength of heat treatment meeting remote-effects casing head and sleeve pipe respectively with postwelding before weldering; 3. casing head and sleeve pipe generally are to adopt unlike material to be made, and are prone to during welding produce the crack, have especially more increased the welding difficulty in winter or cold district.
Summary of the invention
The purpose of the utility model is: to the deficiency of above-mentioned prior art, a kind of easy construction, safe and reliable, good airproof performance are provided, are convenient to keep in repair, the casing head and the bobbin seal syndeton of suitable execute-in-place.
The technical scheme that the utility model adopts is: a kind of casing head and bobbin seal syndeton; Comprise casing head and sleeve pipe; The top of said sleeve pipe puts in a segment distance in the casing head central through hole, and the central through hole afterbody of said casing head and the neck of sleeve pipe form annular space, are provided with joint ring, upper piston, lower piston, slip assemblies and retainer ring in this annular space from top to bottom successively; Said slip assemblies is assemblied on the retainer ring, and retainer ring is threaded with casing head; On the sidewall of casing head, be provided with jackscrew and press valve with annotating, the inner of jackscrew is connected with the binding ring lobe, and this binding ring lobe is corresponding with the position between the upper and lower piston.
The sidewall of said casing head is provided with the pressure testing valve of test annular space internal pressure.
Said binding ring lobe is a taper surface in the end face of sleeve pipe in opposite directions; Outer on said upper piston and the lower piston forward surface is the inclined-plane, and the taper surface of this inclined-plane and binding ring lobe is suitable.
Said slip assemblies is assemblied on the retainer ring with shear pin.
Said retainer ring is connected with trapezoidal thread with casing head.
Said joint ring is a metallic packing ring.
The afterbody of said retainer ring has annular boss, and this annular boss is located at the bottom of casing head.
The beneficial effect of the utility model is: casing head and sleeve pipe are realized being tightly connected with manner; Overcome the defective that conventional threads connects and welding is produced fully, it have easy construction, safe and reliable, good airproof performance, mechanical strength high, be convenient to transportation and maintenance, suitable execute-in-place, characteristics such as time saving and energy saving and practical.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a kind of structural representation (the figure left side is the state of being activated that is tightly connected, and the figure right side is the state of not being activated that is tightly connected) of the utility model.
Fig. 2 is 1 A-A view.(the figure left side is the state of being activated that is tightly connected, and the figure right side is the state of not being activated that is tightly connected).
Fig. 3 is the plan structure sketch map of the utility model parts-binding ring lobe.
Fig. 4 is the left view of Fig. 3.
Code name implication among the figure: 1-retainer ring; 2-slip assemblies; 3-shear pin; 4-lower piston; 5-jackscrew; 6-binding ring lobe; 7-upper piston; 8-pressure testing valve; 9-joint ring; 10-casing head; 11-annotate and press valve; 12-sleeve pipe.
The specific embodiment
Referring to Fig. 1 to 4: the utility model comprises casing head 10 and sleeve pipe 12, and the top of sleeve pipe 12 puts in a segment distance in casing head 10 central through holes, the central through hole afterbody of casing head 10 and the neck of sleeve pipe 12 formation annular space.An aforesaid segment distance is confirmed its length according to concrete the application, should be greater than the height of annular space.
In the annular space of casing head and sleeve pipe formation, be provided with joint ring 9, upper piston 7, lower piston 4, slip assemblies 2 and retainer ring 1 from top to bottom successively.Wherein, joint ring 9 is the metallic packing ring of interior pressure self-tightening type; The upper end of the lower end of upper piston 7 and lower piston 4 overlaps each other, and with O RunddichtringO formation sealing, upper and lower piston forms sealing through O RunddichtringO and casing head 10 respectively, and the outer on upper piston 7 and lower piston 4 forward surfaces is the inclined-plane; On the casing head 10 of position between corresponding upper piston 7 and the lower piston 4, be provided with than large space; Be respectively equipped with two jackscrews 5 and two notes pressure valves 11 on casing head 10 sidewalls herein; Be connected with binding ring lobe 6 in the inner of each jackscrew 5; Binding ring lobe 6 is corresponding with the position between the upper and lower piston, and binding ring lobe 6 is a taper surface in the end face of sleeve pipe 12 in opposite directions, and the inclined-plane of this taper surface and upper and lower piston is suitable; Slip assemblies 2 is assemblied on the retainer ring 1 with shear pin 3, and retainer ring 1 forms with trapezoidal thread with casing head 10 and is threaded, and the afterbody of retainer ring 1 has annular boss, and this annular boss is located at casing head 10 bottoms; On the sidewall of casing head 10, also be provided with pressure testing valve 8 as test annular space internal pressure.
Above-mentioned jackscrew 5 is decided according to concrete designing requirement with the quantity of annotating pressure valve 11, and jackscrew 5 quantity usually should be less than two.In addition, jackscrew 5 presses valve 11 to be arranged on the casing head 10 with radial manner with annotating, and jackscrew 5 presses valve 11 to be on the same circumference of casing head 10 with annotating.
The course of work of the utility model is: when casing head 10 and sleeve pipe 12 are tightly connected, metallic packing ring 9, upper piston 7, lower piston 4, slip assemblies 2 and retainer ring 1 are connected on the casing head 10; Sleeve pipe 12 is nested into predeterminated position; Press valve 11 in annular space, to annotate pressure through annotating, under hydraulic action, lower piston 4 is descending; Upper piston 7 is up, and lower piston 4 descending acting on the slip assemblies 2 are cut off shear pin 3; Make slip assemblies 2 chucking sleeve pipes 12, thereby realize activating slip assemblies 2, upper piston 7 up acting on the metallic packing ring 9; Make metallic packing ring 9 on the inclined-plane, slide, inwardly with outwards move respectively, thus the annular space between Sealed casing pipe 12 and the casing head 10; With the pressure in the pressure testing valve 8 test annular spaces; In case reach sealing effectiveness, advance binding ring lobe 6 inwardly to advance with jackscrew 5, binding ring lobe 6 is stuck between upper piston 7 and the lower piston 4; With upper piston 7 and lower piston 4 lockings, thereby realize being tightly connected of casing head 10 and sleeve pipe 12.When casing head 10 is dismantled with sleeve pipe 12, only need that binding ring lobe 6 is withdrawed from locked position and get final product.
The utility model utilizes hydraulic pressure to realize activating slip assemblies and metallic packing ring; Forming casing head is connected with bobbin seal; Adopt the binding ring lobe that upper and lower piston is locked simultaneously; Replace hydraulic pressure to realize activating slip assemblies and metallic packing ring, continue to form casing head and be connected, be connected inefficacy with bobbin seal in case reveal the casing head that causes because of hydraulic pressure with bobbin seal.
Claims (7)
1. casing head and bobbin seal syndeton; Comprise casing head (10) and sleeve pipe (12); The top of said sleeve pipe (12) puts in a segment distance in casing head (10) central through hole; It is characterized in that: the neck of the central through hole afterbody of said casing head (10) and sleeve pipe (12) forms annular space; Be provided with joint ring (9), upper piston (7), lower piston (4), slip assemblies (2) and retainer ring (1) in this annular space from top to bottom successively, said slip assemblies (2) is assemblied on the retainer ring (1), and retainer ring (1) is threaded with casing head (10); On the sidewall of casing head (10), be provided with jackscrew (5) and annotate pressure valve (11), the inner of jackscrew (5) is connected with binding ring lobe (6), and this binding ring lobe (6) is corresponding with the position between the upper and lower piston.
2. according to said casing head of claim 1 and bobbin seal syndeton, it is characterized in that: the sidewall of said casing head (10) is provided with the pressure testing valve (8) of test annular space internal pressure.
3. according to said casing head of claim 1 and bobbin seal syndeton, it is characterized in that: said binding ring lobe (6) is a taper surface in the end face of sleeve pipe (12) in opposite directions; Outer on said upper piston (7) and lower piston (4) forward surface is the inclined-plane, and the taper surface of this inclined-plane and binding ring lobe (6) is suitable.
4. according to said casing head of claim 1 and bobbin seal syndeton, it is characterized in that: said slip assemblies (2) is assemblied on the retainer ring (1) with shear pin (3).
5. according to said casing head of claim 1 and bobbin seal syndeton, it is characterized in that: said retainer ring (1) is connected with trapezoidal thread with casing head (10).
6. according to said casing head of claim 1 and bobbin seal syndeton, it is characterized in that: said joint ring (9) is a metallic packing ring.
7. according to said casing head of claim 1 and bobbin seal syndeton, it is characterized in that: the afterbody of said retainer ring (1) has annular boss, and this annular boss is located at the bottom of casing head (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204260141U CN202348147U (en) | 2011-11-01 | 2011-11-01 | Sealing connecting structure for casing head and casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204260141U CN202348147U (en) | 2011-11-01 | 2011-11-01 | Sealing connecting structure for casing head and casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348147U true CN202348147U (en) | 2012-07-25 |
Family
ID=46537156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204260141U Expired - Lifetime CN202348147U (en) | 2011-11-01 | 2011-11-01 | Sealing connecting structure for casing head and casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348147U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587281A (en) * | 2016-01-28 | 2016-05-18 | 太仓市高泰机械有限公司 | Threaded rod locking-adjustable casing head |
| CN107288554A (en) * | 2017-08-02 | 2017-10-24 | 中国石油大学胜利学院 | A kind of novel continuous oil pipe counter-sunk screw connector and application method |
| CN107529582A (en) * | 2017-09-29 | 2018-01-02 | 杰瑞能源服务有限公司 | A kind of well head hydraulic quick connecting device and construction technology |
-
2011
- 2011-11-01 CN CN2011204260141U patent/CN202348147U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587281A (en) * | 2016-01-28 | 2016-05-18 | 太仓市高泰机械有限公司 | Threaded rod locking-adjustable casing head |
| CN105587281B (en) * | 2016-01-28 | 2018-11-20 | 太仓市高泰机械有限公司 | A kind of screw thread lever lock adjustable sleeve head |
| CN107288554A (en) * | 2017-08-02 | 2017-10-24 | 中国石油大学胜利学院 | A kind of novel continuous oil pipe counter-sunk screw connector and application method |
| CN107288554B (en) * | 2017-08-02 | 2023-06-30 | 山东石油化工学院 | Novel coiled tubing countersunk screw connector and use method |
| CN107529582A (en) * | 2017-09-29 | 2018-01-02 | 杰瑞能源服务有限公司 | A kind of well head hydraulic quick connecting device and construction technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |