CN204703782U - Releasing joint capable of realizing telescopic compensation - Google Patents
Releasing joint capable of realizing telescopic compensation Download PDFInfo
- Publication number
- CN204703782U CN204703782U CN201520360239.XU CN201520360239U CN204703782U CN 204703782 U CN204703782 U CN 204703782U CN 201520360239 U CN201520360239 U CN 201520360239U CN 204703782 U CN204703782 U CN 204703782U
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- China
- Prior art keywords
- joint
- sub
- piston cylinder
- top connection
- lock claw
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Abstract
The utility model provides a releasing joint capable of realizing telescopic compensation, which comprises an upper joint, a steel ball, a shearing pin, a locking claw upper joint, a sliding sleeve, a locking claw lower joint, a coupling, a piston cylinder, a moving limiting ring and a sleeve joint; the upper joint is in threaded connection with the upper end of the upper joint of the locking claw, the lower end of the upper joint of the locking claw is connected with the clamping jaw of the lower joint of the locking claw, the lower end of the lower joint of the locking claw is provided with internal threads and is in external threaded connection with the upper end of a coupling, the lower end of the coupling is in threaded connection with a piston cylinder, a moving limiting ring is fixedly connected to the inner surface of the upper end of a sleeve joint, the moving limiting ring and the sleeve joint are sleeved on the outer surface of the piston cylinder and can slide along the axial direction of the piston cylinder, a sliding sleeve is arranged in the upper joint of. The utility model discloses a separate from top to bottom through hydraulic means realizes the joint of giving up, and simultaneously, this joint of giving up has certain telescopic scope, makes the wriggling in the work progress can be offset to whole tubular column structure, improves the tubular column efficiency of construction.
Description
Technical field
The utility model belongs to oil gas field downhole tool technical field, is specifically related to a kind of back-off sub realizing flexible compensation, a kind of safety device when being Oil/gas Well construction on tubular column structure.
Background technology
In oil (gas) field layer rebuilding construction, conventional tubular column structure from bottom to top: guiding plug, ejector, packer, oil pipe short circuit, back-off sub, oil pipe etc.Stratum reforming technology comprises perforation, builds the pressure, back-up sand, positive backwash etc.In work progress, a large amount of high-pressure fluid containing quartz sand and haydite, carries out perforation, back-up sand operation by the nozzle on spraycan.
In work progress, tubing string produces dilatation under the combined influence of piston effect, bulking effect and helical buckling effect, easily causes string creep.String creep can cause the slippage of packer, and then may cause pressure break inter-zone commununation, or causes the outer packing element fatigue failure of packer.If packer through casing coupling place, also can cause the scuffing of packing element damaged in slipping.
In addition, due to the technique using oil pipe and sleeve pipe to add sand in work progress simultaneously, under the comprehensive function of external force, may there is slide fastener or squeeze serious phenomenon such as ruining in tubing string.
At present, conventional back-off sub can realize the effect of tubing string separation by mechanically actuated or left-hand thread operation or hydraulic way etc.
As Chinese patent CN2739344Y discloses a kind of hydraulic release joint, primarily of top connection, shear screw, central tube, piston, dead bolt, lower contact forms, top connection and central tube, dead bolt all adopts and is threaded, in the annular space of piston between central tube and dead bolt, dead bolt is fixed on piston by shear screw, in piston, top is processed with a conical surface, central tube correspondence position is processed with radial direction through hole, there is interior outer lug boss dead bolt lower end, inner convex platform is corresponding with piston boss, among the female parts outer lug boss of dead bolt being clamp-oned the lower contact be sleeved on dead bolt, dead bolt has boss end to be processed with many symmetrical axial elongated slots.
And for example Chinese patent CN202866673U discloses a kind of jack catchs type back-off sub, this jack catchs type back-off sub comprises top connection, top connection bottom cover has overcoat, top connection is built with sliding sleeve and by the connection of disengagement pin, top connection lower end is connected with stop collar by internal thread, boss is had in stop collar, top connection is connected with elastic claw by external screw thread, elastic claw lower end inner surface has boss external surface to have boss, boss is embedded in the groove of middle part inner surface of overcoat, sliding sleeve lower end is connected with fixed cover by external screw thread, fixed cover lower end external surface has boss, overcoat lower end is connected with lower contact by external screw thread.
Although above-mentioned back-off sub solves some problem existed when tubing string is separated in work progress, existing back-off sub cannot be offset tubing string and be wriggled in work progress, and existence cannot increase the packer life-span, improves the defect of efficiency of construction.
Utility model content
The purpose of this utility model overcomes existing back-off sub can not offset tubing string and occur wriggle and make the problem that packer life-span and efficiency of construction reduce in work progress.
For this reason, the utility model provides a kind of back-off sub realizing flexible compensation, comprises top connection, steel ball, shear pin, lock claw top connection, sliding sleeve, lock claw lower contact, box cupling, piston cylinder, travelling spacing ring and muff joint, described top connection is connected with lock claw top connection threaded upper ends, described lock claw top connection lower end is connected with lock claw lower contact claw, described lock claw lower contact lower end is provided with internal thread and is connected with box cupling upper external screw thread, described box cupling lower end is threaded with piston cylinder, described travelling spacing ring is fixedly connected on muff joint upper end inner surface, described travelling spacing ring and muff joint are placed on piston cylinder external surface, and travelling spacing ring and muff joint can slide axially along piston cylinder, described sliding sleeve is placed in lock claw top connection, sliding sleeve upper end is locked by shear pin, described steel ball is placed in sliding sleeve.
Above-mentioned travelling spacing ring and muff joint along piston cylinder in axial sliding scope be not less than 400mm.
Above-mentioned piston cylinder maximum outside diameter place is provided with multiple sealing ring.
The rigid body tensile strength of above-mentioned back-off sub is greater than 800KN.
The withstand voltage of above-mentioned back-off sub is more than or equal to 70MPa.
Be threaded between above-mentioned travelling spacing ring and muff joint.
The beneficial effects of the utility model: this back-off sub realizing flexible compensation that the utility model provides realizes back-off sub by hydraulic way and is separated up and down, this back-off sub simultaneously has certain telescopic extensions, integral tube rod structure is enable to offset wriggling in work progress, reduce packer radial slippage, increase packer outer packing element application life, improve tubing string efficiency of construction.
Below with reference to accompanying drawing, the utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model can realize the back-off sub of flexible compensation.
Description of reference numerals: 1, top connection; 2, steel ball; 3, shear pin; 4, lock claw top connection; 5, sliding sleeve; 6, lock claw lower contact; 7, box cupling; 8, piston cylinder; 9, travelling spacing ring; 10, muff joint.
Detailed description of the invention
Embodiment 1:
Tubing string can not be offset occur to wriggle to overcome existing back-off sub in work progress and make the problem that packer life-span and efficiency of construction reduce, present embodiments provide a kind of back-off sub of realized flexible compensation as shown in Figure 1, comprise top connection 1, steel ball 2, shear pin 3, lock claw top connection 4, sliding sleeve 5, lock claw lower contact 6, box cupling 7, piston cylinder 8, travelling spacing ring 9 and muff joint 10, described top connection 1 is connected with lock claw top connection 4 threaded upper ends, described lock claw top connection 4 lower end is connected with lock claw lower contact 6 claw, described lock claw lower contact 6 lower end is provided with internal thread and is connected with box cupling 7 upper external screw thread, described box cupling 7 lower end is threaded with piston cylinder 8, described travelling spacing ring 9 is fixedly connected on muff joint 10 upper end inner surface, described travelling spacing ring 9 and muff joint 10 are placed on piston cylinder 8 external surface, and travelling spacing ring 9 and muff joint 10 can slide axially along piston cylinder 8, described sliding sleeve 5 is placed in lock claw top connection 4, sliding sleeve 5 upper end is locked by shear pin 3, described steel ball 2 is placed in sliding sleeve 5.
This back-off sub realizing flexible compensation that this utility model provides realizes back-off sub by hydraulic way and is separated up and down, the travelling spacing ring 9 of this back-off sub simultaneously and muff joint 10 can slide axially along piston cylinder 8, there is certain telescopic extensions, this makes integral tube rod structure can offset wriggling in work progress, reduce packer radial slippage, increase packer outer packing element application life, improve tubing string efficiency of construction.
Embodiment 2:
A kind of back-off sub realizing flexible compensation that the present embodiment provides, comprises top connection 1, steel ball 2, shear pin 3, lock claw top connection 4, sliding sleeve 5, lock claw lower contact 6, box cupling 7, piston cylinder 8, travelling spacing ring 9 and muff joint 10, described top connection 1 is connected with lock claw top connection 4 threaded upper ends, described lock claw top connection 4 lower end is connected with lock claw lower contact 6 claw, described lock claw lower contact 6 lower end is provided with internal thread and is connected with box cupling 7 upper external screw thread, described box cupling 7 lower end is threaded with piston cylinder 8, described travelling spacing ring 9 is fixedly connected on muff joint 10 upper end inner surface, move about and be threaded between spacing ring 9 and muff joint 10, described travelling spacing ring 9 and muff joint 10 are placed on piston cylinder 8 external surface, and travelling spacing ring 9 and muff joint 10 can slide axially along piston cylinder 8, travelling spacing ring 9 and muff joint 10 along piston cylinder 8 in axial sliding scope be not less than 400mm, described piston cylinder 8 maximum outside diameter place is provided with multiple sealing ring, described sliding sleeve 5 is placed in lock claw top connection 4, sliding sleeve 5 upper end is locked by shear pin 3, described steel ball 2 is placed in sliding sleeve 5.
In addition, this rigid body tensile strength realizing the back-off sub of flexible compensation that the utility model provides is greater than 800KN, is withstand voltagely more than or equal to 70MPa.
In sum, this back-off sub realizing flexible compensation that the utility model provides realizes back-off sub by hydraulic way and is separated up and down, and meanwhile, this back-off sub has certain telescopic scope, enable integral tube rod structure offset wriggling in work progress, improve tubing string efficiency of construction.
More than exemplifying is only illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, everyly all belongs within protection domain of the present utility model with the same or analogous design of the utility model.
Claims (6)
1. can realize a back-off sub for flexible compensation, it is characterized in that: comprise top connection (1), steel ball (2), shear pin (3), lock claw top connection (4), sliding sleeve (5), lock claw lower contact (6), box cupling (7), piston cylinder (8), travelling spacing ring (9) and muff joint (10), described top connection (1) is connected with lock claw top connection (4) threaded upper ends, described lock claw top connection (4) lower end is connected with lock claw lower contact (6) claw, described lock claw lower contact (6) lower end is provided with internal thread and is connected with box cupling (7) upper external screw thread, described box cupling (7) lower end is threaded with piston cylinder (8), described travelling spacing ring (9) is fixedly connected on muff joint (10) upper end inner surface, described travelling spacing ring (9) and muff joint (10) are placed on piston cylinder (8) external surface, and travelling spacing ring (9) and muff joint (10) can slide axially along piston cylinder (8), described sliding sleeve (5) is placed in lock claw top connection (4), sliding sleeve (5) upper end is locked by shear pin (3), described steel ball (2) is placed in sliding sleeve (5).
2. can realize the back-off sub of flexible compensation as claimed in claim 1, it is characterized in that: described travelling spacing ring (9) and muff joint (10) along piston cylinder (8) in axial sliding scope be not less than 400mm.
3. can realize the back-off sub of flexible compensation as claimed in claim 1, it is characterized in that: described piston cylinder (8) maximum outside diameter place is provided with multiple sealing ring.
4. can realize the back-off sub of flexible compensation as claimed in claim 1, it is characterized in that: the rigid body tensile strength of described back-off sub is greater than 800KN.
5. can realize the back-off sub of flexible compensation as claimed in claim 1, it is characterized in that: the withstand voltage of described back-off sub is more than or equal to 70MPa.
6. can realize the back-off sub of flexible compensation as claimed in claim 1, it is characterized in that: be threaded between described travelling spacing ring (9) and muff joint (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520360239.XU CN204703782U (en) | 2015-05-29 | 2015-05-29 | Releasing joint capable of realizing telescopic compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520360239.XU CN204703782U (en) | 2015-05-29 | 2015-05-29 | Releasing joint capable of realizing telescopic compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204703782U true CN204703782U (en) | 2015-10-14 |
Family
ID=54283407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520360239.XU Expired - Fee Related CN204703782U (en) | 2015-05-29 | 2015-05-29 | Releasing joint capable of realizing telescopic compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204703782U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879069A (en) * | 2015-05-29 | 2015-09-02 | 中国石油天然气股份有限公司 | Releasing joint capable of realizing telescopic compensation |
| CN108843269A (en) * | 2018-06-29 | 2018-11-20 | 门雨晴 | A kind of easy assembling type combination packing element bridge plug |
| CN113944434A (en) * | 2021-10-28 | 2022-01-18 | 大庆市润百利科技有限公司 | A pressure-resistant safety short circuit |
-
2015
- 2015-05-29 CN CN201520360239.XU patent/CN204703782U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879069A (en) * | 2015-05-29 | 2015-09-02 | 中国石油天然气股份有限公司 | Releasing joint capable of realizing telescopic compensation |
| CN108843269A (en) * | 2018-06-29 | 2018-11-20 | 门雨晴 | A kind of easy assembling type combination packing element bridge plug |
| CN113944434A (en) * | 2021-10-28 | 2022-01-18 | 大庆市润百利科技有限公司 | A pressure-resistant safety short circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |