CN201723196U - Self-sealing setting ball seat - Google Patents
Self-sealing setting ball seat Download PDFInfo
- Publication number
- CN201723196U CN201723196U CN2010202461283U CN201020246128U CN201723196U CN 201723196 U CN201723196 U CN 201723196U CN 2010202461283 U CN2010202461283 U CN 2010202461283U CN 201020246128 U CN201020246128 U CN 201020246128U CN 201723196 U CN201723196 U CN 201723196U
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- China
- Prior art keywords
- sealing
- self
- big envelope
- ball seat
- tube sealing
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- Expired - Fee Related
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Abstract
The utility model relates to the manufacturing technique field of underground packer tool of petroleum and gas industry. The utility model adopts the double-sided plugging design, provides a self-sealing setting ball seat which can realize the double-sided (forward and reverse) plugging of underground packer pipe column, and comprises a self-sealing mechanism and a shell mechanism. A self-sealing pipe of the self-sealing mechanism is arranged in the self-sealing jacket; four side holes are distributed in corresponding positions of self-sealing pipe and self-sealing jacket; a shell body of the shell mechanism is connected with a joint through screw threads. The self-sealing setting ball seat resolves the problem of forward plugging only in the prior art, and has the characteristics of realizing forward and reverse plugging in construction in high-pressure petroleum and gas well.
Description
Technical field
A kind of self-sealing setting ball seat is used for volume increase or completion practice after petroleum and natural gas well bores completion, relates to the manufacturing technology field of industrial gas oil downhole packer instrument.
Background technology
In petroleum and natural gas well volume increase or completion practice, need be lowered to the tubing string that has one or more packers, and make packer setting, so that needing the well section of operation and the well section that does not need operation to separate; Make packer setting that multiple mode be arranged, setting the higher oil gas well of pressure when using packer, setting ball seat is a most common form, when adopting this mode to set, need be installed in the position below the packer in the tubing string to setting ball seat; For the well that adopts disposable tubing string construction, after the packer tubing string is lowered into the design well depth, replace out the well killing fluid in the well, drop into setting ball then, setting ball is placed on the setting ball seat, and forward blocks the circulation port on the setting ball seat then, and suppress to pipe in by well head this moment, make packer setting, just can carry out construction operation then; For adopting drilling rod to send the packer tubing string to design attitude, and with after the packer tubing string separates, use the well of tubing string tieback packer tubing string construction again, this method is also referred to as the well that adopts the construction of secondary tubing string usually, for the well that adopts the construction of secondary tubing string, from drilling rod be separated to tubing string tieback upper packer tubing string during this period of time in, because the well killing fluid of higher density is replaced out by more low-density completion fluid, the pipe internal pressure is lower than the outer formation fluid pressure of pipe, the hydrocarbon fluids on stratum will flow out, enter by the circulation port on the setting ball seat again and arrive well head in the upper tube, thereby complex situations such as well kick or blowout take place; When this thing happens, not only require setting ball seat energy forward shutoff circulation port, also want oppositely shutoff circulation port; At present, setting ball seat only has the function of forward shutoff both at home and abroad, realize setting of packer, and do not possess the function of reverse shutoff, therefore when the complex situations of well kick or blowout take place, prior art can not realize the ability of reverse shutoff, and it is very dangerous that such situation is constructed at high-pressure oil-gas well.
The utility model content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, to adopt the design of two-way shutoff, a kind of self-sealing setting ball seat that can realize positive and negative two-way plugged well lower packet tubing string being provided.
The utility model is achieved in that the utility model comprises self-styled mechanism and shell mechanism, it is characterized in that: described self-styled mechanism comprises from tube sealing 5, from big envelope 6 and stop collar 10, be arranged in big envelope 6 from tube sealing 5, be provided with lock ring groove 13 in bottom from tube sealing 5, afterbody from tube sealing 5 is equipped with lock ring 9, from tube sealing 5 be evenly equipped with four side openings 12 respectively from big envelope 6 corresponding positions; Shell mechanism comprises housing 8 and joint 1, and housing 8 and joint 1 are connected with the internal thread of joint 1 from the upper end of big envelope 6 by being threaded, from big envelope 6 lower ends and stop collar 10 by being threaded;
Described lock ring groove 13 upper surfaces are the conical surface, lower surface and axis normal;
Described from tube sealing 5 and fixing by shear pin 2 from big envelope 6;
Be provided with sealing ring 7 from big envelope 6 and between tube sealing 5, in big envelope 6 and joint 1, be provided with sealing ring 3 between the circle;
In joint 1 screw thread lower end cylindrical and housing 8 upper ends, be provided with sealing ring 4 between the circle;
During work, under the promotion of ground pressure, move downward from tube sealing 5, lock ring 9 is motionless, when move downward from tube sealing 5 put in place after, lock ring 9 enters in the lock ring groove 13, pinning is from tube sealing 5, makes it can not be to top offset, simultaneously, be arranged on stop collar 10, play restriction from the effect of tube sealing 5 to bottom offset from tube sealing 5 bottoms; Between big envelope 6 and housing 8, annular space is arranged, for circulation provides passage for liquid; When setting ball is seated at from tube sealing 5 upper port and seals, to suppress in pipe from well head, the above pipe of setting ball seat internal pressure just is higher than the pipe external pressure, realizes setting of packer; In packer setting, because setting ball blocks the endoporus from tube sealing 5, when in pipe, suppressing from well head, be higher than bottom pressure from tube sealing 5 upper pressure, cut off shear pin 2, from tube sealing 5 to descending operation, when sealing ring 7 is descending cross side opening 12 after, side opening 12 just is plugged, lock ring groove 13 also overlaps with lock ring 9 positions simultaneously, pins from tube sealing 5, and do not have passage UNICOM inside and outside the setting ball seat this moment again, realize the purpose of forward and reverse shutoff tubing string, reached the purpose of complex situations such as preventing well kick or blowout.
Advantage of the present utility model and beneficial effect are: the utility model setting from tube sealing 5 when setting ball is seated at its upper port and seals, can forward shutoff from the endoporus of tube sealing 5, realize setting of packer; In packer setting, because setting ball blocks the endoporus from tube sealing 5, cut off shear pin 2 to descending operation from tube sealing 5, can block side opening 12, realize the purpose of reverse shutoff tubing string, reach the purpose of complex situations such as preventing well kick or blowout.
Description of drawings
Fig. 1 is a cross-sectional view of the present utility model.
The specific embodiment
Provide embodiment of the present utility model below in conjunction with accompanying drawing:
Embodiment 1:
The utility model comprises self-styled mechanism and shell mechanism, self-styled mechanism comprises from tube sealing 5, from big envelope 6 and stop collar 10, be arranged in big envelope 6 from tube sealing 5, be fixed in big envelope 6 by shear pin 2 from tube sealing 5, in order to provide passage for liquid for circulation, be evenly equipped with four side openings 12 respectively from tube sealing 5 with from big envelope 6 corresponding positions, between big envelope 6 and housing 8, be provided with annular space, be provided with lock ring groove 13 in bottom from tube sealing 5, at afterbody lock ring 9 is housed from tube sealing 5, lock ring groove 13 upper surfaces are the conical surface, lower surface and axis normal, by being threaded, described upper end from big envelope 6 is connected with the internal thread of the joint 1 of shell mechanism from big envelope 6 lower ends and stop collar 10; Shell mechanism comprises housing 8 and joint 1, and housing 8 and joint 1 are by being threaded; For the purpose that seals, be provided with sealing ring 7 from big envelope 6 and between tube sealing 5, in big envelope 6 and joint 1, be provided with sealing ring 3 between the circle, in joint screw thread lower end cylindrical and housing 8 upper ends, be provided with sealing ring 4 between the circle;
Embodiment 2:
Erection sequence of the present utility model is: the upper end from big envelope 6 is installed in top connection 1 inside by screw thread, and circle and the cylindrical of top connection 1 are by being threaded in the upper end of housing 8, and housing 8 inner installations are from big envelope 6; Install from tube sealing 5 from big envelope 6 is inner, from tube sealing 5 by shear pin 2 be fixed together from big envelope 6, be distributed on from tube sealing 5 and during from four side openings in big envelope 6 stage casings, side opening aimed at and be installed in installation, just can reach the purpose of circulation canal; Be provided with lock ring groove 13 from tube sealing 5, the bottom is equipped with lock ring 9, will be threaded with stop collar 10 from big envelope 6 lower ends then; For the purpose that seals, sealing ring 3,4,7 is installed in respectively in big envelope 6, joint 1 and the seal groove on tube sealing 5.
Embodiment 3:
During construction, other instrument that needs such as the utility model and packer is sequentially connected on the operating tool string by the design tubing string, down behind the design well depth, pump in the well head pipe with completion fluid, well killing fluid enters from the endoporus from tube sealing 5 tops in the pipe, again by be arranged on from tube sealing 5 and from big envelope 6 relevant positions and four uniform side openings 12 enter annular space between big envelope 6 and housing 8, set up from replacing the well killing fluid circulation canal in the lower tube in the setting ball seat upper tube; Well killing fluid in having replaced pipe, in the time of need setting downhole packer,, a blocking is sitting on the ball seat 11 with the setting ball input, continue to increase pressure then, when making pressure rise to certain value, shear pin 2 is cut off, after shear pin 2 is cut off, lose the support of shear pin 2 from tube sealing 5, will under the promotion of pressure, move downward, in the downward motion process of tube sealing 5, because lock ring 9 is withstood by the stop collar upper surface of its lower end, therefore be irremovable, so lock ring 9 can enter in the lock ring groove 13, pin from tube sealing 5, making can not be to top offset from tube sealing 5, simultaneously, arrive the bottom of stop collar 10 from the bottom of tube sealing 5, and limit its downward displacement by stop collar 10; When tube sealing 5 moves down, be arranged on the bottom that can move to side opening 12 from the sealing ring 7 of tube sealing 5 cylindricals from the top of side opening 12, simultaneously, because from tube sealing 5 and relative displacement from big envelope 6, the side opening 12 that makes original corresponding setting is correspondence no longer, therefore, sealed the passage that leads to annular space between big envelope 6 and housing 8, reached the purpose of sealing side opening 12, at this moment, the utility model has just been finished the purpose of shutoff.
Claims (5)
1. self-sealing setting ball seat, comprise self-styled mechanism and shell mechanism, it is characterized in that: described self-styled mechanism comprises from tube sealing, from big envelope and stop collar, be arranged in big envelope from tube sealing, be provided with the lock ring groove in bottom from tube sealing, afterbody from tube sealing is equipped with lock ring, from tube sealing be evenly equipped with four side openings respectively from the corresponding position of big envelope; Shell mechanism comprises housing and joint, and housing and joint are connected with the internal thread of joint from the upper end of big envelope by being threaded, from big envelope lower end and stop collar by being threaded.
2. self-sealing setting ball seat according to claim 1 is characterized in that: described lock ring groove upper surface is the conical surface, lower surface and axis normal.
3. self-sealing setting ball seat according to claim 1 is characterized in that: described from tube sealing with fix by shear pin from big envelope.
4. self-sealing setting ball seat according to claim 1 is characterized in that: at the described sealing ring that is provided with from big envelope and between tube sealing, be provided with sealing ring between the circle in big envelope and joint.
5. self-sealing setting ball seat according to claim 1 is characterized in that: be provided with sealing ring between the circle in joint screw thread lower end cylindrical and housing upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202461283U CN201723196U (en) | 2010-07-02 | 2010-07-02 | Self-sealing setting ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202461283U CN201723196U (en) | 2010-07-02 | 2010-07-02 | Self-sealing setting ball seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723196U true CN201723196U (en) | 2011-01-26 |
Family
ID=43491515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202461283U Expired - Fee Related CN201723196U (en) | 2010-07-02 | 2010-07-02 | Self-sealing setting ball seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723196U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881142A (en) * | 2010-07-02 | 2010-11-10 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Self-sealing setting ball seat |
| CN103306636A (en) * | 2012-03-15 | 2013-09-18 | 中国石油化工股份有限公司 | Well completion tube string and cementing method |
| CN105019864A (en) * | 2014-06-06 | 2015-11-04 | 中国海洋石油总公司 | Shock resistant pressure bearing device |
-
2010
- 2010-07-02 CN CN2010202461283U patent/CN201723196U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881142A (en) * | 2010-07-02 | 2010-11-10 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Self-sealing setting ball seat |
| CN103306636A (en) * | 2012-03-15 | 2013-09-18 | 中国石油化工股份有限公司 | Well completion tube string and cementing method |
| CN103306636B (en) * | 2012-03-15 | 2015-12-09 | 中国石油化工股份有限公司 | A kind of completion tubular string and cemented method |
| CN105019864A (en) * | 2014-06-06 | 2015-11-04 | 中国海洋石油总公司 | Shock resistant pressure bearing device |
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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: 20110126 Termination date: 20170702 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |