CN202882843U - Self-seal-examining fracturing bridge plug - Google Patents
Self-seal-examining fracturing bridge plug Download PDFInfo
- Publication number
- CN202882843U CN202882843U CN2012205504129U CN201220550412U CN202882843U CN 202882843 U CN202882843 U CN 202882843U CN 2012205504129 U CN2012205504129 U CN 2012205504129U CN 201220550412 U CN201220550412 U CN 201220550412U CN 202882843 U CN202882843 U CN 202882843U
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- sealing rubber
- envelope
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Abstract
The utility model discloses a self-seal-examining fracturing bridge plug which is suitable for technologies such as oil field separate layer fracturing and separate layer water injection. The self-seal-examining fracturing bridge plug comprises an upper connector, a center pipe, a releasing mechanism, an upper sealing rubber cylinder, a lower sealing rubber cylinder, a locking mechanism, an anchoring mechanism, an unsealing mechanism and a screwed plug. A seal-examining mechanism is arranged between the upper sealing rubber cylinder and the lower sealing rubber cylinder. The seal-examining mechanism is sleeved on the center pipe. When the bridge plug goes down to a designed well depth, the bridge plug achieves sealing in a setting mode by water injection pressing, the inner portion of an oil pipe is continuously pressed, when pressure is raised to a certain value, a seal-examining shear pin is sheared off, a seal-examining piston is pushed to go downwards by hydraulic pressure, liquid enters into an annular cavity formed by the lower sealing rubber cylinder, the upper sealing rubber cylinder and a sleeve through a first seal-examining hole in the center pipe and a second seal-examining hole (11) in a seal-examining sleeve, sealing performance of the lower sealing rubber cylinder and the upper sealing rubber cylinder can be detected, and working efficiency is improved.
Description
Technical field
The utility model relates to a kind of from testing the envelope press-fracturing bridge plug, and the genus fish-up-type fracture bridge plug is applicable in the techniques such as oil field layered pressure break, seperated layer water injection.
Background technology
In field produces, bridging plug is that the oil-water well operation process is used for the important downhole tool of layering blocking, it is the most commonly used wherein to be used for the lower fish-up-type fracture bridge plug of adopting of envelope, the bridging plug of the type is suppressed by step and can be realized setting and the operation of giving up, test as the front cover by the enclosure space of bridging plug and above sleeve pipe is suppressed to realize, but find in the practical application, when existing producing zone or sleeve pipe to have leak source on top, be difficult to directly setting quality and the sealing performance of bridging plug effectively be verified, if testing envelope then needs to be lowered to one time again and tests sealing pipe column, not only increased flow chart, also increased operating cost, therefore in actual production process, generally do not test envelope, and directly carry out operation of lower step, owing to can't verify the setting reliability of bridging plug, might cause the shutoff failure because of the setting defective or poor sealing performance of bridging plug behind the part well operations, cause the oil well can't the normal construction operation, produce to the oil field and bring loss.
Summary of the invention
The purpose of this utility model provides a kind of from testing the envelope press-fracturing bridge plug, after bridging plug sets, and can be on ground by suppressing to judge the setting reliability of bridging plug.
The utility model is achieved in that it is by central tube, releasing gadget, upper cartridge and lower seal packing element, retaining mechanism, anchor mechanism, separating sealing mechanism and plug forms, between upper cartridge and lower seal packing element, be provided with one and test sealing mechanism, testing sealing mechanism is sleeved on the central tube, test sealing mechanism by testing big envelope, upper support ring and lower support ring, test the envelope piston, testing the envelope shear pin forms, test on the upper support ring and lower support ring that big envelope is contained in two ends, upper support ring and lower support ring set are contained on the central tube, between upper support ring and lower support ring, test the envelope piston, testing the envelope piston bush is contained on the central tube, and by test the envelope shear pin be fixed on the central tube, central tube is provided with first and tests sealing of hole, tests big envelope and is provided with second and tests sealing of hole.
When bridging plug with oil pipe with after arriving the downhole designs degree of depth down, suppress by water filling, bridging plug is realized setting, after bridging plug sets, continue to suppress, after pressure rise reaches certain value, test the envelope shear pin and cut off, hydraulic drive is tested the envelope descent of piston, liquid on central tube first test sealing of hole, test second on the big envelope test sealing of hole enter between lower seal packing element and the upper cartridge with the formed ring cavity of sleeve pipe in, whether judge by the pressure drop amplitude setting qualified, if it is defective to test envelope, the front deblocking of then giving up, solution is honored as a queen, carry oil pipe in the continuation, instrument is pulled out; When set finish and test the involution lattice after, drop into steel ball from oil pipe, be seated on the ball seat of giving up, suppress from the oil pipe water filling, after pressure reaches certain value, realize giving up operation, the above tubing string of lock pawl of giving up all proposes, and finishes to beat bridging plug and construct.
The utility model efficiently solves the setting process of current common press-fracturing bridge plug can't judge a setting whether qualified difficult problem, has improved the success rate that sets of press-fracturing bridge plug, has reduced because bridging plug sets the bad number of times that repeats operation, has improved operating efficiency.
Description of drawings
Accompanying drawing is the utility model structure principle chart
The 1-top connection; The 2-lock pawl of giving up; The 3-ball seat of giving up; The 4-shear pin of giving up; The 5-lock tube of giving up; The 6-connecting short section; 7-top adjustment ring; The upper cartridge of 8-; 9-upper support ring; 10-tests big envelope; 1-second tests sealing of hole; 12-tests the envelope piston; 13-tests the envelope shear pin; 14-first tests sealing of hole; 15-lower support ring, 16-lower seal packing element; The 17-jump ring; 18-bottom adjustment ring; The 19-upper cone; The 20-slip sleeve; 21-the 3rd sets shear pin; The 22-slips; The 23-spring; The 24-lower cone; 25-second sets shear pin; The 26-central tube; 27-moment of torsion screw; 28-first sets shear pin; The 29-cylinder sleeve; The 30-lock ring; The 31-piston; 32-sets the hole; 33-deblock pawl; 34-separates big envelope; 35-deblocking shear pin; The 36-lower contact; The 37-plug; 38-separates sealing mechanism; The 39-anchor mechanism; 40 locking mechanisms; 41-tests sealing mechanism; 42, releasing gadget.
The specific embodiment
The utility model is by top connection 1, central tube 26, releasing gadget 42, upper cartridge 8, lower seal packing element 16, retaining mechanism 41, anchor mechanism 39, separate sealing mechanism 38 and plug 37 compositions, be provided with one between cartridge 8 and the lower seal packing element 16 on it and test sealing mechanism 41, testing sealing mechanism 41 is sleeved on the central tube 26, test the testing on the upper support ring 9 and lower support ring 15 that big envelope 10 is contained in two ends of sealing mechanism 41, upper support ring 9 and lower support ring 15 are sleeved on the central tube 26, between upper support ring 9 and lower support ring 15, test envelope piston 12, testing envelope piston 12 is sleeved on the central tube 26, and by test the envelope shear pin 13 be fixed on the central tube 26, central tube 26 is provided with first and tests sealing of hole 14, testing big envelope 10 is provided with second and tests sealing of hole 11, upper cartridge 8, lower seal packing element 16, retaining mechanism 40, anchor mechanism 39 all is sleeved on the central tube 26, releasing gadget is connected with central tube 26 by connecting short section 6, separates sealing mechanism 38 and is connected with central tube 26 by lower contact 36.
During use, to certainly test first the envelope press-fracturing bridge plug and connect oil pipe, go into the well with oil pipe, down to the design well depth after water filling suppress, hydraulic pressure passes to piston 31 by the hole 32 that sets on the central tube 26, first sets shear pin 28 and cuts off after pressure reaches certain value, it is up that piston 31 promotes lower cone 24, lower cone 24 promotes slip sleeve 20, upper cone 19, jump ring 17, bottom adjustment ring 18 compression lower seal packing elements 16, then by upper support ring 9, test the upper cartridge 8 of big envelope 10 compressions, lower seal packing element 16 and upper cartridge 8 envelope that rises, after pressure rises to certain value again, second sets shear pin 25 and the 3rd sets shear pin 21 and cuts off, lower cone 24 is radially released slips 22 with upper cone 19, be anchored to internal surface of sleeve pipe, further compress simultaneously upper cartridge 8 and lower seal packing element 16, realize further rising envelope, simultaneously, up along with piston 31, buttless thread engagement on buttless thread on the piston 31 and the lock ring 30 realizes cylinder sleeve 29, lock ring 30, the locking of piston 31 guarantees lower seal packing element 16 and upper cartridge 8 not resiliences after pressure release, after pressure reaches certain value, set action and finish.
After setting, tests bridging plug envelope, continuation is suppressed in oil pipe, after pressure rise reaches certain value, testing envelope shear pin 13 cuts off, it is descending that hydraulic drive is tested envelope piston 12, liquid first testing sealing of hole 14, test second on the big envelope 10 and test sealing of hole 11 and enter in lower seal packing element 16 and upper cartridge 8 and the formed ring cavity of sleeve pipe on central tube 26 can be checked the sealing performance of lower seal packing element 16 and upper cartridge 8.
If it is defective to test envelope, the front deblocking of should giving up, during deblocking, apply certain upper lifting force from the well head rail, simultaneously dextrorotation oil pipe, moment of torsion passes to top connection 1 by oil pipe, give up and lock pawl 2, the lock tube 5 of giving up, connecting short section 6, central tube 26, deblock pawl 33, because slips 22 and internal surface of sleeve pipe grappling, slips 22 is by lower cone 24, moment of torsion screw 27, the rotation of cylinder sleeve 29 restriction lower contacts 36, therefore deblock pawl 33 is realized relatively rotating with lower contact 36, left hand thread between deblock pawl 33 and the lower contact 36 is threaded off, carry oil pipe in the continuation, lower seal packing element 16 and upper cartridge 8 resiliences, the 15 drive upper cones 19 of the snap on the central tube 26 are up simultaneously, and lower cone 24 is descending realization upper cone 19 under Action of Gravity Field, lower cone 24 separates with slips 22, slips 22 is regained under the effect of spring 23, finish deblocking, carry oil pipe in the continuation, instrument is pulled out.
As test the involution lattice, and drop into steel ball from oil pipe, be seated on the ball seat 3 of giving up, suppress from the oil pipe water filling, after pressure reached certain value, the shear pin 4 of giving up was cut off, the ball seat 3 of giving up is descending, get out of the way the elastic claw of the lock pawl 2 of giving up, carry oil pipe on this moment, the elastic claw of the lock pawl 2 of giving up reclaims, the lock pawl 2 of giving up is thrown off with the lock tube 5 of giving up, realization is given up, and the lock pawl 2 above tubing strings of giving up all propose, and finish the bridging plug operation.
After pressing crack construction is finished, when bridging plug need to trip out, go into the well with dragging for anchor in the oil pipe connection, drag for anchor in inciting somebody to action down to separating big envelope 34 bottoms, on carry oil pipe, when upper lifting force reaches certain value, deblocking shear pin 35 is cut off, and carries oil pipe in the continuation, in drag for anchor and drive to separate big envelope 34, deblock pawl 33 is up, the elastic claw of deblock pawl 33 reclaims, deblock pawl 33 is thrown off with lower contact 36, carries oil pipe in the continuation, lower seal packing element 16 and upper cartridge 8 resiliences, snap on the central tube 26 15 drive upper cones 19 are up simultaneously, lower cone 24 is descending realization upper cone 19 under Action of Gravity Field, lower cone 24 separates with slips 22, and slips 22 is regained under the effect of spring 23, the bridging plug deblocking, carry oil pipe in the continuation, bridging plug is tripped out.
Claims (2)
1. certainly test the envelope press-fracturing bridge plug for one kind, it is comprised of top connection (1), central tube (26), releasing gadget (42), upper cartridge (8), lower seal packing element (16), retaining mechanism (40), anchor mechanism (39), solution sealing mechanism (38) and plug (37), it is characterized in that, be provided with one between upper cartridge (8) and the lower seal packing element (16) and test sealing mechanism (41), test sealing mechanism (41) and be sleeved on the central tube (26).
2. according to claim 1 a kind of from testing the envelope press-fracturing bridge plug, it is characterized in that, describedly test the testing on the upper support ring (9) and lower support ring (15) that big envelope (10) is contained in two ends of sealing mechanism (41), upper support ring (9) and lower support ring (15) are sleeved on the central tube (26), between upper support ring (9) and lower support ring (15), test envelope piston (12), testing envelope piston (12) is sleeved on the central tube (26), and by test the envelope shear pin (13) be fixed on the central tube (26), central tube (26) is provided with first and tests sealing of hole (14), tests big envelope (10) and is provided with second and tests sealing of hole (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205504129U CN202882843U (en) | 2012-10-25 | 2012-10-25 | Self-seal-examining fracturing bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205504129U CN202882843U (en) | 2012-10-25 | 2012-10-25 | Self-seal-examining fracturing bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202882843U true CN202882843U (en) | 2013-04-17 |
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ID=48074283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205504129U Expired - Fee Related CN202882843U (en) | 2012-10-25 | 2012-10-25 | Self-seal-examining fracturing bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202882843U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074491A (en) * | 2014-07-09 | 2014-10-01 | 中国石油集团渤海钻探工程有限公司 | Oil pipe bridge plug |
| CN111764865A (en) * | 2020-08-07 | 2020-10-13 | 深圳百途石油技术服务有限公司 | Soluble end cap of pump sending |
| CN113155371A (en) * | 2021-03-10 | 2021-07-23 | 四川省威沃敦化工有限公司 | Soluble bridge plug anchoring and sealing performance testing tool and using method thereof |
-
2012
- 2012-10-25 CN CN2012205504129U patent/CN202882843U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074491A (en) * | 2014-07-09 | 2014-10-01 | 中国石油集团渤海钻探工程有限公司 | Oil pipe bridge plug |
| CN111764865A (en) * | 2020-08-07 | 2020-10-13 | 深圳百途石油技术服务有限公司 | Soluble end cap of pump sending |
| CN113155371A (en) * | 2021-03-10 | 2021-07-23 | 四川省威沃敦化工有限公司 | Soluble bridge plug anchoring and sealing performance testing tool and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20131025 |