CN2145861Y - Self-check sealing spacer - Google Patents
Self-check sealing spacer Download PDFInfo
- Publication number
- CN2145861Y CN2145861Y CN 91222688 CN91222688U CN2145861Y CN 2145861 Y CN2145861 Y CN 2145861Y CN 91222688 CN91222688 CN 91222688 CN 91222688 U CN91222688 U CN 91222688U CN 2145861 Y CN2145861 Y CN 2145861Y
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- China
- Prior art keywords
- sealing
- packer
- utility
- model
- check
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a self-check sealing packer, which is a down-hole sealing device used for oil field operation and for accomplishing layering blocking in the well. The utility model is provided with a self-check sealing mechanism which can check the sealing performance one by one in multiple stages use, and the utility model also has the advantages of reliable sealing, convenient sealing and unsealing. The utility model comprises a sealing part, a seated sealing part, a locking part, a self-check sealing part, a differential pressure balance part and an unsealing part, and the utility model has simple structure and easy manufacturing. The utility model provides an effective tool for layering find ponding, layering check, layering injecting and layering oil extract in the oil fields.
Description
The utility model relates to the stifled packer of layering card in the well that uses on a kind of oil field, belongs to the downhole tool class.
At present, the packer that uses on the domestic and international oil field, its sealing is the key index of its service behaviour, and the method for inspection that adopts usually is: the pressure of spraining on packer top, see that it has or not leakage, from then on determine the quality of packer sealing performance.This method is for layering water detection, the multiple-string packer that uses in separate zone water shutoff, zonal testing or the seperated layer water injection, can only check upper packer, can't verify the sealing of bottom packers at different levels, the problem of bringing thus is: determined each payzone oil-containing water precision of analysis is poor after test result and the water detection, thereby cause take the water blockoff measure after (stifled, annotate grey water blockoff etc.) as changing, well yield descends, and oil reservoir is produced injury.Be used for other as the packer that can not be verified this class sealing performance and variously need the stifled underground work of layering card, the gained result produced distance greatly with former designing requirement after the result tended to make operation, have in addition the result opposite.
When the purpose of this utility model is to provide a kind of multistage or single-stage to use, can check the packer of its sealing performance step by step.
Of the present utility model from test envelope formula packer comprise hermetic unit, seat envelope part, lock portion, certainly test envelope part, pressure balance partly, the deblocking part.Hermetic unit is made of interior O-ring seal and external seal packing element etc.Seat envelope part is made of piston, fluid cylinder etc.Lock portion is made of lock sleeve, pawl spring, exterior central tube etc.From testing envelope part by testing the envelope piston, testing offset nail etc. and constitute.Balance portion is made of connector, dummy piston etc.The deblocking part is made of box cupling, top connection, inner central tube, deblocking pawl, deblocking pin etc.
The course of work branch of self-packing packer is gone into the well, seat seals, test envelope, balance pressure reduction, five parts of deblocking certainly.
Of the present utility modelly need not by other device from testing envelope formula packer owing to itself have from testing seal structure, just can be when multistage use and single-stage be crossed oil reservoir and are used its sealing performance of one by one inspection, remedied deficiency of the prior art.And because packer itself has the equilibrium liquid cylinder assembly, solved when carrying deblocking on the former no anchor packer, can't bear the problem that goes up pressure reduction more greatly.This packer has also that sealing is reliable, locking firmly, deblocking advantage easily.
1 given embodiment is further described the utility model below in conjunction with accompanying drawing.
Self-packing packer in implementing just is by box cupling (1), deblocking pin (2), joint (3), connector (4), lock sleeve (5), inner central tube (6), pawl spring (7), deblocking pawl (8), O-ring seal (9), external seal packing element (10), exterior central tube (11), hydrophthalmia (12), (16), (18), test envelope piston (13), interval baffle ring (14), test offset nail (15), dummy piston (17), shear pin (19), piston (20), flow container (21), lower contact (22), seat offset nail parts such as (23) is formed.
Box cupling (1) and inner central tube (6) are for tubing thread is connected, top connection (3) is screwed connection with connector (4), lock sleeve (5), and pawl spring (7) and exterior central tube (11) and exterior central tube (11) and piston (20) also interconnect with screw thread.Plug is loaded onto in the tail pipe bottom during use, press when reaching 2.0MPa when in central tube, spraining, shear pin (19) is cut off, when continuing to improve pressure to 0.7MPa, seat offset nail (23) is cut off, piston this moment (20) begins to compress packing element (10), exterior central tube (11) is being with pawl spring (7) up to move together simultaneously, when pressure reaches 12MPa, packing element (10) compression puts in place, and packing element outer wall and internal surface of sleeve pipe tightly fit together, and forms sealing state, simultaneously pawl spring (7) is caught lock sleeve (5) under self elastic force effect, an envelope process is finished in locking mutually, when continuing to improve pressure to 13.5MPa, testing offset nail (15) is cut off, test on envelope piston (13) and move, expose hydrophthalmia (12), pressure passes in oil pipe to be tested outside the envelope piston in two groups of packing elements and the formed little annular space of sleeve pipe, check the sealing of two groups of packing elements, finish from testing the envelope process.Packer set finishes when in running order, when last pressure reduction is higher, promotion is tested envelope piston (13) and is moved down, exposing hydrophthalmia (12) pressure passes on the dummy piston (17), pass to again on the fluid cylinder (20), produce the reciprocal active force of a kind of and last pressure reduction, act on the packing element (10), guarantee that packer is not because of the too high deblocking of last pressure reduction.The balance fluid cylinder is finished the balanced action process; The upper lifting pipe post, active force acts on the box cupling (1), because of having frictional resistance between packing element (10) and the casing wall, thereby fixed point is regarded in top connection (3) as, under the upper lifting force effect, the tubing string load increases 50KN, deblocking pin (2) is cut off, inner central tube (6) is being with deblocking pawl (8) to go up movement row 100mm, the deblocking pawl struts pawl spring (7), and pawl spring (7) breaks away from mutually with lock sleeve (5), under packing element (10) elastic force effect, piston (20), exterior central tube (11), packing element (10) etc. return the origin-location, finish the deblocking process.
This packer is applicable to layering water detection, water blockoff, oil production by layer, zonal testing, seperated layer water injection, for these oil field operations provide a kind of effective instrument.
Claims (3)
1, a kind of stifled downhole packer of the interior layering card of oil well that is used for comprises hermetic unit, seat envelope part, lock portion and deblocking part, it is characterized in that: this packer also comprises tests envelope part and pressure balance part certainly.
2, packer according to claim 1 is characterized in that: the envelope part tested certainly of this packer adopts and tests the envelope piston and add the structure of testing the offset nail, utilizes the hydraulic pressure verification sealing that spreads out of in the central tube.
3, packer according to claim 1 and 2 is characterized in that: the pressure balance part of this packer is made up of connector, dummy piston etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222688 CN2145861Y (en) | 1991-12-19 | 1991-12-19 | Self-check sealing spacer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222688 CN2145861Y (en) | 1991-12-19 | 1991-12-19 | Self-check sealing spacer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2145861Y true CN2145861Y (en) | 1993-11-10 |
Family
ID=33760310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91222688 Expired - Fee Related CN2145861Y (en) | 1991-12-19 | 1991-12-19 | Self-check sealing spacer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2145861Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975820A (en) * | 2015-06-25 | 2015-10-14 | 荆州市赛瑞能源技术有限公司 | Self-seal-examining slip packer |
| CN110469282A (en) * | 2019-07-21 | 2019-11-19 | 中国海洋石油集团有限公司 | A kind of electronic setting tool |
-
1991
- 1991-12-19 CN CN 91222688 patent/CN2145861Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975820A (en) * | 2015-06-25 | 2015-10-14 | 荆州市赛瑞能源技术有限公司 | Self-seal-examining slip packer |
| CN104975820B (en) * | 2015-06-25 | 2017-07-11 | 荆州市赛瑞能源技术有限公司 | It is a kind of to test envelope anchor packer certainly |
| CN110469282A (en) * | 2019-07-21 | 2019-11-19 | 中国海洋石油集团有限公司 | A kind of electronic setting tool |
| CN110469282B (en) * | 2019-07-21 | 2021-07-27 | 中国海洋石油集团有限公司 | Electric setting tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |