CN105587286B - Lost circulation prevention flushing packer - Google Patents
Lost circulation prevention flushing packer Download PDFInfo
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- CN105587286B CN105587286B CN201410573673.6A CN201410573673A CN105587286B CN 105587286 B CN105587286 B CN 105587286B CN 201410573673 A CN201410573673 A CN 201410573673A CN 105587286 B CN105587286 B CN 105587286B
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- central tube
- valve
- shunting body
- valve ball
- leather cup
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Abstract
The invention discloses lost circulation prevention flushing packers, including sequentially connected top connection, upper shell, central tube, lower housing, lower contact from top to bottom, it is provided with leather cup assembly on the outside of the central tube, the inner barrel that the lower housing and lower contact collectively constitute is provided with one-way on-off valve, the upper casing body sidewall opens up the flowing hole of connection central tube, the suction inlet that the lower casing body sidewall opens up while being connected with central tube and one-way on-off valve.The one-way on-off valve includes shunting body, valve bonnet, stainless steel valve ball, valve ball spring, the shunting body is fixed on lower contact inner wall, valve bonnet is connected at the top of shunting body, and stainless steel valve ball is arranged in shunting body top open part, shunting body inner wall is equipped with step, and valve ball spring is installed between the stainless steel valve ball and shunting body inner wall step.The present invention can effectively prevent lost circulation in oil well cleanup and enter stratum, and packer sealing is reliable, wear-resistant resistance to wriggling, can effectively prevent sand and buries ball seat, and when workover treatment can be with draining.
Description
Technical field
The present invention relates to oil field packers, specifically lost circulation prevention flushing packer.
Background technology
In oilfield development process, due to hot-washing wax remover or the needs of pump card well-flushing unfreezing, need to carry out well-flushing to maintain
Normal production.In washing well process, due to some oil wells there are strata pressures low, energy deficit, well-flushing inevitably occurs
Liquid pours into the phenomenon that stratum, not only causes the temporarily or permanently injury to stratum, and production capacity convalescence extends or yield falls sharply, and
And the dosage of flushing fluid is also increased, well-flushing efficiency is reduced, operating cost is increased.Part well since formation leakage is serious,
Cycle can not be established when well-flushing, oil well is difficult to maintain normally to produce.
And existing flushing packer makes up a joint during lower tubular column and above carries since leather cup and sleeve interference coordinate every time
When tubing string plucks elevator, leather cup is opened by head of liquid thereon and is worn with casing completely, especially passes through casing coupling
When, abrasion is more serious, causes leather cup envelope wear out failure behind precalculated position, does not have a due sealing function, when well-flushing
It misses.Simultaneously existing flushing packer workover treatment rise tubing string when can not draining, be easy to cause well site pollution；It answers
It is easy to happen sand used in sand output well and buries ball seat, ball seat can not open the problem of influence normally produces.
Due to the above technical deficiency, existing flushing packer is not all widely applied, therefore there is an urgent need to
A kind of wear-resistant, sand control buries, can draining lost circulation prevention flushing packer.
Invention content
The purpose of the present invention is to provide lost circulation prevention flushing packer, when oil well cleanup can effectively prevent lost circulation into
Enter stratum, packer sealing is reliable, wear-resistant resistance to wriggling, can effectively prevent sand and buries ball seat, and when workover treatment can be with draining.
In order to achieve the above objectives, present invention employs following technical solution, lost circulation prevention flushing packer, including from upper and
Under sequentially connected top connection, upper shell, central tube, lower housing, lower contact, be provided with leather cup assembly on the outside of the central tube,
The inner barrel that the lower housing and lower contact collectively constitute is provided with one-way on-off valve, and the upper casing body sidewall opens up in connection
The flowing hole of heart pipe, the suction inlet that the lower casing body sidewall opens up while being connected with central tube and one-way on-off valve.
The one-way on-off valve includes shunting body, valve bonnet, stainless steel valve ball, valve ball spring, and the shunting body is fixed on down
Inner nosepiece wall connects valve bonnet at the top of shunting body, and stainless steel valve ball is arranged in shunting body top open part, and shunting body inner wall is set
There is step, valve ball spring is installed between the stainless steel valve ball and shunting body inner wall step.
The leather cup assembly includes at least one set of leather cup, adds bushing pipe between the leather cup top half and central tube, institute
It states and sealing ring is set between leather cup lower half portion and central tube, the leather cup bottom end sets gradually gear bowl, regulation ring.
The regulation ring is fixed in lower housing upper end by anti-rotation pin.
It is attached by jointing between the upper shell and central tube.
The top connection is that flexible type is connect with upper shell, and the top connection is connect with telescopic rod, and telescopic rod stretches into upper casing
In vivo, part of the telescopic rod inside upper shell is cased with spring, and telescopic rod bottom opens up block machine, and the spring upper end is withstood on
Upper shell inner top surface, lower end are withstood in block machine.
Compared to the prior art, the invention has the advantages that：
Lost circulation prevention flushing packer in the present invention can effectively avoid the leather cup wear out failure during lower tubular column and production
Wriggling failure in the process；Effectively sealing prevents lost circulation from entering stratum when well-flushing, stops that sand being avoided to bury ball seat, well workover when well
It can not increase workover operation construction process with draining when operation, it is reasonable in design, have a wide range of application, the term of validity is long, uses peace
It is complete reliable.For preventing reservoir injury, reservoir productivity is protected；The dosage of flushing fluid is reduced, well-flushing efficiency is improved；Oil field is improved to open
Sending out economic benefit has positive effect.
Description of the drawings
Fig. 1 is the structural schematic diagram of lost circulation prevention flushing packer of the present invention.
In figure, top connection 1, spring 2, telescopic rod 3, upper shell 4, flowing hole 5, jointing 6, leather cup 7, sealing ring 8, lining
Pipe 9, central tube 10, gear bowl 11, regulation ring 12, anti-rotation pin 13, lower housing 14, valve bonnet 15, stainless steel valve ball 16, valve ball spring
17, shunting body 18, lower contact 19.
Specific implementation mode
Detailed description for the present invention and technology contents, cooperation description of the drawings it is as follows, however attached drawing only provide reference with
Purposes of discussion is not intended to limit the present invention.
According to Fig. 1, lost circulation prevention flushing packer, including sequentially connected top connection 1 from top to bottom, upper shell 4, in
Heart pipe 10, lower housing 14, lower contact 19, the central tube outside are provided with leather cup assembly, and the lower housing and lower contact are common
The inner barrel of composition is provided with one-way on-off valve, and the upper casing body sidewall opens up the flowing hole 5 of connection central tube, the lower casing
The suction inlet that body sidewall opens up while being connected with central tube and one-way on-off valve.The one-way on-off valve include shunting body 18,
Valve bonnet 15, stainless steel valve ball 16, valve ball spring 17, the shunting body are fixed on lower contact inner wall, the connection valve at the top of shunting body
Cover, and stainless steel valve ball is arranged in shunting body top open part, and shunting body inner wall is equipped with step, the stainless steel valve ball and shunting
Valve ball spring is installed between internal wall stand rank.
The leather cup assembly includes at least one set of leather cup 7, and bushing pipe 9 is added between the leather cup top half and central tube,
Sealing ring 8 is set between the leather cup lower half portion and central tube, and the leather cup bottom end sets gradually gear bowl 11, regulation ring 12.
The regulation ring is fixed in lower housing upper end by anti-rotation pin.Between the upper shell and central tube by jointing 6 into
Row connection.The top connection is that flexible type is connect with upper shell, and the top connection is connect with telescopic rod 3, and telescopic rod stretches into upper casing
In vivo, part of the telescopic rod inside upper shell is cased with spring 2, and telescopic rod bottom opens up block machine, the spring upper end top
In upper shell inner top surface, lower end is withstood in block machine.
For rod-pumped well, lost circulation prevention flushing packer is connected under pump, with flow string tripping in.For electric pump well
Lost circulation prevention flushing packer is connected on motor hereinafter, with flow string tripping in.
For lost circulation prevention flushing packer during with flow string tripping in, all there are one above carry plucking after making up a joint every time
The action of elevator, leather cup stress is opened completely when each upper lifting pipe post, and top connection 1, telescopic rod 3 are compressed with flow string uplink
Spring 2 is in open seals state during upper put forward, bears the fluid column of leather cup or more since leather cup 7 and sleeve interference coordinate
Pressure, upper shell 4 and other positions below are opposite together to keep original position constant.
During normal production, stainless steel valve ball 16 is in normally open to oil well under the action of valve ball spring 17, and Produced Liquid is certainly
The suction inlet of 14 side of lower housing enters shunting body 18, and Produced Liquid enters 7 or more leather cup through valve bonnet 15, central tube 10, flowing hole 5
The annular space of oil pipe and casing is lifted to ground by oil well pump or electric pump.It, can be with when for sand output well or stopping well for a long time
Free sand setting, sand grains will not be deposited on stainless steel valve ball 16, but along under the annular space between shunting body 18 and lower housing 14
Row is deposited in tail pipe.
When oil well cleanup, flushing fluid enters from oil well casing in well, from oil pipe and casing annulus downwards until leather cup 7
It sets, due to being interference fitted between leather cup 7 and casing, leather cup 7 opens, and flushing fluid enters through flowing hole 5 in central tube 10, when well-flushing is arranged
When amount reaches certain value, stainless steel valve ball 16 compresses valve ball spring 17 under well action of hydraulic force, and valve ball is sitting in the inner cone of ball seat
On face, flushing fluid down going channel is closed.Flushing fluid can only on return, from flow string return ground.
When workover treatment lift pipe string, stainless steel valve ball 16 is in normally open, automatic draining.
The foregoing is merely presently preferred embodiments of the present invention, and non-to limit the scope of the claims of the present invention, other are with this
The equivalence changes of the patent spirit of invention should all belong to the scope of the claims of the present invention.
Claims (4)
1. lost circulation prevention flushing packer, which is characterized in that including sequentially connected top connection from top to bottom, upper shell, central tube,
Lower housing, lower contact, are provided with leather cup assembly on the outside of the central tube, in the cylinder that the lower housing and lower contact collectively constitute
Portion is provided with one-way on-off valve, and the upper casing body sidewall opens up the flowing hole of connection central tube, and the lower casing body sidewall opens up together
When the suction inlet that is connected with central tube and one-way on-off valve；
It is attached by jointing between the upper shell and central tube, the top connection connects with upper shell for flexible type
It connects, top connection is connect with telescopic rod, and telescopic rod stretches into upper shell, and part of the telescopic rod inside upper shell is cased with spring, stretches
Contracting bar bottom opens up block machine, and spring upper end withstands on upper shell inner top surface, and lower end is withstood in block machine.
2. lost circulation prevention flushing packer according to claim 1, which is characterized in that the one-way on-off valve includes shunting
Body, valve bonnet, stainless steel valve ball, valve ball spring, the shunting body are fixed on lower contact inner wall, valve bonnet are connected at the top of shunting body,
And stainless steel valve ball is arranged in shunting body top open part, and shunting body inner wall is equipped with step, the stainless steel valve ball and shunting body
Valve ball spring is installed between inner wall step.
3. lost circulation prevention flushing packer according to claim 1, which is characterized in that the leather cup assembly includes at least one set
Leather cup adds bushing pipe, is arranged between the leather cup lower half portion and central tube close between the leather cup top half and central tube
Seal, the leather cup bottom end set gradually gear bowl, regulation ring.
4. lost circulation prevention flushing packer according to claim 3, which is characterized in that the regulation ring passes through anti-rotation pin set
Gu in lower housing upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573673.6A CN105587286B (en) | 2014-10-23 | 2014-10-23 | Lost circulation prevention flushing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573673.6A CN105587286B (en) | 2014-10-23 | 2014-10-23 | Lost circulation prevention flushing packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105587286A CN105587286A (en) | 2016-05-18 |
| CN105587286B true CN105587286B (en) | 2018-08-17 |
Family
ID=55927164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410573673.6A Expired - Fee Related CN105587286B (en) | 2014-10-23 | 2014-10-23 | Lost circulation prevention flushing packer |
Country Status (1)
| Country | Link |
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| CN (1) | CN105587286B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762443B (en) * | 2016-08-18 | 2019-12-24 | 中国石油化工股份有限公司 | Well workover device and well workover method |
| CN112761569B (en) * | 2019-11-05 | 2024-06-25 | 中国石油化工股份有限公司 | Electric pump well flushing device and method, special packer and special hanging basket |
| CN112761581B (en) * | 2021-01-29 | 2021-09-03 | 大庆好乐知科技开发有限公司 | Soluble self-expanding type hot washing device without pressing oil layer |
| CN113107426B (en) * | 2021-04-21 | 2023-05-09 | 中煤科工集团西安研究院有限公司 | Method for releasing fracture packer of coal mine underground long drill Kong Shuili |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2561922Y (en) * | 2002-07-19 | 2003-07-23 | 中国石化胜利油田有限公司采油工艺研究院 | Oil layer protector |
| CN2674082Y (en) * | 2004-01-13 | 2005-01-26 | 徐敏生 | Settled sand bottom ball |
| CN2851546Y (en) * | 2005-06-16 | 2006-12-27 | 中国石化胜利油田有限公司采油工艺研究院 | Leak proof packer |
| US7562709B2 (en) * | 2006-09-19 | 2009-07-21 | Schlumberger Technology Corporation | Gravel pack apparatus that includes a swellable element |
| CN201695995U (en) * | 2010-07-03 | 2011-01-05 | 孙月东 | Sand settling type bottom ball |
| CN202417410U (en) * | 2012-01-01 | 2012-09-05 | 孙卫娟 | Well washing packer |
| CN204175232U (en) * | 2014-10-23 | 2015-02-25 | 中国石油化工股份有限公司 | A kind of lost circulation prevention flushing packer |
-
2014
- 2014-10-23 CN CN201410573673.6A patent/CN105587286B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105587286A (en) | 2016-05-18 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20191023 |
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