CN205387926U - Fracturing safety backwash well valve - Google Patents
Fracturing safety backwash well valve Download PDFInfo
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- CN205387926U CN205387926U CN201620208513.6U CN201620208513U CN205387926U CN 205387926 U CN205387926 U CN 205387926U CN 201620208513 U CN201620208513 U CN 201620208513U CN 205387926 U CN205387926 U CN 205387926U
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Abstract
Fracturing safety backwash well valve, downhole tool's for the operation design technical field is increased production in the acidizing of fracturing in the pit that relates to oil and natural gas, including the body, sets up the sliding sleeve at the body inner chamber, and sliding sleeve upper portion is equipped with the spacing groove, is equipped with the pinhole on the body, wears to put the shearing pin nail in the pinhole, be equipped with the end cap hole on the sliding sleeve lateral wall of spacing groove below, be equipped with the cross -section and for the through -hole of " T " shape, set up the jam head in the major diameter end of cross -section for the through -hole of " T " shape on the body of pinhole below, set up the end cap in the minor diameter end of cross -section for the through -hole of " T " shape, set up the spring between end cap and jam head, radially set up a plurality of first through -holes on the sliding sleeve, still be equipped with second through -hole and third through -hole from top to bottom on the body, the diameter of second through -hole is less than the third through -hole. The utility model provides a packer results in sand card problem because of the unable deblocking of sand setting, solves the ball simultaneously and stays the problem in the middle of the tubular column, goes out the tubular column with the ball backwash, avoids influencing measures such as subsequent circulation, salvage.
Description
Technical field
This utility model relates to the design field of the underground fracture acid stimulation operation downhole tool of petroleum gas.
Background technology
Hydraulic fracturing technology is all the Main Means of increasing yield and injection in oil-gas field development, develops particularly with low permeability oil and gas field, dependence means main especially.Due to the swift and violent increase of oil demand amount, forcing China that the exploitation of low permeability oil and gas field is increasingly paid attention to, the requirement of corresponding development technique is also more and more higher, and so, hydraulic fracturing technology have also been obtained rapid raising.And the low oil field of seeing through of many series of strata exploitation, after entering high water cut rate, layer is interior, interlayer contradiction is increasingly sophisticated, during conjunction lamination splits, the problem that the unbalanced transformation that fracturing fluid is advanced by leaps and bounds along high permeability formation or fracture initiation inequality causes causes is more and more prominent, and balanced fractured is the effective way improving fracturing effect.
The feature many for hyposmosis oil well, oil reservoir is thin, substratum is many and interlayer physical difference is bigger, study many packer layereds fracturing technique, multiple oil-gas Layer are incorporated into well by a tubing string and downhole tool, successively fracturing reform is switched on from bottom to top by the packing of packer and underground fracture, to meet the needs successively transformed during construction.Mechanical delamination fracturing technique effectively achieves interlayer balanced fractured, improves Oil/gas Well production profile, alleviates interlayer contradiction, and on-the-spot application achieves better effects.
Mechanical delamination fracturing technique require tubing string and instrument seal reliable, grappling is reliable, enter under safety and safely remove, and site operation due to packer because of sand setting cannot deblocking, cause tubing string sand card, it is necessary to carry out large repairs operation.Method conventional at present, the packer top of the tubular column structures such as Y341 packer, Y241 packer, Y221 packer or Y111 packer increases reacting cycle flushing valve, reacting cycle flushing valve can carry out anti-flushing well in pressing crack construction process as when there are sand plug and other abnormal conditions, oil jacket annular space is adopted to build the pressure, open anti-flushing well circulating valve, whole sand liquid in down-hole oil tube can be washed out, after well-flushing, the circulation of forward huge discharge can close circulating valve, proceed pressing crack construction.Sometimes due to packer top sand setting is too many, or anti-flushing well circulating valve sand card or unstable properties, cause that anti-flushing well circulating valve lost efficacy, it is impossible to enough carry out reacting cycle well-flushing.Therefore, a kind of safe inverse well-flushing valve of pressure break of research, after anti-flushing well circulating valve lost efficacy, sliding sleeve is opened in pitching, can carry out anti-flushing well, thus solving sand card problem.Owing to sliding sleeve is opened in pitching, ball is stayed in the middle of tubing string, affects the measures such as follow-up circulation, salvaging, is highly desirable to ball backwash is gone out tubing string.
Utility model content
This utility model purpose is in that for problem above, it is provided that a kind of easy to use, can carry out anti-flushing well, solve sand card problem, ball backwash can go out the safe inverse well-flushing valve of pressure break of tubing string.
This utility model includes body, arranging sliding sleeve in described chamber body, described sliding sleeve top is provided with stopper slot, and described body is provided with pin-and-hole, placing shear pin in described pin-and-hole, the inner of described shear pin is arranged in stopper slot and makes sliding sleeve and body be connected with each other；Sliding sleeve lateral wall below described stopper slot is provided with plug hole；Being provided with cross section on body below described pin-and-hole is "T"-shaped through hole, in the larger diameter end that described cross section is "T"-shaped through hole, blocking head is set, in the smaller diameter end that described cross section is "T"-shaped through hole, plug is set, arranging spring between described plug and blocking head, the two ends of described spring contact layout with plug and blocking head respectively；Described sliding sleeve is radially arranged multiple first through hole, is from top to bottom additionally provided with the second through hole and third through-hole on the body；The diameter of described second through hole is less than third through-hole；Multiple sealing ring it is additionally provided with between described body and sliding sleeve.
This utility model was after anti-flushing well circulating valve lost efficacy, throw low-density ball at well head, when pressure reaches requirement, cut short shear pin, open the safe inverse well-flushing valve sliding sleeve of pressure break, sliding sleeve moves down into bottom, and now, the first through hole is corresponding with third through-hole, and plug enters in plug hole under the action of the spring, sliding sleeve can not move up and down, can not rotate simultaneously, and sliding sleeve and body are fixed together.Now, positive well-flushing can be carried out, rinse the sand on packer top, or carry out anti-flushing well, the sand washing packer top returns row's well head from the second through hole and third through-hole through tubing string, and owing to the second through-hole diameter is much smaller than third through-hole, major part backwash is returned through tubing string through the first through hole and third through-hole and drained into well head, low-density ball is followed through the first through hole and third through-hole backwash liquor, returns and is discharged to well head.This utility model, after anti-flushing well circulating valve lost efficacy, can carry out anti-flushing well, thus solve packer because of sand setting cannot deblocking, cause sand card problem, solve ball simultaneously and stay the problem in the middle of tubing string, ball backwash is gone out tubing string, it is to avoid affect the measures such as follow-up circulation, salvaging.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As it is shown in figure 1, this utility model includes body 1, sliding sleeve 2 is set at body 1 inner chamber, sliding sleeve 2 top is provided with stopper slot 3, body 1 is provided with pin-and-hole 6, places shear pin 4 in pin-and-hole 6, and the inner of shear pin 4 is arranged in stopper slot 3 and makes sliding sleeve 2 and body 1 be connected with each other；Sliding sleeve 2 lateral wall below stopper slot 3 is provided with plug hole 5；Being provided with cross section on body 1 below pin-and-hole 6 is "T"-shaped through hole 7, in the larger diameter end that cross section is "T"-shaped through hole 7, blocking 8 is set, in the smaller diameter end that cross section is "T"-shaped through hole 7, plug 9 is set, arranging spring 10 between plug 9 and blocking 8, the two ends of spring 10 contact layout with plug 9 and blocking 8 respectively；Sliding sleeve 2 is radially arranged multiple first through hole 11, body 1 is from top to bottom additionally provided with the second through hole 12 and third through-hole 13；The diameter of the second through hole 12 is less than third through-hole 13；Multiple sealing ring 14 it is additionally provided with between described body 1 and sliding sleeve 2.
Claims (1)
1. the safe inverse well-flushing valve of pressure break, it is characterized in that: include body, in described chamber body, sliding sleeve is set, described sliding sleeve top is provided with stopper slot, described body is provided with pin-and-hole, placing shear pin in described pin-and-hole, the inner of described shear pin is arranged in stopper slot and makes sliding sleeve and body be connected with each other；Sliding sleeve lateral wall below described stopper slot is provided with plug hole；Being provided with cross section on body below described pin-and-hole is "T"-shaped through hole, in the larger diameter end that described cross section is "T"-shaped through hole, blocking head is set, in the smaller diameter end that described cross section is "T"-shaped through hole, plug is set, arranging spring between described plug and blocking head, the two ends of described spring contact layout with plug and blocking head respectively；Described sliding sleeve is radially arranged multiple first through hole, is from top to bottom additionally provided with the second through hole and third through-hole on the body；The diameter of described second through hole is less than third through-hole；Multiple sealing ring it is additionally provided with between described body and sliding sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620208513.6U CN205387926U (en) | 2016-03-18 | 2016-03-18 | Fracturing safety backwash well valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620208513.6U CN205387926U (en) | 2016-03-18 | 2016-03-18 | Fracturing safety backwash well valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205387926U true CN205387926U (en) | 2016-07-20 |
Family
ID=56380680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620208513.6U Active CN205387926U (en) | 2016-03-18 | 2016-03-18 | Fracturing safety backwash well valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205387926U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138917A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | It is a kind of to set sliding sleeve and the fracturing string comprising it |
| CN110671076A (en) * | 2019-09-17 | 2020-01-10 | 中国海洋石油集团有限公司 | Circulating valve for whipstock |
-
2016
- 2016-03-18 CN CN201620208513.6U patent/CN205387926U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138917A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | It is a kind of to set sliding sleeve and the fracturing string comprising it |
| CN109138917B (en) * | 2017-06-28 | 2020-09-22 | 中国石油化工股份有限公司 | Setting sliding sleeve and fracturing string comprising same |
| CN110671076A (en) * | 2019-09-17 | 2020-01-10 | 中国海洋石油集团有限公司 | Circulating valve for whipstock |
| CN110671076B (en) * | 2019-09-17 | 2022-04-08 | 中国海洋石油集团有限公司 | Circulating valve for whipstock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180726 Address after: 225009 No. 188, Weiyang Road, Yangzhou, Jiangsu Co-patentee after: China Petroleum & Chemical Corporation Jiangsu Oilfield Branch Patentee after: Sinopec Corp. Co-patentee after: Jiangsu oil field Mining Development Co., Ltd. Address before: 225009 No. 188, Weiyang Road, Yangzhou, Jiangsu Co-patentee before: China Petroleum & Chemical Corporation Jiangsu Oilfield Branch Patentee before: Sinopec Corp. |