CN2758459Y - Packer capable of washing well - Google Patents
Packer capable of washing well Download PDFInfo
- Publication number
- CN2758459Y CN2758459Y CN 200420092483 CN200420092483U CN2758459Y CN 2758459 Y CN2758459 Y CN 2758459Y CN 200420092483 CN200420092483 CN 200420092483 CN 200420092483 U CN200420092483 U CN 200420092483U CN 2758459 Y CN2758459 Y CN 2758459Y
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- CN
- China
- Prior art keywords
- packer
- self
- well
- fracturing
- utility
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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 packer capable of washing well, which is used for the fracturing and the acidification of natural gas wells and has the function of well back washing. The utility model comprises a sealed rubber barrel 2, a back washing valve 3, a central pipe 4, a slip 5, a setting piston 6 and self-locking buttons 7, 9, wherein the outer part of the central pipe 4 is respectively provided with the sealed rubber barrel 2, the back washing valve 3, the slip 5 and the setting piston 6, the self-locking buttons 7 is engaged with the outer self-locking button 9, and a screw nail 8 is arranged between the self-locking button 7 and the self-locking button 9. The utility model not only can satisfy the requirements of single layer fracturing and acidification and separate layer reformation, but also can satisfy the requirements of once separate layer fracturing and double layer construction, and the cost for the reformation of multi-air layer section is lowered. Simultaneously, the packer has the advantages of reliable setting and sitting clamping and high pressure bearing capability, when fracturing sand plugging occurs, a well can be back washed to wash sand to remove the plugging.
Description
Technical field:
The utility model is the packing special tool with anti-flushing well function of a kind of natural gas well pressure break, acidifying, specifically, is the washing well packer, adopts Ф 73.0mm oil pipe to be lowered to, and is applicable to Ф 139.7mm sleeve pipe.
Background technology:
In natural gas well separate stratum fracfturing, packer one of the instrument that is absolutely necessary, packer can be under gas well high pressure, high temperature operate as normal, be the key that guarantees natural gas well pressing crack construction.The Y344 packer is mainly adopted in long at present celebrating gas field when gas well is carried out separate stratum fracfturing, but this packer can not be realized the two-layer purpose of separate stratum fracfturing one time, simultaneously, the Y344 packer is when separate stratum fracfturing, cause sets by flow nipple, the well head pressure height, and the pressure break discharge capacity is restricted, if flow nipple lost efficacy, packer can not set.If adopt the Y341 packer,, when the separate stratum fracfturing upper strata, make tubing string the disconnected phenomenon of taking off occur easily once hydraulic anchor lost efficacy.Y341 packer and Y344 packer all belong to no combination wall and anchor packer, during the gas-bearing formation section, can not effectively prevent moving axially of oil pipe on pressure break, and sand plug can't de-plugging when pressure break.
Summary of the invention:
The purpose of this utility model provides the washing well packer with anti-flushing well function of the laminated distributor under well packing of a separate stratum fracfturing of a kind of fixed tubular column two gas-bearing formation sections.
The utility model be achieved in that comprise cartridge 2, backwash valve 3, central tube 4, slips 5, set piston 6, from snap close 7 and 9, central tube 4 is outer to be equipped with cartridge 2, backwash valve 3, slips 5 respectively, set piston 6, from snap close 7 with outside from snap close 9 engagements.
From snap close 7 and outside between snap close 9, be provided with screw 8.
Advantage of the present utility model is: not only can satisfy the requirement of natural gas well individual layer pressure break, acidifying separate zone stimulation, and can satisfy two-layer construction requirement of separate stratum fracfturing of fixed tubular column, reduce the cost that many gas-bearing formations section is transformed.Simultaneously, this packer has that to set, sit card reliable, the bearing capacity height, and during the pressure break sand plug, back-washable well sand washing de-plugging.
Description of drawings:
Accompanying drawing 1 is the non-structural representation under the state that sets of the present utility model.
Accompanying drawing 2 is the structural representation of the utility model under the state of setting.
The specific embodiment:
As shown in drawings, the utility model mainly by cartridge 2, backwash valve 3, central tube 4, slips 5, set piston 6, form from snap close 7 and 9 etc.This packer adopts hydraulic setting upper lifting pipe post deblocking working method, and repeats to set function.Adopt φ 73.0mm oil pipe that the Y241 packer is lowered in the φ 139.7mm sleeve pipe, after the pitching, when well head applies fluid pressure to 25MPa from oil pipe, the packer setting piston 6 up stop screws 1 of opening, promote the up and compression packing element 2 of slips 5 anchor portions, make its diameter become big, realize setting and grappling packing oil, sleeve pipe annular space.Simultaneously from snap close 7 with outside from snap close 9 engagements, retaining mechanism enters locking state, prevents that packing element and slips from setting, sitting card back and becoming flexible.When being forced into 30MPa again, ball seat is sheared, and finishes setting of packer.Can carry out the pressing crack construction operation.During the packer deblocking, only need the upper lifting pipe post, the screw 8 of the interior self-locking buckle that is connected with packer central tube 4 is cut off, and loses efficacy from snap close, and packer central tube 4 is up with respect to packing element 2 and slips 5, the packer deblocking.When sand setting in the well needs the anti-flushing well sand washing, can in sleeve pipe, add hydraulic pressure, open packer backwash valve 3, back-washable well sand washing.When tripping out packer, can first anti-flushing well, upper lifting pipe post deblocking packer again.
Claims (3)
1, washing well packer, comprise cartridge (2), backwash valve (3), central tube (4), slips (5), set piston (6), from snap close (7) and (9), it is characterized in that: central tube (4) is outer to be equipped with cartridge (2), backwash valve (3), slips (5) respectively, set piston (6), from snap close (7) with outside mesh from snap close (9).
2, washing well packer according to claim 1 is characterized in that: from snap close (7) and outside between snap close (9), be provided with screw (8).
3, washing well packer according to claim 1 is characterized in that: slips (5) is provided with the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092483 CN2758459Y (en) | 2004-09-20 | 2004-09-20 | Packer capable of washing well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092483 CN2758459Y (en) | 2004-09-20 | 2004-09-20 | Packer capable of washing well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2758459Y true CN2758459Y (en) | 2006-02-15 |
Family
ID=36078601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420092483 Expired - Fee Related CN2758459Y (en) | 2004-09-20 | 2004-09-20 | Packer capable of washing well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2758459Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424922A (en) * | 2019-08-05 | 2019-11-08 | 中国石油天然气股份有限公司 | Non-metal anchoring packer backwashing method |
| CN110552650A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Temporary well head block |
| CN115126438A (en) * | 2021-03-25 | 2022-09-30 | 中国石油天然气集团有限公司 | Electrodeless variable-diameter leakage blocking device and method thereof |
-
2004
- 2004-09-20 CN CN 200420092483 patent/CN2758459Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424922A (en) * | 2019-08-05 | 2019-11-08 | 中国石油天然气股份有限公司 | Non-metal anchoring packer backwashing method |
| CN110552650A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Temporary well head block |
| CN115126438A (en) * | 2021-03-25 | 2022-09-30 | 中国石油天然气集团有限公司 | Electrodeless variable-diameter leakage blocking device and method thereof |
| CN115126438B (en) * | 2021-03-25 | 2023-10-20 | 中国石油天然气集团有限公司 | Stepless reducing plugging device and method thereof |
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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 |