CN201152161Y - Outer pipe packer for cementing absorption well - Google Patents
Outer pipe packer for cementing absorption well Download PDFInfo
- Publication number
- CN201152161Y CN201152161Y CNU2007200158580U CN200720015858U CN201152161Y CN 201152161 Y CN201152161 Y CN 201152161Y CN U2007200158580 U CNU2007200158580 U CN U2007200158580U CN 200720015858 U CN200720015858 U CN 200720015858U CN 201152161 Y CN201152161 Y CN 201152161Y
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- piston
- packer
- central tube
- lock pin
- well
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Abstract
The utility model provides an external tube packer for the cementing of absorption wells that consists of an upper contact, a pressure transmitting pole, a central tube, a piston, a rubber packer, a tray, a lower contact, a lock pin, a distinction clamping block and a spring. The upper contact, the central tube and the lower contact are connected by screw threads and sealed by sealing rings; the piston, the rubber packer and the tray are serially sleeved on the central tube; the external part of the piston is sleeved in the upper contact; the distinction clamping block and the spring are ridged in an inner groove at the lower part of the piston; the lock pin is inserted into the upper contact and the lock pin hole of the piston. When the pressure rises to a certain value, the piston moves downward; the compressed rubber packer expands to avoid the cement paste at the upper part of the packer entering an absorption layer at the lower part of the packer; thus, the quality of the well cementing is guaranteed. The absorption well has simple manufacturing, easy installation and operation, convenient usage, good fixity, low cost, high reliability, and less labor.
Description
Technical field:
The utility model relates to a kind of downhole tool that uses on the coal bed gas drilling well is produced, particularly a kind of absorption well state well external packer of pipe.
Background technology:
Run into the severe leakage layer after the coal bed gas drilling well, in the well cementation process, the production difficult problem of well cementation failure is caused on the cement paste stratum of bleeding.Of this sort packer is arranged at present, but complex structure, cost is higher, and complex operation is applied in being not suitable for producing.
Summary of the invention:
The purpose of this utility model is to provide a kind of absorption well well cementation external packer of pipe.It can effectively prevent the cement paste stratum of bleeding, and safe and reliable, simple in structure, cost is low, and processing ease is applied in being well suited for producing.
The purpose of this utility model is achieved in that it is made up of top connection, pressure transmission hole, central tube, piston, packing element, pallet, lower contact, lock pin, distinguish clamping block, spring, and top connection, central tube, lower contact are screwed connection, and the sealing ring sealing is arranged; Piston, packing element, pallet then are sleeved on the central tube in order, and the outside of piston then is sleeved in the top connection; Distinguish clamping block, spring are set in the inside groove of piston bottom; In the lockpin hole on lock pin insertion top connection and the piston.
Operating principle: when cementing the well, filled with water mud in the sleeve pipe, and when replacing with well killing fluid is because the pressure in the sleeve pipe acts on power on the piston less than the shearing force of lock pin, so packer is not worked by the pressure transmission hole on the central tube.When well killing fluid replaces sleeve bottom, because the sealing function of plug makes that the pressure in the sleeve pipe constantly raises.When pressure is elevated to certain value, make the pressure in the sleeve pipe act on power on the piston greater than the shearing force of lock pin by the pressure transmission hole on the central tube, make that lock pin is cut off, then piston moves downward, and the compression packing element expands.Simultaneously, the retaining button interlock on distinguish clamping block and the central tube is when the pressure in the sleeve pipe discharges, piston still keeps the pressure to packing element, make packing element keep swelling state, can prevent that like this cement paste on packer top from entering into the lost-circulation zone of packer bottom, guaranteed that cementing quality is qualified.
The utility model is screwed connection owing to adopting top connection, central tube, lower contact, and the sealing ring sealing is arranged; Piston, packing element, pallet then are sleeved on the central tube in order, and the outside of piston then is sleeved in the top connection; Distinguish clamping block, spring are set in the inside groove of piston bottom; In the lockpin hole on lock pin insertion top connection and the piston.When pressure is elevated to certain value, make the pressure in the sleeve pipe act on power on the piston greater than the shearing force of lock pin by the pressure transmission hole on the central tube, make that lock pin is cut off, then piston moves downward, and the compression packing element expands.Simultaneously, the retaining button interlock on distinguish clamping block and the central tube is when the pressure in the sleeve pipe discharges, piston still keeps the pressure to packing element, make packing element keep swelling state, can prevent that like this cement paste on packer top from entering into the lost-circulation zone of packer bottom, guaranteed that cementing quality is qualified.Make simply, fitting operation is convenient.Easy to use, stationarity is good, saves cost.Safe and reliable, reduce workman's amount of labour.
Description of drawings:
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment:
The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.
As shown in the figure, the utility model is made up of top connection 1, pressure transmission hole 2, central tube 3, piston 4, packing element 5, pallet 6, lower contact 7, lock pin 8, distinguish clamping block 9, spring 10, top connection 1, central tube 3, lower contact 7 are screwed connection, and the sealing ring sealing is arranged; Piston 4, packing element 5,6 on pallet are sleeved on the central tube 3 in order, and the outside of piston 4 then is sleeved in the top connection 1; Distinguish clamping block 9, spring 10 are set in the piston 4 bottom inside grooves; In the lockpin hole that lock pin 8 inserts on top connection 1 and the piston 4.In the process of going into the well, the well cementation of coal bed gas drilling well severe leakage well external packer of pipe duty such as schematic diagram left half.When cementing the well, filled with water mud in the sleeve pipe, and when replacing with well killing fluid is because the pressure in the sleeve pipe acts on power on the piston less than the shearing force of lock pin, so packer is not worked by the pressure transmission hole on the central tube.When well killing fluid replaces sleeve bottom, because the sealing function of plug makes that the pressure in the sleeve pipe constantly raises.When pressure is elevated to certain value, make the pressure in the sleeve pipe act on power on the piston greater than the shearing force of lock pin by the pressure transmission hole on the central tube, make that lock pin is cut off, then piston moves downward, and the compression packing element expands.Simultaneously, the retaining button interlock on distinguish clamping block and the central tube is when the pressure in the sleeve pipe discharges, piston still keeps the pressure to packing element, make packing element keep swelling state, can prevent that like this cement paste on packer top from entering into the lost-circulation zone of packer bottom, guaranteed that cementing quality is qualified.
Claims (1)
1, a kind of absorption well well cementation external packer of pipe, it is made up of top connection (1), pressure transmission hole (2), central tube (3), piston (4), packing element (5), pallet (6), lower contact (7), lock pin (8), distinguish clamping block (9), spring (10), it is characterized in that: top connection (1), central tube (3), lower contact (7) are screwed connection, and the sealing ring sealing is arranged; Piston (4), packing element (5), pallet (6) then are sleeved on the central tube (3) in order, and the outside of piston (4) then is sleeved in the top connection (1); Distinguish clamping block (9), spring (10) are set in the inside groove of piston (4) bottom; In the lockpin hole on lock pin (8) insertion top connection (1) and the piston (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200158580U CN201152161Y (en) | 2007-11-14 | 2007-11-14 | Outer pipe packer for cementing absorption well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200158580U CN201152161Y (en) | 2007-11-14 | 2007-11-14 | Outer pipe packer for cementing absorption well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201152161Y true CN201152161Y (en) | 2008-11-19 |
Family
ID=40127840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200158580U Expired - Fee Related CN201152161Y (en) | 2007-11-14 | 2007-11-14 | Outer pipe packer for cementing absorption well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201152161Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713143A (en) * | 2009-10-01 | 2012-10-03 | 长年Tm公司 | Pump-in seal |
| CN103797211A (en) * | 2010-12-17 | 2014-05-14 | 埃克森美孚上游研究公司 | Packer for alternate flow channel gravel packing and method for completing wellbore |
| CN108518196A (en) * | 2018-04-08 | 2018-09-11 | 徐州大屯工程咨询有限公司 | A kind of drilling antipriming |
| CN110630210A (en) * | 2019-10-16 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Loess layer leakage-proof plugging tool and use method thereof |
| CN111712615A (en) * | 2018-02-12 | 2020-09-25 | 沙特阿拉伯石油公司 | Leakage drilling packer |
| CN111927383A (en) * | 2020-09-17 | 2020-11-13 | 东营市正能石油科技有限公司 | Packer for water injection well of oil field |
-
2007
- 2007-11-14 CN CNU2007200158580U patent/CN201152161Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713143A (en) * | 2009-10-01 | 2012-10-03 | 长年Tm公司 | Pump-in seal |
| CN102713143B (en) * | 2009-10-01 | 2015-07-22 | 长年Tm公司 | Pump-in seal |
| CN103797211A (en) * | 2010-12-17 | 2014-05-14 | 埃克森美孚上游研究公司 | Packer for alternate flow channel gravel packing and method for completing wellbore |
| US9404348B2 (en) | 2010-12-17 | 2016-08-02 | Exxonmobil Upstream Research Company | Packer for alternate flow channel gravel packing and method for completing a wellbore |
| CN103797211B (en) * | 2010-12-17 | 2016-12-14 | 埃克森美孚上游研究公司 | For substituting the packer of flow channel gravel filling and for the method completing pit shaft |
| CN111712615A (en) * | 2018-02-12 | 2020-09-25 | 沙特阿拉伯石油公司 | Leakage drilling packer |
| CN108518196A (en) * | 2018-04-08 | 2018-09-11 | 徐州大屯工程咨询有限公司 | A kind of drilling antipriming |
| CN110630210A (en) * | 2019-10-16 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Loess layer leakage-proof plugging tool and use method thereof |
| CN110630210B (en) * | 2019-10-16 | 2023-12-01 | 中国石油天然气集团有限公司 | Leakage-proof plugging tool for yellow soil layer and using method thereof |
| CN111927383A (en) * | 2020-09-17 | 2020-11-13 | 东营市正能石油科技有限公司 | Packer for water injection well of oil field |
| CN111927383B (en) * | 2020-09-17 | 2020-12-11 | 东营市正能石油科技有限公司 | Packer for water injection well of oil field |
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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: 20081119 Termination date: 20091214 |