CN2565975Y - Forced desealing back-off packer - Google Patents
Forced desealing back-off packer Download PDFInfo
- Publication number
- CN2565975Y CN2565975Y CN 02243472 CN02243472U CN2565975Y CN 2565975 Y CN2565975 Y CN 2565975Y CN 02243472 CN02243472 CN 02243472 CN 02243472 U CN02243472 U CN 02243472U CN 2565975 Y CN2565975 Y CN 2565975Y
- Authority
- CN
- China
- Prior art keywords
- packer
- slip
- utility
- slips
- model
- Prior art date
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to an underground forced unsealing back-off packer (Y441-114T), which is used for the injection-production of an oil field. An upper slip (19) of the packer is coupled with an annular conical body (20) through a dovetail groove (31). The slip of the packer can be forcedly recovered; the weakness that a slip of an original 253-4 packer is different to recover can be overcome. The strength intensity of a salvage head of the packer can be enlarged; the utility model can create conditions for swimming salvage. The application area of the packer can be widened; the requirements of a process pipe column with different production techniques such as suspension ponding, product dispensing, hierarchical pressure gauging, etc., can be satisfied.
Description
(1) technical field:
The utility model belongs to oil field injection and extraction down-hole (Y441-114TW type) forces the deblocking back-off packer.
(2) background technology:
The Y441-114 packer, this packer deblocking difficulty is big, and key position intensity does not reach requirement.The slips of former Y441-114 packer through after the long underground work, easily has sand, wax, dead oil etc. to form deposit at this gap location producing a gap after the release and between housing, slips is obstructed when deblocking and can not normally regains.Can not deblocking when salvaging, cause workover.
(3) utility model content:
Technical problem to be solved in the utility model is at the problem of depositing in the background technology, and a kind of pressure deblocking back-off packer that does not produce stifled card at its slips place is provided.
The invention for solving the technical problem can reach by following technical solution: the packer upper slips is connected on the ring cone by dovetail groove.Track along dovetail groove when slips discharges discharges, and other down-hole impurity is difficult for entering, and can reach its purpose.
The utility model is compared with background technology has following beneficial effect: packer slip reclaims by force, has overcome the weakness that former 253-4 packer slip is difficult to reclaim; Strengthened the intensity of packer fishing head, for salvaging the condition of having created smoothly; Expand the packer application field, can satisfy the requirement of hanging water blockoff, joining different production technology process tubing strings such as product, delaminating pressure testing.
(4) description of drawings:
Accompanying drawing is the utility model installation drawing.
(5) specific embodiment:
Below in conjunction with the drawings and specific embodiments will the utility model is described in further detail:
Shown in figure, slips 19 is connected on the ring cone 20 by dovetail groove 31.
In such scheme, the lower contact 1 on the packer is by 2
3/
8" tubing thread connects with lower center tube 13; Piston 2, slip sleeve 5, slip spider 6, packing element are enclosed within on the lower center tube successively; Lower center tube and Pressure Block 14 are by 2
3/
8" the tubing thread connection; shell body 30 connects with Pressure Block 14 screw threads; slips locking cover 17 usefulness deblocking dowel fixes are on shell body; slips 19 is connected on the cone 20 by dovetail groove; cone is fixed on the shell body by cutting off pin, and safety joint seat 22 is connected by left-handed screw thread with safety joint 23, and back-off sub 29 is fixed in the safety joint by lock ball 26; lock ball is blocked and can not be dropped out by sliding sleeve 28, and insert in the Pressure Block 14 back-off sub 29 lower ends.
Other accessory has: O RunddichtringO (3,4,16,21,25,27), packing element jump ring 8, glue tube base offset nail 9, packing element spacer ring 10, protection packing element 11, cartridge 12, lower center tube 13, fillister head screw (15,18), sunk screw 24.
When discharging when going into the well, suppress 18Mpa by central tube, piston 2 under pressure, up promotion jump ring cover 5 is up together, it is 5 up and hang over jump ring that compression packing element 11 packing oil sets annular spaces, jump ring overlap, and guarantees that packing element still can keep compressive state after losing external force; Simultaneously, cone 20 is descending under pressure, and slips 19 stretches out shell body 30 under the effect of dovetail groove on the cone, be stuck on the casing wall; Be advanced into slips locking cover 17 under the cone, guarantee shed the pressure posterior pyramids can be not up, slips is not regained; After release finishes, drop into releasing tool inwards by oil pipe, sliding sleeve 28 is cut off pin under this instrumental purpose descending, and lock ball 26 loses and supports, and the upper lifting pipe post is finished and given up.As above method is given up unsuccessfully, can safety joint 23 and safety joint seat 22 be asked at left-handed screw thread dismantle at well head rotation pipeline to the right, thereby realize giving up.
When tripping out this and give up tubing string, following fishing spear connects with salvaging screw thread in the packer cone 20, and the upper lifting pipe post is cut off the pin 17 of slips locking cover, and cone is up, and slips 19 is forced withdrawal under the effect of cone dovetail groove; Carry in the continuation, packing element deblocking pin 7 is cut off, and packing element is regained, and deblocking is finished.
Claims (1)
- A kind of pressure deblocking back-off packer that relates to the oil field injection and extraction down-hole contains slips (19), ring cone (20), and it is characterized in that: slips (19) is connected on the ring cone (20) by dovetail groove (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02243472 CN2565975Y (en) | 2002-08-06 | 2002-08-06 | Forced desealing back-off packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02243472 CN2565975Y (en) | 2002-08-06 | 2002-08-06 | Forced desealing back-off packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2565975Y true CN2565975Y (en) | 2003-08-13 |
Family
ID=33715708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02243472 Expired - Fee Related CN2565975Y (en) | 2002-08-06 | 2002-08-06 | Forced desealing back-off packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2565975Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206181A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Top packer recovery tool |
| CN101542068B (en) * | 2006-11-21 | 2015-11-25 | 贝克休斯公司 | For the packer that down-hole uses |
-
2002
- 2002-08-06 CN CN 02243472 patent/CN2565975Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101542068B (en) * | 2006-11-21 | 2015-11-25 | 贝克休斯公司 | For the packer that down-hole uses |
| CN103206181A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Top packer recovery 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 |