CN201778743U - Dropping-prevention device in sleeve - Google Patents
Dropping-prevention device in sleeve Download PDFInfo
- Publication number
- CN201778743U CN201778743U CN2010205512802U CN201020551280U CN201778743U CN 201778743 U CN201778743 U CN 201778743U CN 2010205512802 U CN2010205512802 U CN 2010205512802U CN 201020551280 U CN201020551280 U CN 201020551280U CN 201778743 U CN201778743 U CN 201778743U
- Authority
- CN
- China
- Prior art keywords
- suspension joint
- cone
- packer assembly
- sleeve
- lock pipe
- 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
Links
Abstract
A dropping-prevention device in a sleeve comprises a Y211 packer assembly, and the lower part of a connecting-tripping device is connected with the upper part of the Y211 packer assembly. The connecting-tripping device comprises an upper suspension joint, a sheering pin, an inner lock pipe, and a lower suspension joint, wherein the lower part of the upper suspension joint is milled into a strip body; the upper suspension joint and the lower suspension joint are suspended though each other, and the inner wall of the strip body at the lower part of the upper suspension joint is limited by the outer wall at the lower part of the inner lock pipe; and the inner lock pipe is fixed in the upper suspension joint through the sheering pin. The taper of the outer conical surface of the cone of the Y211 packer assembly is smaller than 10 degrees, a slip on the Y211 packer assembly is matched with the cone, and the taper of the matching surface of the cone and the slip is the same. Since the taper of the matching surface between the cone and the slip is smaller than 10 degrees, the cone and the slip are self-locked within the self-locking angle, and the Y211 packer assembly can be anchored on the sleeve, so that when an oil string falls in the sleeve, the oil string can be stopped, thereby reducing fishing workload, and avoiding damage of the oil string and tools caused by high-speed falling of the oil string. Therefore, the utility model has remarkable economic benefit.
Description
Technical field
The utility model relates to the down-hole anchor tool that a kind of oil well is used, and is falling-proof apparatus in a kind of sleeve pipe.
Background technology
Tubing string is in oil pumping process, disconnected coming off into the accident of sleeve pipe inner bottom part often taken place, falling into the sleeve pipe inner bottom part at a high speed can cause tubing string and downhole tool to damage, the flow string that electric submersible pump is particularly arranged down, because electric submersible pump appearance and size is bigger, fall into and salvage very difficultly in the well, also can salvage failure sometimes, oil well is scrapped, caused the tremendous economic loss.
Summary of the invention
The purpose of this utility model provides falling-proof apparatus in a kind of sleeve pipe, solves the disconnected problem of taking off Hou Luojing of tubing string, falls into sleeve bottom after avoiding that tubing string is disconnected and taking off.
The purpose of this utility model has been achieved in that Y211 packer assembly, the on-off connector bottom is connected with Y211 packer assembly top, on-off connector is by last suspension joint, cut off pin, the internal lock pipe, following suspension joint is formed, last suspension joint bottom is milled and is split into the bar body, last suspension joint hangs mutually with following suspension joint, last suspension joint lower bar body inwall is retrained by internal lock pipe bottom outer wall, the internal lock pipe is fixed in the suspension joint by cutting off pin, cone outer conical surface tapering on the Y211 packer assembly is less than 10 °, slips on the Y211 packer assembly cooperates with cone, and cone is identical with slips fitting face tapering.
The beneficial effects of the utility model are: after the utility model is gone into the well and put in place, the grappling of Y211 packer assembly, tubing string weight makes certain contact force between cone and the slips, because cone is identical with slips fitting face tapering, tapering is less than 10 °, in the locking angle, thus on-off connector throw off be divided into two bodies after, after the tubing string on the last suspension joint taken away, cone and slips self-locking, Y211 packer assembly still can be anchored on the sleeve pipe, and tubing string is disconnected to be taken off when falling in sleeve pipe when occurring, and makes tubing string not continue to fall, reduce the salvage amount, avoid tubing string to fall to causing tubing string and tool damage at a high speed, therefore, the utlity model has remarkable economic efficiency.
Description of drawings
Accompanying drawing 1 is a structure assembling drawing of the present utility model.
The specific embodiment
1 couple of embodiment of the present utility model describes below in conjunction with accompanying drawing.
As shown in the figure, embodiment of the present utility model is by on-off connector, Y211 packer assembly 5 is formed, wherein, on-off connector is by last suspension joint 1, cut off pin 2, internal lock pipe 3, following suspension joint 4 is formed, the on-off connector bottom is connected with Y211 packer assembly 5 tops, last suspension joint 1 bottom is milled and is split into the bar body, last suspension joint 1 hangs mutually with following suspension joint 4, last suspension joint 1 lower bar body inwall is by the 3 bottom outer wall constraints of internal lock pipe, internal lock pipe 3 is fixed in the suspension joint 1 by cutting off pin 2, cone 5-1 outer conical surface tapering on the Y211 packer assembly 5 is less than 7 °, less than from the locking angle, slips 5-2 on the Y211 packer assembly 5 cooperates with cone 5-1, and cone 5-1 is identical with slips 5-2 fitting face tapering.
Y211 packer assembly 5 removes the grappling assembly that converts behind the rubber for existing Y211 packer, and its anchorage method is identical with the packer set method.Y211 packer assembly 5 anchorage forces are 30KN-80KN, after grappling is finished, apply downward power to internal lock pipe 3, break and cut off pin 2, internal lock pipe 3 is descending, lose constraint to last suspension joint 1 lower bar body, 1 body bottom of last suspension joint can interiorly be received, suspension joint 1 and following suspension joint 4 can not be hung mutually, tubing string on the last suspension joint 1 can propose, propose the back owing to cone 5-1 and slips 5-2 self-locking, Y211 packer assembly 5 anchorage forces still are 30KN-80KN, thereby can catch the instrument that comes off in sleeve pipe.
Tapering is meant the angle between the conical surface and the axis.
Claims (1)
1. falling-proof apparatus in the sleeve pipe, Y211 packer assembly (5) is arranged, the on-off connector bottom is connected with Y211 packer assembly (5) top, it is characterized in that: on-off connector is by last suspension joint (1), cut off pin (2), internal lock pipe (3), following suspension joint (4) is formed, last suspension joint (1) bottom is milled and is split into the bar body, last suspension joint (1) hangs mutually with following suspension joint (4), last suspension joint (1) lower bar body inwall is retrained by internal lock pipe (3) bottom outer wall, internal lock pipe (3) is fixed in the suspension joint (1) by cutting off pin (2), cone (5-1) outer conical surface tapering on the Y211 packer assembly (5) is less than 10 °, slips (5-2) on the Y211 packer assembly (5) cooperates with cone (5-1), and cone (5-1) is identical with slips (5-2) fitting face tapering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205512802U CN201778743U (en) | 2010-09-19 | 2010-09-19 | Dropping-prevention device in sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205512802U CN201778743U (en) | 2010-09-19 | 2010-09-19 | Dropping-prevention device in sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201778743U true CN201778743U (en) | 2011-03-30 |
Family
ID=43791956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205512802U Expired - Fee Related CN201778743U (en) | 2010-09-19 | 2010-09-19 | Dropping-prevention device in sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201778743U (en) |
-
2010
- 2010-09-19 CN CN2010205512802U patent/CN201778743U/en not_active Expired - Fee Related
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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: 20110330 Termination date: 20110919 |