CN2254951Y - Eccentric active cover type overshot for gripping sucker rod - Google Patents
Eccentric active cover type overshot for gripping sucker rod Download PDFInfo
- Publication number
- CN2254951Y CN2254951Y CN 96227769 CN96227769U CN2254951Y CN 2254951 Y CN2254951 Y CN 2254951Y CN 96227769 CN96227769 CN 96227769 CN 96227769 U CN96227769 U CN 96227769U CN 2254951 Y CN2254951 Y CN 2254951Y
- Authority
- CN
- China
- Prior art keywords
- eccentric
- main body
- sucker
- utility
- 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
Links
Abstract
The utility model relates to an eccentric active cover type overshot for gripping sucker rod, which is mainly composed of an upper connector, a reducing barrel body, an eccentric station shoulder body, a guide shoe, a shutter chuck, a torsion spring, an axle pin, etc. When the utility model enters a sleeve pipe to a sucker position, with the guide of the guide shoe, the sucker can enter into the eccentric station. After ejecting and passing through the shutter chuck, the opening of the shutter chuck can clamp the underground sucker, and the utility model can accomplish gripping with lifting a pipe column. The utility model has the characteristics of large gripping bore diameter, high gripping success ratio, etc., the utility model is suitable for gripping the rod-shaped (pipe-shaped) sucker in a sleeve pipe with 139-178 mm diameter, the connecting hoop diameter of the sucker is not larger than 65 mm, and the body diameter is not larger than 30 mm.
Description
The utility model relates to a kind of well rod fishing device, especially for salvaging band box cupling or bar with the level (pipe) shape junk special tool in the oil well casing.
Existing sucker rod fishing device, as three ball fishers, it salvages principle is to lean on three steel balls in inclined hole, under the deadweight effect, moves up and down to drag for and obtains junk.Three ball fishers have two weakness, the one, in heavy oil wells, salvage, when box cupling or shoulder by three steel balls, ball is pushed up top dead-centre, lives steel ball because of oil is sticky steel ball can not be fallen, and causes and salvages failure.The 2nd, run into the heavy load junk, ball is deviate from inclined hole easily, makes the salvaging can not be successful.Salvaging when the reversible fishing socket can not be used for pumping rod disengaging, the negative formula fishing socket latus rectum of living is little, and the loose-leaf chuck is not protected object outward, causes the junk slippage to cause easily and salvages failure.
The utility model purpose provides a kind of simple in structure, and is easy to use, the eccentric shutter-type sucker rod socket of salvaging band box cupling or bar with the level (pipe) shape junk in sleeve pipe of dependable performance.
The utility model adopts eccentric main body shoulder, because guard circle arranged, it makes the valve chuck under the situation of salvaging after construction resets, and has played strong protective effect around it, is unlikely to make the valve chuck deformation to open and cause and salvage failure when the junk overload.Adopt the reducing tubular construction, satisfied the needs of valve chuck rotation on the one hand, by replacing with joint, can realize multiple salvaging on the other hand.
Accompanying drawing 1 is the utility model structural representation.(1) is that top connection, (2) are that reducing cylindrical shell, (3) are that eccentric shoulder main body, (4) are that guide shoe, (5) are that valve chuck, (6) are that torque spring, (7) are pivot pins among the figure.
The utility model as shown in Figure 1, top connection (1) is a φ 73mm oil pipe box, the lower end is a pin thread, is connected with reducing cylindrical shell (2) with fishing string respectively.Reducing cylindrical shell (2) bottom internal diameter is greater than the top internal diameter, and two ends are that box is connected with eccentric shoulder main body (3) with top connection (1) respectively up and down.Eccentric shoulder main body (3) two ends up and down is a pin thread, be connected with guide shoe (4) with reducing cylindrical shell (2) respectively, in the different concentric eccentric inner chamber of two diameters is arranged, thereby form shoulder, eccentric inner chamber in addition side dig with shoulder and neat symmetry two rotating shaft bases arranged, hole intentionally on the seat.Valve chuck (5) is a garden platform shape, and middle porose, a side also has the width opening identical with bore dia, and the offside symmetry has two sulculuses, and the welding turning arm is used.Turning arm is a cuboid, and an end is the garden arc and two holes are arranged, and is welded on the valve chuck, becomes one with the valve chuck.Axis of rotation penetrates from the rotating shaft base hole, realizes fixedly turning arm and torque spring usefulness.Torque spring (6) is through in the axis of rotation, and each one of left-handed dextrorotation is arranged, and an end is fixed in the main body aperture, and the other end is pressed on the valve chuck (5).Guide shoe (4) top is that box is connected with main body.
When implementing fishing in the petroleum well workover operation, this utility model is connected on the bottom of fishing string, is lowered in φ 139 to the 178mm sleeve pipes, salvaging box cupling is below the φ 30mm, and body is not more than the sucker rod of φ 33mm.When this utility model is lowered in the sleeve pipe junk position, under the guide shoe guiding, junk enters in the off-centre, continues to transfer tubing string, junk backs down the valve chuck, after the rod collar step passed through the valve chuck, the valve chuck is return under the torque spring effect, and the sucker rod body enters in the valve chuck opening, on carry fishing string, fishing socket is up, and the valve chuck blocks in rod collar, step, the continuation and carries fishing string, thereby realizes salvaging.
The utility model design latus rectum is big, can realize the salvaging of bar (pipe) the class junk of multiple band box cupling or step, if change the different valve chuck of internal diameter, can enlarge the salvaging scope, if replace with joint and guide shoe, can enlarge the salvaging scope once more, also can realize the salvaging of junks such as glass fiber reinforced plastic oil pumping rod.Owing to adopt valve chuck and eccentric shoulder structure, strengthened and born load, improved fishing success ratio.
Claims (5)
1, the eccentric shutter-type sucker rod socket of a kind of oil well, this device is made up of top connection (1), reducing cylindrical shell (2), eccentric shoulder main body (3), guide shoe (4), valve chuck (5), torque spring (6), pivot pin parts such as (7), it is characterized in that top connection is a φ 73mm oil pipe box, the lower end is a pin thread, is connected with the reducing cylindrical shell with fishing string respectively.
2, fishing socket according to claim 1, it is characterized in that reducing cylindrical shell (2) bottom internal diameter is greater than the top internal diameter, up and down two ends be box respectively with top connection (1) bottom internal diameter greater than the top internal diameter, two ends are that box is connected with eccentric shoulder main body (3) with top connection (1) respectively up and down.
3, fishing socket according to claim 1, it is characterized in that eccentric shoulder main body (3) up and down two ends be pin thread, link to each other with guide shoe (4) with reducing cylindrical shell (2) respectively, in the eccentric shoulder main body (3) the different concentric eccentric inner chamber of two diameters is arranged, thereby formation shoulder, eccentric inner chamber in addition side dig with shoulder and neat symmetry two rotating shaft bases arranged, hole intentionally on the seat.
4, fishing socket according to claim 1 is characterized in that valve chuck (5) is garden platform shape, and middle porose, a side has the width opening identical with bore dia, and the opposite side symmetry has two sulculuses, and turning arm is welded on the valve chuck.
5, fishing socket according to claim 1 is characterized in that torque spring (6) is through in the axis of rotation, and each one of left-handed dextrorotation is arranged, and an end is fixed in the main body aperture, and the other end is pressed on the valve chuck (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96227769 CN2254951Y (en) | 1996-04-20 | 1996-04-20 | Eccentric active cover type overshot for gripping sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96227769 CN2254951Y (en) | 1996-04-20 | 1996-04-20 | Eccentric active cover type overshot for gripping sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2254951Y true CN2254951Y (en) | 1997-05-28 |
Family
ID=33905803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96227769 Expired - Fee Related CN2254951Y (en) | 1996-04-20 | 1996-04-20 | Eccentric active cover type overshot for gripping sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2254951Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989312A (en) * | 2015-07-28 | 2015-10-21 | 中石化石油工程技术服务有限公司 | A sucker rod socket |
| CN106321005A (en) * | 2016-10-28 | 2017-01-11 | 中国石油化工股份有限公司 | Fishing socket for fixed valve ball of tubing pump and using method of fishing socket |
| CN106437594A (en) * | 2016-10-14 | 2017-02-22 | 中国地质调查局水文地质环境地质调查中心 | Fishing device and method of downhole HDPE (High-Density Polyethylene) well pipe of brine well |
| CN106703733A (en) * | 2015-11-17 | 2017-05-24 | 贵州高峰石油机械股份有限公司 | Coiled tubing fishing method and fishing barrel |
-
1996
- 1996-04-20 CN CN 96227769 patent/CN2254951Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989312A (en) * | 2015-07-28 | 2015-10-21 | 中石化石油工程技术服务有限公司 | A sucker rod socket |
| CN106703733A (en) * | 2015-11-17 | 2017-05-24 | 贵州高峰石油机械股份有限公司 | Coiled tubing fishing method and fishing barrel |
| CN106437594A (en) * | 2016-10-14 | 2017-02-22 | 中国地质调查局水文地质环境地质调查中心 | Fishing device and method of downhole HDPE (High-Density Polyethylene) well pipe of brine well |
| CN106321005A (en) * | 2016-10-28 | 2017-01-11 | 中国石油化工股份有限公司 | Fishing socket for fixed valve ball of tubing pump and using method of fishing socket |
| CN106321005B (en) * | 2016-10-28 | 2019-06-07 | 中国石油化工股份有限公司 | Tubular pump fixing valve ball fishing socket and its application method |
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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 |