CN201865611U - Reversing spear - Google Patents
Reversing spear Download PDFInfo
- Publication number
- CN201865611U CN201865611U CN201020618932XU CN201020618932U CN201865611U CN 201865611 U CN201865611 U CN 201865611U CN 201020618932X U CN201020618932X U CN 201020618932XU CN 201020618932 U CN201020618932 U CN 201020618932U CN 201865611 U CN201865611 U CN 201865611U
- Authority
- CN
- China
- Prior art keywords
- joint
- spear
- reversing
- connecting sleeve
- adapter sleeve
- 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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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model relates to a reversing spear for oil well workover, fishing and reversing operations, which comprises a joint, a connecting sleeve and a spear shaft. The joint, the connecting sleeve and the spear shaft are connected in sequence, a slip is arranged on the spear shaft, and the joint and the end of the connecting sleeve are in convex-concave butt joint. Set screws are fastened to concave-convex butt joint seams of the joint with the connecting sleeve, so that the joint and the connecting sleeve are connected in a positioning manner, and the connecting sleeve cannot shift. The reversing spear has the advantages that the reversing spear has simple structure, mechanical strength of a spear shaft is increased, production cost is reduced, and service life of the reversing spear is prolonged.
Description
Technical field
The utility model relates to the left hand fishing spear that a kind of oil field is used for well workover salvaging and back-off operation.
Background technology
In the prior art, left hand fishing spear is used for salvaging and back-off operation, can carry out the flushing fluid circulation, can also discharge fish in case of necessity.In fishing, left hand fishing spear is one of important kit of reverse buckling equipment, simultaneously also can with the supporting use of left-hand screw drill pipe.Left hand fishing spear is made up of parts such as joint, adapter sleeve, slips, lance bars.After slips entered the fish endoporus, the three lobe slips that external diameter is slightly larger than the fish internal diameter inwardly shrank, and its bounce tightly is stuck on the fish tube wall slips.On carry drilling tool, the conical surface of lance bar and slips is fitted, the radial component that is produced is stung slips and is tightly dragged for tubing string, carries drilling tool in the continuation and realizes salvaging.Bite rotation drilling tool behind the fish, three keys on the lance bar block slips can not rotate it, and slips passes to moment of torsion and dragged for tubing string and realize back-off.Transfer drilling tool when withdrawing from instrument earlier, the conical surface of lance bar and slips is thrown off, and then just changeing drilling tool, the lower surface card of slips is sitting on the end face of three keys of lance bar, and slips is held by key the conical surface can not be fitted, on carry drilling tool and can withdraw from instrument.Because joint adopts bump body to dock with the adapter sleeve end, for preventing the adapter sleeve displacement, fix three spacers in that the lance bar circumferential surface of adapter sleeve bottom is uniform, its shortcoming is need be at three screw holes of the weakness processing of lance bar, screw hole has reduced lance bar mechanical strength herein, the fracture of lance bar takes place in operation often herein, makes down-hole accident more serious.Processing spacer, boring, installation simultaneously wastes time and energy.
The utility model content
The purpose of this utility model is to provide a kind of architecture advances, the better left hand fishing spear of result of use at above-mentioned deficiency.
Technical solution of the present utility model is: left hand fishing spear comprises joint, adapter sleeve, the lance bar that connects in turn, on the lance bar slips is arranged, and joint adopts bump body to dock with the adapter sleeve end.Twist and be connected to holding screw at joint and adapter sleeve bump body butt joint place, and joint and adapter sleeve are located by connecting, and adapter sleeve can displacement.
The utility model has the advantages that: adopt to add the tightening screw, replaced, have simple in structurely, improved the mechanical strength of lance bar, reduced cost of production, the characteristics in raising product application life at lance bar surface installing and locating sheet at joint and adapter sleeve junction.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Description of drawings
Fig. 1 is the utility model structure diagram.
Fig. 2 is the joint design sketch.
Fig. 3 is the adapter sleeve structure diagram.
Fig. 4 is Fig. 3 left side TV structure sketch.
Fig. 5 is a lance bar structure diagram.
The specific embodiment
Referring to Fig. 1-5, left hand fishing spear comprises joint 1, adapter sleeve 2, the lance bar 3 that connects in turn, and slips 4 is housed on the lance bar.Joint 1 adopts bump body to dock with adapter sleeve 2 ends, is screwed with holding screw 5 at joint 1 respectively with three butt joint places of adapter sleeve 2 bump bodies, and holding screw 5 is uniformly distributed along the circumference.Adapter sleeve 2 adopts bump body to peg graft with lance bar 3, and moment of torsion passes to adapter sleeve 2 by joint 1, passes to lance bar 3 by adapter sleeve 2 again, and lance bar 3 utilizes three keys on the inclined-plane that moment of torsion is passed to slips 4.
Claims (2)
1. left hand fishing spear, comprise the joint (1), adapter sleeve (2), the lance bar (3) that connect in turn, slips (4) is arranged on the lance bar (3), joint (1) adopts bump body to dock with adapter sleeve (2) end, it is characterized in that at joint (1) and the stubborn holding screw (5) that is connected in adapter sleeve (2) bump body butt joint place.
2. according to the described left hand fishing spear of claim 1, it is characterized in that holding screw (5) is uniformly distributed along the circumference three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020618932XU CN201865611U (en) | 2010-11-23 | 2010-11-23 | Reversing spear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020618932XU CN201865611U (en) | 2010-11-23 | 2010-11-23 | Reversing spear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201865611U true CN201865611U (en) | 2011-06-15 |
Family
ID=44136768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020618932XU Expired - Fee Related CN201865611U (en) | 2010-11-23 | 2010-11-23 | Reversing spear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201865611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470205A (en) * | 2013-09-13 | 2013-12-25 | 中国海洋石油总公司 | Anti-jarring reversing fishing spear |
-
2010
- 2010-11-23 CN CN201020618932XU patent/CN201865611U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470205A (en) * | 2013-09-13 | 2013-12-25 | 中国海洋石油总公司 | Anti-jarring reversing fishing spear |
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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: 20110615 Termination date: 20131123 |