CN201439695U - Pair-buckle type reversing overshot - Google Patents
Pair-buckle type reversing overshot Download PDFInfo
- Publication number
- CN201439695U CN201439695U CN2009202334919U CN200920233491U CN201439695U CN 201439695 U CN201439695 U CN 201439695U CN 2009202334919 U CN2009202334919 U CN 2009202334919U CN 200920233491 U CN200920233491 U CN 200920233491U CN 201439695 U CN201439695 U CN 201439695U
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- overshot
- fishing
- cylindrical shell
- pair
- utility
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Abstract
The utility model discloses a pair-buckle type reversing overshot, which relates to technology field of oilfield operation, in particular to a fishing tool. The pair-buckle type reversing overshot comprises an upper connector, an overshot body and a fishing claw; the utility model aims at the falling objects in well, and analyzes the characteristics of the pair-buckle fishing spear and the overshot; the pair-buckle type reversing overshot has the advantages that: the structure is simple, the processing is easy, and washing well can be circularly conducted, and the operation is simple, and the falling fishes can be released, and the reversing can be realized; therefore, the utility model can completely meet the fishing of pipeline falling objects whose fish top is oil pipe pin, and the construction process can be simplified, and the success ratio of fishing is increased, and the construction period is shortened, and the operation cost is saved, the economic efficiency is increased, meanwhile, the utility model has better promoting value and using value.
Description
Technical field
The utility model relates to the oil field operation technical field, particularly a kind of fishing tool.
Background technology
At present in the oil well repairing operation, at top of fish is a short fish fishing junk of oil pipe screw thread class, mainly is to take the method for the fish body being salvaged from the tubing string inner chamber, when inner chamber blocks no passage, drag for outside general the employing, outer vatman's tool mainly contains short top of fish fishing socket or female coupling tap.But there is insufficiency of function in these two kinds of instruments, short top of fish fishing socket does not have the back-off function, exist extracting insecure and salvage operation with female coupling tap, it is loose and complicated that female coupling tap easily causes fish to be fallen with the lower member thread in thread making salvaging process, and can not move back the safety issue of being brought after having extracting.Add up workover treatment data over the years, find that the accident that therefore can not withdraw from safely after causing salvaging former years happens occasionally, cause overhaul complex proceduresization, operating cost to rise greatly.Therefore research and develop novel fishing tool, make it can realize directly grasping the fish screw thread and salvage or back-off, and can withdraw from safely, seemed particularly important.
The utility model content
The utility model purpose is to design a kind of convenient button type back-off fishing socket of salvaging.
The utility model comprises top connection, cylindrical shell and bailer grab, the upper end of described cylindrical shell is provided with reverse internal thread, described top connection is connected the upper end of cylindrical shell by described reverse internal thread, at the inwall of described cylindrical shell, in same circumferentially uniform at least four boss radially, the inwall from described radially boss lower surface to the lower end of cylindrical shell is a round table surface entad; Described bailer grab comprises an annulus connector and is connected to the same end of described annulus connector and slips described radially boss equal number, described slips is provided with internal thread respectively, described bailer grab is arranged in the described cylindrical shell, described annulus connector is arranged in the radially top of boss, and respectively radially boss is separately positioned between the adjacent slips.
In the salvaging process, meet the junk top of fish when instrument, junk is incorporated into slips through inside trumpet formula guide shoe, slips male cone (strobilus masculinus) and cylindrical shell inner conical surface are thrown off, the upper end dieback, slips is forced to distending, and the top of fish male thread enters in the internal thread of slips, the inner extracting of slips internal thread tooth form is identical with the junk screw thread, under the slip insert elastic force, realize make-up, on carry drill string, corresponding inner conical surface has relative displacement in slip insert male cone (strobilus masculinus) and the cylindrical shell, slips is shunk further hold junk tightly, realize salvaging.
If in salvaging, can not pull out, keeping carrying out back-off under certain upper lifting force because of junk is stuck.The internal thread that grasps because of junk screw thread and slips achieves a butt joint, and further holds tightly under interior outer slope effect, is difficult for throwing off.Under the rotation torque effect, moment of torsion by on the cylindrical shell radially boss be delivered to slips, thereby realize back-off.
Withdraw from as need, then hit tubing string down, the round table surface in slips male cone (strobilus masculinus) and the cylindrical shell is thrown off, counter-rotating tubing string, but then shackle disengagement of the screw thread that has achieved a butt joint realize that safety withdraws from.
The utility model is at the trouble of lost tool in hole situation, and the design feature in conjunction with differentiating make-up fishing spear and back-off fishing socket has simple in structure, handling ease; Well-flushing capable of circulation; Simple to operate; Can discharge fish; Can realize the advantage of back-off, the utility model can satisfy the tubing fishing junk that top of fish is the oil pipe pin thread fully, can simplify working procedure, improves fishing success ratio, shorten construction period, saves operating cost, increase economic efficiency, have application value preferably.
Lengthening connects for convenience, makes cylindrical shell can extend into any degree of depth in down-hole, and the other end of described top connection is provided with the reaction internal thread, can connect left-hand screw drill pipe by this reaction internal thread.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the structural representation of bailer grab.
Fig. 3 is that the A-A of Fig. 2 is to profile.
The specific embodiment
As shown in Figure 1, 2, 3, the utility model mainly is made up of top connection 1, cylindrical shell 2 and bailer grab 3.
The upper end of cylindrical shell 2 is provided with reverse internal thread 2-1, and top connection 1 is threaded in the upper end of cylindrical shell 2 by reverse internal thread 2-1, and the other end of top connection 1 is provided with reaction internal thread 1-1.At the inwall of cylindrical shell 2, in same circumferentially uniform six boss 2-3 radially, the inwall Zi boss 2-3 lower surface radially to the lower end of cylindrical shell 2 is round table surface 2-2 entad.
Bailer grab 3 comprises an annulus connector 3-1 and is connected to six slips 3-2 of the same end of annulus connector 3-1 that each slips 3-2 is provided with internal thread 3-3 respectively.
Bailer grab 3 is arranged in the cylindrical shell 2, and annulus connector 3-1 is arranged in the radially top of boss 2-3, and respectively radially boss 2-3 is separately positioned between the adjacent slips 3-2.
Claims (2)
1. button type back-off fishing socket, it is characterized in that comprising top connection, cylindrical shell and bailer grab, the upper end of described cylindrical shell is provided with reverse internal thread, described top connection is connected the upper end of cylindrical shell by described reverse internal thread, at the inwall of described cylindrical shell, in same circumferentially uniform at least four boss radially, the inwall from described radially boss lower surface to the lower end of cylindrical shell is a round table surface entad; Described bailer grab comprises an annulus connector and is connected to the same end of described annulus connector and slips described radially boss equal number, described slips is provided with internal thread respectively, described bailer grab is arranged in the described cylindrical shell, described annulus connector is arranged in the radially top of boss, and respectively radially boss is separately positioned between the adjacent slips.
2. according to the described button type back-off of claim 1 fishing socket, it is characterized in that the other end of described top connection is provided with the reaction internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202334919U CN201439695U (en) | 2009-07-23 | 2009-07-23 | Pair-buckle type reversing overshot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202334919U CN201439695U (en) | 2009-07-23 | 2009-07-23 | Pair-buckle type reversing overshot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201439695U true CN201439695U (en) | 2010-04-21 |
Family
ID=42544365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202334919U Expired - Fee Related CN201439695U (en) | 2009-07-23 | 2009-07-23 | Pair-buckle type reversing overshot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201439695U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469458A (en) * | 2018-09-27 | 2019-03-15 | 核工业北京地质研究院 | A kind of circlip type fisher and its Refloatation method |
| CN110656896A (en) * | 2018-06-29 | 2020-01-07 | 中国石油天然气股份有限公司 | Sealing butt-buckling device for under-pressure workover operation |
-
2009
- 2009-07-23 CN CN2009202334919U patent/CN201439695U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656896A (en) * | 2018-06-29 | 2020-01-07 | 中国石油天然气股份有限公司 | Sealing butt-buckling device for under-pressure workover operation |
| CN109469458A (en) * | 2018-09-27 | 2019-03-15 | 核工业北京地质研究院 | A kind of circlip type fisher and its Refloatation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100421 Termination date: 20160723 |