CN202544792U - Novel casing back-off positioning and finishing device - Google Patents
Novel casing back-off positioning and finishing device Download PDFInfo
- Publication number
- CN202544792U CN202544792U CN2012201508597U CN201220150859U CN202544792U CN 202544792 U CN202544792 U CN 202544792U CN 2012201508597 U CN2012201508597 U CN 2012201508597U CN 201220150859 U CN201220150859 U CN 201220150859U CN 202544792 U CN202544792 U CN 202544792U
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- positioning
- toothed body
- tooth body
- casing
- tooth
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Abstract
The utility model relates to an oilfield borehole operation tool and in particular to a novel casing back-off positioning and finishing device. The technical scheme is that the novel casing back-off positioning and finishing device mainly comprises an upper joint, fixing bolts, a toothed body, an outer casing, a central shaft, a lower joint and back-off teeth, wherein the lower end of the upper joint is connected with the toothed body through the fixing bolts; the lower end of the toothed body is connected with the outer casing; the lower end of the outer casing is connected with the lower joint; the centers of the outer casing and the toothed body penetrate through the central shaft; and a plurality of groups of back-off teeth are arranged on an outer wall of the toothed body. The novel casing back-off positioning and finishing device has the beneficial effects that the device is simple in structure and reliable in operation, the central shaft is driven to rotate through a hydraulic power device, and further, the toothed body is driven to expand or shrink, so that the device smoothly enters a well, the wear between the device and the casing is avoided, the operating success rate is improved, and the operating cost is reduced.
Description
Technical field
The utility model relates to a kind of oilfield downhole operation instrument, particularly a kind of new casing back-off location fishing device.
Background technology
At present, when existing oilfield downhole operation, when being used for the sleeve pipe salvaging; Generally be that reversing tool carry is arrived design attitude, on put and put drill string, reversing tool drags for and obtains sleeve pipe; On carry drill string and implement back-off to the designing requirement tonnage, trip out instrument and waste and old sleeve pipe under the back-off situation smoothly.The problem of its existence is: in the process of reversed stream pipe; Can occur that the anchor tooth skids, grappling does not live the sleeve pipe phenomenon, influence normal reversed stream, even the great work accident that the sleeve pipe of lance below is poured out together might occur to drag for; Even cause disused well, and then produce into enormous economic loss.
Summary of the invention
The purpose of the utility model is exactly the above-mentioned defective that exists to prior art, and a kind of new casing back-off location fishing device is provided, and can prevent great work accident at the specified location back-off.
Its technical scheme is: mainly be made up of top connection, set bolt, tooth body, overcoat, central axis, lower contact and back-off tooth; The lower end of top connection connects the tooth body through set bolt; The lower end of tooth body connects overcoat; The lower end of overcoat connects lower contact, and the center of described overcoat and tooth body connects central axis; The outer wall of described tooth body is provided with many group back-off teeth.
Above-mentioned back-off tooth is horizontally installed on the outer wall of tooth body.
The beneficial effect of the utility model is: it is simple in structure, and reliable operation drives the central axis rotation through hydraulic power unit; And then drive the tooth volume expansion or shrink, device is gone into the well smoothly, avoided and sleeve pipe between wearing and tearing; Improve job success ratio, reduced operating cost.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model;
Among the last figure: top connection 1, set bolt 2, tooth body 3, overcoat 4, central axis 5, lower contact 6 and back-off tooth 7.
The specific embodiment
In conjunction with accompanying drawing 1, the utility model is done further to describe:
The utility model mainly is made up of top connection 1, set bolt 2, tooth body 3, overcoat 4, central axis 5, lower contact 6 and back-off tooth 7; The lower end of top connection 1 connects tooth body 3 through set bolt 2; The lower end of tooth body 3 connects overcoat 4, and the lower end of overcoat 4 connects lower contact 6, and the center of described overcoat 4 and tooth body 3 connects central axis 5; One end of central axis 5 drives its rotation through hydraulic power unit, and central axis 5 drives 3 expansions of tooth body or shrinks; The outer wall of described tooth body 3 is provided with many group back-off teeth 7, and wherein, every group of back-off tooth 7 is horizontally installed on the outer wall of split type tooth body 3, improved fixed effect.
Claims (2)
1. a new casing back-off is located fishing device; It is characterized in that: mainly form by top connection (1), set bolt (2), tooth body (3), overcoat (4), central axis (5), lower contact (6) and back-off tooth (7); The lower end of top connection (1) connects tooth body (3) through set bolt (2); The lower end of tooth body (3) connects overcoat (4), and the lower end of overcoat (4) connects lower contact (6), and the center of described overcoat (4) and tooth body (3) connects central axis (5); The outer wall of described tooth body (3) is provided with many group back-off teeth (7).
2. new casing back-off according to claim 1 location fishing device, it is characterized in that: described back-off tooth (7) is horizontally installed on the outer wall of tooth body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201508597U CN202544792U (en) | 2012-04-11 | 2012-04-11 | Novel casing back-off positioning and finishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201508597U CN202544792U (en) | 2012-04-11 | 2012-04-11 | Novel casing back-off positioning and finishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202544792U true CN202544792U (en) | 2012-11-21 |
Family
ID=47165444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201508597U Expired - Fee Related CN202544792U (en) | 2012-04-11 | 2012-04-11 | Novel casing back-off positioning and finishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202544792U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725658A (en) * | 2019-10-14 | 2020-01-24 | 中国石油化工股份有限公司 | Radial anchoring inverted-buckling casing taking and replacing device and method |
-
2012
- 2012-04-11 CN CN2012201508597U patent/CN202544792U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725658A (en) * | 2019-10-14 | 2020-01-24 | 中国石油化工股份有限公司 | Radial anchoring inverted-buckling casing taking and replacing device and method |
| CN110725658B (en) * | 2019-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Radial anchoring inverted-buckling casing taking and replacing device and method |
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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: 20121121 Termination date: 20130411 |