CN2866798Y - Safety joint - Google Patents
Safety joint Download PDFInfo
- Publication number
- CN2866798Y CN2866798Y CN 200620089729 CN200620089729U CN2866798Y CN 2866798 Y CN2866798 Y CN 2866798Y CN 200620089729 CN200620089729 CN 200620089729 CN 200620089729 U CN200620089729 U CN 200620089729U CN 2866798 Y CN2866798 Y CN 2866798Y
- Authority
- CN
- China
- Prior art keywords
- paw
- disengaging
- sleeve
- sliding sleeve
- spigot joint
- 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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- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
A safety back-off sub comprises a disengaging paw sleeve connector with particularity that the disengaging paw sleeve connector is connected to a body through a left-hand fastener, a salvaging short pitch is connected with the lower port of the body, a locked groove is arranged in the surface of the body, a petal spacing paw is arranged on the under part of the disengaging paw sleeve connector in which a shearing pin is connected with a sliding sleeve, a boss is arranged on the inner surface of the disengaging paw sleeve connector under the shearing dowel. The lateral sides of the boss between the sliding sleeve and the disengaging paw sleeve connector is provided with a space, a locking sleeve is connected to the under portion of the sliding sleeve and a spacing paw is imbedded in the locking groove through the locking sleeve. The utility model has the advantages of simple and reasonable structure, good controllability, flexible and reliable movement not only can drive torque in different directions but also can release safely. When the tool is fastened, the fracturing string can be released and pulled out successfully by using the sealed multiple fracturing tube composed by a safety back-off sub, thereby a plenty of workover treatment time can be saved to deal with channel and workover .efficiency can be improved.
Description
Technical field
The utility model belongs to the oil-gas field downhole operation instrument, particularly a kind of safe back-off sub.
Background technology:
Safe back-off sub mainly is to be used for improving the separate stratum fracfturing process duct string that oil gas field uses on the fracturing yield increasing process.It can solve pipe string card situation after the pressure break that a variety of causes causes, and leaves the laminated distributor under well instrument behind, trips out fracturing string, carries out the normal process downhole tool then.Existing back-off sub mainly contains common left-hand thread back-off sub, hydraulic pressure back-off sub and mechanical back-off sub, though can both finish the task of giving up, but can't satisfy can the transmission different directions the requirement that can give up safely again of moment of torsion, and do not stay next step treatment channel after giving up, and complicated operation, performance is unreliable.
Summary of the invention:
The purpose of this utility model is to solve the problems referred to above that prior art exists, provide a kind of simple and reasonable for structure, controllability is good, moment of torsion that can the transmission different directions can be given up safely again, can stay next step abundant treatment channel after giving up, easy to operate, flexible movements are reliable, the safe back-off sub that the activity duration is short.
The utility model is achieved in that it has a disengaging pawl bell and spigot joint, its special character is that the disengaging pawl bell and spigot joint is connected with body by left-hand thread, be connected with junk sub in the body lower port, be provided with locked groove in body internal surface, be provided with the petal-shaped position-limited claw in disengaging pawl bell and spigot joint bottom, in the disengaging pawl bell and spigot joint, be connected with sliding sleeve by shear pin, below being positioned at shear pin, the inner surface of disengaging pawl bell and spigot joint is provided with boss, between sliding sleeve and disengaging pawl bell and spigot joint, be positioned at the boss both sides and be provided with the gap, be connected with lock tube in the sliding sleeve bottom, position-limited claw is inlaid in the locked groove by lock tube.
The utility model has the advantages that: simple and reasonable for structure, controllability is good, easy to operate, flexible movements are reliable, the moment of torsion of energy transmission different directions can be given up safely again, the card envelope separate stratum fracfturing pipe that uses this safe back-off sub to form, under the situation that instrument is blocked, can give up like a cork, successfully trip out fracturing string, abdicate next step abundant treatment channel, and can save a large amount of workover treatment time, reduce working strength of workers, improve well workover efficient, reduce the cost of production of oil gas well, reduce the pollution of job execution environment.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
Among the figure: 1-disengaging pawl bell and spigot joint, 1a-position-limited claw, 1b-boss, 2-O RunddichtringO, 3-O RunddichtringO, 4-shear pin, 5-sliding sleeve, 6-body, 6a-locked groove, 7-lock tube, 8-junk sub.
The specific embodiment
As shown in the figure, it has a disengaging pawl bell and spigot joint 1, be connected with body 6 in disengaging pawl bell and spigot joint 1 middle part outer rim by left-hand thread, in body 6 lower port by the junk sub 8 that has been threaded, be provided with locked groove 6a at body 6 inner surfaces, corresponding locked groove 6a place is provided with petal-shaped position-limited claw 1a in disengaging pawl bell and spigot joint 1 bottom, in disengaging pawl bell and spigot joint 1, be connected with sliding sleeve 5 by shear pin 4, below being positioned at shear pin 4, the inner surface of disengaging pawl bell and spigot joint 1 is provided with boss 1b, between sliding sleeve 5 and disengaging pawl bell and spigot joint 1, be positioned at boss 1b both sides and be provided with the gap, in sliding sleeve 5 bottoms by the lock tube 7 that has been threaded, position-limited claw 1a is inlaid in the locked groove 6a by lock tube 7, to guarantee the demand of driving torque.Between disengaging pawl bell and spigot joint 1 and body 6 upper port and sliding sleeve 5, be respectively equipped with O RunddichtringO 2,3.
Drop into the annex steel ball before giving up, steel ball is sitting on the sliding sleeve 5, builds the pressure by ground, cuts off shear pin 4, and sliding sleeve 5 and lock tube 7 be descending release disengaging pawl bell and spigot joint 1 simultaneously, is rotated in the forward disengaging pawl bell and spigot joint 1; After giving up, pull out of hole and to take disengaging pawl bell and spigot joint 1, sliding sleeve 5, lock tube 7 and steel ball out of, body 6 and junk sub 8 are stayed the down-hole, so that stay abundant passage for next step well workover processing.
Claims (1)
1, a kind of safe back-off sub, comprise disengaging pawl bell and spigot joint (1), it is characterized in that: disengaging pawl bell and spigot joint (1) is connected with body (6) by left-hand thread, be connected with junk sub (8) in body (6) lower port, be provided with locked groove (6a) at body (6) inner surface, be provided with petal-shaped position-limited claw (1a) in disengaging pawl bell and spigot joint (1) bottom, in disengaging pawl bell and spigot joint (1), be connected with sliding sleeve (5) by shear pin (4), below being positioned at shear pin (4), the inner surface of disengaging pawl bell and spigot joint (1) is provided with boss (1b), between sliding sleeve (5) and disengaging pawl bell and spigot joint (1), be positioned at boss (1b) both sides and be provided with the gap, be connected with lock tube (7) in sliding sleeve (5) bottom, position-limited claw (1a) is inlaid in the locked groove (6a) by lock tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620089729 CN2866798Y (en) | 2006-03-07 | 2006-03-07 | Safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620089729 CN2866798Y (en) | 2006-03-07 | 2006-03-07 | Safety joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2866798Y true CN2866798Y (en) | 2007-02-07 |
Family
ID=37702502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620089729 Expired - Fee Related CN2866798Y (en) | 2006-03-07 | 2006-03-07 | Safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2866798Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098678A (en) * | 2018-10-19 | 2018-12-28 | 中石化江汉石油工程有限公司 | Releasing pup joint for horizontal well conveying tractor perforation tool |
-
2006
- 2006-03-07 CN CN 200620089729 patent/CN2866798Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098678A (en) * | 2018-10-19 | 2018-12-28 | 中石化江汉石油工程有限公司 | Releasing pup joint for horizontal well conveying tractor perforation tool |
| CN109098678B (en) * | 2018-10-19 | 2024-01-26 | 中石化江汉石油工程有限公司 | Releasing nipple for horizontal well conveying tractor perforating tool |
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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: 20070207 |