CN204941371U - A kind of safe on-off connector and use the separate zone production tubing string of this safe on-off connector - Google Patents
A kind of safe on-off connector and use the separate zone production tubing string of this safe on-off connector Download PDFInfo
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- CN204941371U CN204941371U CN201520604168.3U CN201520604168U CN204941371U CN 204941371 U CN204941371 U CN 204941371U CN 201520604168 U CN201520604168 U CN 201520604168U CN 204941371 U CN204941371 U CN 204941371U
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Abstract
The utility model discloses a kind of safe on-off connector and use the separate zone production tubing string of this safe on-off connector.The sleeve of the spline piston of safe on-off connector and fixed cover coordinate the dynamic gear edge that wall is respectively equipped with and is on spline piston and be on fixed cover determine gear edge, fixed gear is along the below of block on dynamic gear edge.Like this after ground is suppressed and cut off by locking shear pin, slotting key between spline piston and lower contact is relative with keyway throws off, throw off by the mode relatively rotated to make the upper and lower joint of safe on-off connector, then put in the process of joint upper, spline piston can determine gear along upper by dynamic gear along what hang over fixed cover, avoid spline piston to come off suddenly in up process, also just avoid spline piston and to come off caused work accident, ensure that the safety of operation of giving up.
Description
Technical field
The utility model relates to a kind of safe on-off connector and uses the separate zone production tubing string of this safe on-off connector.
Background technology
At present, in the oil recovery plugging tubing string of oil wells in field, the situation that conventional dropper cannot be given up may being there is, in order to ensure successfully to give up, applying safety joint, be arranged on the position that tubing string needs to throw off, for prevention and releasing down-hole accident provide guarantee.Now conventional safety joint has shear-type and reverse buckling type two kinds.Shear-type safety joint, primarily of top connection, sealing round section joint ring, cut off pin and lower contact composition, this safety joint only connects by shear pin, shear-type safety joint is when tubing string meets card, promotes tubing string, the pin in joint or copper sheathing is cut off, thus realize throwing off, the safety joint of copper sheathing shear-type needs to calculate joint with the load of lower part in use, and easily causes midway to come off by hole condition affects, and causes work accident.Reverse buckling type safety joint, primarily of top connection, sealing round section joint ring and lower contact composition, reverse buckling type has sawtooth pattern and square button-type, sawtooth pattern safety joint is typical reverse buckling type safety joint, and this joint is for preventing midway back-off disengagement voluntarily, and the cooperation of screw thread needs certain preload, must screw at ground pipe wrench, which results in that to throw off difficulty comparatively large, and the phenomenon of throwing off from other connection of thread easily occurs, poor reliability.
The Chinese patent literature CN201056994Y(day for announcing is on May 7th, 2008) disclose " hydraulic inverse-buckling safety joint ", comprise the top connection be connected successively from top to bottom, urceolus, lower contact, urceolus is connected by left hand thread with lower contact, the outer peripheral face of top connection is up big and down small ledge surface, the endoporus of lower contact is up big and down small stepped hole, between the lower end of top connection and the endoporus step of lower contact upper end, piston is installed, piston upper end is sleeved on the small end periphery of top connection, and be connected on urceolus by shear pin, the lower end of piston is inserted in the macropore section of lower contact, and be provided with the slotting key coordinated with the keyway of lower contact, be provided with in the circumferential groove of piston by outer cylinder diameter to fixing baffle ring, the inclined-plane of baffle ring upward, above baffle ring, urceolus endoporus offers baffle ring groove, the area of the lower ring end face of top connection is less than the area of the lower ring end face of piston, the distance of the upper surface of piston and the step end face of top connection is greater than baffle ring lower surface and is greater than slotting key length with the distance when annular groove, with when tubing string meets card, well head pressurizing urges piston says that shear pin is cut off, piston will drive the colleague be moved upward to when annular groove, the slotting key of piston tail can exit smoothly from keyway China, so just relieve the spline lock-out state between urceolus and lower contact, urceolus can be screwed off from lower contact under the effect of well head moment of torsion, realization is given up.But at piston with top connection by the process that upwards trips out, by the effect that upper and lower pressure reduction and piston are conducted oneself with dignity, piston very easily promotes flexible baffle ring and deviates from from the downside of baffle ring groove, so that relatively throw off between piston and top connection, urceolus, piston, being shed in well with the up midway of top connection, causes work accident.
Utility model content
The purpose of this utility model is to provide a kind of safe on-off connector come off when avoiding piston up with top connection, additionally provides a kind of separate zone production tubing string using this safe on-off connector simultaneously.
In order to realize above object, in the utility model, the technical scheme of safe on-off connector is as follows:
Safe on-off connector, comprise dock up and down lower contact, spline piston, the lower end of spline piston and the upper end correspondence of lower contact are provided with the slotting key and keyway that can plug along the vertical direction, spline piston upper sleeve is equipped with the fixed cover connected by locking shear pin, the sleeve of spline piston and fixed cover coordinate the dynamic gear edge that wall is respectively equipped with and is on spline piston and be on fixed cover determine gear edge, fixed gear is along the below of block on dynamic gear edge.
Fixed cover is set on the periphery of spline piston.
Spline piston comprises the baffle ring being connected to the piston main body on fixed cover by locking shear pin and being threaded on piston main body, and described dynamic gear is along the annular convex shoulder exposed from the periphery of piston main body for baffle ring or turn edge.
The inwall of fixed cover is convexly equipped with and is in the ring-shaped step of dynamic gear along below, described fixed gear is along the inner ring edge being ring-shaped step top, and the upper end of piston main body is that guiding movement is installed on the necking down end in ring-shaped step along the vertical direction, described dynamic gear is along exposing from the periphery of necking down end.
The outer peripheral face of piston main body is lower large little ledge surface, the segment of piston main body along the vertical direction guiding movement is installed in ring-shaped step, the large section block of piston main body is in the below of ring-shaped step, and the distance between the lower ring end face of ring-shaped step and the periphery step surface of piston main body is not less than the length that slotting key and keyway plug together mutually.
Fixed cover is the body section of top connection hypomere, and top connection is connected on the periphery of lower contact by fixed cover thread bush.
In the utility model, the technical scheme of separate zone production tubing string is as follows:
Separate zone production tubing string, comprise dropper, packer that safe on-off connector and below thereof are connected in series by oil pipe, safe on-off connector comprise dock up and down lower contact, spline piston, the lower end of spline piston and the upper end correspondence of lower contact are provided with the slotting key and keyway that can plug along the vertical direction, spline piston upper sleeve is equipped with the fixed cover connected by locking shear pin, the sleeve of spline piston and fixed cover coordinate the dynamic gear edge that wall is respectively equipped with and is on spline piston and be on fixed cover determine gear edge, fixed gear is along the below of block on dynamic gear edge.
Fixed cover is set on the periphery of spline piston, spline piston comprises the baffle ring being connected to the piston main body on fixed cover by locking shear pin and being threaded on piston main body, and described dynamic gear is along the annular convex shoulder exposed from the periphery of piston main body for baffle ring or turn edge.
The inwall of fixed cover is convexly equipped with and is in the ring-shaped step of dynamic gear along below, described fixed gear is along the inner ring edge being ring-shaped step top, and the upper end of piston main body is that guiding movement is installed on the necking down end in ring-shaped step along the vertical direction, described dynamic gear is along exposing from the periphery of necking down end.
Fixed cover is the body section of top connection hypomere, and top connection is connected on the periphery of lower contact by fixed cover thread bush, and the rotation direction of the connecting thread between upper and lower joint is contrary with the rotation direction of the connecting thread between remaining part in separate zone production tubing string.
In the utility model the sleeve of the spline piston of safe on-off connector and fixed cover coordinate the dynamic gear edge that wall is respectively equipped with and is on spline piston and be on fixed cover determine gear edge, fixed gear is along the below of block on dynamic gear edge.Like this after ground is suppressed and cut off by locking shear pin, slotting key between spline piston and lower contact is relative with keyway throws off, throw off by the mode relatively rotated to make the upper and lower joint of safe on-off connector, then put in the process of joint upper, spline piston can determine gear along upper by dynamic gear along what hang over fixed cover, avoid spline piston to come off suddenly in up process, also just avoid spline piston and to come off caused work accident, ensure that the safety of operation of giving up.
Accompanying drawing explanation
Fig. 1 is the structural representation of separate zone production tubing string in embodiment of the present utility model;
Fig. 2 is the structural representation of safe on-off connector in Fig. 1.
Detailed description of the invention
The embodiment of separate zone production tubing string in the utility model: as depicted in figs. 1 and 2, this separate zone production tubing string comprises in sleeve pipe the pressure transmission pump 10, safe on-off connector 11, dropper 12, Y441-152 packer 13, Y341-152 packer 14 and the votage control switch 15 that pass through oil pipe and be connected in series successively, this separate zone production tubing string is applied to oilfield separate zone production technical field, when well recovery tubing string can not be given up, by safe on-off connector 11, tubing string on it and below tubing string can be thrown off.
Safe on-off connector 11 comprises the top connection 8 and lower contact 1 that are connected by the rectangular thread of counterclockwise rotation direction.The periphery of the upper end of lower contact 1 is provided with the external screw thread be connected with the lower end of top connection 8, and on the periphery of the upper end of lower contact 1, is equipped with the screw thread sealing ring 2 be sealed and matched with the lower end side face of top connection 8 by annular slot cutting ferrule; The periphery of the lower end of lower contact 1 is provided with the external screw thread with below oil pipe.The lower end of top connection 8 is the fixed cover that thread bush is connected on lower contact 1 upper end, the periphery of fixed cover is equipped with the lower seal 3 be sealed and matched with the internal face side face of fixed cover by annular slot cutting ferrule, the inwall of fixed cover is convexly equipped with interval and is arranged in ring-shaped step above lower contact 1, and in fixed cover, being equipped with spline piston, spline piston is made up of the piston main body 4 of up-thin-low-thick step shell-like and the baffle ring 7 of threaded upper ends grafting thereof.The large end of piston main body 4 is the lock tube end being connected to the position on fixed cover between ring-shaped step and lower contact 1 by the locking shear pin 5 of radial spinning on the jacket wall of fixed cover, and is provided with the slotting key and keyway that can plug along the vertical direction in the upper end correspondence of the lower end of lock tube end and lower contact 1; Distance between the lower ring end face of ring-shaped step and the periphery step surface of piston main body 4 is not less than the length that slotting key and keyway plug together mutually; The small end of piston main body 4 is that guiding movement is installed on the necking down end in ring-shaped step along the vertical direction, and on the periphery of necking down end, be equipped with the upper sealing ring 6 be sealed and matched with the internal face side face of ring-shaped step by annular slot cutting ferrule.The lower end of baffle ring 7 is the screw thread end that screw thread is plugged in the upper port of piston main body 4, the periphery of the upper end of baffle ring 7 is convexly equipped with the annular convex shoulder exposed from the periphery of the necking down end of piston main body 4, the outer of the downside of this annular convex shoulder forms the dynamic gear edge of block above ring-shaped step, the inside edge of the upside of corresponding ring-shaped step be with dynamic keep off edge above-below direction block spacing determine gear edge.
In the present embodiment, the lower end of piston main body 4 is in the keyway of lower contact 1 upper end, ensure to be in the lock state between lower contact 1 and top connection 8, in packer setting process, hydraulic pressure cuts off locking shear pin 5, piston main body 4 and lower contact 1 are unclamped, remove the lock-out state between lower contact 1 and top connection 8, after having set, when needs are given up, clockwise rotating forward tubing string, top connection 8 and lower contact 1 are thrown off, and baffle ring 7 and piston main body 4 are by screwed connection, and the back piston main body 4 that prevents from giving up falls in well.
In the present embodiment, the use procedure of tubing string is as follows:
The first step, safe on-off connector 11 is linked together with pressure transmission pump 10, dropper 12, Y441-152 packer 13 etc., safe on-off connector 11 order of connection is: oil pipe+pressure transmission pump 10+ oil pipe+safe on-off connector 11+ oil pipe+dropper 12+Y441-152 packer 13+ oil pipe+Y341-152 packer 14+ votage control switch 15, is shipped to oil well production design attitude by tubing string pressure transmission pump 10, safe on-off connector 11 etc.;
Second step, connect and suppress pipeline, set packer, the locking pin of safe on-off connector 11 is cut off in the process, anti-rotation switch opens;
3rd step, after having set, when dropper 12 can not realize giving up, rotates forward tubing string, tubing string can be thrown off from safe on-off connector 11 and connect;
4th step, under enter plunger, and close pressure transmission passage, completion is produced.
In other embodiments, fixed gear is along the groove edge that also can be the cannelure that the inwall of fixed cover is offered, and now fixed gear can not occur interfering to moving up and down of spline piston along residing cannelure.Certainly, fixed cover also can plug-in mounting or be installed in spline piston, and now dynamic, fixed gear also needs oppositely along residing inward-outward direction.
In other embodiments, fixed cover also can be an overcoat or inner sleeve that top connection is connected by clockwise thread.
The embodiment of safe on-off connector in the utility model: in the present embodiment, the structure of safe on-off connector is identical with the structure of on-off connector safe in above-described embodiment, therefore repeats no more.
Claims (10)
1. safe on-off connector, comprise dock up and down lower contact, spline piston, the lower end of spline piston and the upper end correspondence of lower contact are provided with the slotting key and keyway that can plug along the vertical direction, spline piston upper sleeve is equipped with the fixed cover connected by locking shear pin, it is characterized in that, the sleeve of spline piston and fixed cover coordinate the dynamic gear edge that wall is respectively equipped with and is on spline piston and be on fixed cover determine gear edge, fixed gear is along the below of block on dynamic gear edge.
2. safe on-off connector according to claim 1, is characterized in that, fixed cover is set on the periphery of spline piston.
3. safe on-off connector according to claim 2, it is characterized in that, spline piston comprises the baffle ring being connected to the piston main body on fixed cover by locking shear pin and being threaded on piston main body, and described dynamic gear is along the annular convex shoulder exposed from the periphery of piston main body for baffle ring or turn edge.
4. safe on-off connector according to claim 3, it is characterized in that, the inwall of fixed cover is convexly equipped with and is in the ring-shaped step of dynamic gear along below, described fixed gear is along the inner ring edge being ring-shaped step top, and the upper end of piston main body is that guiding movement is installed on the necking down end in ring-shaped step along the vertical direction, described dynamic gear is along exposing from the periphery of necking down end.
5. safe on-off connector according to claim 4, it is characterized in that, the outer peripheral face of piston main body is lower large little ledge surface, the segment of piston main body along the vertical direction guiding movement is installed in ring-shaped step, the large section block of piston main body is in the below of ring-shaped step, and the distance between the lower ring end face of ring-shaped step and the periphery step surface of piston main body is not less than the length that slotting key and keyway plug together mutually.
6. safe on-off connector as claimed in any of claims 1 to 5, is characterized in that, fixed cover is the body section of top connection hypomere, and top connection is connected on the periphery of lower contact by fixed cover thread bush.
7. separate zone production tubing string, comprise dropper, packer that safe on-off connector and below thereof are connected in series by oil pipe, safe on-off connector comprise dock up and down lower contact, spline piston, the lower end of spline piston and the upper end correspondence of lower contact are provided with the slotting key and keyway that can plug along the vertical direction, spline piston upper sleeve is equipped with the fixed cover connected by locking shear pin, it is characterized in that, the sleeve of spline piston and fixed cover coordinate the dynamic gear edge that wall is respectively equipped with and is on spline piston and be on fixed cover determine gear edge, fixed gear is along the below of block on dynamic gear edge.
8. separate zone production tubing string according to claim 7, it is characterized in that, fixed cover is set on the periphery of spline piston, spline piston comprises the baffle ring being connected to the piston main body on fixed cover by locking shear pin and being threaded on piston main body, and described dynamic gear is along the annular convex shoulder exposed from the periphery of piston main body for baffle ring or turn edge.
9. separate zone production tubing string according to claim 8, it is characterized in that, the inwall of fixed cover is convexly equipped with and is in the ring-shaped step of dynamic gear along below, described fixed gear is along the inner ring edge being ring-shaped step top, and the upper end of piston main body is that guiding movement is installed on the necking down end in ring-shaped step along the vertical direction, described dynamic gear is along exposing from the periphery of necking down end.
10. the separate zone production tubing string according to claim 7 or 8 or 9, it is characterized in that, fixed cover is the body section of top connection hypomere, top connection is connected on the periphery of lower contact by fixed cover thread bush, and the rotation direction of the connecting thread between upper and lower joint is contrary with the rotation direction of the connecting thread between remaining part in separate zone production tubing string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520604168.3U CN204941371U (en) | 2015-08-12 | 2015-08-12 | A kind of safe on-off connector and use the separate zone production tubing string of this safe on-off connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520604168.3U CN204941371U (en) | 2015-08-12 | 2015-08-12 | A kind of safe on-off connector and use the separate zone production tubing string of this safe on-off connector |
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| Publication Number | Publication Date |
|---|---|
| CN204941371U true CN204941371U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520604168.3U Active CN204941371U (en) | 2015-08-12 | 2015-08-12 | A kind of safe on-off connector and use the separate zone production tubing string of this safe on-off connector |
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| CN (1) | CN204941371U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035702A (en) * | 2017-12-29 | 2018-05-15 | 中国石油大学(华东) | A kind of dismantled and assembled casing protection sets water injection string and structural optimization method |
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2015
- 2015-08-12 CN CN201520604168.3U patent/CN204941371U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035702A (en) * | 2017-12-29 | 2018-05-15 | 中国石油大学(华东) | A kind of dismantled and assembled casing protection sets water injection string and structural optimization method |
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