CN2651421Y - Tail pipe prestressed well completion device - Google Patents
Tail pipe prestressed well completion device Download PDFInfo
- Publication number
- CN2651421Y CN2651421Y CN 03284804 CN03284804U CN2651421Y CN 2651421 Y CN2651421 Y CN 2651421Y CN 03284804 CN03284804 CN 03284804 CN 03284804 U CN03284804 U CN 03284804U CN 2651421 Y CN2651421 Y CN 2651421Y
- Authority
- CN
- China
- Prior art keywords
- tail pipe
- ball seat
- piston
- completion
- ball
- 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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Abstract
The utility model relates to a tail pipe prestress completion device for oil drilling engineering, particularly the thermal production well completion, which is composed of a back-off joint 1, a suspending main body 2, a slips 3, a liquid cylinder 4, a coupling 5, a piston 6, a steel ball 7, a ball holder 8, a ball holder nail 9, a pup joint 10, a ball holder guard rail 11, an anchoring spud body 12, a thrust ring 13, a thrust pin shaft 14, a suspension link 15, a fluke 16 and a fluke shaft 17. The device is reliable and practical for working and easy for operation, which push the suspending mechanism and anchoring mechanism to act relying on the hydraulic pressure action, so as to accomplish the tail pipe prestress completion. By utilizing the device, people can prevent and resolve the damage for the steam injection tail pipe well bushing pipe, so as to prolong the service life of the tail pipe well and lower the cost for oil field exploitation.
Description
Technical field:
The utility model relates to a kind of particularly downhole hardware of thermal production well completion of petroleum drilling engineering that is used for.
Background technology:
The viscous crude field thermal production well is owing to inject 300～350 ℃ of superheated steams, and sleeve pipe extends under the thermal stress effect.In order to prevent sleeve pipe to damage, the thermal production well that routine is drilled to generally adopts the prestressing method completion, applies certain pulling force for the oil reservoir sleeve pipe at well head during completion, makes its elongation, sits and hangs over well head, promptly applies certain prestressing force, with the damage of prevention sleeve pipe.Carrying out along with oilfield development process, a large amount of liner completion methods (comprising sidetracked hole) are used, but because tail pipe (production string) is suspended on the intermediate casing, tieback is not to well head, make prestressing technique to implement, cause a large amount of distortion of tail pipe thermal production well production string, bad break, cause well water, shake out, even scrap, make the oilfield exploitation cost increase.
Summary of the invention: the purpose of this utility model is to provide a kind of tail pipe prestressing force completion system that can reduce the damage of thermal recovery tail pipe casing, prolongation thermal recovery tail pipe well life-span, reduce the oilfield exploitation cost.
The utility model is to realize like this.This kind completion system comprises the hitch on top and the anchor mechanism two large divisions of bottom, hitch is made up of back-off joint, suspension main body, removable slips, fluid cylinder, under the pump function of ground, by hanging the eyelet on the main body, liquid promotes to drive slips and moves upward; Be provided with the conical surface owing to hang main body, make that slips is protruding to contact interlock, make hitch be suspended on the intermediate casing with the oil well intermediate casing; By the back-off joint, the top drilling tool can be tripped out in the well, finish the suspension of tail pipe.Anchor mechanism is made up of box cupling, piston, steel ball, ball seat, ball seat shear pin, connection pipe nipple, ball seat guardrail, grappling body, thrust ring, thrust bearing pin, draw ring, anchor fluke, anchor fluke axle, its course of work is: under pump function, steel ball promotes descent of piston, promoting anchor fluke by thrust ring, thrust bearing pin and draw ring opens, the grappling on tail pipe and stratum is realized on the wedging stratum.The course of work of this device is as follows in the whole tail pipe prestressing force completion construction: under the effect of ground pump pressure, promote steel ball and drive descent of piston, strut anchor fluke wedging stratum; Lift prestressing force by drilling tool on ground, reach predetermined tonnage, improve pump pressure, hitch is suspended on the intermediate casing; Continue to improve pump pressure and cut off the ball seat pin, ball seat is pushed the ball seat guardrail, discharge the ground pump pressure; By the back-off joint, drilling tool is left, in well, trip out drilling tool, tail pipe prestressing force well completion work is finished.
The utility model reliable operation, practicality, easy operating, the hitch and the anchor mechanism that rely on hydraulic action to promote wherein produce action, finish tail pipe prestressing force completion, utilize this device can prevent and solve heat extraction by steam injection tail pipe casing and damage problem, thereby prolong the tail pipe well life-span, reduce the oilfield exploitation cost.
Description of drawings: Fig. 1 is a general structure schematic diagram of the present utility model.Fig. 2 is the structural representation under this device busy state.Number in the figure " 18 " is a drilling tool, and " 19 " are intermediate casing, and " 20 " are tail pipe, and " 21 " are the stratum.
The specific embodiment: enforcement of the present utility model is illustrated below in conjunction with accompanying drawing.As shown in the figure, the utility model is made up of back-off joint 1, suspension main body 2, slips 3, fluid cylinder 4, box cupling 5, piston 6, steel ball 7, ball seat 8, ball seat shear pin 9, pipe nipple 10, ball seat guardrail 11, grappling body 12, thrust ring 13, thrust bearing pin 14, draw ring 15, anchor fluke 16, anchor fluke axle 17, its structure assembled relation is as follows: hang main body 2 upper ends with the back-off joint 1 that has been threaded, the lower end is connected with tail pipe 20, hangs main body 2 outsides and is provided with removable slips 3 and fluid cylinder 6; Constitute the hitch part of this device with upper-part; Box cupling 5 upper ends are connected with tail pipe 20, and the lower end is hinged with a pipe nipple 10, pipe nipple 10 lower ends tipping grappling body 12; Be provided with piston 6 in box cupling 5, the pipe nipple 10, be provided with steel ball 7 and ball seat 8 in the piston 6, ball seat 8 is provided with ball seat shear pin 9 with piston 6 sidewalls and is connected and fixed, and ball seat 8 belows are provided with ball seat guardrail 11; Be provided with thrust ring 13 in the piston 6 below grappling bodies 12, grappling body 13 is provided with thrust bearing pin 14, is set with two draw rings 15 on it, is set in two anchor fluke 16 tops on the anchor fluke axle 17 with the below respectively and is hinged; Constitute the anchor mechanism part of this device with upper-part.Wherein, hang main body 2 and be as general as a cylinder, its upper and lower end is respectively equipped with internal thread, and a undergauge section is arranged at periphery top, and its below is a up big and down small conical surface, and the conical surface outside is set with slips 3, below is the face of cylinder.Piston 6 is a hollow circular cylinder, the step that matches with steel ball 6, ball seat 7 that its top inner headed face is provided with round platform, and the middle part is provided with ball seat guardrail 10.Thrust ring 12 is one to be provided with cylinder.Grappling body 11 is the externally threaded pipe body of band internal thread lower end, upper end band, and its middle part is provided with a thrust pin axis hole and two anchor fluke axis holes, respectively in order to suit thrust bearing pin 14, and draw ring 15 and anchor fluke 16, side-wall hole is so that draw ring 15 and anchor fluke 16 open.
Claims (1)
1, a kind of tail pipe prestressing force completion system, by back-off joint (1), hang main body (2), slips (3), fluid cylinder (4), box cupling (5), piston (6), steel ball (7), ball seat (8), ball seat shear pin (9), pipe nipple (10), ball seat guardrail (11), grappling body (12), thrust ring (13), thrust bearing pin (14), draw ring (15), anchor fluke (16), anchor fluke axle (17) is formed, it is characterized in that: hang main body (2) upper end and be connected to back-off joint (1) with screw thread, the lower end is connected with tail pipe (20), hangs main body (2) outside and is provided with removable slips (3) and fluid cylinder (6); Box cupling (5) upper end is connected with tail pipe (20), and the lower end is hinged with a pipe nipple (10), pipe nipple (10) lower end tipping grappling body (12); Be provided with piston (6) in box cupling (5), the pipe nipple (10), be provided with steel ball (7) and ball seat (8) in the piston (6), ball seat (8) is provided with ball seat shear pin (9) with piston (6) sidewall and is connected and fixed, and ball seat (8) below is provided with ball seat guardrail (11); Be provided with thrust ring (13) in piston (6) the below grappling body (12), grappling body (13) is provided with thrust bearing pin (14), is set with two draw rings (15) on it, and anchor fluke (16) top that is set on two anchor fluke axles (17) with the below is hinged respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03284804 CN2651421Y (en) | 2003-08-19 | 2003-08-19 | Tail pipe prestressed well completion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03284804 CN2651421Y (en) | 2003-08-19 | 2003-08-19 | Tail pipe prestressed well completion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2651421Y true CN2651421Y (en) | 2004-10-27 |
Family
ID=34332999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03284804 Expired - Fee Related CN2651421Y (en) | 2003-08-19 | 2003-08-19 | Tail pipe prestressed well completion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2651421Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913161A (en) * | 2012-11-16 | 2013-02-06 | 西安鼎盛石油科技有限责任公司 | Straightening and anchoring device applied to horizontal open hole well |
| CN106437587A (en) * | 2016-08-31 | 2017-02-22 | 吉林大学 | Highly pressurized liquid driven eccentric sheave type bottom hole sleeve cutter |
-
2003
- 2003-08-19 CN CN 03284804 patent/CN2651421Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913161A (en) * | 2012-11-16 | 2013-02-06 | 西安鼎盛石油科技有限责任公司 | Straightening and anchoring device applied to horizontal open hole well |
| CN106437587A (en) * | 2016-08-31 | 2017-02-22 | 吉林大学 | Highly pressurized liquid driven eccentric sheave type bottom hole sleeve cutter |
| CN106437587B (en) * | 2016-08-31 | 2018-11-27 | 吉林大学 | High pressure liquid drives eccentric wheel type shaft bottom casing ripper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |