CN203081366U - Expansion suspending device of under-cut release - Google Patents
Expansion suspending device of under-cut release Download PDFInfo
- Publication number
- CN203081366U CN203081366U CN 201220733537 CN201220733537U CN203081366U CN 203081366 U CN203081366 U CN 203081366U CN 201220733537 CN201220733537 CN 201220733537 CN 201220733537 U CN201220733537 U CN 201220733537U CN 203081366 U CN203081366 U CN 203081366U
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- expansion
- under
- cone
- cut
- male
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Abstract
The utility model relates to an expansion suspending device of an under-cut release. The expansion suspending device of the under-cut release comprises a releasing mechanism and an expansion mechanism, wherein the expansion mechanism is mainly composed of an expansion cone shaft, an expansion cone and a central pipe, the releasing mechanism is an under-cut releasing mechanism and comprises a bearing shaft, the bearing shaft is connected below the expansion cone shaft, under-cut male threads are installed outside the bearing shaft in a sleeved mode, and the under-cut male threads and the bearing shaft are connected through a key groove and form axial sliding matching. A double-male connector is installed outside the under-cut male threads in a sleeved mode, and the inner wall of the double male connector is meshed with the under-cut male threads through under-cut female threads. A bearing is arranged at the butt-joint position of the lower end of the expansion cone shaft and the bearing shaft, the lower portion of the bearing is connected with a spring sleeve and is in butt joint with the double-male connector. The expansion suspending device of the under-cut release has the advantages of having two releasing modes, enabling a user to select a releasing mode according to the situation of a scene and to rapidly place the under-cut threads near a point of centralization, and improving reliability of the release of the expansion suspending device.
Description
Technical field
The utility model relates to the expansion suspension arrangement that a kind of back-off in oil drilling completion system field is given up.
Background technology
Development along with drilling technologies such as deep-well, horizontal well, Multilateral Wells, sidetracked holes, the liner completion The Application of Technology more and more widely, under a lot of situations, adopt conventional hanger to be difficult to the needs that satisfy construction and produce to these wells, as be difficult to obtain bigger hanger latus rectum, can not be effectively horn mouth be implemented sealing, sometimes even cause great down-hole accident.The tail tube hanging completion technique runs into increasing technical barrier, is mainly caused by the hanger unreasonable structure: it is relatively poor that conventional hanger hangs the back sealing performance, and nearly the waterpower leakage can appear in 45%～60% conventional hanger after sitting extension; Existing hanger easily causes to sit in advance at the casing job circulation time and hangs; The hitch of hanger, particularly slip system is unreasonable, easily causes to hang to lose efficacy; The back-off mode is single, and the serious accident of button takes place not open easily.And in stub liner, be difficult to judge whether out button, cause the construction success rate to descend.
The expansion hanger integrates the hanging function of conventional hanger and the sealing function of external packer of pipe, can replace conventional hanger and external packer of pipe.Its technical advantage that has is as follows: (1) possesses good sealed suspension function, solves the annular space leakage problem of the above overlay segment of sidetracked hole window fully, makes overlay segment reduce conventional completion small casing use amount significantly less than 10m.(2) because good sealing and suspension behavior makes bore hole tail pipe and big sleeve pipe form a complete integral body.When the window's position is selected, can farthest reduce near starting some water layer to the influence of window, thereby reduce the length of barefoot interval significantly, reduce drilling cost and completion casing expense.(3) the expansion hanger adopts integral structure, does not have mechanisms such as slips, and interior latus rectum is much larger than matching used sleeve pipe.But existing expansion hanger need dispose special releasing gadget, and the releasing gadget poor stability, brings constant to construction.
The utility model content
The purpose of this utility model is an advantage of having used for reference the expansion hanger, for improving the success rate of liner completion, satisfies the needs of special well completion construction, has proposed the expansion suspension arrangement that a kind of back-off is given up.
The technical solution of the utility model is: comprise releasing gadget and mainly constitute expansion mechanism by the expansion axis of cone, expansion cone, central tube, it is characterized in that: described releasing gadget is the back-off releasing gadget, it comprises the bearing shaft that is connected expansion axis of cone below, the outside suit back-off male thread of bearing shaft, be connected by keyway between back-off male thread and the bearing shaft and form axial sliding fit, in the two male joints of the outside suit of back-off male thread, two male joint inwalls are by back-off box thread and the engagement of back-off male thread.
Such scheme further comprises: in expansion axis of cone lower end and bearing shaft joint bearing is set, docks with two male joints behind the connection spring housing under the bearing.
The junction of the central tube lower end and the expansion axis of cone is extended with the expansion cone positioning joint downwards, and the expansion cone positioning joint forms spacing the cooperation with expansion cone.
Expansion cone positioning joint and expansion cone (9) form spacing the cooperation by the concave, convex slot of axial setting.
Or expansion cone positioning joint and expansion cone (9) by spline axially is set, spline forms spacing the cooperation.
Outstanding advantage of the present utility model is: the expansion suspension arrangement that provides dual mode to give up mode; A kind of mode is looked for the point of neutralization of the screw thread of giving up by auxiliary bodies such as spring housing, bearings, applies certain pressure loading, carries out back-off and gives up; Another kind of mode adopts on the screw thread point of neutralization, on put forward certain load, carry out back-off and give up.
When carrying the mode back-off in the employing and giving up, the back-off screw thread is placed the point of neutralization, on put forward certain load, rotate the top drilling tool, key shape structure and back-off male thread on the bearing shaft are coupled, the drive screw thread of giving up just changes.The screw thread of giving up is a left hand thread, and along with the rotation of rotating disk, back-off joint and expansion hanger are thrown off, and the operation of giving up is finished.On the pressurization central tube screw thread with accompany pipe string and link to each other, can by the pressurization central tube realize that the machinery of expansion cone pressurize and on put forward function.Be processed with key shape structure on the bearing shaft, can be coupled by key shape structure and back-off male thread and realize back-off.
Employing presses down the mode back-off when giving up, press down certain load, the male thread of back-off screw thread can endwisely slip on bearing shaft, thereby make the back-off screw thread not bear pulling force in the axial direction and also do not bear pressure, just be in " point of neutralization " state, rotate the top drilling tool, key shape structure and back-off male thread on the bearing shaft are coupled, and driving the back-off screw thread just changes.The back-off screw thread is a left hand thread, and along with the rotation of rotating disk, back-off joint and expansion hanger are thrown off, and the operation of giving up is finished.
After back-off is given up, propose piping tool in central tube string and the expansion hanger, only leave expansion tube in the well.
This releasing gadget adopts and is threaded in addition, and its releasing gadget supporting capacity is big, can bear up to a hundred tons load; Can be implemented in to press down and give up under the loading or give up, can select the mode of giving up, improve the reliability that the expansion hanger is given up according to field condition last carrying under the loading.Can fast the back-off screw thread be placed near the point of neutralization, improve the success rate of the operation of giving up, reduce the possibility that back-off is given up and failed.
Description of drawings
Fig. 1 is a kind of structural representation of exemplary embodiments.
Wherein: 1. the 6. pair male joint 7. bearings 8. rubber tubes 9. expansion cone 10. expansion axis of cone 11. spring housings of central tube and expansion cone positioning joint 2. back-off male threads 3. bearing shaft 4. back-off box threads, 5. expansion hangers (being expansion tube)
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description.
Expansion tube hangs the expansion operation by expansion mechanism, back-off releasing device, cementing system, hanger urceolus formations such as (or claiming expansion tube).Expansion mechanism mainly is made of the expansion axis of cone 10, expansion cone 9, expansion cone positioning joint 1 etc.Wherein, expansion cone 9 is installed on the expansion axis of cone 10, whole expansion mechanism is positioned at the top of expansion tube tubing string, carry under the effect of load on hydraulic coupling reaches, expansion mechanism is along axially moving upward, with expansion tube 5 expanded radiallys, the rubber tube 8(of expansion tube top sulfuration is usually according to the requirement at scene, rubber tube is generally the 3-4 section) be compressed between expansion tube and the outer layer sleeve inwall, the decrement of rubber tube is generally about 30%, has formed the sealing and the suspension of expansion suspension arrangement like this.The back-off releasing device is positioned at the bottom of expansion tube tubing string, mainly is made of bearing 7, bearing shaft 3, spring housing 11, two male joint 6, back-off male thread 2 and back-off box thread 4 etc.Be processed with key shape structure on the bearing shaft 3, back-off male thread 2 can endwisely slip on bearing shaft 3, and the key shape structure on the bearing shaft 3 cooperates with back-off screw thread male thread 2, under the rotation of top drilling tool, can produce reversing torque, thereby back-off male thread 2, back-off box thread 4 back-offs are given up.
Back-off box thread 4 in two male joints 6 and 2 engagements of back-off male thread, back-off male thread 2 can short-rangely endwisely slip on bearing shaft 3, and the shackle moment of torsion of back-off box thread 4 and back-off male thread 2 passes to back-off male thread 2 by bearing shaft and realizes.Spring housing 11 is connected with bearing 7, adopts when pressing down the mode back-off, and whole tubing string weight can be applied on the bearing 7, thereby back-off box thread 4 and back-off male thread 2 are easy to back-off not bearing axial force.
This hanger carried out the back-off operation of giving up earlier before carrying out cementing and expand to sit hanging, this back-off releasing device can adopt to be carried or press down dual mode and give up.
When carrying the mode back-off in the employing and giving up:
At first adopt central tube expansion hanger system to be lowered into the hanging position of design, on the basis of point of neutralization load (this moment, back-off male thread 2 and back-off box thread 4 were in the point of neutralization position of whole center tubing string), on put forward the certain load of central tube, because of the male thread 2 of back-off screw thread can endwisely slip on bearing shaft 3, the load that back-off male thread 2 and back-off box thread 4 bear is zero or very little axial tension, just changeing the top drilling tool then, the key shape structure on the bearing shaft 3 and the male thread 2 of back-off screw thread are coupled, and the male thread 2 that drives the back-off screw thread is just changeing.Back-off male thread 2 and back-off box thread 4 are left hand thread, and along with the rotation of drilling tool, the operation of giving up of male thread of back-off screw thread 2 and box thread 4 back-offs, thereby two male joints 6 disengagements on back-off male thread 2 and back-off box thread 4 and the expansion hanger 5, back-off is finished.
If under some complex situations, when the mode of carrying in the employing can not normally be given up, can consider that employing presses down the mode back-off and gives up:
After expansion hanger system is lowered into the hanging position of design, on the basis of point of neutralization load (this moment, the back-off screw thread was in the point of neutralization position of whole center tubing string), press down the certain load of central tube.When employing pressed down the mode back-off, whole tubing string weight can be applied on the bearing 7, thereby back-off box thread 4 and back-off male thread 2 are easy to back-off not bearing axial force.Because of the male thread 2 of back-off screw thread can endwisely slip on bearing shaft 3, the load that back-off male thread 2 and back-off box thread 4 bear is zero or very little axial compression, just changeing the top drilling tool then, drilling tool drives bearing 7 and bearing shaft 3 is just being changeed, under the drive of key shape structure on the bearing shaft, the male thread 2 that drives the back-off screw thread is just changeing.Back-off male thread 2 and back-off box thread 4 are left hand thread, and along with the rotation of drilling tool, the operation of giving up of male thread of back-off screw thread 2 and box thread 4 back-offs, thereby two male joints 6 disengagements of back-off male thread 2 and back-off box thread 4 and expansion hanger 5, back-off is finished.
After adopting above-mentioned any mode back-off to finish to give up, suppress by central tube from ground fluid pressure is acted on the expansion cone 7, expansion cone 7 is endwisely slipped along central tube in expansion hanger 5, thereby make expansion hanger 5 that permanent plastic deformation radially take place, rubber tube 8 on the hanger body is combined closely with the outer layer sleeve inwall, thus the purpose that reaches sealing and hang.
Claims (5)
1. expansion suspension arrangement that back-off is given up, comprise releasing gadget and mainly by the expansion axis of cone (10), expansion cone (9), central tube (1) constitutes expansion mechanism, it is characterized in that: described releasing gadget is the back-off releasing gadget, it comprises the bearing shaft (3) that is connected the expansion axis of cone (10) below, the outside suit back-off male thread (2) of bearing shaft (3), be connected by keyway between back-off male thread (2) and the bearing shaft (3) and form axial sliding fit, in the two male joints (6) of the outside suit of back-off male thread (2), two male joints (6) inwall is by back-off box thread (4) and back-off male thread (2) engagement.
2. the expansion suspension arrangement of giving up according to the described back-off of claim 1 is characterized in that: in the expansion axis of cone (10) lower end and bearing shaft (3) joint bearing (7) is set, docks with two male joints (6) behind the connection spring housing (11) under the bearing (7).
3. the expansion suspension arrangement of giving up according to claim 1 or 2 described back-offs, it is characterized in that: the junction of central tube (1) lower end and the expansion axis of cone (10) is extended with the expansion cone positioning joint downwards, and the expansion cone positioning joint forms spacing the cooperation with expansion cone (9).
4. the expansion suspension arrangement that back-off according to claim 3 is given up is characterized in that: expansion cone positioning joint and expansion cone (9) form spacing the cooperation by the concave, convex slot of axial setting.
5. the expansion suspension arrangement that back-off according to claim 3 is given up is characterized in that: expansion cone positioning joint and expansion cone (9) by spline axially is set, spline forms spacing the cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733537 CN203081366U (en) | 2012-12-28 | 2012-12-28 | Expansion suspending device of under-cut release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733537 CN203081366U (en) | 2012-12-28 | 2012-12-28 | Expansion suspending device of under-cut release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203081366U true CN203081366U (en) | 2013-07-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220733537 Expired - Fee Related CN203081366U (en) | 2012-12-28 | 2012-12-28 | Expansion suspending device of under-cut release |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203081366U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156051A (en) * | 2014-06-09 | 2015-12-16 | 中国石油化工股份有限公司 | Releasing device |
| CN110905428A (en) * | 2019-12-17 | 2020-03-24 | 淮安市井神钻采机具有限公司 | Composite super-expansion cementing liner hanger |
-
2012
- 2012-12-28 CN CN 201220733537 patent/CN203081366U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156051A (en) * | 2014-06-09 | 2015-12-16 | 中国石油化工股份有限公司 | Releasing device |
| CN105156051B (en) * | 2014-06-09 | 2019-04-05 | 中国石油化工股份有限公司 | Releasing device |
| CN110905428A (en) * | 2019-12-17 | 2020-03-24 | 淮安市井神钻采机具有限公司 | Composite super-expansion cementing liner hanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151106 Address after: 100728 No. 22 North Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: Sinopec Corp. Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: Sinopec Corp. Patentee before: Well-Drilling Technology Inst., Shengli Petroleum Administration, SINOPEC |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20201228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |