CN102337848A - Locking mechanism for expansion cone - Google Patents
Locking mechanism for expansion cone Download PDFInfo
- Publication number
- CN102337848A CN102337848A CN2010102363389A CN201010236338A CN102337848A CN 102337848 A CN102337848 A CN 102337848A CN 2010102363389 A CN2010102363389 A CN 2010102363389A CN 201010236338 A CN201010236338 A CN 201010236338A CN 102337848 A CN102337848 A CN 102337848A
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- elastic claw
- boss
- expansion
- expansion cone
- plug
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Abstract
The invention relates to a locking mechanism for an expansion cone. In the locking mechanism, an expansion tube and a screwed plug are connected through a thread; an annular boss of the upper part of the screwed plug is supported against the lower end part of the expansion tube; an expansion cone is positioned on the upper part inside the expansion tube, a conical surface at the upper end of the expansion cone is blocked on the conical surface of the expansion tube corresponding to the expansion cone; two bosses are arranged on the lower end face of the expansion cone, and correspond to the two bosses which are arranged on the upper end face of the screwed plug; one end of an elastic claw structure is connected with the expansion cone through a thread, and an outer boss at the upper end of the elastic claw structure is blocked at the boss at the lower end of the expansion cone; an elastic claw of the elastic claw structure is positioned in the screwed plug; one end of a working barrel is positioned in elastic claw of the elastic claw structure, and the upper end part of the working barrel is supported against the boss in the elastic claw structure and is in pin joint with the elastic claw structure through a shear pin; and a conical boss is arranged on the end part of the elastic claw of the elastic claw structure, is blocked on the conical surface on the inner cylinder of the screwed plug, and is pressed by the boss on the working barrel. According to the locking mechanism, the early expansion of the expansion tube due to the fact that the expansion tube has overlarge tubular column weight or is repeatedly lifted and dropped can be avoided.
Description
Technical field
The present invention relates to a kind of oil development with down-hole mechanical instrument expansion cone retaining mechanism.
Background technology
Expansion tube subsidy is at present reinforced in tubing string and the expansion tube completion tubular column, and working string (drilling rod or oil pipe) links to each other with expansion cone usually, expansion tube tubing string weight be suspended on its with the conical surface that expansion cone contacts on.The axial force that expansion cone tubing string weight produces when playing lower tubular column acts directly on the expansion cone, and is excessive when expansion tube tubing string weight, puts on repeatedly when the expansion tube tubing string is met card in the down-hole to put tubing string and cause expansion cone in advance expansion tube to be expanded.
Summary of the invention
The purpose of this invention is to provide a kind of expansion cone retaining mechanism; Transformation through the axial force transmission path; Avoid upper lifting force with working string to act directly on expansion cone and the conical surface that expansion tube contacts; Avoid excessive, put on repeatedly when the expansion tube tubing string is met card in the down-hole and put tubing string and cause expansion cone in advance expansion tube to be expanded when expansion tube tubing string weight; After expansion tube puts in place, throw in plug, plug is with after seating nipple combines, and the releasing seating nipple can carry out follow-up expansion tube expansion operation to the locking of bullet pawl and expansion cone.
Expansion cone retaining mechanism of the present invention is made up of expansion tube, expansion cone, elastic claw structure, seating nipple, plug, shear pin, sealing ring; Expansion tube and plug are through being threaded, and the annular boss on plug top withstands the bottom of expansion tube, seals through sealing ring; Expansion cone is positioned at the expansion tube internal upper part, and the conical surface of expansion cone upper end is stuck in the expansion tube conical surface place corresponding with it, and the expansion cone lower surface is provided with two boss, and is corresponding with two boss that the plug upper surface is provided with; Elastic claw structure one end is connected with expansion cone through screw thread, and the outer lug boss of elastic claw structure upper end is stuck in the boss place of expansion cone lower end; The elastic claw of elastic claw structure is arranged in plug; Seating nipple one end is positioned at the elastic claw of elastic claw structure, and the upper end of seating nipple withstands on the boss place in the elastic claw structure, through the pin-and-hole pin joint on shear pin and the elastic claw structure outer lug boss; The elastic claw end of elastic claw structure is a conical surface boss, is stuck in the conical surface place on the plug inner core, is held out against by the boss on the seating nipple, and boss on the seating nipple and plug inwall are sealed by sealing ring; The seating nipple inwall is designed with the jump ring groove.
When expansion tube is normally gone into well; Working string (drilling rod or oil pipe) is connected on the expansion cone, and the upper lifting force of working string is through expansion cone, and expansion cone passes to the elastic claw structure through connecting thread with this power again; Because the effect of shear pin; Seating nipple is pressed on the elastic claw of elastic claw structure on the inner core conical surface of plug, and the upper lifting force of working string is passed to plug, and plug passes to expansion tube through screw thread with upper lifting force again.Transformation through the axial force transmission path; Thereby avoided upper lifting force with working string to act directly on expansion cone and the conical surface that expansion tube contacts; It is excessive when expansion tube tubing string weight that the design of this power bang path has been avoided, and puts on repeatedly when expansion tube is met card in the down-hole to put the expansion cone that causes easily and in advance expansion tube is expanded.When expansion tube be lowered to put in place after, in working string (drilling rod or oil pipe), throw in plug, plug combines with seating nipple under action of hydraulic force; The seating nipple inwall is designed with the jump ring groove, prevents from seating nipple, to withdraw from after plug from putting in place, continues to suppress; When pressure reaches design pressure; Seating nipple is cut off shear pin to the motion of the direction in shaft bottom, the lose the job support of tube of the elastic claw of elastic claw structure, and elastic claw reclaims; When pressure continue to raise, expansion cone was carried the elastic claw structure to the expansion tube operation of expanding.Mutual when chimeric when the boss of the upper end of the lower end of expansion cone and plug, can be the shaft mouth operation tubing string and connect expansion cone reaction torque is provided.
Transformation through the axial force transmission path; Thereby avoided upper lifting force with working string to act directly on expansion cone and the conical surface that expansion tube contacts; It is excessive when expansion tube weight that the design of this power bang path has been avoided, and puts on repeatedly when expansion tube is met card in the down-hole to put the expansion cone that tubing string causes and in advance expansion tube is expanded; After expansion tube puts in place, throw in plug, plug is with after seating nipple combines, and the releasing seating nipple can carry out follow-up expansion tube expansion operation to the locking of bullet pawl and expansion cone.
Description of drawings
Fig. 1 expansion cone locking mechanism structure sketch map.
Fig. 2 elastic claw mechanism structure sketch map.
Fig. 3 expansion cone structural representation.
Fig. 4 plug structural representation.
Wherein: 1-expansion tube, 2-expansion cone, 3-elastic claw structure, 4-seating nipple, 5-plug, 6-shear pin, 7-sealing ring, 8-sealing ring.
The specific embodiment
Expansion cone retaining mechanism of the present invention is by expansion tube 1, expansion cone 2, elastic claw structure 3, seating nipple 4, plug 5, shear pin 6, and sealing ring constitutes; Expansion tube 1 and plug 5 are through being threaded, and the bottom that the annular boss on plug 5 tops withstands expansion tube 1 is through sealing ring 7 sealings; Expansion cone 2 is positioned at expansion tube 1 internal upper part, and the conical surface of expansion cone 2 upper ends is stuck in expansion tube 1 conical surface place corresponding with it, and expansion cone 2 lower surfaces are provided with two boss, and is corresponding with two boss that plug 5 upper surfaces are provided with; Elastic claw structure one end is connected with expansion cone 2 through screw thread, and the outer lug boss of elastic claw structure upper end is stuck in the boss place of expansion cone 2 lower ends; The elastic claw of elastic claw structure is arranged in plug 5; Seating nipple 4 one ends are positioned at the elastic claw of elastic claw structure, and the upper end of seating nipple 4 withstands on the boss place in the elastic claw structure, through the pin-and-hole pin joint on shear pin 6 and the elastic claw structure outer lug boss; The elastic claw end of elastic claw structure is a conical surface boss, is stuck in the conical surface place on the plug inner core, is held out against by the boss on the seating nipple 4, and boss on the seating nipple 4 and plug 5 inwalls are by sealing ring 8 sealings; The seating nipple inwall is designed with the jump ring groove.
Claims (1)
1. an expansion cone retaining mechanism is made up of expansion tube, expansion cone, elastic claw structure, seating nipple, plug, shear pin, sealing ring; It is characterized in that: expansion tube and plug are through being threaded, and the annular boss on plug top withstands the bottom of expansion tube, seals through sealing ring; Expansion cone is positioned at the expansion tube internal upper part, and the conical surface of expansion cone upper end is stuck in the expansion tube conical surface place corresponding with it, and the expansion cone lower surface is provided with two boss, and is corresponding with two boss that the plug upper surface is provided with; Elastic claw structure one end is connected with expansion cone through screw thread, and the outer lug boss of elastic claw structure upper end is stuck in the boss place of expansion cone lower end; The elastic claw of elastic claw structure is arranged in plug; Seating nipple one end is positioned at the elastic claw of elastic claw structure, and the upper end of seating nipple withstands on the boss place in the elastic claw structure, through the pin-and-hole pin joint on shear pin and the elastic claw structure outer lug boss; The elastic claw end of elastic claw structure is a conical surface boss, is stuck in the conical surface place on the plug inner core, is held out against by the boss on the seating nipple, and boss on the seating nipple and plug inwall are sealed by sealing ring; The seating nipple inwall is designed with the jump ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102363389A CN102337848A (en) | 2010-07-22 | 2010-07-22 | Locking mechanism for expansion cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102363389A CN102337848A (en) | 2010-07-22 | 2010-07-22 | Locking mechanism for expansion cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102337848A true CN102337848A (en) | 2012-02-01 |
Family
ID=45513773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102363389A Pending CN102337848A (en) | 2010-07-22 | 2010-07-22 | Locking mechanism for expansion cone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102337848A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015935A (en) * | 2012-12-24 | 2013-04-03 | 中国石油天然气股份有限公司 | Top-down pull rod type expansion pipe structure |
| CN106703731A (en) * | 2016-11-22 | 2017-05-24 | 中海油能源发展股份有限公司 | Locking and sealing device for quick butt joint of expansion cone and implementation method |
| CN107013183A (en) * | 2017-05-31 | 2017-08-04 | 中国石油集团西部钻探工程有限公司 | Tail pipe plug device |
| CN108526148A (en) * | 2018-06-14 | 2018-09-14 | 中铁工程装备集团盾构制造有限公司 | Self-advancing type, spinning shield machine slip casting channel high pressure dredger and system |
Citations (6)
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| CN200985759Y (en) * | 2006-12-25 | 2007-12-05 | 长庆石油勘探局 | Expansion casing tube device having cushioning capacity |
| CN201090161Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | New type connection and sealing structure for expansion tube |
| CN201090146Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | Connecting apparatus for new type expansion tube |
| CN201460778U (en) * | 2009-07-30 | 2010-05-12 | 中国石油天然气股份有限公司 | Expansion pipe type tail pipe hanger |
| CN101718179A (en) * | 2009-12-23 | 2010-06-02 | 中国石油天然气集团公司 | Safe setting method of expansion pipe |
| CN201778671U (en) * | 2010-07-22 | 2011-03-30 | 中国石油天然气股份有限公司 | Locking mechanism of expansion cone |
-
2010
- 2010-07-22 CN CN2010102363389A patent/CN102337848A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200985759Y (en) * | 2006-12-25 | 2007-12-05 | 长庆石油勘探局 | Expansion casing tube device having cushioning capacity |
| CN201090161Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | New type connection and sealing structure for expansion tube |
| CN201090146Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | Connecting apparatus for new type expansion tube |
| CN201460778U (en) * | 2009-07-30 | 2010-05-12 | 中国石油天然气股份有限公司 | Expansion pipe type tail pipe hanger |
| CN101718179A (en) * | 2009-12-23 | 2010-06-02 | 中国石油天然气集团公司 | Safe setting method of expansion pipe |
| CN201778671U (en) * | 2010-07-22 | 2011-03-30 | 中国石油天然气股份有限公司 | Locking mechanism of expansion cone |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015935A (en) * | 2012-12-24 | 2013-04-03 | 中国石油天然气股份有限公司 | Top-down pull rod type expansion pipe structure |
| CN103015935B (en) * | 2012-12-24 | 2015-10-14 | 中国石油天然气股份有限公司 | One is rod-pulling type expansion pipe structure from top to bottom |
| CN106703731A (en) * | 2016-11-22 | 2017-05-24 | 中海油能源发展股份有限公司 | Locking and sealing device for quick butt joint of expansion cone and implementation method |
| CN107013183A (en) * | 2017-05-31 | 2017-08-04 | 中国石油集团西部钻探工程有限公司 | Tail pipe plug device |
| CN108526148A (en) * | 2018-06-14 | 2018-09-14 | 中铁工程装备集团盾构制造有限公司 | Self-advancing type, spinning shield machine slip casting channel high pressure dredger and system |
| CN108526148B (en) * | 2018-06-14 | 2023-12-05 | 中铁工程装备集团盾构制造有限公司 | Self-feeding type self-rotating shield machine grouting channel high-pressure dredging device and system |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120201 |