CN104727757A - Double-step special threaded casing pipe connecting device - Google Patents
Double-step special threaded casing pipe connecting device Download PDFInfo
- Publication number
- CN104727757A CN104727757A CN201510088314.6A CN201510088314A CN104727757A CN 104727757 A CN104727757 A CN 104727757A CN 201510088314 A CN201510088314 A CN 201510088314A CN 104727757 A CN104727757 A CN 104727757A
- Authority
- CN
- China
- Prior art keywords
- connecting device
- thread
- double
- threads
- threaded casing
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
Abstract
A double-step special threaded casing pipe connecting device comprises an outer connecting device body, an inner connecting device body, elevator clamping grooves, seal grooves, threads, threaded tool withdrawal grooves and O-shaped seal rings. The inner threads of the outer connecting device body and the outer threads of the inner connecting device body are both single threads and are in interference fit with each other; the connecting device is sealed through mechanical sealing and the O-shaped seal ring; the inner threads and the outer threads are each provided with two portions which are distributed in a step mode; the end face of the outer connecting device body makes inward-concaved hard contact with the end face of the inner connecting device body, and the tails of the threads are provided with the O-shaped seal rings; the shoulder of each step is a reverse slope of 15 degrees. The double-step special threaded casing pipe connecting device has the advantages of being high in matching speed, good in reliability, and capable of saving a large amount of operation time.
Description
Technical field
The present invention relates to ocean and land drilling engineering field, particularly relate to a kind of double step specially-threaded casing linkage.
Background technology
Along with the progress of science and technology and people increase the demand of the resource such as oil, colliery, require also more and more higher to the sleeve pipe of drilling well and exploitation.Sleeve pipe used in petroleum drilling and mining be good by body and linkage welding after, coupled together fast by linkage scene and form pipe string, a pipe string inner formation seal cavity.Mine in coal mining also can use sleeve pipe, as vented exhaust, can reach hundreds of rice according to stratum pipe string length different from purposes.In the muddy water of underground, industrial and mineral condition is poor, and the thread failure of a linkage will affect whole piece pipe string.So require higher to the sealing of linkage, intensity and stability.
Current world oil field cover pipe connection used adopts buttress thread, buttless thread, round end screw thread etc. mostly.Conventional threaded design because engagement demand has many defects because this several be threaded after, have gap between screw together between at the bottom of thread crest and tooth, this gap also can be referred to as leakage, makes its sealing effectiveness bad.
Summary of the invention
For avoiding the deficiencies in the prior art, the invention provides a kind of double step specially-threaded casing linkage.
Technical scheme of the present invention is: double step specially-threaded casing linkage, comprises outer connecting device, interior linkage, elevator draw-in groove, seal groove, screw thread, Gewindefreistiche, O RunddichtringO, the internal thread of outer connecting device and the external screw thread of interior linkage are one start screw, interference fit; By mechanical seal, the sealing of O RunddichtringO; Internal thread and external screw thread are two parts, are step distribution; Outer connecting device contacts end face with interior linkage be that indent contacts firmly, and run-out(of thread) is O RunddichtringO; Step place shoulder is reverse 15 ° of slopes.
Described number of starts is no more than 4.
Be fillet at the bottom of described ridge crest and tooth.
Described screw is rectangular thread, and fully teeth height is 0.8 multiplying factor of standard fully teeth height.
Described internal thread and external screw thread are double thread.
Accompanying drawing explanation
Fig. 1 is sleeve pipe outer connecting device schematic diagram of the present invention;
Fig. 2 is linkage schematic diagram in sleeve pipe of the present invention;
Fig. 3 is linkage connection diagram of the present invention;
Fig. 4 is the A place sealing enlarged drawing in Fig. 3;
Fig. 5 is Special threading connector profile of tooth comparison diagram of the present invention.
Wherein 1 is outer connecting device, and 2 is interior linkage, and 3 is elevator draw-in groove, and 4 is seal groove, and 5 is Gewindefreistiche, and 6 is screw thread, and 7 is O RunddichtringO.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further;
Double step specially-threaded casing linkage, comprises outer connecting device 1, interior linkage 2, elevator draw-in groove 3, seal groove 4, screw thread 6, Gewindefreistiche 5, O RunddichtringO 7, the internal thread of outer connecting device 1 and the external screw thread of interior linkage 2 are one start screw, interference fit; Sealed by mechanical seal, O RunddichtringO 7; Internal thread and external screw thread are two parts, are step distribution; Outer connecting device 1 contacts end face with interior linkage 2 be that indent contacts firmly, and screw thread 6 afterbody is O RunddichtringO 7; Step place shoulder is reverse 15 ° of slopes.
Described screw thread 6 numbers are no more than 4.
Be fillet at the bottom of described screw thread 6 sound of baby talk top and tooth.
Described screw is rectangular thread, and fully teeth height is 0.8 multiplying factor of standard fully teeth height.
Described internal thread and external screw thread are double thread.
Claims (5)
1. double step specially-threaded casing linkage, comprises outer connecting device, interior linkage, elevator draw-in groove, seal groove, screw thread, Gewindefreistiche, O RunddichtringO, and the internal thread of outer connecting device and the external screw thread of interior linkage are one start screw, interference fit; By mechanical seal, the sealing of O RunddichtringO; It is characterized in that: internal thread and external screw thread are two parts, is step distribution; Outer connecting device contacts end face with interior linkage be that indent contacts firmly, and run-out(of thread) is O RunddichtringO; Step place shoulder is reverse 15 ° of slopes.
2. double step specially-threaded casing linkage according to claim 1, is characterized in that: described number of starts is no more than 4.
3. double step specially-threaded casing linkage according to claim 1, is characterized in that: be fillet at the bottom of described ridge crest and tooth.
4. double step specially-threaded casing linkage according to claim 1, is characterized in that: described screw is rectangular thread, fully teeth height is 0.8 multiplying factor of standard fully teeth height.
5. double step specially-threaded casing linkage according to claim 1, is characterized in that: described internal thread and external screw thread are double thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510088314.6A CN104727757A (en) | 2015-02-26 | 2015-02-26 | Double-step special threaded casing pipe connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510088314.6A CN104727757A (en) | 2015-02-26 | 2015-02-26 | Double-step special threaded casing pipe connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104727757A true CN104727757A (en) | 2015-06-24 |
Family
ID=53452099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510088314.6A Pending CN104727757A (en) | 2015-02-26 | 2015-02-26 | Double-step special threaded casing pipe connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104727757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833412A (en) * | 2020-06-08 | 2021-12-24 | 中国石油化工股份有限公司 | Threaded joint |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139622Y (en) * | 1992-10-26 | 1993-08-04 | 地质矿产部无锡钻探工具厂 | Elastomer sealing ring sealed drilling rod and joint |
| US20040100098A1 (en) * | 2002-11-21 | 2004-05-27 | Church Kris L. | Hang-free thread design |
| CN101824969A (en) * | 2010-04-09 | 2010-09-08 | 衡阳华菱连轧管有限公司 | Double-shoulder double-sealing face screwed nipple and collar-free oil well pipe using same |
| CN202165026U (en) * | 2011-07-05 | 2012-03-14 | 湖南唯科拓石油科技服务有限公司 | Sealing structure for underground tool pipe joint |
| CN202228002U (en) * | 2011-08-18 | 2012-05-23 | 江苏和信石油机械有限公司 | Double-step drill pipe joint |
| CN202611616U (en) * | 2012-05-28 | 2012-12-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-antitorque and high-seal threaded adapting connector |
| CN202689965U (en) * | 2012-07-16 | 2013-01-23 | 西安摩尔石油工程实验室有限公司 | Air-tight seal oil pipe threaded joint applied to high-temperature and high-pressure gas well |
| CN203285354U (en) * | 2013-04-23 | 2013-11-13 | 中国石油化工股份有限公司 | Petroleum casing pipe threaded connector |
| CN103527107A (en) * | 2013-10-12 | 2014-01-22 | 建湖县永维阀门钻件有限公司 | Bidirectional self-locking type single-start thread marine riser connector |
| CN104131788A (en) * | 2014-07-22 | 2014-11-05 | 江苏和信石油机械有限公司 | High-anti-torque full-sealing drill pipe threaded joint |
| CN203978317U (en) * | 2014-07-22 | 2014-12-03 | 江苏和信石油机械有限公司 | Many shoulders high resistance torque drill rod screw connection |
-
2015
- 2015-02-26 CN CN201510088314.6A patent/CN104727757A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139622Y (en) * | 1992-10-26 | 1993-08-04 | 地质矿产部无锡钻探工具厂 | Elastomer sealing ring sealed drilling rod and joint |
| US20040100098A1 (en) * | 2002-11-21 | 2004-05-27 | Church Kris L. | Hang-free thread design |
| CN101824969A (en) * | 2010-04-09 | 2010-09-08 | 衡阳华菱连轧管有限公司 | Double-shoulder double-sealing face screwed nipple and collar-free oil well pipe using same |
| CN202165026U (en) * | 2011-07-05 | 2012-03-14 | 湖南唯科拓石油科技服务有限公司 | Sealing structure for underground tool pipe joint |
| CN202228002U (en) * | 2011-08-18 | 2012-05-23 | 江苏和信石油机械有限公司 | Double-step drill pipe joint |
| CN202611616U (en) * | 2012-05-28 | 2012-12-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-antitorque and high-seal threaded adapting connector |
| CN202689965U (en) * | 2012-07-16 | 2013-01-23 | 西安摩尔石油工程实验室有限公司 | Air-tight seal oil pipe threaded joint applied to high-temperature and high-pressure gas well |
| CN203285354U (en) * | 2013-04-23 | 2013-11-13 | 中国石油化工股份有限公司 | Petroleum casing pipe threaded connector |
| CN103527107A (en) * | 2013-10-12 | 2014-01-22 | 建湖县永维阀门钻件有限公司 | Bidirectional self-locking type single-start thread marine riser connector |
| CN104131788A (en) * | 2014-07-22 | 2014-11-05 | 江苏和信石油机械有限公司 | High-anti-torque full-sealing drill pipe threaded joint |
| CN203978317U (en) * | 2014-07-22 | 2014-12-03 | 江苏和信石油机械有限公司 | Many shoulders high resistance torque drill rod screw connection |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833412A (en) * | 2020-06-08 | 2021-12-24 | 中国石油化工股份有限公司 | Threaded joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150624 |