CN101839379A - Threaded connection method of steel tubes - Google Patents
Threaded connection method of steel tubes Download PDFInfo
- Publication number
- CN101839379A CN101839379A CN201010183024A CN201010183024A CN101839379A CN 101839379 A CN101839379 A CN 101839379A CN 201010183024 A CN201010183024 A CN 201010183024A CN 201010183024 A CN201010183024 A CN 201010183024A CN 101839379 A CN101839379 A CN 101839379A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- oil pipe
- male thread
- thread
- factory
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 title claims description 14
- 239000010959 steel Substances 0.000 title claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a threaded connection method of oil tubes or sleeves used in an oil field. An oil tube or sleeve factory end or an oil tube or sleeve field end and a box coupling are included in the method, wherein the end part of the oil tube or sleeve factory end is provided with a male thread, the end part of the oil tube or sleeve field end is provided with a male thread, and the box coupling is provided with a female thread; the end face of the oil tube or sleeve factory end, which is provided with a male thread, mutually and directly contacts with the end face of the oil tube or sleeve field end, which is provided with a male thread; the male threads of the oil tube or sleeve factory end and the oil tube or sleeve field end are right-hand screw threads or left-hand screw threads simultaneously; the screw pitch of the male thread of the oil tube or sleeve factory end is smaller than that of the male thread of the oil tube or sleeve field end; or the rotation directions of the male threads of the oil tube or sleeve factory end and the oil tube or sleeve field are reverse. The invention overcomes technical bias, enables the small end face of the male thread of the oil tube or sleeve factory end to directly contact the small end face of the male thread of the oil tube or sleeve field end and makes the connection sealing property of oil tubes or sleeves be better.
Description
Technical field
The invention discloses the oil pipe of a kind of oil field use or the threaded connection method of sleeve pipe.
Background technique
At present, the connecting means of known oil pipe or sleeve pipe has following three kinds:
1, the inclined to one side bodily form screw thread of the round thread of API and API, clearly the male thread of regulation oil pipe or sleeve field end 2 screw threads can not be run into the male thread small end end face of oil pipe or sleeve factory end 1 screw thread and contacts in their connect, and the API standard is controlled with the J value.(see figure 1)
2, in order to improve the comprehensive switching performance of oil pipe, sleeve pipe, sealability, join strength.Torque resistant performance, and bending resistance.Invented the connection of the special thread of oil pipe, sleeve pipe.But the male thread small end end face of oil pipe or sleeve field end 2 screw threads does not all have directly to contact with the male thread small end end face of oil pipe or sleeve factory end 1 screw thread, is that a torque resistant step by box cupling 3 box threads separates.(see figure 2)
3, the inclined to one side bodily form screw thread of the round thread of API and API, the steel pipe body end face of the screw thread small end of the steel pipe body end face of the screw thread small end of oil pipe or sleeve field end 2 screw threads and oil pipe or sleeve factory end 1 screw thread in they connect, open with a pad 4, form half special thread and connect.(see figure 3)
Can not why oil pipe or the male thread small end end face of sleeve factory end screw thread and the male thread small end end face of oil pipe or sleeve field end screw thread directly contact in being threaded? its reason is: during the execute-in-place of oil field, the male thread small end of the scene end screw thread of oil pipe or sleeve pipe is relative box cupling box thread turn clockwise (the box thread box cupling of this moment and the steel pipe of oil pipe or sleeve factory end screw thread are non-rotary motionless) when advancing, as long as the male thread small end end face of oil pipe or sleeve field end screw thread male thread small end end face and oil pipe or sleeve factory end screw thread takes place to contact, will produce frictional force this moment in the contacting point, the steel pipe that this frictional force will make oil pipe or sleeve factory end male thread just oil pipe or sleeve pipe itself relatively box thread (this moment, the box thread box cupling was motionless) be rotated counterclockwise, oil pipe or the sleeve factory end male thread originally tightened in plant produced are rotated loosening withdrawing from, oil pipe or casing threads are connected lost efficacy and cause the crushing accident that well is ruined.
Above oil pipe, there is following shortcoming in being threaded of sleeve pipe:
1, the combination property that is threaded of API standard is poor;
2, special thread connects because box thread has an outstanding torque resistant step to make whole Thread Machining Process complicated, and processing cost is improved greatly.
3, half special thread switching performance improve little, and the intermediate washer loss that comes off easily, Security is not enough.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and overcome technology prejudice, make the male thread small end end face of the male thread small end end face of factory's end screw thread and oil pipe or sleeve field end screw thread can directly contact, make the threaded connection method of the better sleeve pipe of sealability, oil pipe.
According to technological scheme provided by the invention, the threaded connection method of described steel pipe, comprise oil pipe or sleeve factory end, oil pipe or sleeve field end and box cupling, the end of oil pipe or sleeve factory end has male thread, the end of oil pipe or sleeve field end has male thread, box cupling has box thread, one end box thread of the male thread of oil pipe or sleeve factory end and box cupling is spirally connected, the other end box thread of the male thread of oil pipe or sleeve field end and box cupling is spirally connected, the end face that oil pipe or sleeve factory end have male thread is directly to contact mutually with the end face that oil pipe or sleeve field end have male thread, and the male thread of the male thread of oil pipe or sleeve factory end and oil pipe or sleeve field end is right-handed thread or left-handed thread simultaneously, and the pitch of the male thread of oil pipe or sleeve factory end is less than the pitch of the male thread of oil pipe or sleeve field end.
The male thread small end end face of oil pipe or sleeve field end and oil pipe or sleeve factory end is the axial interference of formation, the radial interference that closely contacts mutually.
Perhaps, the threaded connection method of described steel pipe, comprise oil pipe or sleeve factory end, oil pipe or sleeve field end and box cupling, the end of oil pipe or sleeve factory end has male thread, the end of oil pipe or sleeve field end has male thread, box cupling has box thread, one end box thread of the male thread of oil pipe or sleeve factory end and box cupling is spirally connected, the other end box thread of the male thread of oil pipe or sleeve field end and box cupling is spirally connected, the end face that oil pipe or sleeve factory end have male thread is directly to contact mutually with the end face that oil pipe or sleeve field end have male thread, and oil pipe or sleeve factory end are opposite with the male thread sense of rotation of oil pipe or sleeve field end.
The male thread small end end face of oil pipe or sleeve field end and oil pipe or sleeve factory end is the axial interference of formation, the radial interference that closely contacts mutually.
The present invention has overcome technology prejudice, makes the male thread small end end face of factory's end screw thread and the male thread small end end face of oil pipe or sleeve field end screw thread directly to contact, and makes that the connection sealability of oil pipe or sleeve pipe is better.
Description of drawings
Fig. 1 is the structural representation of the inclined to one side bodily form screw thread of the round thread of API of description of the Prior Art and API.
Fig. 2 is the structural representation that the special thread of the oil pipe of description of the Prior Art or sleeve pipe connects.
Fig. 3 is the structural representation of the inclined to one side bodily form screw thread of the round thread of API of description of the Prior Art and API.
Fig. 4 is the structural representation of the embodiment of the invention 1.
Fig. 5 is the structural representation of the embodiment of the invention 2.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
A kind of sleeve pipe, the threaded connection method of oil pipe, comprise oil pipe or sleeve factory end 1, oil pipe or sleeve field end 2 and box cupling 3, the end of oil pipe or sleeve factory end 1 has male thread, the end of oil pipe or sleeve field end 2 has male thread, box cupling 3 has box thread, one end box thread of the male thread of oil pipe or sleeve factory end 1 and box cupling 3 is spirally connected, the other end box thread of the male thread of oil pipe or sleeve field end 2 and box cupling 3 is spirally connected, the end face that oil pipe or sleeve factory end 1 have male thread is directly to contact mutually with the end face that oil pipe or sleeve field end 2 have male thread, and the male thread of the male thread of oil pipe or sleeve factory end 1 and oil pipe or sleeve field end 2 is right-handed thread or left-handed thread simultaneously, and the pitch of the male thread of oil pipe or sleeve factory end 1 is less than the pitch of the male thread of oil pipe or sleeve field end 2.
The male thread small end end face of oil pipe or sleeve field end 2 and oil pipe or sleeve factory end 1 is the axial interference of formation, the radial interference that closely contacts mutually.
For example, in specification is that 9 " 5/8; wall thickness 11.99mm; grade of steel P110; box cupling 3 has box thread, the male thread of oil pipe or sleeve factory end 1 is connected with the box thread of box cupling 3 one ends, and the male thread of oil pipe or sleeve field end 2 is connected with the box thread of box cupling 3 the other ends; the male thread of the male thread of oil pipe or sleeve factory end 1 and oil pipe or sleeve field end 2 is right-handed thread simultaneously, and thread tooth is the inclined to one side bodily form of API.The thread pitch of oil pipe or sleeve factory end 1 is 6 tooth/inches (4.23mm), the thread pitch of oil pipe or sleeve field end 2 is 5 tooth/inches (5.08mm), the male thread small end end face of oil pipe or sleeve field end 2 and oil pipe or sleeve factory end 1 be mutually closely contact be formed with axial interference, radial interference respectively two 15 ° of steps and 20 ° of metallic sealing sections), see Fig. 4.
A kind of sleeve pipe, the threaded connection method of oil pipe, comprise oil pipe or sleeve factory end 1, oil pipe or sleeve field end 2 and box cupling 3, the end of oil pipe or sleeve factory end 1 has male thread, the end of oil pipe or sleeve field end 2 has male thread, box cupling 3 has box thread, one end box thread of the male thread of oil pipe or sleeve factory end 1 and box cupling 3 is spirally connected, the other end box thread of the male thread of oil pipe or sleeve field end 2 and box cupling 3 is spirally connected, the end face that oil pipe or sleeve factory end 1 have male thread is directly to contact mutually with the end face that oil pipe or sleeve field end 2 have male thread, and oil pipe or sleeve factory end 1 are opposite with the male thread sense of rotation of oil pipe or sleeve field end 2.
The male thread small end end face of oil pipe or sleeve field end 2 and oil pipe or sleeve factory end 1 is the axial interference of formation, the radial interference that closely contacts mutually.
For example, in specification is that 2 " 7/8; wall thickness 5.51mm; grade of steel P110, box cupling 3 has box thread, and the male thread of oil pipe or sleeve factory end 1 is connected with the box thread of box cupling 3 one ends; the male thread of oil pipe or sleeve field end 2 is connected with the box thread of box cupling 3 the other ends; the male thread of oil pipe or sleeve factory end 1 is a right-handed thread, and the male thread of oil pipe or sleeve field end 2 is left-handed thread simultaneously, and thread tooth is a hook-type.The pitch of the male thread of oil pipe or sleeve factory end 1 is 8 tooth/inches (3.175mm), the male thread pitch of oil pipe or sleeve field end 2 is 6 tooth/inches (4.23mm), the male thread small end end face of oil pipe or sleeve field end 2 and oil pipe or sleeve factory end 1 is the 0 ° of step of an axial interference of formation that closely contacts mutually, sees Fig. 5.
Claims (4)
1. the threaded connection method of a steel pipe, comprise oil pipe or sleeve factory end (1), oil pipe or sleeve field end (2) and box cupling (3), the end of oil pipe or sleeve factory end (1) has male thread, the end of oil pipe or sleeve field end (2) has male thread, box cupling (3) has box thread, one end box thread of the male thread of oil pipe or sleeve factory end (1) and box cupling (3) is spirally connected, the other end box thread of the male thread of oil pipe or sleeve field end (2) and box cupling (3) is spirally connected, it is characterized in that: the end face that oil pipe or sleeve factory end (1) have male thread is directly to contact mutually with the end face that oil pipe or sleeve field end (2) have male thread, and the male thread of the male thread of oil pipe or sleeve factory end (1) and oil pipe or sleeve field end (2) is right-handed thread or left-handed thread simultaneously, and the pitch of the male thread of oil pipe or sleeve factory end (1) is less than the pitch of the male thread of oil pipe or sleeve field end (2).
2. the threaded connection method of steel pipe according to claim 1 is characterized in that: the male thread small end end face of oil pipe or sleeve field end (2) and oil pipe or sleeve factory end (1) is the axial interference of formation, the radial interference that closely contacts mutually.
3. the threaded connection method of a steel pipe, comprise oil pipe or sleeve factory end (1), oil pipe or sleeve field end (2) and box cupling (3), the end of oil pipe or sleeve factory end (1) has male thread, the end of oil pipe or sleeve field end (2) has male thread, box cupling (3) has box thread, one end box thread of the male thread of oil pipe or sleeve factory end (1) and box cupling (3) is spirally connected, the other end box thread of the male thread of oil pipe or sleeve field end (2) and box cupling (3) is spirally connected, it is characterized in that: the end face that oil pipe or sleeve factory end (1) have male thread is directly to contact mutually with the end face that oil pipe or sleeve field end (2) have male thread, and oil pipe or sleeve factory end (1) are opposite with the male thread sense of rotation of oil pipe or sleeve field end (2).
4. the threaded connection method of steel pipe according to claim 1 is characterized in that: the male thread small end end face of oil pipe or sleeve field end (2) and oil pipe or sleeve factory end (1) is the axial interference of formation, the radial interference that closely contacts mutually.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010183024A CN101839379A (en) | 2010-05-25 | 2010-05-25 | Threaded connection method of steel tubes |
| CN2010102996254A CN102031936A (en) | 2010-05-25 | 2010-10-08 | Threaded connection structure of steel tubes |
| PCT/CN2011/000595 WO2011147189A1 (en) | 2010-05-25 | 2011-04-06 | Thread connection structure for steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010183024A CN101839379A (en) | 2010-05-25 | 2010-05-25 | Threaded connection method of steel tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101839379A true CN101839379A (en) | 2010-09-22 |
Family
ID=42742946
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010183024A Pending CN101839379A (en) | 2010-05-25 | 2010-05-25 | Threaded connection method of steel tubes |
| CN2010102996254A Pending CN102031936A (en) | 2010-05-25 | 2010-10-08 | Threaded connection structure of steel tubes |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102996254A Pending CN102031936A (en) | 2010-05-25 | 2010-10-08 | Threaded connection structure of steel tubes |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN101839379A (en) |
| WO (1) | WO2011147189A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031936A (en) * | 2010-05-25 | 2011-04-27 | 陆金福 | Threaded connection structure of steel tubes |
| CN102116135A (en) * | 2011-02-14 | 2011-07-06 | 江苏常宝钢管股份有限公司 | Looseness-proof high-air tightness connecting structure with threaded sleeves |
| CN110043196A (en) * | 2019-04-11 | 2019-07-23 | 中国石油天然气集团有限公司 | A kind of oil well pipe male connection end face seal coil structures and its assembly method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20150217A1 (en) * | 2015-02-13 | 2016-08-15 | Arne Barrett Sele | Threaded connector |
| CN112824642A (en) * | 2019-11-20 | 2021-05-21 | 宝山钢铁股份有限公司 | Buttress thread joint with high anti-thread gluing performance |
| US11614186B1 (en) | 2020-03-25 | 2023-03-28 | PTC Liberty Tubulars LLC | Box connection for a pin with relieved thread region |
| CN111456649B (en) * | 2020-04-10 | 2021-09-14 | 大安市鸿聚石油钻采有限公司 | Special casing pipe nipple for oil well |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397484A (en) * | 1982-04-16 | 1983-08-09 | Mobil Oil Corporation | Locking coupling system |
| US4762344A (en) * | 1985-01-30 | 1988-08-09 | Lee E. Perkins | Well casing connection |
| JP3767668B2 (en) * | 1999-08-27 | 2006-04-19 | 住友金属工業株式会社 | Threaded joint for oil well pipe |
| CN1178015C (en) * | 1999-09-16 | 2004-12-01 | 西德尔卡有限公司 | Screwed connection with high safety and stability |
| US6406070B1 (en) * | 2000-11-03 | 2002-06-18 | Grant Prideco, Lp | Casing drilling connector with low stress flex groove |
| US6817633B2 (en) * | 2002-12-20 | 2004-11-16 | Lone Star Steel Company | Tubular members and threaded connections for casing drilling and method |
| US7347459B2 (en) * | 2004-04-30 | 2008-03-25 | Gb Tubulars, Inc. | Coupling for drilling-with-casing operations |
| US7438329B2 (en) * | 2005-01-11 | 2008-10-21 | V&M Atlas Bradford, Lp | Methods and connections for coupled pipe |
| CN101839379A (en) * | 2010-05-25 | 2010-09-22 | 陆金福 | Threaded connection method of steel tubes |
-
2010
- 2010-05-25 CN CN201010183024A patent/CN101839379A/en active Pending
- 2010-10-08 CN CN2010102996254A patent/CN102031936A/en active Pending
-
2011
- 2011-04-06 WO PCT/CN2011/000595 patent/WO2011147189A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031936A (en) * | 2010-05-25 | 2011-04-27 | 陆金福 | Threaded connection structure of steel tubes |
| WO2011147189A1 (en) * | 2010-05-25 | 2011-12-01 | Lu Jinfu | Thread connection structure for steel tube |
| CN102116135A (en) * | 2011-02-14 | 2011-07-06 | 江苏常宝钢管股份有限公司 | Looseness-proof high-air tightness connecting structure with threaded sleeves |
| CN102116135B (en) * | 2011-02-14 | 2016-09-07 | 江苏常宝钢管股份有限公司 | Looseness-proof high-air tightness connecting structure with threaded sleeves |
| CN110043196A (en) * | 2019-04-11 | 2019-07-23 | 中国石油天然气集团有限公司 | A kind of oil well pipe male connection end face seal coil structures and its assembly method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102031936A (en) | 2011-04-27 |
| WO2011147189A1 (en) | 2011-12-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Open date: 20100922 |