CN106481288A - A kind of antitorque sealed fitting - Google Patents
A kind of antitorque sealed fitting Download PDFInfo
- Publication number
- CN106481288A CN106481288A CN201611073472.5A CN201611073472A CN106481288A CN 106481288 A CN106481288 A CN 106481288A CN 201611073472 A CN201611073472 A CN 201611073472A CN 106481288 A CN106481288 A CN 106481288A
- Authority
- CN
- China
- Prior art keywords
- thread
- screw thread
- external screw
- leading portion
- piece
- 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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0423—Threaded with plural threaded sections, e.g. with two-step threads
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a kind of antitorque sealed fitting, the external thread piece connecting including two bodys and inner thread piece, leading portion external screw thread and back segment external screw thread are machined with the outer wall of external thread piece, described leading portion external screw thread is inclined to set, described leading portion external screw thread and back segment external screw thread are round thread, it is provided with the first oblique antitorque step surface in external thread piece foremost, the back segment female thread being matched with leading portion external screw thread and back segment external screw thread respectively and leading portion female thread are machined with the inwall of inner thread piece, the front end corresponding to described leading portion female thread on female thread is sequentially provided with inner thread piece second shoulder, inner thread piece first shoulder；It is provided with the second oblique antitorque step surface in the root of inner thread piece, be provided with oil storage escape between leading portion external screw thread and back segment external screw thread.The present invention both ensure that the sealing of joint, in turn ensure that screw thread does not occur thread gluing it is ensured that the bonding strength of screw thread, improves the service life of screw thread.
Description
Technical field
Oil pipes technical field of the present invention, particularly to a kind of antitorque sealed fitting.
Background technology
With the world's drastically riseing to fossil energy demand, current oil exploitation field forward direction deep-well, ultradeep well, high pressure
The direction of extraction of Oil/gas Well, thick oil thermal extraction, directional well etc. progressively develops, and thus the sealing property between petroleum pipeline and connection are strong
Degree is proposed high requirement, while improving sealing, makes screw thread thread gluing not occur, and is hardly damaged screw thread, improves and connects
Intensity is industry technical problem urgently to be resolved hurrily.
Content of the invention
For solving the problems referred to above present in prior art and practical situation, the invention provides a kind of antitorque seal pipe connects
Head, including two bodys connect external thread piece and inner thread piece, the outer wall of external thread piece is machined with leading portion external screw thread and after
Section external screw thread, described leading portion external screw thread is inclined to set, and described leading portion external screw thread and back segment external screw thread are round thread, in external screw thread
Part be provided with the first oblique antitorque step surface foremost；The inwall of inner thread piece is machined with respectively with leading portion external screw thread and back segment
Back segment female thread and leading portion female thread that external screw thread matches, on inner thread piece correspond to described leading portion female thread front end according to
Secondary it is provided with inner thread piece second shoulder, inner thread piece first shoulder；It is provided with the second oblique antitorque step surface in the root of inner thread piece；
It is provided with oil storage escape between leading portion external screw thread and back segment external screw thread.
Preferably, there is one section of smooth annulus between the leading portion female thread of described inner thread piece and inner thread piece second shoulder
Face.
Form radial interference fit between leading portion external screw thread and back segment female thread, define sealing surface；Back segment external screw thread with front
Section female thread between be interference fits, external thread piece foremost first tiltedly antitorque step surface tiltedly resist with the second of inner thread piece root
Turn round step surface and be fitted close formation seal combination face.The function of oil storage escape is to store unnecessary thread compound and make internal thread machining
Withdrawing, setting up of smooth anchor ring avoids stress concentration, prevents screw thread from thread gluing occurring.
The present invention both ensure that the sealing of joint, in turn ensure that screw thread does not occur thread gluing it is ensured that the connection of screw thread is strong
Degree, improves the service life of screw thread.
Brief description
Fig. 1 is the structural representation of the antitorque sealed fitting of the embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is discussed in detail below in conjunction with the accompanying drawings.
Embodiment of the invention discloses that a kind of antitorque sealed fitting, the external thread piece 1 that connects including two bodys and interior
Screw element 2, is machined with leading portion external screw thread 12 and back segment external screw thread 11, described leading portion external screw thread 12 on the outer wall of external thread piece 1
It is inclined to set, described leading portion external screw thread 12 and back segment external screw thread 11 are round thread, be provided with the foremost in external thread piece 1
One oblique antitorque step surface 10；The inwall of inner thread piece 2 is machined with respectively with leading portion external screw thread 12 and back segment external screw thread 11 phase
The back segment female thread of cooperation and leading portion female thread, the front end corresponding to described leading portion female thread on inner thread piece 2 is sequentially provided with
Inner thread piece the second shoulder 3, inner thread piece first shoulder 4；It is provided with the second oblique antitorque step surface in the root of inner thread piece 2,
It is provided with oil storage escape 13 between leading portion external screw thread 12 and back segment external screw thread 11.
There is between the leading portion female thread of described inner thread piece 2 and inner thread piece the second shoulder 3 one section of smooth anchor ring 5.
Finally it should be noted that：The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics.
All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (2)
1. a kind of antitorque sealed fitting, including two bodys connect external thread piece (1) and inner thread piece (2) it is characterised in that
Leading portion external screw thread (12) and back segment external screw thread (11), described leading portion external screw thread (12) are machined with the outer wall of external thread piece (1)
It is inclined to set, described leading portion external screw thread (12) and back segment external screw thread (11) are round thread, in external thread piece (1) foremost
Be provided with the first oblique antitorque step surface (10), the inwall of inner thread piece (2) is machined with respectively with leading portion external screw thread (12) and after
Back segment female thread and leading portion female thread that section external screw thread (11) matches, corresponding to spiral shell in described leading portion on inner thread piece (2)
The front end of stricture of vagina is sequentially provided with inner thread piece second shoulder（3）, inner thread piece first shoulder（4）；Set in the root of inner thread piece (2)
There is the second oblique antitorque step surface, between leading portion external screw thread (12) and back segment external screw thread (11), be provided with oil storage escape（13）.
2. antitorque sealed fitting according to claim 1 is it is characterised in that spiral shell in the leading portion of described inner thread piece (2)
Stricture of vagina and inner thread piece second shoulder（3）Between there is one section of smooth anchor ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073472.5A CN106481288A (en) | 2016-11-29 | 2016-11-29 | A kind of antitorque sealed fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073472.5A CN106481288A (en) | 2016-11-29 | 2016-11-29 | A kind of antitorque sealed fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106481288A true CN106481288A (en) | 2017-03-08 |
Family
ID=58274456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611073472.5A Pending CN106481288A (en) | 2016-11-29 | 2016-11-29 | A kind of antitorque sealed fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106481288A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4705307A (en) * | 1984-09-21 | 1987-11-10 | James B. N. Morris | Tubular goods joint |
| CN203783486U (en) * | 2014-03-27 | 2014-08-20 | 无锡西姆莱斯石油专用管制造有限公司 | Thread gluing prevention drill rod joint |
| CN104812989A (en) * | 2012-09-21 | 2015-07-29 | 瓦卢瑞克石油天然气法国有限公司 | Tubular threaded connection |
| CN105401891A (en) * | 2015-12-16 | 2016-03-16 | 天津钢管集团股份有限公司 | Double-stage thread air-tight seal special thread joint structure for casing pipe |
| CN206205821U (en) * | 2016-11-29 | 2017-05-31 | 无锡金顶石油管材配件制造有限公司 | A kind of antitorque sealed fitting |
-
2016
- 2016-11-29 CN CN201611073472.5A patent/CN106481288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4705307A (en) * | 1984-09-21 | 1987-11-10 | James B. N. Morris | Tubular goods joint |
| CN104812989A (en) * | 2012-09-21 | 2015-07-29 | 瓦卢瑞克石油天然气法国有限公司 | Tubular threaded connection |
| CN203783486U (en) * | 2014-03-27 | 2014-08-20 | 无锡西姆莱斯石油专用管制造有限公司 | Thread gluing prevention drill rod joint |
| CN105401891A (en) * | 2015-12-16 | 2016-03-16 | 天津钢管集团股份有限公司 | Double-stage thread air-tight seal special thread joint structure for casing pipe |
| CN206205821U (en) * | 2016-11-29 | 2017-05-31 | 无锡金顶石油管材配件制造有限公司 | A kind of antitorque sealed fitting |
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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: 20170308 |