CN201502336U - Special thread oil casing connector - Google Patents
Special thread oil casing connector Download PDFInfo
- Publication number
- CN201502336U CN201502336U CN2009202272749U CN200920227274U CN201502336U CN 201502336 U CN201502336 U CN 201502336U CN 2009202272749 U CN2009202272749 U CN 2009202272749U CN 200920227274 U CN200920227274 U CN 200920227274U CN 201502336 U CN201502336 U CN 201502336U
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- CN
- China
- Prior art keywords
- thread
- connector
- screw thread
- female adapter
- angle
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a special thread oil casing connector with metallic seal, which is applicable to high-pressure oil and gas wells. The connector consists of a male connector (2) and a female connector (1), and is characterized in that the dentoform of internal and external threads (3) are improved buttress threads; the thread loading angle Alpha is equal to 3 degrees and the stab side angle Beta is equal to 10 degrees; the fit position of the tread front end of the male connector (2) and the thread bottom end of the female connector (1) is provided with a metal sealing face (5), the seal form is conical surface-conical surface structure form, and the conical degree of the fit position of the metal sealing face (5) is 1:16 or 1:20; the tread end part of the male connector (2) and the thread bottom of the female connector (1) are provided with reverse torque steps (7), and the angle Theta is equal to 10-15 degrees; and the female connector (1) is coupling type or externally thickened direct-linking type or no-thickening direct-linking type. The special thread oil casing connector has simple structure, easy processing and measurement, strong pipe connection strength, hard thread gluing and good sealing performance, and is applicable for popularization and application in oil fields.
Description
Technical field
The utility model relates to a kind of special thread oil sleeve joint, is a kind of special thread oil sleeve joint that has metallic seal, is applicable to that high-pressure oil-gas well uses.
Background technology
At present, its thread forms of tubing and casing of using during domestic oil field development is produced mainly is API standard round nipple or buttress thread joint, in order to be applicable to the needs of high-pressure oil-gas well, oil well pipe manufacturer develops the special thread oil sleeve joint in succession both at home and abroad, and WAM, FOX, TDS button-type etc. are arranged.The FOX button-type adopts variable pitch screw to cooperate, and causes the processing detection difficult, and production efficiency is low, and in addition, the sealing surface that is made of three sections different arc surfaces of radius on the inner thread piece needs special-purpose molding cutter processing, and tool wear is fast, the processing cost height.Chinese patent CN96223Q34.0 discloses a kind of " oil well pipe thread joint ", its hermetically-sealed construction is the modified on TDS type sealing basis, the external thread piece front end has column sealed by the guiding of end circular arc chamfering, by the guiding of arc transition face interior column sealed is arranged beyond the inner thread piece inner face screw thread, two sealing surface interference fit constitute the primary seal part, its primary seal of nipple is not subjected to the influence of axial tension, has good sealing effectiveness, primary seal part interference fit required precision height, dimensional tolerance range is little, if tolerance is amplified, then make its magnitude of interference excessive or too small, cause thread gluing or seal failure, so difficulty of processing is big, product percent of pass is low.
Summary of the invention
The purpose of this utility model provides a kind of excellent sealing ability that has, and is easy to processing and detects, higher, the on-the-spot a kind of particular oils thread compound casing joint easy to use of processed finished products rate.
The purpose of this utility model is achieved in that it is made up of male connection, female adapter, male connection is processed as external screw thread, female adapter is processed with internal thread, and its internal and external threads tooth form is the modified buttress thread, its screw thread carrying angle α=3 °; Go into to detain side angle=10 °, there is a metallic sealing section male connection screw thread front end and cooperation place, female adapter screw thread bottom, its seal form is the conical surface-cone structure form, the tapering of metallic sealing section cooperation place is 1: 16 or 1: 20, the male connection end and the female adapter bottom of thread have a reverse moment of torsion step, angle is θ=10～15 °, and a transition conical surface is arranged between male connection screw thread and the sealing surface, and there is a fillet R sealing surface and moment of torsion step end face angle
3=0.4～0.8mm, female adapter bottom of thread sealing surface and moment of torsion step end face angle fillet R
2=0.2～0.4mm has a transition arc R between female adapter screw thread and the end sealing surface
1=1～3mm, female adapter is box cupling type or external upset (EU) direct-connection type or does not thicken direct-connection type.
The utility model is simple in structure, is easy to processing and measurement, and pipe linking intensity height is not easy thread gluing, and good seal performance is suitable for the oil field to be applied.
Description of drawings
Fig. 1, this real new structure schematic diagram
Fig. 2, the utility model I part enlarged drawing
Fig. 3, the utility model II part enlarged drawing
SpecificallyEmbodiment
Below in conjunction with accompanying drawing this practicality newly is described in detail:
The utility model is by male connection (2), female adapter (1) is formed, male connection (2) is processed as external screw thread, female adapter (1) is processed with internal thread, in it, external screw thread (3) tooth form is the modified buttress thread, its screw thread carrying angle α=3 °, go into to detain side angle=10 °, there is a metallic sealing section (5) male connection (2) screw thread front end and cooperation place, female adapter (1) screw thread bottom, its seal form is the conical surface-cone structure form, the tapering of metallic sealing section (5) cooperation place is 1: 16 or 1: 20, male connection (2) thread head and female adapter (2) bottom of thread have a reverse moment of torsion step (7), angle is θ=10～15 °, the one transition conical surface (9) is arranged between male connection (2) screw thread (3) and the sealing surface (10), and sealing surface (10) has a fillet R with moment of torsion step end face (11) angle
3=0.4～0.8mm, female adapter (1) bottom sealing surface (6) and moment of torsion step end face (8) angle fillet R
2=0.2～0.4mm has a transition conical surface (4) between female adapter (1) screw thread (3) and the sealing surface (6), the transition conical surface (4) has a transition arc R with sealing surface (6)
1=1～3mm, female adapter (1) is for box cupling type or external upset (EU) direct-connection type or do not thicken direct-connection type.
Claims (3)
1. special thread oil sleeve joint, it is by male connection (2), female adapter (1) is formed, in it is characterized in that, external screw thread (3) tooth form is the modified buttress thread, its screw thread carrying angle α=3 °, go into to detain side angle=10 °, there is a metallic sealing section (5) male connection (2) screw thread front end and cooperation place, female adapter (1) screw thread bottom, its seal form is the conical surface-cone structure form, the tapering of metallic sealing section (5) cooperation place is 1: 16 or 1: 20, male connection (2) thread head and female adapter (2) bottom of thread have a reverse moment of torsion step (7), and angle is θ=10～15 °.
2. according to the described a kind of special thread oil sleeve joint of claim 1, it is characterized in that a transition conical surface (9) is arranged between male connection (2) screw thread (3) and the sealing surface (10), sealing surface (10) has a fillet R with moment of torsion step end face (11) angle
3=0.4～0.8mm, female adapter (1) bottom sealing surface (6) and moment of torsion step end face (8) angle fillet R
2=0.2～0.4mm has a transition conical surface (4) between female adapter (1) screw thread (3) and the end sealing surface (6), between the transition conical surface (4) and the sealing surface (6) a transition arc R is arranged
1=1～3mm.
3. according to the described a kind of special thread oil sleeve joint of claim 1, it is characterized in that female adapter (1) is box cupling type or external upset (EU) direct-connection type or does not thicken direct-connection type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202272749U CN201502336U (en) | 2009-10-05 | 2009-10-05 | Special thread oil casing connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202272749U CN201502336U (en) | 2009-10-05 | 2009-10-05 | Special thread oil casing connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201502336U true CN201502336U (en) | 2010-06-09 |
Family
ID=42453272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202272749U Expired - Fee Related CN201502336U (en) | 2009-10-05 | 2009-10-05 | Special thread oil casing connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201502336U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012003645A1 (en) * | 2010-07-07 | 2012-01-12 | 天津天钢石油专用管制造有限公司 | Tubular thread connector for oil and gas industries |
| CN102587844A (en) * | 2012-03-27 | 2012-07-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread pipe coupling |
| CN104563904A (en) * | 2014-12-31 | 2015-04-29 | 达力普石油专用管有限公司 | Sealing connecting structure of casing of gas well |
| CN110607997A (en) * | 2019-10-30 | 2019-12-24 | 澳普洛钻探工具(无锡)有限公司 | Internal thread structure of sealing drill rod |
-
2009
- 2009-10-05 CN CN2009202272749U patent/CN201502336U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012003645A1 (en) * | 2010-07-07 | 2012-01-12 | 天津天钢石油专用管制造有限公司 | Tubular thread connector for oil and gas industries |
| CN102587844A (en) * | 2012-03-27 | 2012-07-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread pipe coupling |
| CN102587844B (en) * | 2012-03-27 | 2015-04-15 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread pipe coupling |
| CN104563904A (en) * | 2014-12-31 | 2015-04-29 | 达力普石油专用管有限公司 | Sealing connecting structure of casing of gas well |
| CN110607997A (en) * | 2019-10-30 | 2019-12-24 | 澳普洛钻探工具(无锡)有限公司 | Internal thread structure of sealing drill rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20151005 |
|
| EXPY | Termination of patent right or utility model |