CN203729903U - Extremely-high anti-torsional thread connection device - Google Patents
Extremely-high anti-torsional thread connection device Download PDFInfo
- Publication number
- CN203729903U CN203729903U CN201320844660.9U CN201320844660U CN203729903U CN 203729903 U CN203729903 U CN 203729903U CN 201320844660 U CN201320844660 U CN 201320844660U CN 203729903 U CN203729903 U CN 203729903U
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- thread
- external
- internal thread
- bead surface
- circular bead
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Abstract
The utility model provides an extremely-high anti-torsional thread connection device. The extremely-high anti-torsional thread connection device comprises an external thread connector and an internal thread connector, wherein the external thread connector is provided with an external thread outer shoulder surface, an external thread section and an external thread front shoulder surface, and the internal thread connector is provided with an internal thread inner end face, an internal thread section and an internal thread outer sealing surface. The extremely-high anti-torsional thread connection device achieves four-surface contact; when the extremely-high anti-torsional thread connection device is used, the internal thread outer sealing surface makes contact with the external thread outer shoulder surface, and the internal thread inner end face makes contact with the external thread front shoulder surface. The extremely-high anti-torsional thread connection device has the advantages that under the circumstance that the external diameters of the connectors are reduced, anti-torsional strength of thread connection is enhanced; compared with conventional API threads, the anti-torsional strength is enhanced by about 50%-70%, and increasingly-complex well drilling requirements can be met.
Description
Technical field
The utility model relates to a kind of being threaded of using in oil gas well drilling process, especially a kind of high antitorque screw connection.
Background technology
In oil natural gas exploitation exploration industry, drill string is the important tool of drilling well, it is to connect ground and underground hinge, when drilling well, transmit the needed energy of fractured rock by it, apply the pressure of the drill to shaft bottom, and carry flushing fluid etc. in well, in drilling process, the work of drill bit, the situation of well, and the various variations of down-hole formation, be reflected on ground by drill string and various instrument often, in drilling process, drill string is mainly make a trip and normally creep under these two kinds of conditions and work, in the time making a trip, drill string does not contact shaft bottom, whole drill string is in the outstanding state of holding, under Gravitative Loads, the straight line stable state of drill string in Tensile, in the time normally creeping into, because the weight of part drill string is applied on drill bit as the pressure of the drill, make lower drilling string by compression, under the operating mode of rotation, act on the power on drill string, except pulling force and pressure, also has the centrifugal force producing due to rotation, under multiple alternating compound stress effect, easily there is fatigue failure in drill string, according to the design theory of API standard, tool joint thread is generally 0.8 for the torsional strength ratio of body, and lower than this numerical value, the failure accidents such as fracture easily occur joint screw thread.
Utility model content
The purpose of this utility model is that a kind of high antitorque screw connection is provided for fear of the deficiencies in the prior art.
The technical solution adopted in the utility model is: a kind of high antitorque screw connection, comprise the male connection with the outer circular bead surface of external screw thread, external thread section and external screw thread front end circular bead surface, and there is the female adapter of internal thread inner face, internal thread segment and internal thread external seal face, described screw connection has four face contacts, when use, internal thread external seal face contacts with the outer circular bead surface of external screw thread, and internal thread inner face contacts with external screw thread front end circular bead surface.
Described internal thread inner face is more than or equal to the distance of internal thread external seal face that outside external screw thread, circular bead surface is to the distance of external screw thread front end circular bead surface, and its difference is 0-0.25mm.
The outer circular bead surface of described external screw thread is to the long 12.7-25.4 mm of external thread length of the distance of the external screw thread front end circular bead surface same outer diameter more listed than API standard.
The range of taper of external thread section be 1:8 to 1:16, the range of taper of internal thread segment is that 1:8 is to 1:16.
Thread tooth height is 3.5-3.9 mm, and thread tooth width is 1.7-2.4 mm, and tooth top arc radius is 1.05-1.25 mm.
The utility model has the advantages that in the situation that has reduced joint external diameter, improved the torsional strength being threaded; Compared with the conventional screw thread of API, torsional strength has improved about 50%-70%, can meet day by day complicated drilling well demand.
Brief description of the drawings
Fig. 1 is the high antitorque screw connection figure of the utility model.
Fig. 2 is the partial enlarged drawing of form of thread of the present utility model.
Wherein 1 is female adapter, 2 is male connection, and 3 is internal thread inner face, and 4 is external screw thread front end circular bead surface, 5 is internal thread external seal face, 6 is the outer circular bead surface of external screw thread, and 7 is form of thread, and 8 is external thread section, 9 is internal thread segment, 21 is profile of tooth height, and 25 is profile of tooth width, and 24 is tooth top arc radius.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
A kind of high antitorque screw connection, comprise the male connection 2 with the outer circular bead surface 6 of external screw thread, external thread section 8 and external screw thread front end circular bead surface 4, and there is the female adapter 1 of internal thread inner face 3, internal thread segment 9 and internal thread external seal face 5, described screw connection has four face contacts, when use, internal thread external seal face 5 contacts with the outer circular bead surface 6 of external screw thread, and internal thread inner face 3 contacts with external screw thread front end circular bead surface 4.
Described internal thread inner face 3 is more than or equal to the distance of circular bead surface outside external screw thread 6 to external screw thread front end circular bead surface 4 to the distance of internal thread external seal face 5, and its difference is 0-0.25mm.
The outer circular bead surface 6 of described external screw thread is to the long 12.7-25.4 mm of external thread length of the distance of external screw thread front end circular bead surface 4 same outer diameter more listed than API standard.
The range of taper of external thread section 8 be 1:8 to 1:16, the range of taper of internal thread segment 9 is that 1:8 is to 1:16.
Thread tooth height 21 is 3.5-3.9 mm, and thread tooth width 25 is 1.7-2.4 mm, and tooth top arc radius 24 is 1.05-1.25 mm.
The high antitorque screw device of this utility model in use, first the outer shoulder 6 of external screw thread contacts with internal thread external seal face 5, at this moment, upper button moment of torsion used is born by the outer circular bead surface of external screw thread and internal thread, external screw thread front end circular bead surface 4 does not also contact with internal thread inner face 3, and the scope in gap is 0-0.25mm; When torque wrench moment continues to increase, the outer circular bead surface 6 of external screw thread and internal thread external seal face 5 start interference, screw thread also starts interference, at this moment torque wrench moment is born by external thread section 8 and internal thread segment 9, along with the continuation of torque wrench moment increases, external screw thread front end circular bead surface 4 starts to contact with internal thread inner face 3, bears a part of moment of torsion, and at this moment screw connection has reached the torque wrench moment of design.
Claims (4)
1. a high antitorque screw connection, it comprises the male connection with the outer circular bead surface of external screw thread, external thread section and external screw thread front end circular bead surface, and there is the female adapter of internal thread inner face, internal thread segment and internal thread external seal face, it is characterized in that: described screw connection has four face contacts, when use, internal thread external seal face contacts with the outer circular bead surface of external screw thread, and internal thread inner face contacts with external screw thread front end circular bead surface.
2. the high antitorque screw connection of one according to claim 1, it is characterized in that: described internal thread inner face is more than or equal to the distance of internal thread external seal face that outside external screw thread, circular bead surface is to the distance of external screw thread front end circular bead surface, and its difference is 0-0.25mm.
3. the high antitorque screw connection of one according to claim 1, is characterized in that: the outer circular bead surface of described external screw thread is to the long 12.7-25.4 mm of external thread length of the distance of the external screw thread front end circular bead surface same outer diameter more listed than API standard.
4. the high antitorque screw connection of one according to claim 1, is characterized in that: the range of taper of external thread section be 1:8 to 1:16, the range of taper of internal thread segment is that 1:8 is to 1:16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844660.9U CN203729903U (en) | 2013-12-20 | 2013-12-20 | Extremely-high anti-torsional thread connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844660.9U CN203729903U (en) | 2013-12-20 | 2013-12-20 | Extremely-high anti-torsional thread connection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203729903U true CN203729903U (en) | 2014-07-23 |
Family
ID=51199983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320844660.9U Expired - Fee Related CN203729903U (en) | 2013-12-20 | 2013-12-20 | Extremely-high anti-torsional thread connection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203729903U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952391A (en) * | 2016-06-24 | 2016-09-21 | 江阴德玛斯特钻具有限公司 | Improved double-shouldered drill pipe joint |
| CN106437552A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-sealing drill pipe joint |
| CN106437551A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-torsion-resistance drill pipe connector with good sealing |
-
2013
- 2013-12-20 CN CN201320844660.9U patent/CN203729903U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952391A (en) * | 2016-06-24 | 2016-09-21 | 江阴德玛斯特钻具有限公司 | Improved double-shouldered drill pipe joint |
| CN106437552A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-sealing drill pipe joint |
| CN106437551A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-torsion-resistance drill pipe connector with good sealing |
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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: 20140723 Termination date: 20171220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |