CN204402382U - A kind of oil pipe or sleeve pipe connecting thread - Google Patents
A kind of oil pipe or sleeve pipe connecting thread Download PDFInfo
- Publication number
- CN204402382U CN204402382U CN201520004174.5U CN201520004174U CN204402382U CN 204402382 U CN204402382 U CN 204402382U CN 201520004174 U CN201520004174 U CN 201520004174U CN 204402382 U CN204402382 U CN 204402382U
- Authority
- CN
- China
- Prior art keywords
- thread
- conical surface
- cylinder
- sleeve pipe
- oil pipe
- 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
Be a kind of oil pipe or sleeve pipe connecting thread disclosed in the utility model, there is high gas sealing ability and bonding strength.This connecting thread comprises external screw thread and internal thread, is all buttress threads, is also provided with cylinder one, the conical surface one and torque resistant shoulder one in externally threaded front portion; Cylinder two, the conical surface two and torque resistant shoulder two is also provided with at the rear portion of internal thread.The conical surface seal that the cylinder sealing that the utility model adopts metal interference to coordinate, linear contact lay coordinate and the auxiliary seal that torque resistant shoulder coordinates, the joint of oil pipe or sleeve pipe is made to have multi-sealing structure, by the juxtaposition metamorphose sealing mechanism between metal and metal, realize the sealing characteristics with pressure in anti-height.Because screw thread adopts inclined ladder type form, more common API round thread is thick, is easy to make-up and upper button, and bonding strength is close or reach body intensity.
Description
Technical field
The utility model relates to the connecting thread of industrial gas oil oil pipe and sleeve pipe, and particularly a kind of oil pipe or sleeve pipe connecting thread, have high gas sealing ability and bonding strength.
Background technology
Along with In Oil Field Exploration And Development deeply and expand to the periphery, Oil/gas Well is to the future development of larger well depth, more high pressure and temperature, harsher working condition, also higher to the requirement of oil, sleeve pipe.Traditional API round thread and inclined acme thread joint cannot meet the instructions for use in HTHP and deep-well Oil testing field.Although API round thread has more excellent sealing performance, testing pressure for hydrostatic test can reach 69MPa, but its be threaded part bonding strength be only equivalent to 60 ~ 80% of body portion, although and API buttress thread threaded portion bonding strength is higher, sealing performance is undesirable.So, for HTHP and ultradeep well well depth, temperature is high, pressure is large feature, bonding strength and the more superior special thread of sealing performance must being developed, for processing the Oil testing process pipe string of HTHP and ultradeep well, meeting the job requirements of Oil testing.
Summary of the invention
The purpose of this utility model is to provide a kind of oil pipe or sleeve pipe connecting thread, solves existing API round thread and the structural deficiency of inclined acme thread, makes its good seal performance, bonding strength higher and is easy to processing.
The utility model is achieved in that a kind of oil pipe or sleeve pipe connecting thread comprise external screw thread and internal thread, is all buttress threads, is also provided with cylinder one, the conical surface one and torque resistant shoulder one in externally threaded front portion; Cylinder two, the conical surface two and torque resistant shoulder two is also provided with at the rear portion of internal thread.
The utility model compared with prior art, has the following advantages:
1, gas sealing ability is good, this connecting thread adopt metal interference coordinate cylinder sealing, linear contact lay coordinate conical surface seal and torque resistant shoulder coordinate auxiliary seal, the joint of oil pipe or sleeve pipe is made to have multi-sealing structure, by the juxtaposition metamorphose sealing mechanism between metal and metal, realize the sealing characteristics with pressure in anti-height;
2, the connecting thread intensity of oil pipe or casing joint place is high, and because screw thread adopts inclined ladder type form, more common API round thread is thick, is easy to make-up and upper button, and bonding strength is close or reach body intensity;
3, the structure of torque resistant shoulder makes screw thread have higher anti-stick button ability and anti-ly cross torque capability, can repeatedly go up, shackle, not easy damaged screw thread.
4, the utility model can meet the job requirements of high temperature, high pressure and ultradeep well Oil testing process pipe string.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model internal thread linkage section.
Fig. 2 is the structural representation of the utility model external screw thread linkage section.
Detailed description of the invention
Describe in detail the utility model below in conjunction with accompanying drawing, see Fig. 1 and Fig. 2, a kind of oil pipe or sleeve pipe connecting thread comprise external screw thread 1 and internal thread 2, are all buttress threads, are also provided with cylinder 1, the conical surface 1 and torque resistant shoulder 1 in the front portion of external screw thread 1; Cylinder 24, the conical surface 26 and torque resistant shoulder 28 is also provided with at the rear portion of internal thread 2.Cylinder 1 and cylinder 24 are interference fit, and the magnitude of interference is 0.1mm-0.2mm.The tapering of the conical surface 1 is 1:7, and the tapering of the conical surface 26 is 1:5, the conical surface 1 with the conical surface 26 for linear contact lay coordinates.Antitorque is 12 ° ~ 18 ° apart from the end face of shoulder 1 and the angle α of vertical direction, and antitorque is also 12 ° ~ 18 ° apart from the end face of shoulder 28 and the angle α of vertical direction, and the end face of both shoulders is identical with the angle of the angle α of vertical direction.External screw thread 1 and internal thread 2 are the buttress thread of 8 buttons/inch, and its tapering is 1:16, bearing surface angle is 3 °, spigot surface angle is 10 °, and this structure can bear larger axial load.
Claims (5)
1. oil pipe or a sleeve pipe connecting thread, comprise external screw thread and internal thread, is all buttress threads, it is characterized in that, is also provided with cylinder one, the conical surface one and torque resistant shoulder one in externally threaded front portion; Cylinder two, the conical surface two and torque resistant shoulder two is also provided with at the rear portion of internal thread.
2. a kind of oil pipe according to claim 1 or sleeve pipe connecting thread, is characterized in that, described cylinder one is interference fit with cylinder two, and the magnitude of interference is 0.1mm ~ 0.2mm.
3. a kind of oil pipe according to claim 1 or sleeve pipe connecting thread, is characterized in that, the tapering of the described conical surface one is 1:7, and the tapering of the conical surface two is 1:5, the conical surface one with the conical surface two for linear contact lay coordinates.
4. a kind of oil pipe according to claim 1 or sleeve pipe connecting thread, it is characterized in that, the described antitorque distance end face of shoulder one and the angle α of vertical direction are 12 ° ~ 18 °, antitorque is also 12 ° ~ 18 ° apart from the end face of shoulder two and the angle α of vertical direction, and the end face of both shoulders is identical with the angle of the angle α of vertical direction.
5. a kind of oil pipe according to claim 1 or sleeve pipe connecting thread, is characterized in that, described external screw thread and internal thread are the buttress thread of 8 buttons/inch, and its tapering is 1:16, bearing surface angle is 3 °, spigot surface angle is 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520004174.5U CN204402382U (en) | 2015-01-06 | 2015-01-06 | A kind of oil pipe or sleeve pipe connecting thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520004174.5U CN204402382U (en) | 2015-01-06 | 2015-01-06 | A kind of oil pipe or sleeve pipe connecting thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204402382U true CN204402382U (en) | 2015-06-17 |
Family
ID=53426255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520004174.5U Expired - Fee Related CN204402382U (en) | 2015-01-06 | 2015-01-06 | A kind of oil pipe or sleeve pipe connecting thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204402382U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431506A (en) * | 2021-06-25 | 2021-09-24 | 中石化石油机械股份有限公司研究院 | Thread structure and screwed joint system |
-
2015
- 2015-01-06 CN CN201520004174.5U patent/CN204402382U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431506A (en) * | 2021-06-25 | 2021-09-24 | 中石化石油机械股份有限公司研究院 | Thread structure and screwed joint system |
| CN113431506B (en) * | 2021-06-25 | 2023-09-15 | 中石化石油机械股份有限公司研究院 | Thread structure and threaded joint system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20220106 |