CN203476236U - Oil drill pipe joint variable in pitch and thread - Google Patents
Oil drill pipe joint variable in pitch and thread Download PDFInfo
- Publication number
- CN203476236U CN203476236U CN201320545284.3U CN201320545284U CN203476236U CN 203476236 U CN203476236 U CN 203476236U CN 201320545284 U CN201320545284 U CN 201320545284U CN 203476236 U CN203476236 U CN 203476236U
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- thread
- pitch
- joint
- screw
- drill pipe
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- Expired - Fee Related
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Abstract
The utility model relates to the field of oil drill pipes and discloses an oil drill pipe joint variable in pitch and thread. The oil drill pipe joint comprises a male joint and a female joint, and a thread of the female joint is of a uniform-pitch-thread structure, a thread of the male joint is formed by part of uniform-pitch-thread structure and part of variable-pitch-thread structure, the part of the uniform-pitch-thread is unchanged in pitch from the top to the middle of the thread, and the part of the variable-pitch-thread structure gradually reduces in pitch from the middle to the root of the thread. The oil drill pipe joint is simple in structure, service life is prolonged, cost is reduced, and working efficiency of oil drilling is improved.
Description
Technical field
The utility model relates to oil drill rocker field, specifically a kind of joint of petroleum drill rod of variable pitch screw.
Background technology
The drilling rod of using for oil drilling forms according to the manufacture of API standard production, and the structure that its drilling rod is general is a fillet of tool joint pins of each butt welding (hereinafter to be referred as male joint) and a tool joint box (hereinafter to be referred as female joint) at drill pipe body two ends.Male joint and female joint are together with being screwed in by self helicitic texture.
The male joint of existing oil drill rocker and the screw thread of female joint are equal pitch thread, i.e. the pitch of the thread pitch of male joint and female joint from top to root is consistent.In actual use, the screw thread of uniform pitch is when screwing, and stress mainly concentrates on the root of screw thread, near shoulder place, and very limited away from the load that screws threads carry of shoulder.This equal pitch thread structure easily causes the damage of screw thread, thereby affects the use of joint of petroleum drill rod, even causes oil drilling work to carry out, and will cause very large loss.
Summary of the invention
The purpose of this utility model is to provide a kind of joint of petroleum drill rod of variable pitch screw, can solve the problem in background technology, and the stress equilibrium on screw thread is distributed, and extends the life-span of joint of petroleum drill rod.
In order to solve the problems of the technologies described above, the technical scheme adopting is: a kind of joint of petroleum drill rod of variable pitch screw, comprise male joint and female joint, the screw thread of female joint is equal pitch thread structure, it is characterized in that, the screw thread of male joint is comprised of part equal pitch thread structure and part variable pitch screw structure, and part equal pitch thread structure is that the pitch from threaded middle to root is constant, and part variable pitch screw structure is that the pitch from threaded middle to top diminishes gradually.
The joint of petroleum drill rod designing by the utility model, in actual use, in male joint and female joint, button screws the stress equilibrium distribution of rear thread, improved the torsional property of joint of petroleum drill rod, extended application life, reduced cost, and still met API standard according to the product size of the utility model design, replaceable standard component is used.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structure enlarged diagram of Fig. 1 thread root;
Fig. 3 is the structure enlarged diagram of Fig. 1 threaded top.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is further described.
As shown in Figure 1, for structural representation of the present utility model, a kind of joint of petroleum drill rod of variable pitch screw, specifically comprise male joint 1 and female joint 2, the screw thread of female joint 2 is equal pitch thread structures 3, and the screw thread of male joint 1 is comprised of part equal pitch thread structure 4 and part variable pitch screw structure 5.As shown in Figure 2, be the structure enlarged diagram of thread root of the present utility model, the thread pitch from the middle part of screw thread to root does not become part equal pitch thread structure 4.As described in Figure 3, be the structure enlarged diagram of threaded top of the present utility model, the thread pitch from the middle part of screw thread to top diminishes gradually as part variable pitch screw structure 5.
The specific embodiment: male joint 1 of the present utility model and female joint 2 are welded in respectively to the two ends of oil drill rocker body, partial isometry helicitic texture 4 and part variable pitch screw structure 5 by male joint 1 screw with the equal pitch thread structure 3 of female joint 2.
The utility model, by the thread pitch of male joint 1 is improved to design, in actual use, makes the stress distribution on screw thread even, has extended the life-span of joint of petroleum drill rod, thereby has reduced cost, and improved the operating efficiency of oil drilling.
Claims (1)
1. the joint of petroleum drill rod of a variable pitch screw, comprise male joint (1) and female joint (2), the screw thread of female joint (2) is equal pitch thread structure (3), it is characterized in that: the screw thread of male joint (1) is comprised of part equal pitch thread structure (4) and part variable pitch screw structure (5), part equal pitch thread structure (4) is that the pitch from threaded middle to root is constant, and part variable pitch screw structure (5) is that the pitch from threaded middle to top diminishes gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545284.3U CN203476236U (en) | 2013-09-04 | 2013-09-04 | Oil drill pipe joint variable in pitch and thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545284.3U CN203476236U (en) | 2013-09-04 | 2013-09-04 | Oil drill pipe joint variable in pitch and thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476236U true CN203476236U (en) | 2014-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320545284.3U Expired - Fee Related CN203476236U (en) | 2013-09-04 | 2013-09-04 | Oil drill pipe joint variable in pitch and thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203476236U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359859A (en) * | 2018-01-19 | 2019-10-22 | 西南石油大学 | A kind of quickly upper button varying pitch ultrahigh anti-torsion tool joint |
-
2013
- 2013-09-04 CN CN201320545284.3U patent/CN203476236U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359859A (en) * | 2018-01-19 | 2019-10-22 | 西南石油大学 | A kind of quickly upper button varying pitch ultrahigh anti-torsion tool joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20140312 Termination date: 20170904 |