CN202578551U - Oil well pipe screwed joint - Google Patents
Oil well pipe screwed joint Download PDFInfo
- Publication number
- CN202578551U CN202578551U CN 201220060255 CN201220060255U CN202578551U CN 202578551 U CN202578551 U CN 202578551U CN 201220060255 CN201220060255 CN 201220060255 CN 201220060255 U CN201220060255 U CN 201220060255U CN 202578551 U CN202578551 U CN 202578551U
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- China
- Prior art keywords
- thread
- thread piece
- oil well
- well pipe
- piece
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- 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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- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a pipe body screwed joint, and provides an oil well pipe screwed joint suitable for oil pipes and casings. The oil well pipe screwed joint comprises an outer thread piece and an inner thread piece. The outer thread piece and the inner thread piece are respectively provided with connecting threads, a metal sealing structure and a torque circular bead. The connecting threads are buttress threads. Each metal sealing structure is a metal primary seal formed by a spherical surface sealing face on the outer thread piece and a spherical surface sealing face on the inner thread piece. The oil well pipe screwed joint is simple in structure, convenient to manufacture, and effective in sealing; and oil-gas well drilling work under various bad conditions can be achieved.
Description
Technical field
The utility model relates to the body nipple, a kind of specifically oil well pipe thread joint that is applicable to oil pipe, sleeve pipe.
Background technology
Go into the well and the well cementation process in, casing string bears outer power, internal pressure and stretching, compression, the bending load of squeezing.In long-term oil-gas mining process, except that bearing the stratum, squeeze outside the power, also possibly stand long-term high pressure water injection, gas production, repeatedly the interior pressure of fracture acidizing.Tubing string also bears axial La-La fluctuating load except that the load similar with above-mentioned casing string.In addition, the thermal stress of environment temperature (downhole temperature, heavy crude heat extraction etc.) is also very important.Under above-mentioned combined load, general screw connection structure is difficult to ensure the connection integrality and the sealing integrity of oil, casing string.The special thread joint that is applied to domestic oil well pipe at present is mostly from external import, and its cost is higher.
Summary of the invention
The purpose of the utility model is exactly in order to overcome the weak point of above-mentioned prior art, and a kind of oil well pipe thread joint is provided, and it is simple in structure, and is easily manufactured, and effectively the oil gas well drilling work under the various mal-conditions is satisfied in sealing.
The purpose of the utility model realizes through following technical measures: a kind of oil well pipe thread joint, comprise external thread piece and inner thread piece, and be respectively equipped with connecting thread, shape metallic leak-proof structure and torque shoulder on said external thread piece and the inner thread piece; Said connecting thread is a buttress thread, and said shape metallic leak-proof structure forms the master metal sealing by ball face sealing face on the external thread piece and the cooperation of the ball face sealing face on the inner thread piece.
In technique scheme, said connecting thread is a buttress thread, and the angle β that accepts of buttress thread is 3 °, and guide angle α is 10 °.
In technique scheme, said torque shoulder is reverse torque shoulder.
In technique scheme, said external thread piece inwall is concordant with the inner thread piece inwall.
The utility model oil well pipe thread joint, it is simple in structure, and is easily manufactured, has the following advantages:
1. screw thread adopts follow-on buttress thread form, can with the body equal strength.
2. ball face sealing face on the external thread piece and the ball face sealing face on the inner thread piece cooperate the sealing of formation master metal, and the auxiliary seal of torque shoulder, make joint have multi-sealing structure, and sealing reliability is high, and the interior pressure drag suitable with body can be provided.
3. adopted shoulder in the reverse moment of torsion, make joint incompressible, counter-bending, resisted torque capability strong, under bending and Action of Combined Loads, still can keep the surface pressing on the circular bead surface simultaneously.
4. the external thread piece inwall is concordant with the inner thread piece inwall, can effectively reduce gas or the liquid turbulent phenomenon in pipeline, makes energy loss minimum.
5. its dependable performance, each item performance indications are suitable with external NEW VAM type nipple, and can exchange with the said goods.
Description of drawings
Fig. 1 is the structural representation of the utility model oil well pipe thread joint.
Fig. 2 is the A place enlarged drawing among Fig. 1.
Fig. 3 is the B place enlarged drawing among Fig. 1.
Wherein: 1. inner thread piece, 2. external thread piece, 3. the ball face sealing face on the inner thread piece, 4. the ball face sealing face on the external thread piece, 5. torque shoulder, 6. connecting thread.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
Like Fig. 1,2, shown in 3, present embodiment provides a kind of oil well pipe thread joint, comprises external thread piece 2 and inner thread piece 1, is respectively equipped with connecting thread 6, shape metallic leak-proof structure and torque shoulder 5 on said external thread piece 2 and the inner thread piece 1; Said connecting thread 6 is a buttress thread, and said shape metallic leak-proof structure forms the master metal sealing by 3 cooperations of the ball face sealing face on ball face sealing face on the external thread piece 4 and the inner thread piece.
In the above-described embodiments, said connecting thread 6 is a buttress thread, and the angle β that accepts of buttress thread is 3 °, and guide angle α is 10 °.
In the above-described embodiments, said torque shoulder 5 is reverse torque shoulder, and auxiliary seal is carried out in butt joint, makes joint have multi-sealing structure, and sealing reliability is higher.
In the above-described embodiments, said external thread piece 2 inwalls are concordant with inner thread piece 1 inwall, can effectively reduce gas or the liquid turbulent phenomenon in pipeline, make energy loss minimum.
Detain easy, anti-thread gluing on the oil well pipe thread joint that the utility model provides, be difficult for thread alternating, be applicable to the middle and high well of calming the anger, high pressure pressure break oil pipe, high pressure oil wells, deep-well, ultradeep well, thermal production well etc.
Claims (4)
1. an oil well pipe thread joint comprises external thread piece and inner thread piece, it is characterized in that: be respectively equipped with connecting thread, shape metallic leak-proof structure and torque shoulder on said external thread piece and the inner thread piece; Said connecting thread is a buttress thread, and said shape metallic leak-proof structure forms the master metal sealing by ball face sealing face on the external thread piece and the cooperation of the ball face sealing face on the inner thread piece.
2. oil well pipe thread joint according to claim 1 is characterized in that: said connecting thread is a buttress thread, and the angle β that accepts of buttress thread is 3 °, and guide angle α is 10 °.
3. oil well pipe thread joint according to claim 1 is characterized in that: said torque shoulder is reverse torque shoulder.
4. oil well pipe thread joint according to claim 1 is characterized in that: said external thread piece inwall is concordant with the inner thread piece inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220060255 CN202578551U (en) | 2012-02-23 | 2012-02-23 | Oil well pipe screwed joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220060255 CN202578551U (en) | 2012-02-23 | 2012-02-23 | Oil well pipe screwed joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578551U true CN202578551U (en) | 2012-12-05 |
Family
ID=47247972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220060255 Expired - Fee Related CN202578551U (en) | 2012-02-23 | 2012-02-23 | Oil well pipe screwed joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2012
- 2012-02-23 CN CN 201220060255 patent/CN202578551U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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: 20121205 Termination date: 20200223 |