CN202391353U - Non-collar connection thread for petroleum oil pipe and casing - Google Patents
Non-collar connection thread for petroleum oil pipe and casing Download PDFInfo
- Publication number
- CN202391353U CN202391353U CN2011205291700U CN201120529170U CN202391353U CN 202391353 U CN202391353 U CN 202391353U CN 2011205291700 U CN2011205291700 U CN 2011205291700U CN 201120529170 U CN201120529170 U CN 201120529170U CN 202391353 U CN202391353 U CN 202391353U
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- conical surface
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Abstract
The utility model discloses a non-collar connection thread for a petroleum oil pipe and a casing. The non-collar connection thread comprises an inner thread (1) and an outer thread (2) arranged at two ends of the oil pipe or the casing; the threads are shaped like buttress teeth, and the inner thread and the outer thread are in non-collar connection; the inner thread (1) and the outer thread (2) are both two-stage step threads; a bearing angle alpha of the threads ranges from 6 degrees to 9 degrees, and a buckling side angle beta of the threads ranges from 15 degrees to 25 degrees. According to the utility model, first-stage cone interference fit, two-stage cone interference fit and wedge fit are adopted for sealing, a connector has high connection strength and good sealing property, can be matched with the pipe body and the like in strength, and is applicable to connection of oil pipes or casings of a deep well, an ultradeep well, a high-pressure gas well, an oil well and a thermal production well; due to strong bending resistance, the non-collar connection thread is applicable to an inclined shaft, a large-displacement well and a horizontal well; screwing on is easy, so that the non-collar connection thread can be quickly screwed on and hardly cause a mistake, and is applicable to drilling operation under severe environment in desert and sea; due to good thread gluing resistance, the non-collar connection thread can be repeatedly screwed on and not damaged; the excessive torque resistance capability is good; and the corrosion resistance is good.
Description
Technical field
the utility model relates to a kind of petroleum oil and the effective no box cupling connecting thread of cover, belongs to petroleum drilling and mining tubing technical field.
Background technology
modern petroleum exploration and development; Oil gas well drilling operation is more and more to bigger well depth, more high pressure and temperature; The direction of harsher working condition develops; Along with the progress of oil drilling technology technology self, petroleum oil and sleeve pipe are threaded according to API (American Petroleum Institute (API)) standard manufacture, owing to reasons such as its sealing performance and bonding strength can not satisfy instructions for use.The API round thread belongs to tapering round thread tooth form has box cupling to connect, and has the comparison excellent sealing ability, and tensile strength arrives 60%～80% of body portion at the most, and ridge is that the easy thread gluing of interference fit damages.The API buttress thread belongs to the trapezoidal partially tooth form of tapering does not have the box cupling connection, and bonding strength is high, but sealing performance does not reach the high-pressure gas well requirement.
Summary of the invention
The purpose of
the utility model is, a kind of petroleum oil and the effective no box cupling connecting thread of cover are provided.With solution thread connection poor sealing performance under the condition of high temperature, high pressure, and the low problem of linking intensity.
The technical scheme of the utility model
a kind of petroleum oil and the effective no box cupling connecting thread of cover comprise the internal thread and the external screw thread that are located at oil pipe or sleeve pipe two ends; Screw thread form is that inclined to one side stepped tooth, internal thread do not have box cupling with external screw thread and be connected; Internal thread and external screw thread are the secondary stepped thread; Its screw thread carries angle α=6o～9o, goes into to detain side angle=15o～25o.
In
aforementioned petroleum oil and the effective no box cupling connecting thread of cover, said ridge carries angle α=7o～8o, goes into to detain side angle=18o～22o.
In
aforementioned petroleum oil and the effective no box cupling connecting thread of cover, said ridge carries angle α=7.5o, goes into to detain side angle=20o.
In
aforementioned petroleum oil and the effective no box cupling connecting thread of cover, said external screw thread front end is provided with the primary seal conical surface, the cone angle gamma=18o～22o of the external screw thread primary seal conical surface; The junction of external screw thread two rank screw threads is provided with shoulder, the wedge-type seal angle δ=70o～80o at external screw thread shoulder place; The external screw thread tail end is provided with the secondary seal conical surface, the cone angle ε=10o～14o of the external screw thread secondary seal conical surface.
In
aforementioned petroleum oil and the effective no box cupling connecting thread of cover, said external screw thread front end is provided with the primary seal conical surface, the cone angle gamma=20o of the external screw thread primary seal conical surface; The junction of external screw thread two rank screw threads is provided with shoulder, the wedge-type seal angle δ=75o at external screw thread shoulder place; The external screw thread tail end is provided with the secondary seal conical surface, the cone angle ε=12o of the external screw thread secondary seal conical surface.
In
aforementioned petroleum oil and the effective no box cupling connecting thread of cover, said internal thread front end is provided with the primary seal conical surface, and the cone angle of the internal thread primary seal conical surface is corresponding with the cone angle ε of the external screw thread secondary seal conical surface; The junction of internal thread two rank screw threads is provided with shoulder, and the wedge-type seal angle at internal thread shoulder place is corresponding with the wedge-type seal angle δ at external screw thread shoulder place; The internal thread tail end is provided with the secondary seal conical surface, and the cone angle of the internal thread secondary seal conical surface is corresponding with the cone angle gamma of the external screw thread primary seal conical surface.
compared with prior art, the utility model has adopted three grades of Seal Design, the joint bonding strength is high, can with body equal strength coupling, be applicable to being threaded of deep-well, ultradeep well; Good seal performance is applicable to high-pressure gas well, oil well and thermal production well; Bending resistance is strong, is applicable to inclined shaft, extended reach well, horizontal well; Last button is easy, detains on can be fast and is difficult for thread alternating, is applicable to the drillng operation under desert, the first-class adverse circumstances in ocean; Anti-stick button performance is good, can go up shackle repeatedly and does not damage screw thread; Resisted torque capability strong; Good corrosion resistance.The utility model mainly by external screw thread with internal thread form.External screw thread and internal thread all are to be formed by the two-stage stepped thread.Owing to be the two-stage thread connection, so sealing performance and linking intensity have all improved greatly.Solved thread connection poor sealing performance under the condition of high temperature, high pressure, and the low problem of linking intensity.It has remedied the low deficiency of API round thread bonding strength, and it is not enough also to have remedied API buttress thread sealing performance.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the form of thread sketch map;
Fig. 3 is the external screw thread sketch map;
Fig. 4 is the internal thread sketch map.
Being labeled as in
accompanying drawing: 1-internal thread, 2-external screw thread, the 3-external screw thread primary seal conical surface; 4-external screw thread shoulder, the 5-external screw thread secondary seal conical surface, the 6-internal thread secondary seal conical surface; 7-internal thread shoulder; The 8-internal thread primary seal conical surface, the 9-load flank, 10-goes into the buckle teeth side.
The specific embodiment
are further described the utility model below in conjunction with accompanying drawing and embodiment, but not as the foundation to the utility model restriction.
embodiment.
a kind of petroleum oil and the effective no box cupling connecting thread of cover, as shown in Figure 1.Comprise the internal thread 1 and external screw thread 2 that are located at oil pipe or sleeve pipe two ends; Screw thread form is that inclined to one side stepped tooth, internal thread 1 are connected with external screw thread 2 no box cuplings; Internal thread 1 is the secondary stepped thread with external screw thread 2; Screw thread carries angle α=6o～9o, is threaded into button side angle=15o～25o.It is better that said screw thread carries angle α=7o～8o, and it is better to be threaded into button side angle=18o～22o.It is best that said screw thread carries angle α=7.5o, and it is best to be threaded into button side angle=20o.Said external screw thread front end is provided with the primary seal conical surface, the cone angle gamma=18o～22o of the external screw thread primary seal conical surface 3; The junction of external screw thread two rank screw threads is provided with shoulder, the wedge-type seal angle δ=70o～80o at external screw thread shoulder 4 places; The external screw thread tail end is provided with the secondary seal conical surface, the cone angle ε=10o～14o of the external screw thread secondary seal conical surface 5.The external screw thread front end is provided with the primary seal conical surface, and the cone angle gamma of the external screw thread primary seal conical surface 3 is best=20o; The junction of external screw thread two rank screw threads is provided with shoulder, and the wedge-type seal angle δ=75o at external screw thread shoulder 4 places is best; The external screw thread tail end is provided with the secondary seal conical surface, and the cone angle ε=12o of the external screw thread secondary seal conical surface 5 is best.Said internal thread front end is provided with the primary seal conical surface, and the cone angle of the internal thread primary seal conical surface 8 is corresponding with the cone angle ε of the external screw thread secondary seal conical surface 5; The junction of internal thread two rank screw threads is provided with shoulder, and the wedge-type seal angle at internal thread shoulder 7 places is corresponding with the wedge-type seal angle δ at external screw thread shoulder 4 places; The internal thread tail end is provided with the secondary seal conical surface, and the cone angle of the internal thread secondary seal conical surface 6 is corresponding with the cone angle gamma of the external screw thread primary seal conical surface 3.
The operating principle of the utility model
when the utility model external screw thread 2 connects with internal thread 1, have three seals.First road is that the external screw thread primary seal conical surface 3 fits with the internal thread secondary seal conical surface 6, has adopted the interference fit of the conical surface/conical surface; Second road is that external screw thread shoulder 4 matches with internal thread shoulder 7, has adopted the wedge-like engagement of shoulder to shoulder; The 3rd road is that the external screw thread secondary seal conical surface 5 fits with the internal thread primary seal conical surface 8, has adopted the interference fit of the conical surface/conical surface.So because petroleum oil has these 3 grades sealings can in the deep-well of HTHP or ultradeep well, be substituted with the connection of sealing ring sealing with the effective no box cupling connecting thread of cover.Petroleum oil has adopted the buttress thread tooth form with the tooth form of the effective no box cupling connecting thread of cover, and is big much than the supporting capacity of other form of thread angle.
Claims (6)
1. petroleum oil and the effective no box cupling connecting thread of cover comprise the internal thread (1) and the external screw thread (2) that are located at oil pipe and sleeve pipe two ends; It is characterized in that: screw thread form is that inclined to one side stepped tooth, internal thread (1) are connected with the no box cupling of external screw thread (2); Internal thread (1) and external screw thread (2) are the secondary stepped thread; Screw thread carries angle α=6o～9o, is threaded into button side angle=15o～25o.
2. according to said petroleum oil of claim 1 and the effective no box cupling connecting thread of cover, it is characterized in that: said screw thread carries angle α=7o～8o, is threaded into button side angle=18o～22o.
3. according to said petroleum oil of claim 2 and the effective no box cupling connecting thread of cover, it is characterized in that: said screw thread carries angle α=7.5o, is threaded into button side angle=20o.
4. according to claim 1,2 or 3 said petroleum oils with overlap effective no box cupling connecting thread, it is characterized in that: said external screw thread front end is provided with the primary seal conical surface, the cone angle gamma=18o～22o of the external screw thread primary seal conical surface (3); The junction of external screw thread two rank screw threads is provided with shoulder, wedge-type seal angle δ=70o～80o that external screw thread shoulder (4) is located; The external screw thread tail end is provided with the secondary seal conical surface, the cone angle ε=10o～14o of the external screw thread secondary seal conical surface (5).
5. according to said petroleum oil of claim 4 and the effective no box cupling connecting thread of cover, it is characterized in that: said external screw thread front end is provided with the primary seal conical surface, the cone angle gamma=20o of the external screw thread primary seal conical surface (3); The junction of external screw thread two rank screw threads is provided with shoulder, shoulder wedge-type seal angle δ=75o that external screw thread shoulder (4) is located; The external screw thread tail end is provided with the secondary seal conical surface, the cone angle ε=12o of the external screw thread secondary seal conical surface (5).
6. according to claim 1,2 or 3 said petroleum oils with overlap effective no box cupling connecting thread; It is characterized in that: said internal thread front end is provided with the primary seal conical surface, and the cone angle of the internal thread primary seal conical surface (8) is corresponding with the cone angle ε of the external screw thread secondary seal conical surface (5); The junction of internal thread two rank screw threads is provided with shoulder, and the wedge-type seal angle that internal thread shoulder (7) is located is corresponding with the wedge-type seal angle δ that external screw thread shoulder (4) is located; The internal thread tail end is provided with the secondary seal conical surface, and the cone angle of the internal thread secondary seal conical surface (6) is corresponding with the cone angle gamma of the external screw thread primary seal conical surface (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205291700U CN202391353U (en) | 2011-12-16 | 2011-12-16 | Non-collar connection thread for petroleum oil pipe and casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205291700U CN202391353U (en) | 2011-12-16 | 2011-12-16 | Non-collar connection thread for petroleum oil pipe and casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202391353U true CN202391353U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205291700U Expired - Lifetime CN202391353U (en) | 2011-12-16 | 2011-12-16 | Non-collar connection thread for petroleum oil pipe and casing |
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| Country | Link |
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| CN (1) | CN202391353U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362450A (en) * | 2013-08-03 | 2013-10-23 | 无锡西姆莱斯石油专用管制造有限公司 | Non-coupling multi-sealing tooth-width-variable wedge type threaded oil well pipe structure |
| CN103643900A (en) * | 2013-11-18 | 2014-03-19 | 东营海润钢管集团有限公司 | Direct-connection variable-thread-width petroleum tubing threads |
| CN104074473A (en) * | 2014-07-22 | 2014-10-01 | 江苏和信石油机械有限公司 | Drill rod connecting device for drilling of ultra-deep oil gas well |
| CN104453731A (en) * | 2013-09-13 | 2015-03-25 | 中国石油天然气集团公司 | Quick connector and application method |
| CN104481422A (en) * | 2014-11-12 | 2015-04-01 | 中国石油天然气集团公司 | Aluminum alloy drill rod pipe body and steel joint connecting structure |
| CN110273655A (en) * | 2019-07-26 | 2019-09-24 | 西南石油大学 | A kind of novel direct-connected retaining ring pipe screw thread structure |
| CN110388185A (en) * | 2019-03-25 | 2019-10-29 | 上海优强石油科技有限公司 | The twin-stage gas-tight thread structure of downhole tool |
| CN111299978A (en) * | 2020-03-20 | 2020-06-19 | 贵州合纵达钢结构有限责任公司 | Preparation method of drilling follow-up casing |
| CN112709744A (en) * | 2021-01-13 | 2021-04-27 | 北京航天试验技术研究所 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
| CN114458180A (en) * | 2020-11-10 | 2022-05-10 | 中国石油天然气股份有限公司 | Sleeve connecting device |
-
2011
- 2011-12-16 CN CN2011205291700U patent/CN202391353U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362450A (en) * | 2013-08-03 | 2013-10-23 | 无锡西姆莱斯石油专用管制造有限公司 | Non-coupling multi-sealing tooth-width-variable wedge type threaded oil well pipe structure |
| CN103362450B (en) * | 2013-08-03 | 2015-06-17 | 无锡西姆莱斯石油专用管制造有限公司 | Non-coupling multi-sealing tooth-width-variable wedge type threaded oil well pipe structure |
| CN104453731A (en) * | 2013-09-13 | 2015-03-25 | 中国石油天然气集团公司 | Quick connector and application method |
| CN103643900A (en) * | 2013-11-18 | 2014-03-19 | 东营海润钢管集团有限公司 | Direct-connection variable-thread-width petroleum tubing threads |
| CN104074473A (en) * | 2014-07-22 | 2014-10-01 | 江苏和信石油机械有限公司 | Drill rod connecting device for drilling of ultra-deep oil gas well |
| CN104074473B (en) * | 2014-07-22 | 2015-05-13 | 江苏和信石油机械有限公司 | Drill rod connecting device for drilling of ultra-deep oil gas well |
| CN104481422A (en) * | 2014-11-12 | 2015-04-01 | 中国石油天然气集团公司 | Aluminum alloy drill rod pipe body and steel joint connecting structure |
| RU2618716C1 (en) * | 2014-11-12 | 2017-05-11 | Чайна Нэшенел Петролиум Корпорейшен | Connecting structure between pipe body and steel lock of aluminium alloy drilling pipe |
| US10196863B2 (en) | 2014-11-12 | 2019-02-05 | China National Petroleum Corporation | Connection structure between pipe body and steel joint of aluminum alloy drill pipe |
| CN110388185A (en) * | 2019-03-25 | 2019-10-29 | 上海优强石油科技有限公司 | The twin-stage gas-tight thread structure of downhole tool |
| CN110273655A (en) * | 2019-07-26 | 2019-09-24 | 西南石油大学 | A kind of novel direct-connected retaining ring pipe screw thread structure |
| CN111299978A (en) * | 2020-03-20 | 2020-06-19 | 贵州合纵达钢结构有限责任公司 | Preparation method of drilling follow-up casing |
| CN114458180A (en) * | 2020-11-10 | 2022-05-10 | 中国石油天然气股份有限公司 | Sleeve connecting device |
| CN112709744A (en) * | 2021-01-13 | 2021-04-27 | 北京航天试验技术研究所 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
| CN112709744B (en) * | 2021-01-13 | 2024-06-11 | 北京航天试验技术研究所 | Sealing structure of threaded hole under low-temperature and high-pressure liquefied gas environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |
|
| CX01 | Expiry of patent term |