CN201288903Y - Oil sleeve screwed connection head of negative bearing angle - Google Patents
Oil sleeve screwed connection head of negative bearing angle Download PDFInfo
- Publication number
- CN201288903Y CN201288903Y CNU2008201536919U CN200820153691U CN201288903Y CN 201288903 Y CN201288903 Y CN 201288903Y CN U2008201536919 U CNU2008201536919 U CN U2008201536919U CN 200820153691 U CN200820153691 U CN 200820153691U CN 201288903 Y CN201288903 Y CN 201288903Y
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Abstract
The utility model relates to a spiral coupling of an oil well tube, especially to a spiral connection coupling with a negative bearing face angle, applied to oil fields having requirements of high torque resistance and high air tightness. The coupling is formed by connecting a coupling of an inner screw thread with a negative bearing face angle at two ends respectively and two sleeve bodies with screw thread having the same negative bearing face angle. The outer screw thread has an outer screw thread tooth top, and outer screw thread guiding-in face, an outer screw thread tooth bottom and an outer screw thread bearing face, and the inner screw thread has an inner screw thread tooth top, and inner screw thread guiding-in face, an inner screw thread tooth bottom and an inner screw thread bearing face. The inner screw thread and the outer screw thread has the same tooth-shaped angle which is 10 degrees; the angle of the outer screw thread bearing face and the inner screw thread bearing face is a negative angle which is -2 degrees; the angle of the crescent-shaped guiding-in face is 12 degrees. The utility model solves technical problems of poor torque resistance and poor air tightness of nearly trapeziform screw threads in the prior art when oil is produced and provides a spiral connection coupling for oil sleeves with a negative bearing face angle.
Description
Technical field
The utility model relates to a kind of oil well pipe thread joint, the oil casing threaded jointing at particularly a kind of negative supporting plane angle is suitable for that high torque resistant is arranged, the field use of high gas sealing ability requirement.
Background technique
Tubing and casing is the essential and very big oil country tubular good of consumption in the exploitation of oil-gas field, and hundreds of thousands of tubing and casing are by being threaded togather the formation oil well pipe, and its quality directly has influence on the success or failure of petroleum drilling and mining operation and the working life of oil gas well.Oil casing generally will bear very high external and internal pressure and owing to the effect of the tension load that causes of deadweight, connecting thread is the weakest link in the whole oil casing, having in the tubing and casing failure accidents according to statistics all to occur in the threaded connection place more than 80%, is the factor of guaranteeing the most critical of oil casing quality so improve oil casing threaded quality of connection.The integral body that internal and external threads is formed is commonly referred to the oil well pipe thread joint again, the oil well pipe thread joint can be divided into two classes in general: a class is that API (AmericanPetroleum Institute) inipple promptly meets the inipple of API API standard, comprise short round thread joint, oval inipple, joints such as buttress thread joint, the advantage of this joint is a technology maturation, it is good to be easy to processing and to detect interchangeability, and cost of production is lower, but the API joint is owing to there are many defectives that are difficult to overcome in the reason of structural design itself, join strength as the round thread joint is lower, only be the 60-80% of body join strength, can not ensure the structural integrity of oil casing, the torque resistant poor-performing of buttress thread joint, sealability is unreliable, seal-air pressure generally is no more than 28MPa, can not ensure the sealing integrity of oil casing, the application of this screw thread is very limited.An other class right and wrong API inipple is also referred to as the special thread joint, the special thread joint of non-API standard is mostly on buttress thread joint basis, increased the high-quality inipple of torque resistant shoulder, metal to metal seal structure, but the main dependence on import of special thread joint of present domestic non-API standard, face as price height, field test difficulty, annex and supply problems such as untimely, be difficult to large-scale popularization, can't satisfy the needs of oil field the special thread joint; And increasing along with domestic deep-well, ultradeep well and high-pressure oil-gas well production quantity, demand for the special thread joint with high torque resistant, high gas sealing ability also increases day by day, so the needs exploitation is suitable for that high torque resistant is arranged, the oil casing threaded jointing of high gas sealing ability requirement.
Summary of the invention
The utility model has solved buttress thread torque resistant poor-performing in the above-mentioned Petroleum Production prior art, and the technical problem that sealability is lower provides the oil casing threaded jointing at a kind of negative supporting plane angle.
For achieving the above object, the utility model is achieved in that
The oil casing threaded jointing at a kind of negative supporting plane angle is characterized in that: it is had the internal thread at negative supporting plane angle by two ends box cupling and two externally threaded sleeve pipe bodys that have same negative supporting plane angle respectively connect to form; At the bottom of described outside thread has outside thread tooth top, outside thread approaching face, an outside thread tooth, the outside thread supporting plane, at the bottom of described internal thread has internal thread tooth top, internal thread approaching face, an internal thread tooth, the internal thread supporting plane; It is 10 ° that described internal thread has identical angle of thread with outside thread, and outside thread supporting plane and internal thread supporting plane angle are negative angles, and angle is-2 °, and crescent shape approaching face angle is 12 °.
Described negative carrying and the oil casing threaded jointing at angle is characterized in that: at the bottom of the internal thread tooth of described box cupling and the fillet between the internal thread supporting plane than the outside thread tooth of sleeve pipe at the bottom of and 0.05 times of the big fillet radius of fillet between the outside thread supporting plane.
The oil casing threaded jointing at described negative supporting plane angle, it is characterized in that: it is 15 ° internal torque boss shoulder that both sides, described box cupling center portion are provided with two angles, the sleeve pipe two ends each the angle that cooperates with internal torque shoulder in the box cupling is set is that 15 ° internal torque boss is takeed on.
The oil casing threaded jointing at described negative supporting plane angle, it is characterized in that: angle is set is 24 ° interior sealing cone between the internal thread of described box cupling and its internal torque boss shoulder, the angle that cooperates with sealing cone in the box cupling is set is 24 ° interior sealing cone between the outside thread of sleeve pipe and its internal torque boss shoulder, two interior sealing cone interference overlap lengths are greater than 0.15mm.
The oil casing threaded jointing at described negative supporting plane angle, it is characterized in that: the box cupling sealing transition section that the cylndrical surface is set between the internal thread of described box cupling and its interior sealing cone, be provided with the bobbin seal changeover portion of conical surface between the outside thread of sleeve pipe and its interior sealing cone, tapering is not more than 1:16, and sleeve end radicals by which characters are arranged in traditional Chinese dictionaries tooth angle degree is 45-65 °.
The oil casing threaded jointing at described negative supporting plane angle is characterized in that: the internal torque boss of described box cupling shoulder and in it fillet between sealing cone than the internal torque boss shoulder of sleeve pipe and 0.3 times of the little fillet radius of fillet between the sealing cone in it.
The oil casing threaded jointing at described negative supporting plane angle is characterized in that: the average transverse tooth thickness width of described internal and external screw thread is 1/2 of a pitch, and the transverse tooth thickness width of internal and external screw thread differs 0.03mm.
The oil casing threaded jointing at described negative supporting plane angle is characterized in that: the tooth depth of described internal and external screw thread is asymmetric, and the tooth depth of internal and external screw thread differs 0.05mm.
Compared with prior art, the beneficial effects of the utility model are: by adopting the connecting thread profile of tooth at negative supporting plane angle, eliminated the supporting plane angle fully and born the radial component that the tension load effect causes, avoided the screw thread slippage to lose efficacy, guaranteed the reliable connection of joint at the screw thread place for the timing joint; At the bottom of the internal thread tooth of box cupling and the fillet between the internal thread supporting plane do not adopt the API standard angle, but than at the bottom of the outside thread tooth of corresponding sleeve pipe with 0.05 times of the big fillet radius of fillet between the outside thread supporting plane, the stress that can effectively alleviate thread root is concentrated; And asymmetric internal and external threads tooth depth design can effectively improve the gas sealing ability of internal and external threads connection part; Box cupling and sleeve pipe are provided with the torque resistance that rational internal torque boss shoulder can improve oil casing threaded jointing greatly; Be provided with between box cupling and the sleeve pipe reasonably in form, sleeve end radicals by which characters are arranged in traditional Chinese dictionaries tooth angle degree and the interference overlapping degree of form, sealing transition section of sealing cone and different internal torque boss shoulder and fillet between the interior sealing cone can guarantee effective contact the between the interior sealing cone, this effective contact realizes the reliable sealing of metal to metal, makes the oil casing threaded jointing at the negative supporting plane angle of the utility model have high torque resistant and gas sealing ability.
Description of drawings
Fig. 1 is a cross-sectional view of the present utility model.
Fig. 2 is the be threaded enlarged diagram of part of negative supporting plane angle among Fig. 1.
Fig. 3 is the enlarged diagram of Fig. 1 convexity shoulder and sealing configuration part.
Among the figure:
1,9---sleeve pipe 2---box cupling
3---sleeve pipe outside thread 3a---outside thread tooth top
At the bottom of the 3b---outside thread approaching face 3c---outside thread tooth
3d---outside thread supporting plane 4---box cupling internal thread
4a---internal thread tooth top 4b---internal thread approaching face
4d---internal thread supporting plane at the bottom of the 4c---internal thread tooth
5---bobbin seal conical surface 6---box cupling sealing cone
7---sleeve pipe internal torque boss shoulder 8---box cupling internal torque boss shoulder
10---box cupling sealing transition section 11---bobbin seal changeover portion
12---sleeve end radicals by which characters are arranged in traditional Chinese dictionaries tooth angle degree
Embodiment
Oil casing threaded jointing to negative supporting plane of the present utility model angle is illustrated in conjunction with the accompanying drawings.
As Fig. 1, Fig. 2, shown in Figure 3, the oil casing threaded jointing at the negative supporting plane of this kind angle, it comprise two ends have the box cupling 2 of internal thread at a kind of negative supporting plane angle and two externally threaded sleeve pipe bodys 1,9 that have same negative supporting plane angle respectively totally three parts connect to form.
Sleeve pipe 1,9 screws at the two ends of box cupling 2 respectively and connects, sleeve pipe 1 is the on-the-spot hand-tight end in oil field, sleeve pipe 9 is tightly held for factory's machine, and it is that the angle of 10 °, its supporting plane 3d, 4d and axis normal direction is that negative angle is that the angle of-2 °, its thread form approaching face 3b, 4b and axis normal direction is 12 ° that their internal thread 4 and outside thread 3 have identical angle of thread; It is 62.5mm/m (1:16) that the outside thread 3 of sleeve pipe 1,9 has identical tapering with the internal thread 4 of box cupling 2; 3c, 4c and its tapering line parallel at the bottom of tooth top 3a, the 4a of internal and external threads and the tooth; Fillet at the bottom of the internal thread tooth of box cupling 2 between 4c and the internal thread supporting plane 4d than the outside thread tooth of sleeve pipe 1,9 at the bottom of 0.05 times of the big fillet radius of fillet of 3c and outside thread supporting plane 3d; The average transverse tooth thickness width of internal and external threads 3,4 be pitch 1/2, the transverse tooth thickness width of internal and external threads 3,4 differs 0.03mm; The tooth depth of internal and external threads 3,4 is that tooth depth asymmetric, internal and external threads 3,4 differs 0.05mm.
Both sides, box cupling 2 center portion respectively are provided with two internal torque boss shoulders 8, this internal torque boss shoulder 8 is 15 ° with the angle of axis normal direction, and each setting of sleeve pipe 1,9 two ends is 15 ° with 8 close-fitting internal torque boss shoulders 7, this internal torque boss shoulder 7 with the angle of axis normal direction.
Sealing cone 6, this interior sealing cone 6 are 24 ° with the angle of axial direction in being provided with between the internal thread 4 of box cupling 2 and its internal torque boss shoulder 8, the outside thread 3 of sleeve pipe 1,9 is takeed on the angle that the interior sealing cone 5, this interior sealing cone 5 and the axial direction that cooperate with 6 are set between 7 with its internal torque boss and is 24 °, sealing cone 6 and 5 effectively contacts and is interference fit, and the interference overlap length is greater than 0.15mm; The box cupling sealing transition section of cylndrical surface is set between the internal thread 4 of box cupling 2 and its interior sealing cone 6, at the outside thread 3 of sleeve pipe 1,9 and be provided with the bobbin seal changeover portion 11 of conical surface in it between the sealing cone 5, its tapering is not more than 1:16, and sleeve end radicals by which characters are arranged in traditional Chinese dictionaries tooth oblique angle 12 is 45 °-65 ° (with the axis normal direction); The internal torque boss shoulder 8 of box cupling 2 and the fillet between the interior sealing cone 6 are than the internal torque boss shoulder 7 of sleeve pipe 1,9 and 0.3 times of the little fillet radius of fillet between the interior sealing cone 5, guarantee closely cooperating between two internal torque boss shoulders 7,8, guarantee closely cooperating between two interior sealing cones 5,6, make jointing reach high torque resistant and high gas sealing ability.
Embodiment:
The internal thread of this thread connecting joint and outside thread all adopt negative supporting plane angle screw thread, angle of thread be 10 °, supporting plane angle for-2 °, approaching face angle be 12 °; It is 1:16 that internal and external threads has identical tapering; Pitch is every 25.4mm (1 inch) 5 teeth, and the transverse tooth thickness width of internal thread is that 2.54mm, externally threaded transverse tooth thickness width are 2.51mm; The tooth depth of internal thread is that 1.625mm, externally threaded tooth depth are 1.575mm; At the bottom of the outside thread tooth and the fillet between its supporting plane be the 0.2* fillet radius, at the bottom of the internal thread tooth and the fillet between its supporting plane be the 0.25* fillet radius; The internal torque shoulder of box cupling and the internal torque shoulder of sleeve pipe all are 15 ° with the axis normal direction.The interior sealing cone of box cupling and the interior sealing cone of sleeve pipe all are 24 ° with axial direction, and sealing cone interference overlap length is 0.30mm; The tapering of bobbin seal changeover portion is 1:16, first 60 ° at oblique angle of tooth (with the axis normal direction), its end; The internal torque boss shoulder of sleeve pipe and the fillet between the interior sealing cone are the 0.5* fillet radius, and the internal torque boss and the fillet between the interior sealing cone of box cupling are the 0.8* fillet radius.
Claims (8)
1, the oil casing threaded jointing at a kind of negative supporting plane angle is characterized in that: it is had the box cupling (2) of internal thread (4) at negative supporting plane angle and two and has the sleeve pipe bodys (1,9) of bearing the outside thread (3) at supporting plane angle equally respectively and connect to form by two ends; Described outside thread (3) has (3c), outside thread supporting plane (3d) at the bottom of outside thread tooth top (3a), outside thread approaching face (3b), the outside thread tooth, and described internal thread (4) has (4c), internal thread supporting plane (4d) at the bottom of internal thread tooth top (4a), internal thread approaching face (4b), the internal thread tooth; It is 10 ° that described internal thread (4) has identical angle of thread with outside thread (3), and outside thread supporting plane (3d) and internal thread supporting plane (4d) angle are negative angles, and angle is-2 °, and crescent shape approaching face (3b, 4b) angle is 12 °.
2, the oil casing threaded jointing at negative supporting plane according to claim 1 angle is characterized in that: the fillet at the bottom of the internal thread tooth of described box cupling (2) between (4c) and the internal thread supporting plane (4d) than the outside thread tooth of sleeve pipe (1,9) at the bottom of 0.05 times of the big fillet radius of fillet between (3c) and the outside thread supporting plane (3d).
3, the oil casing threaded jointing at negative supporting plane according to claim 1 angle, it is characterized in that: it is 15 ° internal torque boss shoulder (8) that described box cupling (2) both sides, center portion are provided with two angles, sleeve pipe (1,9) two ends each the angle that cooperates with internal torque shoulder (8) in the box cupling (2) is set is that 15 ° internal torque boss is takeed on (7).
4, the oil casing threaded jointing at negative supporting plane according to claim 3 angle, it is characterized in that: angle is set is 24 ° interior sealing cone (6) between the internal thread (4) of described box cupling (2) and its internal torque boss shoulder (8), the angle that cooperates with sealing cone (6) in the box cupling is set is 24 ° interior sealing cone (5) between the outside thread (3) of sleeve pipe (1,9) and its internal torque boss shoulder (7), two interior sealing cone (5,6) interference overlap lengths are greater than 0.15mm.
5, the oil casing threaded jointing at negative supporting plane according to claim 4 angle, it is characterized in that: the box cupling sealing transition section (10) that the cylndrical surface is set between the internal thread (4) of described box cupling (2) and its interior sealing cone (6), be provided with the bobbin seal changeover portion (11) of conical surface between the outside thread (3) of sleeve pipe (1,9) and its interior sealing cone (5), tapering is not more than 1:16, and sleeve end radicals by which characters are arranged in traditional Chinese dictionaries tooth angle degree is 45-65 °.
6, according to the oil casing threaded jointing at claim 4 or 5 described negative supporting plane angles, it is characterized in that: the fillet between the internal torque boss shoulder (8) of described box cupling (2) and its interior sealing cone (6) is than the internal torque boss shoulder (7) of sleeve pipe (1,9) and 0.3 times of the little fillet radius of fillet between its interior sealing cone (5).
7, the oil casing threaded jointing at negative supporting plane according to claim 1 angle, it is characterized in that: the average transverse tooth thickness width of described internal thread (4), outside thread (3) is 1/2 of a pitch, and the transverse tooth thickness width of internal thread (4), outside thread (3) differs 0.03mm.
8, the oil casing threaded jointing at negative supporting plane according to claim 1 angle, it is characterized in that: the tooth depth of described internal thread (4), outside thread (3) is asymmetric, the tooth depth of internal thread (4), outside thread (3) differs 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201536919U CN201288903Y (en) | 2008-09-28 | 2008-09-28 | Oil sleeve screwed connection head of negative bearing angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201536919U CN201288903Y (en) | 2008-09-28 | 2008-09-28 | Oil sleeve screwed connection head of negative bearing angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201288903Y true CN201288903Y (en) | 2009-08-12 |
Family
ID=40980586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201536919U Expired - Lifetime CN201288903Y (en) | 2008-09-28 | 2008-09-28 | Oil sleeve screwed connection head of negative bearing angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201288903Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881139A (en) * | 2010-07-07 | 2010-11-10 | 天津天钢石油专用管制造有限公司 | Thread connector of petroleum gas industrial tube |
| CN101696621B (en) * | 2009-11-04 | 2012-05-16 | 天津钢管集团股份有限公司 | Air-tight seal screw joint |
| CN102587844A (en) * | 2012-03-27 | 2012-07-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread pipe coupling |
| CN102606086A (en) * | 2012-03-27 | 2012-07-25 | 无锡西姆莱斯石油专用管制造有限公司 | Connecting joint with special knuckle threads for oil casing |
| CN102639911A (en) * | 2009-11-20 | 2012-08-15 | 瓦卢莱克曼内斯曼油气法国公司 | Threaded connection |
| CN102852468A (en) * | 2012-04-25 | 2013-01-02 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealing special circular thread oil sleeve connection connector |
| CN102852466A (en) * | 2012-04-25 | 2013-01-02 | 无锡西姆莱斯石油专用管制造有限公司 | Special buttress thread oil sleeve connecting joint |
| CN103180538A (en) * | 2010-09-03 | 2013-06-26 | 优质保护器公司 | Polymer film for the conditioning of oil extraction pipes |
| CN104197123A (en) * | 2014-07-18 | 2014-12-10 | 克拉玛依双信防腐技术有限公司 | Repeatedly-repaired grinding-reduction anticorrosion composite pipe and manufacturing method |
| CN108115230A (en) * | 2017-11-20 | 2018-06-05 | 天津钢管集团股份有限公司 | The optimum design method of buttress thread connector incomplete thread part |
| CN108301786A (en) * | 2018-04-11 | 2018-07-20 | 张祖林 | A kind of special thread buckle joint |
-
2008
- 2008-09-28 CN CNU2008201536919U patent/CN201288903Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696621B (en) * | 2009-11-04 | 2012-05-16 | 天津钢管集团股份有限公司 | Air-tight seal screw joint |
| CN102639911A (en) * | 2009-11-20 | 2012-08-15 | 瓦卢莱克曼内斯曼油气法国公司 | Threaded connection |
| US9273521B2 (en) | 2009-11-20 | 2016-03-01 | Vallourec Oil And Gas France | Threaded connection |
| CN101881139B (en) * | 2010-07-07 | 2015-07-08 | 天津天钢石油专用管制造有限公司 | Thread connector of petroleum gas industrial tube |
| CN101881139A (en) * | 2010-07-07 | 2010-11-10 | 天津天钢石油专用管制造有限公司 | Thread connector of petroleum gas industrial tube |
| CN103180538A (en) * | 2010-09-03 | 2013-06-26 | 优质保护器公司 | Polymer film for the conditioning of oil extraction pipes |
| CN103180538B (en) * | 2010-09-03 | 2016-07-20 | 优质保护器公司 | For regulating the polymeric film of oil extraction pipeline |
| CN102587844A (en) * | 2012-03-27 | 2012-07-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread pipe coupling |
| CN102587844B (en) * | 2012-03-27 | 2015-04-15 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread pipe coupling |
| CN102606086A (en) * | 2012-03-27 | 2012-07-25 | 无锡西姆莱斯石油专用管制造有限公司 | Connecting joint with special knuckle threads for oil casing |
| CN102852466B (en) * | 2012-04-25 | 2015-04-15 | 无锡西姆莱斯石油专用管制造有限公司 | Special buttress thread oil sleeve connecting joint |
| CN102852468B (en) * | 2012-04-25 | 2015-04-15 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealing special circular thread oil sleeve connection connector |
| CN102852466A (en) * | 2012-04-25 | 2013-01-02 | 无锡西姆莱斯石油专用管制造有限公司 | Special buttress thread oil sleeve connecting joint |
| CN102852468A (en) * | 2012-04-25 | 2013-01-02 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealing special circular thread oil sleeve connection connector |
| CN104197123A (en) * | 2014-07-18 | 2014-12-10 | 克拉玛依双信防腐技术有限公司 | Repeatedly-repaired grinding-reduction anticorrosion composite pipe and manufacturing method |
| CN108115230A (en) * | 2017-11-20 | 2018-06-05 | 天津钢管集团股份有限公司 | The optimum design method of buttress thread connector incomplete thread part |
| CN108301786A (en) * | 2018-04-11 | 2018-07-20 | 张祖林 | A kind of special thread buckle joint |
| CN108301786B (en) * | 2018-04-11 | 2024-04-19 | 张祖林 | Special thread-locking joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Oceanic rise oil drilling tools (Wuxi) Co., Ltd Assignor: Shanghai Hilong pipe Research Institute|Oriental Science and Technology (Beijing) Co., Ltd. Qianyuan Contract record no.: 2011320001228 Denomination of utility model: Oil sleeve screwed connection head of negative bearing angle Granted publication date: 20090812 License type: Exclusive License Record date: 20120113 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090812 |
|
| CX01 | Expiry of patent term |