CN204082029U - A kind of oil bushing threaded connector of high torque resistant high leakproofness - Google Patents
A kind of oil bushing threaded connector of high torque resistant high leakproofness Download PDFInfo
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- CN204082029U CN204082029U CN201420355662.6U CN201420355662U CN204082029U CN 204082029 U CN204082029 U CN 204082029U CN 201420355662 U CN201420355662 U CN 201420355662U CN 204082029 U CN204082029 U CN 204082029U
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- torque resistant
- box cupling
- shoulder
- threaded connector
- cone seal
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Abstract
The oil bushing threaded connector of high torque resistant high leakproofness disclosed in the utility model, comprise box cupling and two bodys, the two ends of box cupling are threaded with two bodys, the inner surface of box cupling is divided into two symmetrical cross-talk inner surfaces by the mid-plane of box cupling, sub-inner surface comprises the first negative angle torque resistant shoulder, the first cone seal section and the internal thread segment that are set gradually to end by the middle part of box cupling, and box cupling two ends are right angle end face; The external surface of body end comprises the second negative angle torque resistant shoulder, the second cone seal section, external thread section and the right angle torque resistant shoulder that are set gradually to middle part by body end; Internal thread segment and external thread section are the trapezoidal thread of working in coordination; When two bodys are connected respectively to the two ends of box cupling, first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder form interference fit, first cone seal section and the second cone seal section form interference fit, and the right angle end face of box cupling and the right angle torque resistant shoulder of body form interference and dock and coordinate.
Description
Technical field
The utility model relates to the water-tight equipment in petroleum and natural gas industry, more particularly, relates to a kind of oil bushing threaded connector of high torque resistant high leakproofness.
Background technology
Tubing and casing is the necessary oil country tubular good of recover petroleum and natural gas, is generally threaded connection the tubing string being formed and reach hundreds of rice to thousands of meters by tens to hundreds of root tubing and casing, assume responsibility for the main task of exploitation oil gas.
The screw thread of current tubing and casing mainly uses API buttress thread, and API buttress thread is the thread forms according to API standard production and use, and its processing detects relatively simple and cost is lower.But due to the reason of its structure design aspect, there is many defects being difficult to overcome, as low in: sealing performance, on anchor that position is inaccurate, joint stress level height easily there is thread gluing and upper button after box cupling inside there is annular clearance etc., thus cause fluid turbulence, cause energy loss, torque resistant ability low, the problem such as screw thread is fragile when torque overload.Therefore the use of API buttress thread is greatly limited in recent years, force people to develop and use the special thread oil pipe and sleeve pipe that have compared with high leakproofness, but cost of production also significantly increases thereupon.
Raising along with Songliao basin and the continuous growth to petroleum resources demand, the exploitation of deep-well, ultradeep well, shale gas has become the main object of China's oil-gas exploration and development.Tubing and casing Service Environment is more severe, the requirement that new designs of threaded joints proposes " high sealability, high strength, high moment of torsion ", and the connected mode of common API buttress thread has been difficult to meet exploitation requirement.
Therefore, the oil bushing threaded connector that a kind of high bonding strength, high sealing performance, high torque resistant, control easy to use are provided is needed.
Utility model content
For deficiency of the prior art, one or more during the purpose of this utility model is to solve the problems of the technologies described above.
The purpose of this utility model be to solve existing API be threaded the energy loss that intensity is low, joint stress level is high, internal turbulence causes large, on anchor that position is inaccurate, anti-crosses low etc. the defect of torque capability and deficiency, the oil bushing threaded connector of a kind of high bonding strength, high sealing performance, high torque resistant, control easy to use is provided.
To achieve these goals, the utility model provides a kind of oil bushing threaded connector of high torque resistant high leakproofness, described nipple comprises box cupling and two bodys, the two ends of described box cupling are threaded with described two bodys respectively, the inner surface of described box cupling is divided into two symmetrical cross-talk inner surfaces by the mid-plane of box cupling, described sub-inner surface comprises the first negative angle torque resistant shoulder, the first cone seal section and the internal thread segment that are set gradually to end by the middle part of box cupling, and the two ends of described box cupling are right angle end face; The external surface of the end of described body comprises the second negative angle torque resistant shoulder, the second cone seal section, external thread section and the right angle torque resistant shoulder that are set gradually to middle part by the end of body; Wherein, described internal thread segment and external thread section are the trapezoidal thread of working in coordination; When described two bodys are connected respectively to the two ends of described box cupling, described first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder form interference fit, described first cone seal section and the second cone seal section form interference fit, and the right angle end face of described box cupling and the right angle torque resistant shoulder of body form interference and dock and coordinate.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, the sub-inner surface of described box cupling also comprises the bore hole face between internal thread segment and right angle end face, and the external surface of the end of described body also comprises the escape between external thread section and right angle torque resistant shoulder.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, described trapezoidal thread for entirely to push up screw thread, and the spigot surface angle of described trapezoidal thread be 20 °, bearing surface angle is 3 °, flank tapering is 1:16, thread interference amount is 0.15 ~ 0.2mm, flight pitch is 3.175mm, 4.234mm or 5.08mm.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, the angle of described first cone seal section and the second cone seal section is 3 ~ 5 °, the length of described first cone seal section and the second cone seal section is 5 ~ 10mm, and the magnitude of interference of the interference fit that described first cone seal section and the second cone seal section are formed is 0.2 ~ 0.4mm.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, the angle of described first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder is-10 ~-12 °, and the magnitude of interference of the interference fit that the first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder are formed is 0.15 ~ 0.25mm.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, it is 0.1 ~ 0.15mm that the magnitude of interference coordinated is docked in the interference that the right angle end face of described box cupling and the right angle torque resistant shoulder of body are formed.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, described second negative angle torque resistant shoulder adopts transition circle cambered surface to be connected with between the second cone seal section.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, the junction of the inner surface of described body and the inner surface of box cupling is formed and is connected smoothly.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, the end of described body has the thick section through thickening process, the external diameter 5 ~ 6mm larger than the external diameter of the non-thick section of body of described thick section.
According to an embodiment of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, the external diameter 5 ~ 6mm less of the external diameter of API standard box cupling of described box cupling.
The oil bushing threaded connector of high torque resistant high leakproofness of the present utility model adopts trapezoidal thread design, can reduce bearing surface angle, improves joint bonding strength, reduces thread interference amount, reduces screw thread Contact stress and improve the anti-stick button ability of joint.Wherein adopt the metal interference fit structure of conical seal (contact) face, improve the sealing intensity of joint, ensure that stretching, joint sealing performance under bending, compression combined load; Adopt the fit structure of negative angle torque resistant shoulder, while strengthening the anti-torque capability excessively of joint, play the effect of auxiliary seal; Adopt coupling face to dock fit structure with the interference that the right angle torque resistant shoulder of body is formed afterwards at upper button, further increase the anti-mistake moment of torsion of joint, anti-compression properties play the effect of auxiliary seal.
Accompanying drawing explanation
Fig. 1 is the fit structure sectional view of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model.
Fig. 2 is the structure sectional view of box cupling in the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model.
Fig. 3 A is the part-structure sectional view of the close end of the oil bushing threaded connector middle tube body of high torque resistant high leakproofness of the present utility model.
Fig. 3 B is the part-structure sectional view away from end of the oil bushing threaded connector middle tube body of high torque resistant high leakproofness of the present utility model.
Description of reference numerals:
1-box cupling, 11-mid-plane, 12-first negative angle torque resistant shoulder, 13-first seal section, 14-internal thread segment, 15-bore hole face, 16-right angle end face, 2-body, 21-second negative angle torque resistant shoulder, 22-arc-shaped transitional surface, 23-second cone seal section, 24-external thread section, 25-escape, 26-right angle torque resistant shoulder.
Detailed description of the invention
Hereinafter, the oil bushing threaded connector of the high torque resistant high leakproofness to the utility model exemplary embodiment is described in detail.
According to exemplary embodiment of the present utility model, the oil bushing threaded connector of described high torque resistant high leakproofness comprises box cupling 1 and two bodys 2, and the two ends of box cupling 1 are threaded with two bodys 2 respectively, realizes the sealing of pipeline connection and oil circuit or gas circuit thus.The utility model mainly solves the problem existing for existing joint by the structure and fit structure improving box cupling 1 and body 2, and wherein, the improvement of box cupling 1, body 2 and fit structure thereof is described as follows.
Fig. 1 is the fit structure sectional view of the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, Fig. 2 is the structure sectional view of box cupling in the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model, Fig. 3 A is the part-structure sectional view of the close end of the oil bushing threaded connector middle tube body of high torque resistant high leakproofness of the present utility model, and Fig. 3 B is the part-structure sectional view away from end of the oil bushing threaded connector middle tube body of high torque resistant high leakproofness of the present utility model.
As shown in Figure 2, the inner surface of box cupling 1 is divided into two symmetrical cross-talk inner surfaces by the mid-plane 11 of box cupling, described sub-inner surface comprises the first negative angle torque resistant shoulder 12, first cone seal section 13 and the internal thread segment 14 set gradually to end by the middle part of box cupling 1, and the two ends of box cupling are right angle end face 16.As shown in Figure 3 A and Figure 3 B, the external surface of the end of body 2 comprises the second negative angle torque resistant shoulder 21, the second cone seal section 23, external thread section 24 and the right angle torque resistant shoulder 26 that are set gradually to middle part by the end of body 2.
According to an embodiment of the present utility model, the sub-inner surface of box cupling 1 also comprises the bore hole face 15 between internal thread segment 14 and right angle end face 16, the external surface of the end of body 2 also comprises the escape 25 between external thread section 24 and right angle torque resistant shoulder 26, and bore hole face 15 and escape 25 are the auxiliary structure adding and produce man-hour.
Wherein, internal thread segment 14 and the trapezoidal thread of external thread section 24 for working in coordination, internal thread segment 14 can coordinate with external thread section 24 and realizes being threaded between box cupling 1 with body 2 thus.
As shown in the figure, when two bodys 2 are connected respectively to the two ends of box cupling 1, the first negative angle torque resistant shoulder 12 and the second negative angle torque resistant shoulder 21 form interference fit, and play anti-effect of crossing moment of torsion and auxiliary seal; First cone seal section 13 and the second cone seal section 23 form interference fit, and form main seal structure, improve the sealing intensity of joint, also assures that stretching, joint sealing performance under bending, compression combined load; The right angle end face 16 of box cupling 1 and the right angle torque resistant shoulder 26 of body 2 form interference and dock and coordinate, and what further increase joint anti-ly crosses moment of torsion, anti-compression properties play the effect of auxiliary seal.
According to the utility model, above-mentioned trapezoidal thread, for entirely to push up screw thread, avoids the impact of black threads on thread gluing, can improve the bonding strength of screw thread simultaneously.And according to an embodiment of the present utility model, the spigot surface angle of above-mentioned trapezoidal thread is 20 °, bearing surface angle is 3 °, flank tapering is 1:16, thread interference amount is 0.15 ~ 0.2mm, flight pitch is 3.175mm, 4.234mm or 5.08mm.Wherein, can according to the flight pitch of above-mentioned three specifications of different choice of box cupling or outer tube diameter.
According to exemplary embodiment of the present utility model, the angle of above-mentioned first cone seal section 13 and the second cone seal section 23 is 3 ~ 5 °, the length of the first cone seal section 13 and the second cone seal section 23 is 5 ~ 10mm, and the magnitude of interference of the interference fit that the first cone seal section 13 and the second cone seal section 23 are formed is 0.2 ~ 0.4mm, similarly can according to the length of the different choice conical seal (contact) face of box cupling 1 or body 2 external diameter, the possibility of sealing surface generation thread gluing can be efficiently avoid by the design of suitable seal section length and the magnitude of interference.The angle of above-mentioned first negative angle torque resistant shoulder 12 and the second negative angle torque resistant shoulder 21 is-10 ~-12 °, and the magnitude of interference of the interference fit that the first negative angle torque resistant shoulder 12 and the second negative angle torque resistant shoulder 21 are formed is 0.15 ~ 0.25mm.It is 0.1 ~ 0.15mm that the magnitude of interference coordinated is docked in the interference that the right angle end face 16 of above-mentioned box cupling 1 and the right angle torque resistant shoulder 26 of body 2 are formed.
In order to avoid stress is concentrated, the second negative angle torque resistant shoulder 21 is preferably made to adopt transition circle cambered surface 22 to be connected with between the second cone seal section 23.In order to reduce the energy loss that turbulent flow causes, by processing the inwall of body 2, the junction of the inner surface of the inner surface of body 2 and box cupling 1 can be formed and is connected smoothly.Further, in order to ensure intensity and the performance of body 2, thickening process can being carried out in the end of body 2, even if the end of body 2 has the thick section through thickening process, such as, being set to the external diameter 5 ~ 6mm larger than the external diameter of the non-thick section of body of thick section.Meanwhile, be connected fit system based on box cupling in the utility model 1 with the special of body 2, interior by property in order to improve, the external diameter of box cupling 15 ~ 6mm less of the external diameter of API standard box cupling can be made.Above structure is more excellent set-up mode, and the utility model is not limited thereto.
In sum, the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model adopts trapezoidal thread structure to connect, reduce bearing surface angle, improve joint bonding strength, decrease thread interference amount, reduce screw thread Contact stress and improve the anti-stick button ability of joint, by arranging cone seal fit structure and high resistance torque shoulder fit structure, whole oil bushing threaded connector is made to have good switching performance, high sealing performance and high resistance torsional performance and bending resistance.
Although describe the oil bushing threaded connector of high torque resistant high leakproofness of the present utility model above in conjunction with exemplary embodiment, but those of ordinary skill in the art should be clear, when not departing from the spirit and scope of claim, various amendment can be carried out to above-described embodiment.
Claims (10)
1. an oil bushing threaded connector for high torque resistant high leakproofness, described nipple comprises box cupling and two bodys, and the two ends of described box cupling are threaded with described two bodys respectively, it is characterized in that,
The inner surface of described box cupling is divided into two symmetrical cross-talk inner surfaces by the mid-plane of box cupling, described sub-inner surface comprises the first negative angle torque resistant shoulder, the first cone seal section and the internal thread segment that are set gradually to end by the middle part of box cupling, and the two ends of described box cupling are right angle end face;
The external surface of the end of described body comprises the second negative angle torque resistant shoulder, the second cone seal section, external thread section and the right angle torque resistant shoulder that are set gradually to middle part by the end of body;
Wherein, described internal thread segment and external thread section are the trapezoidal thread of working in coordination; When described two bodys are connected respectively to the two ends of described box cupling, described first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder form interference fit, described first cone seal section and the second cone seal section form interference fit, and the right angle end face of described box cupling and the right angle torque resistant shoulder of body form interference and dock and coordinate.
2. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, it is characterized in that, the sub-inner surface of described box cupling also comprises the bore hole face between internal thread segment and right angle end face, and the external surface of the end of described body also comprises the escape between external thread section and right angle torque resistant shoulder.
3. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, it is characterized in that, described trapezoidal thread for entirely to push up screw thread, and the spigot surface angle of described trapezoidal thread be 20 °, bearing surface angle is 3 °, flank tapering is 1:16, thread interference amount is 0.15 ~ 0.2mm, flight pitch is 3.175mm, 4.234mm or 5.08mm.
4. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, it is characterized in that, the angle of described first cone seal section and the second cone seal section is 3 ~ 5 °, the length of described first cone seal section and the second cone seal section is 5 ~ 10mm, and the magnitude of interference of the interference fit that described first cone seal section and the second cone seal section are formed is 0.2 ~ 0.4mm.
5. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, it is characterized in that, the angle of described first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder is-10 ~-12 °, and the magnitude of interference of the interference fit that the first negative angle torque resistant shoulder and the second negative angle torque resistant shoulder are formed is 0.15 ~ 0.25mm.
6. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, is characterized in that, it is 0.1 ~ 0.15mm that the magnitude of interference coordinated is docked in the interference that the right angle end face of described box cupling and the right angle torque resistant shoulder of body are formed.
7. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, is characterized in that, described second negative angle torque resistant shoulder adopts transition circle cambered surface to be connected with between the second cone seal section.
8. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, is characterized in that, the junction of the inner surface of described body and the inner surface of box cupling is formed and is connected smoothly.
9. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, is characterized in that, the end of described body has the thick section through thickening process, the external diameter 5 ~ 6mm larger than the external diameter of the non-thick section of body of described thick section.
10. the oil bushing threaded connector of high torque resistant high leakproofness according to claim 1, is characterized in that, the external diameter 5 ~ 6mm less of the external diameter of API standard box cupling of described box cupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420355662.6U CN204082029U (en) | 2014-06-30 | 2014-06-30 | A kind of oil bushing threaded connector of high torque resistant high leakproofness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420355662.6U CN204082029U (en) | 2014-06-30 | 2014-06-30 | A kind of oil bushing threaded connector of high torque resistant high leakproofness |
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| Publication Number | Publication Date |
|---|---|
| CN204082029U true CN204082029U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420355662.6U Expired - Fee Related CN204082029U (en) | 2014-06-30 | 2014-06-30 | A kind of oil bushing threaded connector of high torque resistant high leakproofness |
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| Country | Link |
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| CN (1) | CN204082029U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499888A (en) * | 2016-12-13 | 2017-03-15 | 大连凯泓科技有限公司 | High antitorque and docking does not increase the pipe docking structure of caliber |
| US9759327B2 (en) | 2015-08-18 | 2017-09-12 | Parker-Hannifin Corporation | Large perimeter segmented seals |
| CN113585984A (en) * | 2017-03-03 | 2021-11-02 | 安赛乐米塔尔管材产品卢森堡股份公司 | Improved torque shoulder for a connection |
-
2014
- 2014-06-30 CN CN201420355662.6U patent/CN204082029U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9759327B2 (en) | 2015-08-18 | 2017-09-12 | Parker-Hannifin Corporation | Large perimeter segmented seals |
| CN106499888A (en) * | 2016-12-13 | 2017-03-15 | 大连凯泓科技有限公司 | High antitorque and docking does not increase the pipe docking structure of caliber |
| CN113585984A (en) * | 2017-03-03 | 2021-11-02 | 安赛乐米塔尔管材产品卢森堡股份公司 | Improved torque shoulder for a connection |
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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 |
Granted publication date: 20150107 Termination date: 20170630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |