阅读说明：本技术 一种变径式油管接箍 (Reducing oil pipe coupling ) 是由 肖云东 于 2020-06-23 设计创作，主要内容包括：本发明涉及油管接箍技术领域,且公开了一种变径式油管接箍,包括油管接箍本体,所述油管接箍本体两端的内侧分别螺纹连接有第一连接油管和第二连接油管,所述油管接箍本体两端的内壁与第一连接油管一端的表面和第二连接油管一端的表面均设置有一个消能减震机构。本发明通过隔热衬套材料隔热的特性对油管接箍本体进行第一重隔热保护,再通过第一真空套板与第二真空套板组合结构内部设置的真空隔热型腔结构作为第二重隔热保护,并对隔热衬套进行覆盖保护,并且第一真空套板与第二真空套板组合结构较于现使用类似的整体真空套状结构而言,可根据使用时间以及意外破损等情况进行便捷更换维修,降低装置的故障几率。(The invention relates to the technical field of tubing coupling, and discloses a variable-diameter tubing coupling which comprises a tubing coupling body, wherein the inner sides of two ends of the tubing coupling body are respectively in threaded connection with a first connecting tubing and a second connecting tubing, and the inner walls of the two ends of the tubing coupling body, the surface of one end of the first connecting tubing and the surface of one end of the second connecting tubing are respectively provided with an energy dissipation and shock absorption mechanism. According to the invention, the oil pipe coupling body is subjected to first thermal insulation protection by virtue of the thermal insulation characteristic of the thermal insulation lining material, and then the vacuum thermal insulation cavity structure arranged in the combined structure of the first vacuum sleeve plate and the second vacuum sleeve plate is used as second thermal insulation protection to cover and protect the thermal insulation lining, and compared with the existing use of a similar integral vacuum sleeve-shaped structure, the combined structure of the first vacuum sleeve plate and the second vacuum sleeve plate can be conveniently replaced and maintained according to the use time, accidental damage and other conditions, so that the failure probability of the device is reduced.)

1. The utility model provides a reducing formula tubing coupling, includes tubing coupling body (1), its characterized in that: the inner sides of two ends of the tubing coupling body (1) are respectively in threaded connection with a first connecting tubing (2) and a second connecting tubing (3), the inner walls of two ends of the tubing coupling body (1) and the surface of one end of the first connecting tubing (2) and the surface of one end of the second connecting tubing (3) are respectively provided with an energy dissipation and damping mechanism (4), the end faces of two ends of the tubing coupling body (1) are movably connected with a non-metal taper sleeve (5), a fixing screw (9) is movably sleeved in the non-metal taper sleeve (5), one end of the fixing screw (9) is in threaded connection with the interior of the tubing coupling body (1), a heat insulation bushing (6) is sleeved on the surface of the tubing coupling body (1), a first vacuum sleeve plate (7) is movably connected on the surface of the top of the heat insulation bushing (6), a second vacuum sleeve plate (8) is movably connected on the surface of the bottom of the heat insulation bushing (6), the top of the second vacuum sleeve plate (8) is fixedly installed with the bottom of the first vacuum sleeve plate (7).

2. The variable diameter tubing coupling of claim 1, wherein: a first vacuum heat insulation cavity is formed in the first vacuum sleeve plate (7), a first air absorbent (12) is movably sleeved on the vacuum heat insulation cavity in the first vacuum sleeve plate (7), and the first air absorbent (12) is in a powder particle shape.

3. The variable diameter tubing coupling of claim 1, wherein: the vacuum heat insulation device is characterized in that a second vacuum heat insulation cavity is formed in the second vacuum sleeve plate (8), a second getter (13) is movably sleeved on the second vacuum heat insulation cavity in the second vacuum sleeve plate (8), the second getter (13) is also in a powder particle shape as the first getter (12), a cushion pad (10) is fixedly sleeved on the top of the second vacuum sleeve plate (8) and is clamped on the inner side of the bottom of the first vacuum sleeve plate (7), a first fastening screw (11) is connected to the inner side of the bottom of the first vacuum sleeve plate (7) in a threaded manner, and the middle of the first fastening screw (11) is movably sleeved on the inner side of the top of the second vacuum sleeve plate (8).

4. The variable diameter tubing coupling of claim 1, wherein: the diameter value of the second connecting oil pipe (3) is larger than that of the first connecting oil pipe (2), and the second connecting oil pipe (3) is not in contact with the first connecting oil pipe (2).

5. The variable diameter tubing coupling of claim 1, wherein: the terminal surface swing joint of fixed screw (9) one end has the tight set screw of second (14), and the tight set screw of second (14) threaded connection is in the inside of nonmetal taper sleeve (5), the terminal surface of the tight set screw of second (14) one end is on same horizontal plane with the side on one side of nonmetal taper sleeve (5), the tight set screw of second (14) is the same with the material of nonmetal taper sleeve (5).

6. The variable diameter tubing coupling of claim 1, wherein: one side of the non-metal taper sleeve (5) is in a taper shape, and the side face of the other side of the non-metal taper sleeve (5) is tightly attached to the end faces of the first vacuum sleeve plate (7) and the second vacuum sleeve plate (8) respectively.

7. The variable diameter tubing coupling of claim 1, wherein: two the inside of energy dissipation damper (4) respectively including an annular cover (41), two annular cover (41) activity respectively cup joints on the surface of second connection oil pipe (3) one end and the surface of first connection oil pipe (2) one end, annular cover (41) top surface and the equal fixedly connected with first buffer spring (42) in bottom surface, the one end fixedly connected with movable block (43) of first buffer spring (42), the inside joint of movable block (43) has anticreep slide rail (44), the side fixedly connected with second buffer spring (45) of movable block (43) one side, the one end fixed connection of anticreep slide rail (44) and second buffer spring (45) is on the inner wall of oil pipe coupling body (1).

8. The variable diameter tubing coupling of claim 1, wherein: the length value of the heat insulation lining (6) is the same as that of the tubing coupling body (1), and the heat insulation lining (6) can be made of polytetrafluoroethylene materials.

Technical Field

The invention relates to the technical field of tubing couplings, in particular to a variable-diameter tubing coupling.

Background

The tubing coupling is one of oilfield drilling tools, is mainly used for connecting tubing, mainly solves the problem that the existing coupling is easy to fatigue and break due to stress concentration, has the characteristics of difficult fatigue and breakage, good connection effect and the like, and can effectively prevent the occurrence of oil well string disconnection accidents.

However, the currently used tubing coupling still has some problems to be further improved in practical production application, firstly, the existing tubing is mostly used in the underground with the depth of thousands of meters, the heat loss when heating steam is conveyed to the underground through the tubing is large due to the large temperature difference of the underground heat transfer caused by the well depth and oil thickening, and the heat resistance of the steel tube is small, meanwhile, the heat loss when thick oil is conveyed to the ground from the underground through the tubing is also large, and the reason for this is that the heat preservation performance of the tubing coupling is low, which is one of the main factors causing the above problems, and for the above problems, technical personnel also propose to sleeve the heat insulation bushing on the surface of the tubing coupling for heat insulation, although a certain effect can be obtained, the heat insulation effect will be worse and worse along with the corrosion of the heat insulation bushing by the underground liquid and the aging of the self material, secondly, for various reasons in the development and production of some oil field thick oil, thin oil and, the individual well can cause well killing fluid to enter the stratum due to serious stratum leakage, then combustible gas enters an annular space formed by combining the oil pipe and the tubing coupling, when the oil pipe and tubing coupling assembly enters the well, the combustible gas between a connecting gap between the fuel oil pipe and the tubing coupling can be led to cause safety accidents due to sparks generated by friction, and thirdly, the threaded connection part of the tubing coupling and the oil pipe is lack of a stress sharing vibration structure and needs to be further improved.

Disclosure of Invention

The invention provides a reducing type oil pipe coupling, which solves the problems in the prior art.

The invention provides the following technical scheme: a reducing oil pipe coupling comprises an oil pipe coupling body, wherein the inner sides of two ends of the oil pipe coupling body are respectively in threaded connection with a first connecting oil pipe and a second connecting oil pipe, the inner walls of the two ends of the tubing coupling body, the surface of one end of the first connecting tubing and the surface of one end of the second connecting tubing are both provided with an energy dissipation and shock absorption mechanism, the end surfaces of the two ends of the oil pipe coupling body are movably connected with non-metal taper sleeves, the inner parts of the non-metal taper sleeves are movably sleeved with fixing screws, one end of the fixing screw is connected with the inside of the tubing coupling body in a threaded manner, the surface of the tubing coupling body is fixedly sleeved with a heat insulation lining, the surface of the top of the heat insulation bushing is movably connected with a first vacuum sleeve plate, the surface of the bottom of the heat insulation bushing is movably connected with a second vacuum sleeve plate, and the top of the second vacuum sleeve plate is fixedly installed together with the bottom of the first vacuum sleeve plate.

Carefully selecting, a first vacuum heat insulation cavity is formed in the first vacuum sleeve plate, a first air absorbent is movably sleeved on the vacuum heat insulation cavity in the first vacuum sleeve plate, and the first air absorbent is in the form of powder particles.

The second vacuum heat insulation cavity is formed in the second vacuum sleeve plate, a second getter is movably sleeved on the second vacuum heat insulation cavity in the second vacuum sleeve plate, the second getter and the first getter are also in a powder particle shape, a cushion pad is fixedly sleeved on the top of the second vacuum sleeve plate and is clamped on the inner side of the bottom of the first vacuum sleeve plate together, a first tightening screw is connected to the inner side of the bottom of the first vacuum sleeve plate in a threaded mode, and the middle of the first tightening screw is movably sleeved on the inner side of the top of the second vacuum sleeve plate.

And carefully selecting, wherein the diameter value of the second connecting oil pipe is larger than that of the first connecting oil pipe, and the second connecting oil pipe is not in contact with the first connecting oil pipe.

Carefully, the terminal surface swing joint of set screw one end has the tight set screw of second, and the tight set screw threaded connection of second is in the inside of nonmetal taper sleeve, the terminal surface of the tight set screw one end of second is on same horizontal plane with the side of nonmetal taper sleeve one side, the tight set screw of second is the same with the material of nonmetal taper sleeve.

And carefully selecting, wherein one side of the non-metal taper sleeve is in a taper shape, and the side surface of the other side of the non-metal taper sleeve is tightly attached to the end surfaces of the first vacuum sleeve plate and the second vacuum sleeve plate respectively.

Carefully, two energy dissipation damper's inside respectively including an annular cover, two the annular cover is the activity respectively cup joints on the surface of second connection oil pipe one end and the surface of first connection oil pipe one end, the equal fixedly connected with first buffer spring in annular cover top surface and bottom surface, the one end fixedly connected with movable block of first buffer spring, the inside joint of movable block has the anticreep slide rail, the side fixedly connected with second buffer spring of movable block one side, the one end fixed connection of anticreep slide rail and second buffer spring is on the inner wall of oil pipe coupling body.

Preferably, the length of the heat insulation lining is the same as that of the tubing coupling body, and the heat insulation lining can be made of polytetrafluoroethylene materials.

The invention has the following beneficial effects:

1. according to the invention, the oil pipe coupling body is subjected to first thermal insulation protection by virtue of the thermal insulation characteristic of the thermal insulation lining material, and then the vacuum thermal insulation cavity structure arranged in the combined structure of the first vacuum sleeve plate and the second vacuum sleeve plate is used as second thermal insulation protection to cover and protect the thermal insulation lining, and compared with the existing use of a similar integral vacuum sleeve-shaped structure, the combined structure of the first vacuum sleeve plate and the second vacuum sleeve plate can be conveniently replaced and maintained according to the use time, accidental damage and other conditions, so that the failure probability of the device is reduced.

2. According to the invention, the nonmetal taper sleeve is used for preventing the oil pipe coupling body from generating sparks due to friction with a well wall in the process of going into the well, so that the potential safety hazard that the sparks generated due to friction ignite combustible gas in connecting gaps among the second connecting oil pipe, the first connecting oil pipe and the oil pipe coupling body is solved.

3. According to the invention, the annular sleeves in the two energy dissipation and shock absorption mechanisms are respectively movably sleeved on the surfaces of one ends of the second connecting oil pipe and the first connecting oil pipe, stress shock generated when a conveying pipeline consisting of the second connecting oil pipe, the first connecting oil pipe and the oil pipe coupling body is used for conveying oil is transmitted to the first buffer spring and the second buffer spring, the first buffer spring is pressed and deformed to drive the movable block to perform sliding friction on the top of the anti-falling slide rail so as to perform energy dissipation and shock absorption and elastic buffering of the second buffer spring, and then when the device runs, the connection stress shock between the second connecting oil pipe, the first connecting oil pipe and the oil pipe coupling body is shared, so that the stability of a combined structure of the second connecting oil pipe, the first connecting oil pipe and the oil pipe coupling body is further optimized.

Drawings

FIG. 1 is a schematic cross-sectional view of a tubing coupling body of the present invention;

FIG. 2 is a perspective view of a first vacuum deck of the present invention;

FIG. 3 is a schematic cross-sectional view of a first vacuum deck of the inventive structure;

FIG. 4 is an enlarged view of the point A in FIG. 1;

FIG. 5 is an enlarged view of the point B in FIG. 3 according to the present invention.

In the figure: 1. a tubing coupling body; 2. a first connecting oil pipe; 3. a second connecting oil pipe; 4. an energy dissipation and shock absorption mechanism; 41. an annular sleeve; 42. a first buffer spring; 43. a movable block; 44. an anti-drop slide rail; 45. a second buffer spring; 5. a non-metal taper sleeve; 6. a thermally insulating liner; 7. a first vacuum deck; 8. a second vacuum deck; 9. fixing screws; 10. a cushion pad; 11. a first set screw; 12. a first getter agent; 13. a second getter; 14. a second set screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a reducing tubing coupling comprises a tubing coupling body 1, wherein the inner sides of two ends of the tubing coupling body 1 are respectively connected with a first connecting tubing 2 and a second connecting tubing 3 by screw threads, the diameter of the second connecting tubing 3 is larger than that of the first connecting tubing 2, the second connecting tubing 3 is not in contact with the first connecting tubing 2, the tubing coupling body 1 stably connects the first connecting tubing 2 and the second connecting tubing 3 to realize reducing connection of the first connecting tubing 2 and the second connecting tubing 3, the inner walls of the two ends of the tubing coupling body 1, the surface of one end of the first connecting tubing 2 and the surface of one end of the second connecting tubing 3 are respectively provided with a damping mechanism 4, the two energy dissipation damping mechanisms 4 respectively comprise an annular sleeve 41, the two annular sleeves 41 are respectively movably sleeved on the surface of one end of the second connecting tubing 3 and the surface of one end of the first connecting tubing 2, the top surface and the bottom surface of the annular sleeve 41 are both fixedly connected with a first buffer spring 42, one end of the first buffer spring 42 is fixedly connected with a movable block 43, an anti-drop slide rail 44 is clamped inside the movable block 43, the side surface of one side of the movable block 43 is fixedly connected with a second buffer spring 45, one ends of the anti-drop slide rail 44 and the second buffer spring 45 are fixedly connected on the inner wall of the tubing coupling body 1, the annular sleeve 41 inside the two energy dissipation and shock absorption mechanisms 4 is respectively and movably sleeved on the surfaces of one end of the second connecting tubing 3 and one end of the first connecting tubing 2, stress shock generated when the conveying pipeline composed of the second connecting tubing 3, the first connecting tubing 2 and the tubing coupling body 1 conveys oil is transmitted to the first buffer spring 42 and the second buffer spring 45, the first buffer spring 42 is pressed and deformed to drive the movable block 43 to slide and rub on the top of the anti-drop slide rail 44 for shock absorption and elastic buffer of the second buffer spring 45, and then when the device runs, the connection stress vibration between the second connecting oil pipe 3, the first connecting oil pipe 2 and the tubing coupling body 1 is shared, the stability of the combined structure of the second connecting oil pipe 3, the first connecting oil pipe 2 and the tubing coupling body 1 is further optimized, the end surfaces of the two ends of the tubing coupling body 1 are movably connected with the non-metal taper sleeves 5, one side of each non-metal taper sleeve 5 is tapered, the side surface of the other side of each non-metal taper sleeve 5 is tightly attached to the end surfaces of the first vacuum sleeve plate 7 and the second vacuum sleeve plate 8 respectively, the non-metal taper sleeves 5 prevent the tubing coupling body 1 from generating sparks due to friction with the well wall in the process of going down the well, the potential safety hazard of combustible gas among connecting gaps among the second connecting oil pipe 3, the first connecting oil pipe 2 and the tubing coupling body 1 due to the sparks generated by the friction is solved, and the fixing screws 9 are movably sleeved in the non-metal taper, the end face of one end of the fixed screw 9 is movably connected with a second fastening screw 14, the second fastening screw 14 is in threaded connection with the inside of the nonmetal taper sleeve 5, the end face of one end of the second fastening screw 14 is on the same horizontal plane with the side face of one side of the nonmetal taper sleeve 5, the second fastening screw 14 is made of the same material as the nonmetal taper sleeve 5, the second fastening screw 14 covers the metal structure of the fixed screw 9 to avoid subsequent accidental friction, the side face of the nonmetal taper sleeve 5 is kept flat, the attractiveness of the nonmetal taper sleeve 5 is improved, one end of the fixed screw 9 is in threaded connection with the inside of the tubing coupling body 1, the surface of the tubing coupling body 1 is fixedly sleeved with a heat insulation bush 6, the length value of the heat insulation bush 6 is the same as that of the tubing coupling body 1, the heat insulation bush 6 can be made of polytetrafluoroethylene material, the first heat insulation protection is performed on the tubing coupling body 1 through the heat insulation characteristic of the material of the heat insulation bush, the heat dissipated by the oil pipe coupling body 1 is reduced preliminarily, the surface of the top of the heat insulation lining 6 is movably connected with a first vacuum sleeve plate 7, a first vacuum heat insulation cavity is formed in the first vacuum sleeve plate 7, a first getter 12 is movably sleeved in the vacuum heat insulation cavity in the first vacuum sleeve plate 7, the first getter 12 is in a powder particle shape and provides a heat insulation space for the first vacuum sleeve plate 7, the heat insulation function of the first vacuum sleeve plate 7 is realized, the first getter 12 can further reduce the air content in the first vacuum heat insulation cavity and ensure the reliability of the heat insulation function of the first vacuum sleeve plate 7, the surface of the bottom of the heat insulation lining 6 is movably connected with a second vacuum sleeve plate 8, a second vacuum heat insulation cavity is formed in the second vacuum sleeve plate 8, and a second getter 13 is movably sleeved in the second vacuum heat insulation cavity in the second vacuum sleeve plate 8, the second getter 13 is also in powder particle shape as the first getter 12, the top of the second vacuum sleeve plate 8 is fixedly sleeved with a cushion pad 10 and is clamped at the inner side of the bottom of the first vacuum sleeve plate 7, the inner side of the bottom of the first vacuum sleeve plate 7 is in threaded connection with a first fastening screw 11, the middle part of the first fastening screw 11 is movably sleeved at the inner side of the top of the second vacuum sleeve plate 8, the second vacuum heat insulation cavity provides a heat insulation space for the second vacuum sleeve plate 8 to realize the heat insulation function of the second vacuum sleeve plate 8, the second getter 13 can further reduce the air content in the second vacuum heat insulation cavity, and the combined structure of the first vacuum sleeve plate 7 is matched to form second heat insulation protection for the oil pipe coupling body 1, and the heat insulation lining 6 is covered and protected, the aging failure speed of the heat insulation lining 6 is reduced, and the top of the second vacuum sleeve plate 8 is fixedly arranged with the bottom of the first vacuum sleeve plate 7.

The working principle is as follows: when the combined structure of the tubing coupling body 1, the first connecting tubing 2 and the second connecting tubing 3 descends to enter a designated wellhead, the nonmetal taper sleeves 5 arranged on the end faces of the two ends of the tubing coupling body 1 can separate the end face of the tubing coupling body 1 from a well wall, so that spark caused by friction is avoided, in the production and use process, the heat insulation characteristic of the heat insulation lining 6 material is used for carrying out first heat insulation protection on the tubing coupling body 1, the vacuum heat insulation cavity structure arranged inside the combined structure of the first vacuum sleeve plate 7 and the second vacuum sleeve plate 8 of a receiver is used as second heat insulation protection, the heat insulation lining 6 is covered and protected, the tubing coupling body 1 is fully protected, in the production and use process, stress vibration between the combined structure of the tubing coupling body 1, the first connecting tubing 2 and the second connecting tubing 3 can be respectively and movably sleeved inside the two energy dissipation vibration dissipation mechanisms 4 in the second connecting tubing 3 and the first connecting tubing 3 2 annular sleeve 41 on one end surface, the stress vibrations that produce when carrying oil with the pipeline that second connecting oil pipe 3, first connecting oil pipe 2, tubing coupling body 1 three constitutes conduct to first buffer spring 42 and second buffer spring 45, utilize first buffer spring 42 pressurized deformation to drive movable block 43 and carry out the friction that slides at the top of anticreep slide rail 44 and carry out energy dissipation shock attenuation and the deformation elastic buffering of second buffer spring 45, stability when guaranteeing tubing coupling body 1, first connecting oil pipe 2, the oil delivery of the three integrated configuration of second connecting oil pipe 3.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the invention, the filling pattern is only used for distinguishing the layers and is not limited at all.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.