Resistance reduction nipple structure of oil pipe

Abstract

The utility model relates to the technical field of petroleum processing, and discloses an oil pipe anti-drag pup joint structure which comprises a first pup joint and a second pup joint, as a preferable technical scheme of the utility model, the opposite ends of the first pup joint and the second pup joint are connected with each other, and the first pup joint is connected with the second pup joint. The back ends of the first short section and the second short section are fixedly connected with an oil pipe front end and an oil pipe rear end respectively, an upper rocker arm and a lower rocker arm are arranged outside the first short section, and one end, close to the second short section, of each rocker arm is provided with the end of the first short section and fixedly connected with a hinge piece. Due to the arrangement of the rocker arm, the movable sleeve can be conveniently moved to the front end of the second short section by a worker under the matching of the rotating shaft and the hinging piece, and the movable sleeve can be sleeved on the second short section when the first short section and the second short section are not coaxial, so that the first short section can be dragged to be slowly close to the second short section by rotating the movable sleeve; and finally, the effect that the first short section and the second short section can be conveniently and quickly butted by a worker can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of petroleum processing technology, and more specifically, to a short section structure for reducing drag in oil pipes. Background Technology

[0002] With the improvement of drilling and extraction technology, the application of horizontal well extraction technology is becoming wider and wider. This is because horizontal wells can greatly increase the contact area between the wellbore and the oil layer, reduce energy loss, and significantly increase the production capacity of oil and gas wells, as well as extend the stable production period.

[0003] However, in the current oil and gas development process, as the horizontal section of a horizontal well gradually lengthens, the friction between the tubing and the casing wall increases during tubing descent, leading to difficulties in tubing descent or even failure to reach the target layer. This poses significant challenges to horizontal well development. Therefore, drag-reducing short sections are typically installed on the tubing to reduce contact friction between the tubing arm and the well wall. However, these drag-reducing short sections need to be connected to both ends of the tubing interface before the two short sections are joined. During this connection process, workers usually manually move the tubing ends to calibrate the two short sections and ensure accurate connection. However, the tubing is heavy and bulky, making movement difficult, time-consuming, and labor-intensive. Therefore, it is necessary to develop a tubing drag-reducing short section structure that facilitates calibration and connection. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a short section structure for reducing oil pipe drag.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drag-reducing short section structure for oil pipes, comprising a first short section and a second short section. As a preferred technical solution of this utility model, the opposing ends of the first short section and the second short section are connected to each other, and the opposing ends of the first short section and the second short section are respectively fixedly connected to the front end and the rear end of the oil pipe. The first short section is provided with two rocker arms, one upper and one lower. The end of the rocker arm near the second short section is provided with the end of the first short section and is fixedly connected with a hinge. A connecting ring located at the end of the first short section is fixedly connected between the two hinges. A movable sleeve is provided on the outer surface of the connecting ring near the second short section. The movable sleeve is threaded onto the outer surface of the second short section. A snap-fit ​​ring is fixedly connected on the outer surface of the movable sleeve near the connecting ring. The snap-fit ​​ring is rotatably sleeved inside the connecting ring.

[0006] As a preferred embodiment of this utility model, two left and right mating rings are provided between the first short section and the second short section. The opposing surfaces of the two mating rings are sealed and fitted together. A fixing ring is fixedly connected to the back side of each of the two mating rings. The other ends of the two fixing rings are fixedly connected to the first short section and the second short section, respectively.

[0007] As a preferred embodiment of this utility model, the inner diameters of the fixing ring, the docking ring, the first short section, and the second short section are the same, and the fixing ring is smoothly connected to the inner walls of the first short section and the second short section.

[0008] As a preferred embodiment of this utility model, a reinforcing ring is fixedly fitted to the outside of the movable sleeve, and a number of balls are embedded on the outside of the reinforcing ring.

[0009] As a preferred technical solution of this utility model, a sliding groove is provided on the outer surface of the first short section, located below the rocker arm. A slider is slidably engaged inside the sliding groove, and a rotating shaft is rotatably sleeved inside the slider. One end of the rotating shaft passes through the slider and extends to the outside of the sliding groove and is fixedly connected to one end of the rocker arm.

[0010] As a preferred embodiment of this utility model, both of the mating rings are provided with external threads, and the external threads of the two mating rings rotate in opposite directions.

[0011] As a preferred technical solution of this utility model, a linkage sleeve is provided between the two docking rings, and an anti-slip strip is fixedly connected to the outer surface of the linkage sleeve. The two ends of the linkage sleeve are threaded onto the outer surfaces of the two docking rings, and the length of the linkage sleeve is smaller than the overall length of the two fixed rings and the docking rings.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] Due to the rocker arm, this invention allows workers to easily move the movable sleeve to the front end of the second short section in conjunction with the rotating shaft and the hinge. It also ensures that the movable sleeve can be fitted onto the second short section when the first and second short sections are not coaxial. By rotating the movable sleeve, the first short section can be dragged slowly towards the second short section, thus achieving the effect of allowing workers to quickly and easily connect the first and second short sections.

[0014] Due to the linkage sleeve, this invention allows the two docking rings to fit tightly together through the fixing ring, and then the first and second short sections to connect smoothly, ensuring smooth oil transportation. The design of the first short section, the second short section, and the movable sleeve increases the outer diameter of the pipeline, thereby avoiding friction between the tubing and the well wall, while the ball bearings further reduce the friction intensity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a front view of the present invention;

[0017] Figure 3This is a cross-sectional view of the front of the first short section structure of this utility model;

[0018] Figure 4 This is a cross-sectional view of the front of the second short section structure of this utility model.

[0019] In the diagram: 1. Front end of oil pipe; 2. Rear end of oil pipe; 3. First short section; 4. Second short section; 5. Rocker arm; 6. Hinge; 7. Connecting ring; 8. Movable sleeve; 9. Snap-fit ​​ring; 10. Reinforcing ring; 11. Ball bearing; 12. Slide groove; 13. Slider; 14. Rotating shaft; 15. Fixed ring; 16. Connecting ring; 17. Linkage sleeve; 18. Anti-slip strip. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 4 As shown, this utility model provides a drag-reducing short section structure for oil pipes, including a first short section 3 and a second short section 4. In a preferred embodiment, the first short section 3 and the second short section 4 are connected to each other at their facing ends, and an oil pipe front end 1 and an oil pipe rear end 2 are respectively fixedly connected to the back ends of the first short section 3 and the second short section 4. Two rocker arms 5 are provided on the outside of the first short section 3. One end of the rocker arm 5 near the second short section 4 is connected to the end of the first short section 3 and a hinge 6 is fixedly connected thereto. A connecting ring 7 located at the end of the first short section 3 is fixedly connected between the two hinges 6. A groove is provided on the outer surface of the connecting ring 7 near the second short section 4. The movable sleeve 8 is threaded onto the outer surface of the second short section 4. A snap ring 9 is fixedly connected to the outer surface of the movable sleeve 8 near the connecting ring 7. The snap ring 9 is rotatably sleeved inside the connecting ring 7. Due to the setting of the rocker arm 5, with the cooperation of the rotating shaft 14 and the hinge 6, the worker can easily move the movable sleeve 8 to the front end of the second short section 4. This ensures that the movable sleeve 8 can be sleeved onto the second short section 4 when the first short section 3 and the second short section 4 are not coaxial. Then, by rotating the movable sleeve 8, the first short section 3 can be dragged slowly towards the second short section 4. Finally, the worker can quickly and easily connect the first short section 3 and the second short section 4.

[0022] The first short section 3 and the second short section 4 are provided with two left and right docking rings 16. The facing surfaces of the two docking rings 16 are sealed and fitted together. Each of the two docking rings 16 is fixedly connected to a fixing ring 15 on its back side. The other ends of the two fixing rings 15 are fixedly connected to the first short section 3 and the second short section 4 respectively. Due to the setting of the two docking rings 16, the two docking rings 16 can be accurately docked through the linkage sleeve 17 with the cooperation of the fixing rings 15, which greatly facilitates the sealing connection of the oil pipe short section.

[0023] The fixing ring 15, the docking ring 16, the first short section 3 and the second short section 4 have the same inner diameter, and the fixing ring 15 is smoothly connected to the inner wall of the first short section 3 and the second short section 4.

[0024] Among them, the movable sleeve 8 is fixedly sleeved with a reinforcing ring 10, and a number of balls 11 are embedded on the outside of the reinforcing ring 10; the arrangement of the first short section 3, the second short section 4 and the movable sleeve 8 increases the outer diameter of the pipe, thereby avoiding friction between the oil pipe and the well wall, and the arrangement of the balls 11 further reduces the friction intensity.

[0025] The first short section 3 has a groove 12 on its outer surface located below the rocker arm 5. A slider 13 is slidably engaged inside the groove 12. A rotating shaft 14 is rotatably sleeved inside the slider 13. One end of the rotating shaft 14 passes through the slider 13 and extends to the outside of the groove 12 and is fixedly connected to one end of the rocker arm 5. Due to the setting of the groove 12, the rocker arm 5 and the movable sleeve 8 can be easily moved by the worker with the cooperation of the slider 13. At the same time, under the restriction of the slider 13 by the groove 12, the first short section 3 can be moved by the rocker arm 5 as the movable sleeve 8 moves, so that the first short section 3 can slowly approach the second short section 4, which can effectively improve the calibration efficiency and reduce the physical exertion during calibration.

[0026] Both mating rings 16 have external threads, and the external threads of the two mating rings 16 rotate in opposite directions.

[0027] A linkage sleeve 17 is provided between the two docking rings 16. An anti-slip strip 18 is fixedly connected to the outer surface of the linkage sleeve 17. The two ends of the linkage sleeve 17 are threaded onto the outer surface of the two docking rings 16. The length of the linkage sleeve 17 is smaller than the overall length of the two fixed rings 15 and the docking rings 16. Due to the setting of the linkage sleeve 17, the two docking rings 16 can be tightly fitted by the fixed rings 15 with the cooperation of the two docking rings 16. Then, with the cooperation of the fixed rings 15, the first short section 3 and the second short section 4 are smoothly connected to ensure smooth oil transportation.

[0028] Working principle and usage process of this utility model:

[0029] The first short section 3 and the second short section 4 are fixedly connected to the front end 1 and the rear end 2 of the oil pipe, respectively. When the first short section 3 and the second short section 4 approach each other as the front end 1 and the rear end 2 of the oil pipe need to be precisely connected, the movable sleeve 8 is moved and fitted onto the front end of the second short section 4 with the cooperation of the sliding groove 12, the slider 13, the rotating shaft 14, the hinge 6, the connecting ring 7, and the snap ring 9. Then, the movable sleeve 8 is rotated and moved along the surface of the second short section 4 with the threaded engagement, so that the first short section 3 and the second short section 4 slowly approach each other. Then, with the assistance of the worker, the first short section 3 and the second short section 4 are easily calibrated. Then, the movable sleeve 8 is rotated until the other end of the linkage sleeve 17 approaches the second short section 4. Then, the linkage sleeve 17 is rotated and the two docking rings 16 are moved towards each other with the threaded engagement. Then, the first short section 3 and the second short section 4 are moved towards each other through the fixed ring 15 until the two docking rings 16 are tightly fitted together to complete the sealing docking.

[0030] Since the outer diameter of the first short section 3 and the second short section 4 is larger than the outer diameter of the front end 1 and the rear end 2 of the tubing, when the short section moves with the tubing inside the well wall, it can avoid direct contact between the front end 1 and the rear end 2 of the tubing and the well wall, effectively avoiding friction. Furthermore, since the ball bearings 11 set on the outside of the movable sleeve 8 through the reinforcing ring 10 cause the ball bearings 11 to roll along the well wall, it can avoid friction between the first short section 3 and the second short section 4 and the well wall.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drag-reducing short section structure for oil pipes, comprising a first short section (3) and a second short section (4), characterized in that: The first short section (3) and the second short section (4) are connected to each other at opposite ends. The first short section (3) and the second short section (4) are respectively fixedly connected to the front end (1) and the rear end (2) of the oil pipe. The first short section (3) is provided with two rocker arms (5) on its outside. The rocker arm (5) near the second short section (4) has the end of the first short section (3) provided and is fixedly connected with a hinge (6). The two hinges (6) are fixedly connected to a connecting ring (7) located at the end of the first short section (3). The outer surface of the connecting ring (7) near the second short section (4) is provided with a movable sleeve (8). The movable sleeve (8) is threaded onto the outer surface of the second short section (4). The outer surface of the movable sleeve (8) near the connecting ring (7) is fixedly connected with a snap ring (9). The snap ring (9) is rotated and sleeved inside the connecting ring (7).

2. The oil pipe drag-reducing short section structure according to claim 1, characterized in that: Two docking rings (16) are provided between the first short section (3) and the second short section (4). The opposing surfaces of the two docking rings (16) are sealed and fitted together. A fixing ring (15) is fixedly connected to the back side of each of the two docking rings (16). The other ends of the two fixing rings (15) are fixedly connected to the first short section (3) and the second short section (4) respectively.

3. The oil pipe drag-reducing short section structure according to claim 2, characterized in that: The inner diameter of the fixing ring (15), the docking ring (16), the first short section (3), and the second short section (4) is the same, and the fixing ring (15) is smoothly connected to the inner wall of the first short section (3) and the second short section (4).

4. The oil pipe drag-reducing short section structure according to claim 1, characterized in that: The movable sleeve (8) is fixedly fitted with a reinforcing ring (10), and a number of balls (11) are embedded on the outside of the reinforcing ring (10).

5. The oil pipe drag-reducing short section structure according to claim 1, characterized in that: The outer surface of the first short section (3) is provided with a groove (12) located below the rocker arm (5). A slider (13) is slidably engaged inside the groove (12). A rotating shaft (14) is rotatably sleeved inside the slider (13). One end of the rotating shaft (14) passes through the slider (13) and extends to the outside of the groove (12) and is fixedly connected to one end of the rocker arm (5).

6. The oil pipe drag-reducing short section structure according to claim 2, characterized in that: Both of the two mating rings (16) are provided with external threads, and the external threads of the two mating rings (16) rotate in opposite directions.

7. The oil pipe drag-reducing short section structure according to claim 2, characterized in that: A linkage sleeve (17) is provided between the two docking rings (16). An anti-slip strip (18) is fixedly connected to the outer surface of the linkage sleeve (17). The two ends of the linkage sleeve (17) are threaded onto the outer surface of the two docking rings (16). The length of the linkage sleeve (17) is smaller than the overall length of the two fixed rings (15) and the docking rings (16).

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