Oil pipe convenient to connect

Abstract

The utility model relates to an oil pipe convenient to connect, which belongs to the technical field of oil pipes for oil fields and comprises a first oil pipe and a second oil pipe, a connecting sleeve is rotatably mounted on the surface of the first oil pipe and is in threaded connection with the second oil pipe, and a limiting groove is formed in one end of the connecting sleeve. And a fixed ring plate is fixedly mounted on the surface of the second oil pipe. According to the oil pipe convenient to connect, a limiting groove is formed in one end of a connecting sleeve, a fixing ring plate is arranged on the surface of a second oil pipe, a limiting rod is arranged on one side of the fixing ring plate in a penetrating mode, and after the first oil pipe and the second oil pipe are in butt joint through the connecting sleeve, the limiting rod is inserted into the limiting groove; the connecting sleeve and the second oil pipe are prevented from generating large-amplitude relative rotation in the vibration process, so that the first oil pipe and the second oil pipe are tightly connected, and the problems that the two oil pipes are in threaded connection, vibration is easily generated in the use process, connection is loosened, and connection is not tight enough are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipes for oil fields, in particular to an oil pipe that is easy to connect. Background Art

[0002] Oilfield tubing, also known as specialized oil pipe or oil well tubing, is a key piece of equipment used in the oil industry for drilling, extraction, and transportation of oil and gas. Tubing is primarily used to transport oil and gas from the bottom of the well to the surface. Casing supports the wellbore of oil and gas wells, ensuring the proper operation of the entire well during drilling and after completion. Depending on its use, casing can be categorized as guide tube, surface casing, technical casing, and reservoir casing. Tubing and casing consist of an inner and outer layer, both unthreaded and without couplings. The inner pipe has thickened ends, while the outer pipe has plain ends. To accommodate varying geological conditions and operational requirements, strict regulations exist regarding the dimensions, steel grades, and end finishes of tubing and casing.

[0003] During the process of crude oil exploration and production, oil pipelines play the role of transporting crude oil from underground wells to the ground and withstand the pressure generated during the production process. At the crude oil production site, due to the different depths of oil wells, oil pipeline connection technology is used to graft and extend the oil pipelines.

[0004] The utility model patent with the announcement number CN208416457U discloses an oil pipe for oil fields that is easy to connect. A driving sleeve is movably sleeved on the outside of the oil pipe body I, and a fixed sleeve is fixedly sleeved on the outside of the oil pipe body II, so that the inside of the driving sleeve is threadedly connected to the outside of the fixed sleeve. After the position of the oil pipe body I is fixed, the driving sleeve is rotated, so that the fixed sleeve and the oil pipe body II move along the length direction of the internal and external threads, thereby realizing the connection between the oil pipe body I and the oil pipe body II without having to rotate the oil pipe body I or the oil pipe body II to achieve the threaded connection, thereby simplifying the oil pipe connection operation at the oil production site.

[0005] However, in this structure, the drive sleeve and the oil pipe body II are connected by threads, which is prone to vibration during use, resulting in relative movement between the drive sleeve and the oil pipe body II, causing the connection to loosen, making the connection not tight enough. In view of this, the present application proposes an oil pipe that is easy to connect. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the utility model provides an oil pipe that is easy to connect and has the advantages of preventing the connection from loosening during vibration. It solves the problem that the threaded connection between two oil pipes is prone to vibration during use, causing the connection to loosen and the connection to be not tight enough.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an oil pipe that is easy to connect, comprising a first oil pipe and a second oil pipe, a connecting sleeve being rotatably installed on the surface of the first oil pipe, the connecting sleeve being threadedly connected to the second oil pipe, a limiting groove being provided at one end of the connecting sleeve, a fixing ring plate being fixedly installed on the surface of the second oil pipe, a limiting rod being passed through one side of the fixing ring plate, and the limiting rod being adapted to the limiting groove.

[0008] Furthermore, a movable ring plate is slidably mounted on the surface of the second oil pipe, and one end of the limiting rod is fixedly connected to the movable ring plate.

[0009] Furthermore, a return spring is sleeved on the surface of the limit rod, one end of the return spring is fixedly connected to one side of the fixed ring plate, and the other end of the return spring is fixedly connected to one side of the movable ring plate.

[0010] Furthermore, the number of the limiting grooves is eight, and the eight limiting grooves are all distributed at one end of the connecting sleeve. The limiting grooves are arc-shaped grooves, the length of the limiting grooves is greater than the diameter of the limiting rod, and the width of the limiting grooves is equal to the diameter of the limiting rod.

[0011] Furthermore, a sealing tube is fixedly installed at one end of the second oil pipe, and a sealing groove adapted to the sealing tube is opened at one end of the first oil pipe.

[0012] Furthermore, a rotation groove is provided on the surface of the first oil pipe, and a limit ring is fixedly installed on the inner side wall of the connecting sleeve, and the limit ring is located inside the rotation groove.

[0013] Furthermore, a control nut is fixedly mounted on the surface of the connecting sleeve, four inner sealing rings are fixedly mounted on the inner side wall of the sealing tube, and four outer sealing rings are fixedly mounted on the surface of the sealing tube.

[0014] Compared with the prior art, the present invention provides an oil pipe that is easy to connect and has the following beneficial effects:

[0015] The oil pipe which is easy to connect is provided with a limit groove at one end of the connecting sleeve, a fixing ring plate is provided on the surface of the second oil pipe, and a limit rod is passed through one side of the fixing ring plate. After the first oil pipe and the second oil pipe are connected to each other through the connecting sleeve, the limit rod is inserted into the limit groove to prevent the connecting sleeve and the second oil pipe from generating a large range of relative rotation during vibration, so that the connection between the first oil pipe and the second oil pipe remains tight, and solves the problem that the threaded connection between the two oil pipes is prone to vibration during use, resulting in loose connection and insufficient connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a side view of the first oil pipe of the utility model;

[0018] Figure 3 This is a side view of the second oil pipe of the utility model;

[0019] Figure 4 This is a three-dimensional diagram of the first oil pipe and connecting sleeve of the utility model.

[0020] In the figure: 1. First oil pipe; 2. Second oil pipe; 3. Connecting sleeve; 4. Limiting groove; 5. Fixed ring plate; 6. Limiting rod; 7. Movable ring plate; 8. Return spring; 9. Sealing tube; 10. Sealing groove; 11. Rotating groove; 12. Limiting ring; 13. Control nut; 14. Inner sealing ring; 15. Outer sealing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 4 A conveniently connected oil pipe comprises a first oil pipe 1 and a second oil pipe 2. A connecting sleeve 3 is rotatably mounted on the surface of the first oil pipe 1. The connecting sleeve 3 is threadedly connected to the second oil pipe 2. A limiting groove 4 is provided at one end of the connecting sleeve 3. A fixing ring plate 5 is fixedly mounted on the surface of the second oil pipe 2. A limiting rod 6 is passed through one side of the fixing ring plate 5. The limiting rod 6 is adapted to the limiting groove 4. The connecting sleeve 3 is threadedly connected to the second oil pipe 2 to achieve docking between the first oil pipe 1 and the second oil pipe 2. After docking, the limiting rod 6 is inserted into the limiting groove 4 through the fixing ring plate 5. Under the restriction of the limiting rod 6, the connecting sleeve 3 can only move slightly within the length range of the limiting groove 4, so that the connection between the first oil pipe 1 and the second oil pipe 2 will not be affected by vibration.

[0023] At the same time, a movable ring plate 7 is slidably mounted on the surface of the second oil pipe 2 , and one end of the limiting rod 6 is fixedly connected to the movable ring plate 7 .

[0024] The surface of the limiting rod 6 is covered with a return spring 8, one end of which is fixedly connected to one side of the fixed ring plate 5, and the other end of which is fixedly connected to one side of the movable ring plate 7. The movable ring plate 7 controls the synchronous movement of the eight limiting rods 6, and the return spring 8 pulls the movable ring plate 7 to insert the limiting rods 6 into the limiting slots 4.

[0025] Secondly, there are eight limiting grooves 4, which are evenly distributed at one end of the connecting sleeve 3. The limiting grooves 4 are arc-shaped grooves. The length of the limiting grooves 4 is greater than the diameter of the limiting rod 6, and the width of the limiting grooves 4 is equal to the diameter of the limiting rod 6.

[0026] At the same time, a sealing tube 9 is fixedly installed at one end of the second oil pipe 2, and a sealing groove 10 adapted to the sealing tube 9 is opened at one end of the first oil pipe 1. The sealing tube 9 is inserted into the sealing groove 10, so that the first oil pipe 1 and the second oil pipe 2 are sealed.

[0027] A rotation groove 11 is defined on the surface of the first oil pipe 1, and a limit ring 12 is fixedly mounted on the inner sidewall of the connecting sleeve 3. The limit ring 12 is located within the rotation groove 11. The connecting sleeve 3 rotates on the surface of the first oil pipe 1 under the action of the limit ring 12 while being stuck in the rotation groove 11, preventing the connecting sleeve 3 from separating from the first oil pipe 1.

[0028] Example 2: Please refer to Figures 1 to 4 Based on the first embodiment, a control nut 13 is fixedly mounted on the surface of the connecting sleeve 3, four inner sealing rings 14 are fixedly mounted on the inner sidewall of the sealing tube 9, and four outer sealing rings 15 are fixedly mounted on the surface of the sealing tube 9. The inner sealing rings 14 and outer sealing rings 15 form a multi-layer seal, improving the sealing effect between the sealing tube 9 and the sealing groove 10.

[0029] When this embodiment is in use, the first oil pipe 1 and the second oil pipe 2 are threadedly connected through the connecting sleeve 3, so that the first oil pipe 1 and the second oil pipe 2 are docked. During docking, the movable ring plate 7 is pulled to the right to make the limit rod 6 move away from the connecting sleeve 3. After the docking is completed, the movable ring plate 7 is loosened. Under the action of the reset spring 8, the limit rod 6 passes through the fixed ring plate 5 and is inserted into the limit groove 4. Under the restriction of the limit rod 6, the connecting sleeve 3 can only move slightly within the length range of the limit groove 4, so that the connection of the first oil pipe 1 and the second oil pipe 2 will not be affected by vibration.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0031] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil pipe that is easy to connect, comprising a first oil pipe (1) and a second oil pipe (2), characterized in that: A connecting sleeve (3) is rotatably mounted on the surface of the first oil pipe (1), and the connecting sleeve (3) is threadedly connected to the second oil pipe (2). A limiting groove (4) is provided at one end of the connecting sleeve (3). A fixing ring plate (5) is fixedly mounted on the surface of the second oil pipe (2), and a limiting rod (6) is passed through one side of the fixing ring plate (5), and the limiting rod (6) is adapted to the limiting groove (4).

2. The oil pipe that is easy to connect according to claim 1, characterized in that: A movable ring plate (7) is slidably mounted on the surface of the second oil pipe (2), and one end of the limiting rod (6) is fixedly connected to the movable ring plate (7).

3. The oil pipe that is easy to connect according to claim 2, characterized in that: A reset spring (8) is sleeved on the surface of the limiting rod (6), one end of the reset spring (8) is fixedly connected to one side of the fixed ring plate (5), and the other end of the reset spring (8) is fixedly connected to one side of the movable ring plate (7).

4. The oil pipe that is easy to connect according to claim 1, characterized in that: The number of the limiting grooves (4) is eight, and the eight limiting grooves (4) are evenly distributed at one end of the connecting sleeve (3). The limiting grooves (4) are arc-shaped grooves, the length of the limiting grooves (4) is greater than the diameter of the limiting rod (6), and the width of the limiting grooves (4) is equal to the diameter of the limiting rod (6).

5. The oil pipe that is easy to connect according to claim 1, characterized in that: A sealing tube (9) is fixedly mounted on one end of the second oil pipe (2), and a sealing groove (10) adapted to the sealing tube (9) is provided on one end of the first oil pipe (1).

6. The oil pipe that is easy to connect according to claim 1, characterized in that: A rotation groove (11) is provided on the surface of the first oil pipe (1), and a limiting ring (12) is fixedly installed on the inner side wall of the connecting sleeve (3), and the limiting ring (12) is located inside the rotation groove (11).

7. The oil pipe that is easy to connect according to claim 5, characterized in that: A control nut (13) is fixedly mounted on the surface of the connecting sleeve (3), four inner sealing rings (14) are fixedly mounted on the inner side wall of the sealing tube (9), and four outer sealing rings (15) are fixedly mounted on the surface of the sealing tube (9).

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