Opposite locking type oil-gas well oil casing threaded connection structure

Abstract

The utility model discloses a counter-locking type oil-gas well oil casing threaded connection structure, which relates to the technical field of oil-gas well exploitation, and has the technical key points that the counter-locking type oil-gas well oil casing threaded connection structure comprises a casing, a locking mechanism is arranged outside the casing, the locking mechanism comprises an extrusion assembly and a clamping assembly, and the extrusion assembly comprises two support frames fixedly arranged on the outer wall of the casing; extrusion bolts are rotatably installed on the upper end faces of the two supporting frames through threads, connecting blocks are fixedly installed at the ends of the two extrusion bolts, extrusion plates are rotatably installed on the bottom walls of the two connecting blocks, extrusion pads are fixedly installed on the inner walls of the two extrusion plates, and extrusion openings matched with the two extrusion plates are formed in the outer wall of the sleeve. Under extrusion of the extrusion assembly, the external threads on the outer wall of the oil pipe can be extruded and locked, so that the fixing effect of connection between the internal threads of the sleeve and the external threads of the oil pipe can be improved, under clamping and fixing of the clamping assembly, the oil pipe can be prevented from rotating due to external force, and therefore the reliability of connection between the oil pipe and the sleeve can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas well development technology, specifically to a lock-type oil and gas well casing threaded connection structure. Background Technology

[0002] Oil and gas well extraction refers to the process of extracting fossil fuels such as oil and natural gas from underground storage. Oil and natural gas are stored in oil and gas reservoirs and are extracted through steps such as exploration, drilling, and extraction.

[0003] Oil casing is an essential type of pipe for oil extraction. Its main function is to fix the well wall and form an oil and gas channel. Each oil casing is connected sequentially by a threaded joint. In the existing technology, the threads between the traditional pipe and the connector do not have a limiting device, which can lead to loosening of the pipe and connector. The pipe is also prone to rotation under external force, which affects the reliability of the connection between the tubing and the casing. This can easily lead to oil and gas leakage accidents during the extraction process and result in insufficient safety. Therefore, it is necessary to redesign a lockable threaded connection structure for oil and gas well casing to address the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a locking type oil and gas well casing threaded connection structure, which solves the problem that the traditional thread between the pipe and the connector lacks a limiting device, which can lead to loosening of the pipe and connector and easy rotation of the pipe under external force.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a locking type oil and gas well casing threaded connection structure, including a casing, wherein a locking mechanism is provided on the outside of the casing;

[0008] The locking mechanism includes a compression component and a clamping component.

[0009] Preferably, the extrusion assembly includes two support frames fixedly installed on the outer wall of the sleeve. Extrusion bolts are rotatably installed on the upper surfaces of the two support frames via threads. Connecting blocks are fixedly installed at the ends of the two extrusion bolts. Extrusion plates are rotatably installed on the bottom walls of the two connecting blocks. Extrusion pads are fixedly installed on the inner walls of the two extrusion plates. An extrusion opening that cooperates with the two extrusion plates is provided on the outer wall of the sleeve.

[0010] Preferably, the clamping assembly includes multiple support plates fixedly installed on the outer wall of the sleeve, a connecting sleeve fixedly installed on the inner wall of each support plate, a hydraulic rod slidably installed inside each connecting sleeve, and a clamping block fixedly installed at the telescopic end of each hydraulic rod.

[0011] Preferably, two stabilizing rods are fixedly installed on the outer walls of both extrusion plates, and the two stabilizing rods on the same side slide through the support frame on the same side. Locking nuts are rotatably installed on the outer walls of both extrusion bolts.

[0012] Preferably, each clamping block has a clamping plate fixedly installed on its inner wall, and each clamping plate has an arc-shaped inner wall.

[0013] Preferably, each clamping plate has multiple anti-slip toothed strips fixedly installed on its inner wall, and each anti-slip toothed strip and the two extrusion pads are made of vulcanized rubber.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a method with the following beneficial effects:

[0016] This utility model, by setting a locking mechanism, includes a compression component and a clamping component. Under the compression of the compression component, the external thread of the outer wall of the tubing can be compressed and locked, thereby increasing the fixing effect of the connection between the inner thread of the casing and the outer thread of the tubing. Under the clamping and fixing of the clamping component, the tubing can be prevented from rotating due to external force, thereby ensuring the reliability of the connection between the tubing and the casing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a locking type oil well casing threaded connection structure proposed in this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the vertical section structure;

[0019] Figure 3 This is a top view schematic diagram of a lock-type oil well casing threaded connection structure proposed in this utility model;

[0020] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point A in the diagram.

[0021] In the picture:

[0022] 1. Sleeve;

[0023] 2. Locking mechanism; 21. Compression assembly; 22. Clamping assembly;

[0024] 211. Support frame; 212. Extrusion bolt; 213. Connecting block; 214. Extrusion plate; 215. Extrusion pad;

[0025] 221. Support plate; 222. Connecting sleeve; 223. Hydraulic rod; 224. Clamping block;

[0026] 3. Stabilizer bar;

[0027] 4. Tighten the nut;

[0028] 5. Clamping plate;

[0029] 6. Anti-slip toothed rack. Detailed Implementation

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] This utility model provides a technical solution:

[0032] Please see Figures 1-4 A locking type oil and gas well casing threaded connection structure includes a casing 1, and a locking mechanism 2 is provided on the outside of the casing 1;

[0033] The locking mechanism 2 includes a compression component 21 and a clamping component 22.

[0034] Furthermore, the extrusion assembly 21 includes two support frames 211 fixedly installed on the outer wall of the sleeve 1. Extrusion bolts 212 are rotatably installed on the upper surface of the two support frames 211 via threads. Connecting blocks 213 are fixedly installed at the ends of the two extrusion bolts 212. Extrusion plates 214 are rotatably installed on the bottom walls of the two connecting blocks 213. Extrusion pads 215 are fixedly installed on the inner walls of the two extrusion plates 214. An extrusion opening that mates with the two extrusion plates 214 is provided on the outer wall of the sleeve 1.

[0035] Furthermore, the clamping assembly 22 includes multiple support plates 221 fixedly installed on the outer wall of the sleeve 1. Each support plate 221 has a connecting sleeve 222 fixedly installed on its inner wall. Each connecting sleeve 222 has a hydraulic rod 223 slidably installed inside it. Each hydraulic rod 223 has a clamping block 224 fixedly installed at its telescopic end.

[0036] Furthermore, two stabilizing rods 3 are fixedly installed on the outer walls of both extrusion plates 214, and the two stabilizing rods 3 on the same side slide through the support frame 211 on the same side. Locking nuts 4 are rotatably installed on the outer walls of both extrusion bolts 212.

[0037] Furthermore, each clamping block 224 has a clamping plate 5 fixedly installed on its inner wall. Each clamping plate 5 has an arc-shaped inner wall. The clamping plate 5 with the arc-shaped inner wall can better contact and fit with the oil pipe on the arc-shaped outer wall, thereby increasing the clamping firmness.

[0038] Furthermore, multiple anti-slip toothed strips 6 are fixedly installed on the inner wall of each clamping plate 5. Each anti-slip toothed strip 6 and the two extrusion pads 215 are made of vulcanized rubber. After vulcanization, the molecular structure of the vulcanized rubber changes from a linear polymer to a network structure. This structural change significantly affects the physical and chemical properties of the rubber, thereby increasing the friction.

[0039] In practical use, the working principle of this utility model is as follows:

[0040] The casing 1 can be rotatably connected to the outer walls of the two oil pipes through the engagement of internal and external threads. It can also be fixedly connected to the outer walls of the two oil pipes through the engagement of internal and external threads. After the casing 1 is connected to the two oil pipes, the two clamping bolts 212 can be turned in sequence. When the clamping bolts 212 rotate, they can drive the clamping plate 214 to move through the engagement of the connecting block 213. At this time, the clamping plate 214 can drive the two stabilizing rods 3 to slide on the inner wall of the support frame 211, causing the clamping plate 214 to move vertically downwards. The continuous movement of 4 can drive the extrusion pad 215 to move into the extrusion opening. At this time, the extrusion pad 215 can squeeze and fit the external thread of the oil pipe, thereby enabling the extrusion pad 215 to squeeze and lock the external thread of the outer wall of the oil pipe, and the connection between the inner wall of the sleeve 1 and the outer wall of the oil pipe will loosen. Then, the locking nut 4 can be turned so that its upper end face contacts the bottom wall of the support frame 211 and squeezes, thereby locking the extrusion bolt 212, thus preventing it from loosening due to vibration and preventing the extrusion plate 214 from moving upward.

[0041] Meanwhile, multiple hydraulic rods 223 can be placed into the corresponding connecting sleeves 222, thereby enabling the convenient installation of multiple clamping blocks 224. Subsequently, the hydraulic pump can be connected to the hydraulic rods 223. Under the pressure of hydraulic oil, the telescopic end of the hydraulic rods 223 can drive the clamping blocks 224 to move outward. At this time, the clamping blocks 224 can drive the clamping plates 225 and the anti-slip rack 6 to come into contact with the outer wall of the oil pipe. The two opposing clamping plates 225 can clamp the outer wall of the oil pipe on the same side. Through the cooperation of the anti-slip rack 6, the oil pipe can be prevented from rotating due to external force, thereby ensuring the reliability of the connection between the oil pipe and the sleeve 1.

[0042] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A lock-type oil and gas well casing threaded connection structure, comprising a casing (1), characterized in that, The sleeve (1) is provided with a locking mechanism (2) on the outside; The locking mechanism (2) includes a pressing assembly (21) and a clamping assembly (22). The pressing assembly (21) includes two support frames (211) fixedly installed on the outer wall of the sleeve (1). The upper surfaces of the two support frames (211) are each threadedly mounted with a pressing bolt (212). The ends of the two pressing bolts (212) are each fixedly mounted with a connecting block (213). The bottom walls of the two connecting blocks (213) are each rotatably mounted with a pressing plate (214). The two pressing plates (214) The inner wall is fixedly installed with a compression pad (215). The outer wall of the sleeve (1) is provided with a compression opening that cooperates with two compression plates (214). The clamping assembly (22) includes multiple support plates (221) fixedly installed on the outer wall of the sleeve (1). Each support plate (221) is fixedly installed with a connecting sleeve (222) on its inner wall. Each connecting sleeve (222) is slidably installed with a hydraulic rod (223) inside. Each hydraulic rod (223) is fixedly installed with a clamping block (224) at its telescopic end.

2. The interlocking oil and gas well casing threaded connection structure according to claim 1, characterized in that, Two stabilizing rods (3) are fixedly installed on the outer walls of the two extrusion plates (214). The two stabilizing rods (3) on the same side slide through the support frame (211) on the same side. Locking nuts (4) are rotatably installed on the outer walls of the two extrusion bolts (212).

3. The threaded connection structure for a lock-type oil and gas well casing as described in claim 2, characterized in that, Each clamping block (224) has a clamping plate (5) fixedly installed on its inner wall, and each clamping plate (5) has an arc-shaped inner wall.

4. The lock-type oil and gas well casing threaded connection structure according to claim 3, characterized in that, Each clamping plate (5) has multiple anti-slip toothed strips (6) fixedly installed on its inner wall. Each anti-slip toothed strip (6) and the two extrusion pads (215) are made of vulcanized rubber.

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