Oil well pipe screwed joint screwing test device

Abstract

The utility model discloses an oil well pipe screwed joint screwing test device, and relates to the technical field of oil exploitation. The device comprises a [-shaped plate, wherein an elliptical channel is formed at the bottom of the [-shaped plate; the limiting mechanisms are arranged on the upper side and the lower side of the inner wall of the [-shaped plate, the limiting mechanisms are used for limiting the upper connecting end and the lower connecting end of the oil well pipe, each limiting mechanism comprises a guide rod fixedly arranged between the inner side walls of the [-shaped plate at intervals, the two sides of the surface of each guide rod are slidably sleeved with clamping blocks, and V-shaped grooves are formed in the opposite sides of the two clamping blocks; and one side of the C-shaped plate is in threaded connection with an adjusting rod. According to the device, the movement of the oil well pipe connecting end is limited by arranging the limiting mechanism, and the eccentric state of the oil well pipe connecting end can be changed by changing the position of the clamping block through the adjusting rod, so that the eccentric condition possibly occurring in the actual operation can be simulated, and the performance of the screwed joint under the actual working condition can be truly reflected.

Description

Technical Field

[0001] The utility model relates to the technical field of oil extraction equipment, and particularly relates to a screwing test device for oil well pipe thread joints. Background Art

[0002] During the oil extraction process, the connection of oil well pipes usually adopts the thread joint method. Due to the long length of the oil well pipes during operation on the derrick and the limitations of the actual operation environment, problems such as insufficient straightness of the pipes, deviation between the pipes and the wellhead center, and shaking during the rotation process often occur. These factors cause it difficult for the center line of the pipe to be consistent with the wellhead center line during the actual screwing process, resulting in an eccentric phenomenon. This eccentricity causes the self-weight of the pipe to form an additional eccentric moment on the thread, increasing the additional load on the thread connection part. This not only damages the thread surface but may also affect the sealing performance and stability of the entire joint.

[0003] In the prior art, the design of the test device for oil well pipe thread joints often ignores the above-mentioned eccentric problems that occur during on-site operations. When the traditional test device conducts performance tests on thread joints, it generally only performs axial and radial loading tests on the thread joints and cannot simulate the dynamic load changes caused by eccentricity during actual operations. This leads to a difference between the test conditions and the actual use conditions, making it difficult for the test results to truly reflect the performance of the thread joints under actual working conditions. Therefore, we propose an oil well pipe thread joint screwing test device to solve the above problems. Summary of the Utility Model

[0004] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0005] An oil well pipe thread joint screwing test device includes:

[0006] An inverted U-shaped plate, the bottom of the inverted U-shaped plate is provided with an elliptical channel;

[0007] A limiting mechanism, arranged on the upper and lower sides of the inner wall of the inverted U-shaped plate, the limiting mechanism is used to limit the upper and lower connection ends of the oil well pipe. The limiting mechanism includes guiding rods fixedly arranged at intervals between the inner side walls of the inverted U-shaped plate. Sliding sleeves are arranged on both sides of the surface of the guiding rods with clamping blocks. V-shaped grooves are formed on the opposite sides of the two clamping blocks. One side of the inverted U-shaped plate is threadedly connected with an adjusting rod. The end of the adjusting rod located inside the inverted U-shaped plate is rotationally connected to the back of the clamping block through a bearing. A spring is connected between the back of the other clamping block and the inner side wall of the inverted U-shaped plate. The spring is sleeved on the surface of the guiding rod.

[0008] Furthermore, the adjusting rods of the upper and lower limiting mechanisms are on different sides of the inverted U-shaped plate.

[0009] Further, a fixing plate is connected to the rear side of the C-shaped plate corresponding to the position of the clamping block, and scale lines are marked on the edge of the fixing plate.

[0010] Further, a buffer pad is arranged inside the V-shaped groove, and the buffer pad is an elastic rubber pad.

[0011] Further, counterweight seats are fixedly arranged at the bottom of both sides of the C-shaped plate, and the counterweight seats are trapezoidal.

[0012] Further, the counterweight seat is a hollow cavity, and the side away from the C-shaped plate is an open structure.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model fixes and positions the connection end of the oil well pipe by setting a limiting mechanism, ensuring that the position of the oil well pipe is controllable and stable during the test. During the test, by rotating the adjusting rod, the position of the clamping block on the guiding rod can be changed, and the offset (eccentric distance) of the connection end of the oil well pipe can be adjusted to simulate the eccentric situation that may occur in actual operations, so as to truly reflect the performance of the threaded joint under actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is another three-dimensional structural schematic diagram of the present utility model.

[0017] Reference numerals: 1, C-shaped plate; 101, elliptical channel; 2, limiting mechanism; 201, guiding rod; 202, clamping block; 2021, V-shaped groove; 203, adjusting rod; 204, spring; 205, buffer pad; 3, fixing plate; 301, scale line; 4, counterweight seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0019] This application provides a testing device for screwing and connecting threaded joints of oil well pipes, mainly used to solve the problem that in the prior art, during the performance testing of threaded joints by traditional testing devices, generally only axial and radial loading tests are performed on the threaded joints, and the dynamic load changes caused by eccentricity in actual operations cannot be simulated, resulting in a difference between the test conditions and the actual use conditions, making it difficult for the test results to truly reflect the performance of the threaded joint under actual working conditions. The following technical solutions are provided and will be described in detail below in combination with Figure 1-Figure 2 for a detailed description:

[0020] A screwing test device for an oil well pipe thread joint, comprising:

[0021] An L-shaped plate 1, the bottom of the L-shaped plate 1 is configured with an elliptical channel 101;

[0022] A limiting mechanism 2, arranged on the upper and lower sides of the inner wall of the L-shaped plate 1, the limiting mechanism 2 is used to limit the upper and lower connecting ends of the oil well pipe, the limiting mechanism 2 includes guide rods 201 fixedly arranged at intervals between the inner side walls of the L-shaped plate 1, clamping blocks 202 are slidably sleeved on both sides of the surface of the guide rods 201, a V-shaped groove 2021 is configured on one side of the two clamping blocks 202 facing each other, one side of the L-shaped plate 1 is threadedly connected with an adjusting rod 203, the end of the adjusting rod 203 located inside the L-shaped plate 1 is rotatably connected to the back of the clamping block 202 through a bearing, and a spring 204 is connected between the back of the other clamping block 202 and the inner side wall of the L-shaped plate 1, and the spring 204 is sleeved on the surface of the guide rod 201.

[0023] The specific implementation process and principle description of this screwing test device for an oil well pipe thread joint:

[0024] First step, put the two connecting ends of the oil well pipe to be tested into the V-shaped grooves 2021 of the clamping blocks 202 of the upper and lower limiting mechanisms 2 respectively;

[0025] Second step, according to the eccentric state in actual operation, by rotating the adjusting rod 203, adjust the position of the clamping block 202 to realize the eccentric simulation of the connecting end of the oil well pipe. During the process of rotating the adjusting rod 203, the spring 204 cooperates with the clamping block 202 to clamp the two connecting ends of the oil well pipe to ensure that it will not break away from the L-shaped plate 1;

[0026] Third step, conduct performance tests on the thread joint, including axial and radial loading, etc.

[0027] As Figure 1 shown, in some embodiments, the adjusting rods 203 of the upper and lower limiting mechanisms 2 are on different sides of the L-shaped plate 1. More specifically, through the adjusting rods 203 located on different sides, independent eccentric adjustment can be performed on the upper and lower connecting ends of the oil well pipe thread joint. This design can achieve finer adjustment because the eccentricity of each connecting end can be controlled separately, so as to more accurately simulate the eccentric situation under actual working conditions. In addition, since the adjusting rods 203 are on different sides, they can work together to provide a more uniform and stable clamping force. This design helps to prevent the oil well pipe from loosening when subjected to axial and radial loads, ensuring the stability and safety of the oil well pipe during the test process.

[0028] As Figure 1As shown, in some embodiments, a fixing plate 3 is connected to the rear side of the C-shaped plate 1 corresponding to the position of the clamping block 202. Scale lines 301 are marked on the edge of the fixing plate 3. More specifically, as an accurate reference, the operator can easily determine the position of the clamping block 202 by observing the scale lines 301 on the fixing plate 3, thereby controlling the eccentricity of the connecting end of the oil well pipe. At the same time, fine-tuning can be performed according to experimental requirements, improving the convenience of operation. The scale lines 301 provide intuitive visual feedback, and the operator can reduce the positioning error caused by manual adjustment, thereby improving the overall accuracy of the experiment.

[0029] As Figure 1 shown, in some embodiments, a buffer pad 205 is arranged inside the V-shaped groove 2021. The buffer pad 205 is an elastic rubber pad. More specifically, on the one hand, due to the softness of the elastic rubber pad, the buffer pad 205 can adapt to the minute dimensional changes of the threaded joint, maintaining the stability of clamping, contributing to maintaining the accuracy of the test. At the same time, it can effectively reduce the wear of the connecting end of the oil well pipe during the screwing process. In addition, when simulating the dynamic load changes in actual operations, the buffer pad 205 can provide sufficient damping to reduce the loosening of the threaded joint caused by vibration or other external forces.

[0030] As Figure 1 shown, in some embodiments, the counterweight seat 4 is a hollow cavity, and the side away from the C-shaped plate 1 is an open structure. More specifically, by filling heavy objects in the counterweight seat 4, the overall weight of the device can be increased according to needs, thereby enhancing the stability of the device. In addition, when the entire device needs to be moved, the filling in the counterweight seat 4 can be taken out to reduce the overall weight of the device, making the handling process easier and safer.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screw connection test device for oil well pipe threaded joints, characterized in that: Including: A U-shaped plate (1), the bottom of the U-shaped plate (1) is configured with an elliptical channel (101); A limiting mechanism (2), arranged on the upper and lower sides of the inner wall of the U-shaped plate (1), the limiting mechanism (2) is used to limit the upper and lower connecting ends of the oil well pipe, the limiting mechanism (2) includes guide rods (201) fixedly arranged at intervals between the inner side walls of the U-shaped plate (1), clamping blocks (202) are slidably sleeved on both sides of the surface of the guide rods (201), V-shaped grooves (2021) are configured on the opposite sides of the two clamping blocks (202), one side of the U-shaped plate (1) is threadedly connected with an adjusting rod (203), the end of the adjusting rod (203) located inside the U-shaped plate (1) is rotatably connected to the back surface of the clamping block (202) through a bearing, and a spring (204) is connected between the back surface of the other clamping block (202) and the inner side wall of the U-shaped plate (1), and the spring (204) is sleeved on the surface of the guide rod (201).

2. The oil well pipe threaded joint screwing test device according to claim 1, characterized in that: The adjusting rods (203) of the upper and lower limiting mechanisms (2) are on different sides of the U-shaped plate (1).

3. The oil well pipe threaded joint screwing test device according to claim 1, characterized in that: A fixing plate (3) is connected to the rear side of the U-shaped plate (1) corresponding to the position of the clamping block (202), and scale lines (301) are marked on the edge of the fixing plate (3).

4. The oil well pipe threaded joint screwing test device according to claim 1, characterized in that: A buffer pad (205) is arranged inside the V-shaped groove (2021), and the buffer pad (205) is an elastic rubber pad.

5. The oil well pipe threaded joint screwing test device according to claim 1, characterized in that: Counterweight seats (4) are fixedly arranged at the bottoms of both sides of the U-shaped plate (1), and the counterweight seats (4) are trapezoidal.

6. The oil well pipe threaded joint screwing test device according to claim 5, characterized in that: The counterweight seat (4) is a hollow cavity, and the side away from the U-shaped plate (1) is an open structure.

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