Oil pipe screw thread protection device

Abstract

The invention belongs to the technical field of oil extraction and gas extraction oil well operation, particularly relates to an oil pipe screw thread protection device, and aims to solve the problem that a pulley overturns and falls off from a slide way. The device comprises a plurality of supporting columns, a guide rail fixedly connected to the top ends of the supporting columns and a pulley installed on the guide rail. The guide rail is I-shaped, and grooves are formed in the two sides of the guide rail; the tackle is a U-shaped block and is buckled on the guide rail, the inner side of the tackle is attached to the side face of the guide rail, a sliding block is fixedly connected to the inner side of the tackle, and when the tackle is buckled on the guide rail, the sliding block is embedded into a groove of the guide rail. During oil well operation, the oil pipe screw thread can be effectively protected, the construction speed can be increased, the labor intensity of workers is reduced, and the timeliness continuity is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas well operation, and particularly relates to a tubing thread protection device. BACKGROUND

[0002] The pipe string operation is one of the most common and important work links in the downhole minor repair operation of an oil well. There are two methods for protecting the thread when the pipe string is lifted or lowered. One is to install a thread protector on the pin thread, and the other is to use a small trolley. The commonly used method is to use a tubing slide and a small trolley, and the part of the pin thread at the end of the pipe string is placed on the small trolley. With the lifting and lowering of the pipe string, the small trolley moves forward and backward on the slide to avoid the direct friction and sliding of the pipe string thread on the slide, so as to achieve the purpose of protecting the pin thread of the tubing.

[0003] However, the small trolley and the tubing slide are not effectively fixed, and the small trolley is prone to overturning when it slides. At the same time, the central part of the small trolley for supporting the tubing is small, and the operator is prone to deviation when placing the tubing on the small trolley and moving the tubing from the small trolley to the tubing bridge seat. The trolley is also prone to falling off the slide, which not only affects the construction progress, but also easily causes injury to the operator who pulls and delivers the tubing, and the fallen tubing is easily contaminated with oil and soil, which needs to be cleaned again. Sometimes, the tubing thread is even damaged, causing economic losses. Therefore, the current tubing trolley and slide device has great disadvantages and hidden dangers in the use process, and poses a safety risk to the operator. SUMMARY

[0004] In order to solve the above-mentioned problems in the prior art, i.e., the problem of the trolley falling off the slide, the application provides a tubing thread protection device.

[0005] The application provides a tubing thread protection device, which adopts the following technical scheme:

[0006] The tubing thread protection device comprises a plurality of support columns, a guide rail fixedly connected to the top end of the support column, and a trolley installed on the guide rail.

[0007] The guide rail is in the shape of an I-beam, and has grooves on both sides.

[0008] The trolley is a U-shaped block, which is buckled on the guide rail. The inner side of the trolley is attached to the side surface of the guide rail, and a sliding block is fixedly connected to the inner side of the trolley. When the trolley is buckled on the guide rail, the sliding block is embedded in the groove of the guide rail.

[0009] By adopting the technical scheme, when the oil pipe needs to be transported, the oil pipe is placed on the trolley, the oil pipe is lowered and lifted by the traveling car of the workover rig, the trolley is controlled to advance and retreat, during the trolley advancing, the sliding block on the trolley is located in the groove of the guide rail, the inner side of the trolley is attached to the side of the guide rail, the trolley is prevented from overturning, when the trolley is buckled on the guide rail, the sliding block is embedded in the groove of the guide rail, the trolley is connected with the guide rail in cooperation, the sliding block and the groove limit the separation of the trolley and the guide rail in the longitudinal direction, the trolley can be firmly installed on the guide rail, and the trolley is prevented from falling off.

[0010] Preferably, the inner side of the trolley is further provided with a roller, and the roller is arranged at the top of the inner side of the trolley and in contact with the upper side of the guide rail.

[0011] By adopting the technical scheme, when the trolley slides on the guide rail, the sliding friction between the trolley and the guide rail is changed into the rolling friction between the roller and the guide rail, the friction between the trolley and the guide rail is reduced, and the trolley is more easily slid on the guide rail.

[0012] Preferably, two rollers are arranged on the trolley and have the same height.

[0013] By adopting the technical scheme, the two rollers serve as two fulcrums to support the trolley, and the trolley is ensured to be stable on the guide rail.

[0014] Preferably, the upper side of the trolley is fixedly connected with a rubber pad.

[0015] By adopting the technical scheme, when the oil pipe is placed on the trolley, the rubber pad is arranged under the thread of the oil pipe and buffers and protects the thread of the oil pipe.

[0016] Preferably, the rubber pad is arc-shaped and curved upward.

[0017] By adopting the technical scheme, the rubber pad can more easily support the thread of the oil pipe and prevent the thread of the oil pipe from falling from the side of the trolley.

[0018] Preferably, the two ends of the guide rail are fixedly connected with baffles.

[0019] By adopting the technical scheme, the baffles on the guide rail limit the trolley and prevent the trolley from sliding out of the ends of the guide rail.

[0020] Preferably, the guide rail is provided with two, and one trolley is arranged on each guide rail.

[0021] By adopting the technical scheme, the two trolleys are used together, and the oil pipe transportation efficiency is improved.

[0022] Preferably, the traction assembly includes two fixed pulleys and a traction ring wound around the two fixed pulleys, the two fixed pulleys are fixedly connected to the guide rails and are installed between the two guide rails;

[0023] The two fixed pulleys are transversely arranged and fixedly connected to the end portions of the guide rails.

[0024] The traction ring is sleeved on the two fixed pulleys, and the traction ring is arranged between the two guide rails, and the two sides of the traction ring are fixedly connected to the two trolleys, respectively.

[0025] By adopting the above technical scheme, when one trolley moves forward, the other trolley moves in the opposite direction, and one trolley is always kept in the working position, so that the two trolleys can cyclically transport the oil pipe through reciprocating action when transporting the oil pipe.

[0026] Preferably, the support column is a hydraulic cylinder.

[0027] By adopting the above technical scheme, the hydraulic cylinder is used for supporting, and the use height of the guide rail can be adjusted as needed while the guide rail is supported.

[0028] The beneficial effects of the present application are:

[0029] (1) When the trolley is buckled on the guide rail, the sliding block is embedded in the groove of the guide rail, so that the trolley is connected with the guide rail, and the sliding block and the groove limit the separation of the trolley and the guide rail in the longitudinal direction, so that the trolley can be firmly installed on the guide rail, thereby preventing the trolley from falling off;

[0030] (2) By setting the traction assembly, when one trolley moves forward, the other trolley moves in the opposite direction, so that the two trolleys can cyclically transport the oil pipe through reciprocating action when transporting the oil pipe;

[0031] (3) The support column is selected as a hydraulic cylinder, and the use height of the guide rail can be adjusted as needed while the guide rail is supported. BRIEF DESCRIPTION OF DRAWINGS

[0032] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings:

[0033] Figure 1 It is a schematic view of the oil pipe thread protection device in the embodiment;

[0034] Figure 2 It is a schematic view of the traction assembly arranged on the support column in the embodiment;

[0035] Figure 3 It is a structural schematic view of the connection between the trolley and the guide rail in the embodiment;

[0036] Figure 4 is a schematic view of the trolley in the embodiment;

[0037] Figure 5 is a schematic view of the traction assembly in the embodiment.

[0038] Explanation of reference signs: 1, support column; 2, guide rail; 21, groove; 22, baffle; 3, trolley; 31, sliding block; 32, rubber pad; 33, roller; 4, traction assembly; 41, fixed pulley; 42, traction ring. DETAILED DESCRIPTION

[0039] The application will be further described below in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0040] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and embodiments.

[0041] The present application provides an oil pipe thread protection device, referring to Figure 1 , Figure 2 , the oil pipe thread protection device comprises a support column 1, a guide rail 2, a trolley 3 and a traction assembly 4.

[0042] The support column 1 is selected as a hydraulic cylinder, which is supported by the hydraulic cylinder, and the use height can be adjusted as needed while being supported. The support column 1 is fixedly connected to the ground. A plurality of support columns 1 are provided, which jointly play a supporting role to ensure more stable support effect.

[0043] Referring to Figure 2 , Figure 3 , the guide rail 2 is provided with two guide rails 2, which are arranged in parallel, and the two guide rails 2 are fixedly connected with the top end of the support column 1, and the guide rail 2 is supported by the support column 1. The guide rail 2 is selected as an I-shaped steel, so that the guide rail 2 as a whole is in the shape of an I, and there are grooves 21 on both sides. There is a gap between the two guide rails 2. The baffle 22 is fixedly connected at both ends of the guide rail 2, and the baffle 22 is fixedly connected at the end of the two guide rails 2, and the end of the two guide rails 2 is blocked by one baffle 22.

[0044] Referring to Figure 3 , Figure 4The trolley 3 is installed on the guide rail 2 and slides along the length direction of the guide rail 2, and the baffle 22 on the guide rail 2 limits the trolley 3 to prevent the trolley 3 from sliding out of the end of the guide rail 2. The trolley 3 is a U-shaped block and is buckled on the guide rail 2. The inner side of the trolley 3 is fitted with the side of the guide rail 2, and the sliding block 31 is fixedly connected to the inner side of the trolley 3. When the trolley 3 is buckled on the guide rail 2, the sliding block 31 is embedded in the groove 21 of the guide rail 2, so that the trolley 3 is connected with the guide rail 2. The sliding block 31 and the groove 21 limit the separation of the trolley 3 and the guide rail 2 in the longitudinal direction, so that the trolley 3 can be firmly installed on the guide rail 2, thereby preventing the trolley 3 from falling off. Each guide rail 2 is provided with one trolley 3.

[0045] The rubber pad 32 is fixedly connected to the upper side of the trolley 3. When the oil pipe is placed on the trolley 3, the rubber pad 32 is placed under the lower side of the oil pipe thread to buffer and protect the oil pipe thread. The rubber pad 32 is arc-shaped and curved upward, which can more easily support the oil pipe thread and prevent the oil pipe thread from falling from the side of the trolley 3.

[0046] The trolley 3 is installed on the guide rail 2 and slides along the length direction of the guide rail 2, and the baffle 22 on the guide rail 2 limits the trolley 3 to prevent the trolley 3 from sliding out of the end of the guide rail 2. The trolley 3 is a U-shaped block and is buckled on the guide rail 2. The inner side of the trolley 3 is fitted with the side of the guide rail 2, and the sliding block 31 is fixedly connected to the inner side of the trolley 3. When the trolley 3 is buckled on the guide rail 2, the sliding block 31 is embedded in the groove 21 of the guide rail 2, so that the trolley 3 is connected with the guide rail 2. The sliding block 31 and the groove 21 limit the separation of the trolley 3 and the guide rail 2 in the longitudinal direction, so that the trolley 3 can be firmly installed on the guide rail 2, thereby preventing the trolley 3 from falling off. Each guide rail 2 is provided with one trolley 3.

[0047] Referring to Figure 2 , Figure 5 The traction assembly 4 includes two fixed pulleys 41 and a traction ring 42 wound around the two fixed pulleys 41. The two fixed pulleys 41 are fixedly connected to the guide rail 2 and are installed between the two guide rails 2, and the two fixed pulleys 41 are arranged transversely. The fixed pulley 41 is fixedly connected to the end of the guide rail 2. The traction ring 42 is sleeved on the two fixed pulleys 41, and the traction ring 42 is arranged between the two guide rails 2. The two sides of the traction ring 42 are fixedly connected to the two trolleys 3, respectively. When the trolley 3 moves, it drives the traction ring 42 to slide on the fixed pulley 41. Moreover, the two sides of the traction ring 42 are fixedly connected to the trolley 3, so that when one trolley 3 moves forward, the other trolley 3 moves in the opposite direction, so that when the oil pipe is transported, the two trolleys 3 can circularly transport the oil pipe through reciprocating action.

[0048] The use method of the oil pipe thread protection device in the embodiment of the application is as follows: when the oil pipe needs to be transported, the oil pipe is placed on the trolley 3, and then the trolley 3 is controlled to advance, in the advancing process of the trolley 3, the sliding block 31 on the trolley 3 is located in the groove 21 of the guide rail 2, the inner side of the trolley 3 is attached to the side of the guide rail 2, the trolley 3 is prevented from turning on one side, and the roller 33 is arranged to accelerate the sliding speed of the trolley 3 on the guide rail 2 and improve the transportation efficiency. And through the arrangement of the traction assembly 4, the two trolleys 3 can cyclically transport the oil pipe through reciprocating action, further improving the oil pipe transportation efficiency. The rubber pad 32 is arranged to effectively protect the oil pipe thread. Through the arrangement of the oil pipe thread protection device and the transportation of the oil pipe through the device, the oil pipe device can cyclically transport the oil pipe regardless of the length of the oil pipe, ensure smoothness and one-step operation, and speed up the construction speed. According to the calculation of 300 oil pipes per shift, the construction site personnel need to walk nearly 3 kilometers of road by using the old small trolley 3, and after the oil pipe thread protection device is used, the on-site personnel can complete the work of 300 oil pipes without moving, which not only reduces the occupied well period, improves the construction speed, but also greatly reduces the labor intensity of the on-site construction personnel, improves the continuity of time efficiency, and improves the safety of the oil pipe operation.

[0049] The term "comprising" or any other similar word is intended to encompass non-exclusive inclusion, so that a process, method, article or equipment / device including a series of elements includes not only those elements, but also other elements not explicitly listed, or inherent elements of the process, method, article or equipment / device.

[0050] So far, the technical solutions of the application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the application, and the technical solutions after the changes or replacements will fall within the protection scope of the application.

Claims

1. A thread protection device for oil pipes, characterized in that: It includes multiple support columns (1), a guide rail (2) fixedly connected to the top of the support column (1), and a trolley (3) installed on the guide rail (2); The guide rail (2) is I-shaped and has grooves (21) on both sides; The trolley (3) is a U-shaped block that is fastened to the guide rail (2). The inner side of the trolley (3) is in contact with the side of the guide rail (2), and a slider (31) is fixedly connected to the inner side of the trolley (3). When the trolley (3) is fastened to the guide rail (2), the slider (31) is embedded in the groove (21) of the guide rail (2).

2. The oil pipe thread protection device according to claim 1, characterized in that: The trolley (3) is also equipped with a roller (33) on its inner side. The roller (33) is installed at the top of the inner side of the trolley (3) and is in contact with the upper side of the guide rail (2).

3. The oil pipe thread protection device according to claim 2, characterized in that: Two rollers (33) are installed on the trolley (3), and the two rollers (33) are arranged at the same height.

4. The oil pipe thread protection device according to claim 1, characterized in that: A rubber pad (32) is fixedly connected to the upper side of the trolley (3).

5. The oil pipe thread protection device according to claim 4, characterized in that: The rubber pad (32) is arc-shaped and curved upwards.

6. The oil pipe thread protection device according to claim 1, characterized in that: The guide rail (2) is fixedly connected to baffles (22) at both ends.

7. The oil pipe thread protection device according to claim 1, characterized in that: The guide rail (2) is provided in two sections, and a trolley (3) is installed on each guide rail (2).

8. The oil pipe thread protection device according to claim 7, characterized in that: It also includes a traction assembly (4), which includes two fixed pulleys (41) and a traction ring (42) wound around the two fixed pulleys (41). The two fixed pulleys (41) are fixedly connected to the guide rail (2) and are installed between the two guide rails (2). Two fixed pulleys (41) are arranged laterally and fixedly connected to the end of the guide rail (2); The traction ring (42) is sleeved on two fixed pulleys (41) and arranged between two guide rails (2). The two sides of the traction ring (42) are fixedly connected to two trolleys (3).

9. The oil pipe thread protection device according to claim 1, characterized in that: The support column (1) is a hydraulic cylinder.

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