A tubing external scraper

Abstract

The utility model discloses an oil pipe outer wall scraping device belongs to oil exploitation technical field. The oil pipe outer wall scraping device includes outer cylinder, oil pipe fracture finishing mechanism and a plurality of oil pipe outer wall scraping mechanism, the oil pipe fracture finishing mechanism is established in the outer cylinder, a plurality of the oil pipe outer wall scraping mechanism all are established on the cylinder wall of outer cylinder, and all partially extend to the outer cylinder, a plurality of the oil pipe outer wall scraping mechanism all are located the same side of oil pipe fracture finishing mechanism. Through the external force drive outer cylinder, oil pipe fracture finishing mechanism and oil pipe outer wall scraping mechanism relative fracture oil pipe keep the rotating state, then in the process that oil pipe outer wall scraping device reciprocatingly lowers and lifts, through oil pipe outer wall scraping mechanism gradually scrapes all dirt on the oil pipe outer wall near fracture, when the fracture on oil pipe and oil pipe fracture finishing mechanism keep contact, oil pipe fracture finishing mechanism follows outer cylinder and under the drive of external force relative fracture oil pipe rotates and moves downward state, realizes to the finishing of oil pipe fracture.

Description

Technical Field

[0001] This utility model relates to an external wall scraper for oil pipes, belonging to the field of petroleum extraction technology. Background Technology

[0002] Oil extraction refers to the process of extracting crude oil from underground reservoirs and is one of the core links in the petroleum industry. During oil extraction, pipelines are the crucial channels connecting the downhole reservoir to the surface production system. However, as oil extraction progresses into the later stages, accidents such as pipeline wear-through or breakage frequently occur, severely impacting extraction efficiency and increasing costs. Therefore, manual intervention is necessary to quickly restore the pipelines to their function as oil transport channels.

[0003] One common practice is to reconnect the oil pipe that fell to the bottom of the well to restore it as an oil transport channel. However, because the oil pipe has been immersed in the oil-water layer for a long time, a lot of dirt will be attached to its outer wall, and the oil pipe break is usually irregular. Therefore, it is necessary to clean the dirt on the outer wall of the oil pipe near the break and repair the oil pipe break before the broken oil pipe can be reconnected normally.

[0004] However, common tubing wall scrapers are mainly internal scrapers, such as the ball-throwing controllable scraper provided in patent document CN104453787A and the swing-type shallow pipe inner wall oil and impurity scraping device provided in patent document CN112845412A. They do not have the function of scraping off dirt from the outer wall of the tubing, nor do they have the function of repairing tubing breaks. Based on this, an external tubing wall scraper is proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an external scraper for oil pipes.

[0006] This utility model is achieved through the following technical solution:

[0007] An external wall scraper for oil pipes includes an outer cylinder, an oil pipe break trimming mechanism, and several external wall scraping mechanisms for oil pipes. The oil pipe break trimming mechanism is located inside the outer cylinder, and the several external wall scraping mechanisms for oil pipes are all located on the cylinder wall of the outer cylinder and partially extend into the outer cylinder. The several external wall scraping mechanisms for oil pipes are all located on the same side of the oil pipe break trimming mechanism.

[0008] The outer cylinder includes an upper connector, an extension cylinder, and a guide shoe. One end of the extension cylinder is connected to one end of the upper connector via a connecting cylinder, and one end of the guide shoe is connected to the end of the extension cylinder away from the connecting cylinder via a scraping cylinder.

[0009] The oil pipe break trimming mechanism includes a grinding shoe body and a spring. The grinding shoe body is located inside the connecting cylinder and is splinedly connected to the connecting cylinder. A hard alloy layer is provided on one end face of the grinding shoe body. One end of the spring is connected to the upper connector, and the other end is connected to the end of the grinding shoe body away from the hard alloy layer.

[0010] The grinding shoe body has multiple liquid passage holes along the axial direction.

[0011] A straightening guide rod is coaxially connected to the end of the grinding shoe body away from the spring, and the end of the straightening guide rod away from the grinding shoe body has a chamfer along the circumference.

[0012] The extended cylinder is equipped with a retaining ring. The radial direction of the retaining ring is limited by the extended cylinder, and the axial direction is limited by one end face of the connecting cylinder and the stepped surface on the inner wall of the extended cylinder.

[0013] The scraping cylinder is equipped with two external scraping mechanisms for oil pipes.

[0014] The tubing external scraping mechanism includes multiple external scraping components evenly distributed on the wall of the scraping cylinder.

[0015] The outer wall scraping components in the two outer wall scraping mechanisms of the oil pipe are staggered in the circumferential direction of the scraping cylinder.

[0016] The outer wall of the scraper cylinder is provided with a pressure plate mounting groove at a position corresponding to the outer scraper wall assembly. The bottom of the pressure plate mounting groove is provided with a T-shaped sliding hole that communicates with the interior of the scraper cylinder.

[0017] The outer wall scraping assembly includes a pressure plate and a T-shaped scraper. The pressure plate is located in the pressure plate mounting groove and is connected to the scraping cylinder by multiple screws. The T-shaped scraper is slidably connected to the T-shaped sliding hole and is connected to the pressure plate by multiple compression springs. Under the spring force of the compression springs, the T-shaped scraper extends partially into the scraping cylinder.

[0018] The beneficial effects of this utility model are as follows:

[0019] The tubing external scraper is slowly lowered to the broken tubing at the bottom of the well. Then, driven by external force, the outer cylinder, tubing break trimming mechanism, and tubing external scraping mechanism are slowly rotated relative to the broken tubing. Next, the tubing external scraper is slowly pressed down, and the upper end of the broken tubing is introduced into the outer cylinder. During this process, the tubing external scraping mechanism scrapes away the dirt on the outer wall of the tubing near the break. After the tubing external scraper has been lowered to a certain depth, it is slowly raised to a certain height. Thus, during the reciprocating lowering and raising of the tubing external scraper, the tubing external scraping mechanism gradually scrapes away all the dirt on the outer wall of the tubing near the break. When the broken end of the tubing is in contact with the tubing break trimming mechanism, the tubing break trimming mechanism, driven by external force, rotates and moves downward relative to the broken tubing, thus trimming the broken end of the tubing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1-Upper connector, 2-Connecting cylinder, 3-Oil pipe break trimming mechanism, 31-Spring, 32-Grinding shoe body, 320-Passing fluid hole, 33-Carbide layer, 34-Straightening guide rod, 340-Chamfer, 4-Sticking ring, 5-Extended cylinder, 6-Scraping cylinder, 60-T-shaped sliding hole, 7-Oil pipe external wall scraping mechanism, 71-Pressure plate, 72-T-shaped scraper, 73-Compression spring, 74-Screw, 8-Guiding shoe. Detailed Implementation

[0022] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0023] like Figure 1 As shown, the present invention provides an external pipe scraper, comprising an outer cylinder, a pipe break trimming mechanism 3, and a plurality of external pipe scraping mechanisms 7. The pipe break trimming mechanism 3 is located inside the outer cylinder, and the plurality of external pipe scraping mechanisms 7 are all located on the cylinder wall of the outer cylinder and partially extend into the outer cylinder. The plurality of external pipe scraping mechanisms 7 are all located on the same side of the pipe break trimming mechanism 3. The tubing external scraper is slowly lowered to the broken tubing at the bottom of the well. Then, driven by external force, the outer cylinder, the tubing break trimming mechanism 3, and the tubing external scraper 7 are slowly rotated relative to the broken tubing. Next, the tubing external scraper is slowly pressed down, and the upper end of the broken tubing is introduced into the outer cylinder. During this process, the tubing external scraper 7 scrapes away the dirt on the outer wall of the tubing near the break. After the tubing external scraper has been lowered to a certain depth, it is slowly raised to a certain height. Thus, during the reciprocating lowering and raising of the tubing external scraper, the tubing external scraper 7 gradually scrapes away all the dirt on the outer wall of the tubing near the break. When the break in the tubing is in contact with the tubing break trimming mechanism 3, the tubing break trimming mechanism 3 follows the outer cylinder and rotates and moves downward relative to the broken tubing under the drive of external force, thereby trimming the tubing break.

[0024] The outer cylinder includes an upper connector 1, an extension cylinder 5, and a guide shoe 8. One end of the extension cylinder 5 is connected to one end of the upper connector 1 via a connecting cylinder 2, and one end of the guide shoe 8 is connected to the end of the extension cylinder 5 away from the connecting cylinder 2 via a scraping cylinder 6. The connecting cylinder 2 is threadedly connected to the upper connector 1 and the extension cylinder 5, and the scraping cylinder 6 is threadedly connected to the extension cylinder 5 and the guide shoe 8.

[0025] The oil pipe break trimming mechanism 3 includes a grinding shoe body 32 and a spring 31. The grinding shoe body 32 is located inside the connecting cylinder 2 and is splinedly connected to the connecting cylinder 2. A carbide layer 33 is provided on one end face of the grinding shoe body 32. One end of the spring 31 is connected to the upper connector 1, and the other end is connected to the end of the grinding shoe body 32 away from the carbide layer 33. After the grinding shoe body 32 is splinedly connected to the connecting cylinder 2, the grinding shoe body 32 can move axially relative to the connecting cylinder 2. The carbide layer 33 is used to grind the oil pipe break to achieve the purpose of trimming the oil pipe break. The grinding shoe body 32 forms a flexible connection with the upper connector 1 through the spring 31, so that the grinding shoe body 32 can maintain continuous contact with the break when trimming the oil pipe break without causing significant damage to the oil pipe break.

[0026] The grinding shoe body 32 has multiple liquid passage holes 320 along the axial direction. The internal spaces of the outer cylinder on both sides of the grinding shoe body 32 are connected through the multiple liquid passage holes 320, which facilitates the flow of liquid into the outer cylinder to flush the outer wall of the broken oil pipe during the process of scraping off the dirt on the outer wall of the broken oil pipe.

[0027] A straightening guide rod 34 is coaxially connected to one end of the grinding shoe body 32 away from the spring 31. The straightening guide rod 34 has a chamfer 340 along its circumference at one end away from the grinding shoe body 32. During the process of the oil pipe breakage trimming mechanism 3 trimming the broken oil pipe, the upper end of the broken oil pipe is guided and straightened by the straightening guide rod 34.

[0028] The extended cylinder 5 is equipped with a retaining ring 4. The radial direction of the retaining ring 4 is limited by the extended cylinder 5, and the axial direction is limited by one end face of the connecting cylinder 2 and the stepped surface on the inner wall of the extended cylinder 5. The retaining ring 4 and the upper connector 1 limit the grinding shoe body 32 in the axial direction of the outer cylinder, so that the grinding shoe body 32 can only move between the retaining ring 4 and the upper connector 1.

[0029] The scraper cylinder 6 is provided with two external scraping mechanisms 7 for oil pipes.

[0030] The external scraping mechanism 7 of the oil pipe includes multiple external scraping components evenly distributed on the wall of the scraping cylinder 6.

[0031] The external scraping components of the two external scraping mechanisms 7 are staggered in the circumferential direction of the scraping cylinder 6. Installing two external scraping mechanisms 7 on the cylinder wall of the scraping cylinder 6 and staggering the external scraping components of the two external scraping mechanisms 7 in the circumferential direction of the scraping cylinder 6 can improve the efficiency of the external scraper in removing dirt from the outer wall of the broken oil pipe.

[0032] The outer wall of the scraper cylinder 6 is provided with a pressure plate mounting groove at a position corresponding to the outer scraper wall assembly. A T-shaped sliding hole 60 is provided at the bottom of the pressure plate mounting groove to communicate with the interior of the scraper cylinder 6.

[0033] The outer wall scraping assembly includes a pressure plate 71 and a T-shaped scraper 72. The pressure plate 71 is located in the pressure plate mounting groove and is connected to the scraping cylinder 6 by multiple screws 74. The T-shaped scraper 72 is slidably connected to the T-shaped sliding hole 60 and is connected to the pressure plate 71 by multiple compression springs 73. Under the spring force of the compression springs 73, the T-shaped scraper 72 extends partially into the scraping cylinder 6.

[0034] The working principle or usage process of the external pipe scraper of this utility model is as follows:

[0035] The tubing external scraper is slowly lowered to the broken tubing at the bottom of the well. Then, by external force, the outer cylinder, the tubing break trimming mechanism 3, and the tubing external scraper mechanism 7 are slowly rotated relative to the broken tubing. Next, the tubing external scraper is slowly pressed down, and the upper end of the broken tubing is introduced into the outer cylinder using the guide shoe 8. Then, the T-shaped scraper 72 continues to contact the outer wall of the broken tubing under the spring force of the compression spring 73 to scrape off the dirt on the outer wall of the tubing near the break. After the tubing external scraper is lowered to a certain depth, it is slowly raised to a certain height. Thus, during the reciprocating lowering and raising of the tubing external scraper, all the dirt on the outer wall of the tubing near the break is gradually scraped off by the T-shaped scraper 72.

[0036] When the carbide layer 33 is in contact with the broken end of the tubing under the spring force of the spring 31, the tubing break repair mechanism 3 rotates relative to the broken tubing under the drive of the external force, and uses the carbide layer 33 to grind the broken end of the tubing, so as to repair the broken end of the tubing.

Claims

1. An external wall scraper for oil pipes, characterized in that: It includes an outer cylinder, a tubing break trimming mechanism (3) and several tubing external wall scraping mechanisms (7). The tubing break trimming mechanism (3) is located inside the outer cylinder. Several tubing external wall scraping mechanisms (7) are all located on the cylinder wall of the outer cylinder and partially extend into the outer cylinder. Several tubing external wall scraping mechanisms (7) are all located on the same side of the tubing break trimming mechanism (3).

2. The tubing external scraper as described in claim 1, characterized in that: The outer cylinder includes an upper connector (1), an extension cylinder (5), and a guide shoe (8). One end of the extension cylinder (5) is connected to one end of the upper connector (1) through a connecting cylinder (2), and one end of the guide shoe (8) is connected to the end of the extension cylinder (5) away from the connecting cylinder (2) through a scraping cylinder (6).

3. The tubing external scraper as described in claim 2, characterized in that: The oil pipe break repair mechanism (3) includes a grinding shoe body (32) and a spring (31). The grinding shoe body (32) is located inside the connecting cylinder (2) and is splinedly connected to the connecting cylinder (2). A hard alloy layer (33) is provided on one end face of the grinding shoe body (32). One end of the spring (31) is connected to the upper connector (1), and the other end is connected to the end of the grinding shoe body (32) away from the hard alloy layer (33).

4. The tubing external scraper as described in claim 3, characterized in that: The grinding shoe body (32) has multiple liquid passage holes (320) along the axial direction.

5. The tubing external scraper as described in claim 3, characterized in that: A straightening guide rod (34) is coaxially connected to one end of the grinding shoe body (32) away from the spring (31), and a chamfer (340) is provided on the other end of the straightening guide rod (34) away from the grinding shoe body (32) in the circumferential direction.

6. The tubing external scraper as described in claim 2, characterized in that: The extended cylinder (5) is provided with a retaining ring (4). The radial direction of the retaining ring (4) is limited by the extended cylinder (5), and the axial direction is limited by one end face of the connecting cylinder (2) and the stepped surface on the inner wall of the extended cylinder (5).

7. The tubing external scraper as described in claim 2, characterized in that: The scraper cylinder (6) is provided with two external scraping mechanisms (7) on the cylinder wall.

8. The tubing external scraper as described in claim 7, characterized in that: The external scraping mechanism (7) of the oil pipe includes multiple external scraping components evenly distributed on the wall of the scraping cylinder (6).

9. The tubing external scraper as described in claim 8, characterized in that: The outer wall scraping components in the two outer wall scraping mechanisms (7) of the oil pipe are arranged in a staggered manner in the circumferential direction of the scraping cylinder (6).

10. The tubing external scraper as described in claim 8 or 9, characterized in that: The outer wall of the scraper cylinder (6) is provided with a pressure plate mounting groove at a position corresponding to the outer scraper assembly. A T-shaped sliding hole (60) is provided at the bottom of the pressure plate mounting groove, which communicates with the interior of the scraper cylinder (6). The outer wall scraping assembly includes a pressure plate (71) and a T-shaped scraper (72). The pressure plate (71) is located in the pressure plate mounting groove and is connected to the scraping cylinder (6) by multiple screws (74). The T-shaped scraper (72) is slidably connected to the T-shaped sliding hole (60) and is connected to the pressure plate (71) by multiple compression springs (73). The T-shaped scraper (72) extends partially into the scraping cylinder (6) under the spring force of the compression springs (73).

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