Efficient expansion pipe casing patching device

Abstract

The invention belongs to the technical field of oil exploitation, and provides an efficient expansion pipe casing patching device which comprises a high-pressure hose, a power unit and a control unit, the power unit is fixedly connected to one end of the high-pressure hose, the control unit is arranged at the end, away from the high-pressure hose, of the power unit, and an expansion pipe body is arranged at the end, away from the power unit, of the control unit. A suspension system is installed at the end, away from the control unit, of the expansion pipe. The rolling wheels are attached to the inner wall of a pipeline to assist the device in moving downwards, the rolling wheels stop when meeting resistance, a sensor transmits data to a terminal, a worker can conveniently find the problem at the position, the [-shaped block moves towards the first spring and compresses the first spring, and the cylinder is used for limiting the first spring to shake all around; the first spring pushes the U-shaped block to move to the position away from the first spring, so that the rolling wheel is attached to the pipe wall all the time, some other problems in the pipeline can be found, convenience is provided for workers, and the workload of the workers is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oil exploitation, in particular to a high-efficiency expansion pipe casing patching device. Background Art

[0002] As the development of oil fields progresses, the oil layer casing is constantly deformed, cracked, dislocated, perforated, and damaged due to the combined influence of internal and external factors such as geological structure, sand production in oil layers, oil and water well production enhancement measures, and well repair operations. In the middle and late stages of oil field development, casing damage is particularly serious; oil layer casing damage prevents oil and water wells from normal production and operation; therefore, casing repair has become an important part of oil field overhaul operations; casing patching is to stick or squeeze the patching pipe to the damaged part of the casing to repair and patch the casing, but the patching pipe is prone to get stuck during the process of going down the well, which makes subsequent work impossible.

[0003] In summary, the present invention provides a high-efficiency expansion pipe casing patching device to solve the above-mentioned problems. Summary of the invention

[0004] The invention provides a high-efficiency expansion pipe casing patching device to solve the problems existing in the background technology.

[0005] The technical solution of the present invention is as follows:

[0006] A high-efficiency expansion pipe casing patching device comprises: a high-pressure hose, a power unit and a control unit, wherein the power unit is fixedly connected to one end of the high-pressure hose, the control unit is arranged at an end of the power unit away from the high-pressure hose, an expansion pipe body is arranged at the end of the control unit away from the power unit, and a suspension system is installed at the end of the expansion pipe body away from the control unit.

[0007] Furthermore, the expansion tube body includes a connecting rod and an expansion cone, the connecting rod is arranged at the bottom of the control unit, the expansion cone is fixedly connected to one end of the connecting rod away from the control unit, an expansion tube is installed on the end of the expansion cone away from the connecting rod, the expansion cone is embedded in the inner wall of the expansion tube, the conical surface of the expansion cone is tightly connected to the conical surface of the inner wall of the expansion tube, and the end of the expansion tube away from the expansion cone is threadedly connected to a lower bottom plug.

[0008] Furthermore, the suspension system includes an outer shell and a cylinder, the outer shell is arranged at an end of the lower bottom plug away from the expansion tube, a fixing column is fixedly connected to the inside of the outer shell, the cylinder is fixedly connected to the fixing column, a telescopic rod is arranged on one side of the cylinder, and the telescopic rod is fixedly connected to the fixing column.

[0009] Further, a first spring is arranged inside the cylinder. One end of the first spring is fixedly connected to the fixed column, and the other end of the first spring away from the fixed column is fixedly connected to a U-shaped block. A fixed block is fixedly connected to the top of the side of the U-shaped block close to the telescopic rod. A push rod is fixedly connected to the side of the fixed block close to the telescopic rod. A rack is fixedly connected to the side of the U-shaped block close to the telescopic rod. A roller is rotatably connected inside the U-shaped block to assist the device in sliding inside the pipeline.

[0010] Further, the end of the telescopic rod away from the fixed column is fixedly connected to a positioning block. A limiting block is slidably connected to the side of the positioning block away from the telescopic rod. A limiting rod is fixedly connected to the upper one-third of the side of the positioning block close to the limiting block. There are two limiting rods in total, and the two limiting rods are symmetrically arranged. A rotating block is arranged between the two limiting rods. The rotating block is rotatably connected to the positioning block. One end of the rotating block is slidably connected to the push rod, and the other end of the rotating block is connected to a connecting rod. A square groove is formed at the end of the connecting rod where it is connected to the rotating block. The rotating block slides in the square groove on the connecting rod. A second spring is arranged on the connecting rod. One end of the second spring is fixedly connected to the end of the rotating block.

[0011] Further, a convex block is arranged at the bottom of the positioning block. The side of the convex block close to the connecting rod is arc-shaped, and the bottom of the connecting rod is semi-circular. An elliptical track is formed on the positioning block. The connecting rod slides on the elliptical track.

[0012] Further, a square groove is formed on the side of the positioning block away from the U-shaped block. A ratchet tooth is fixedly connected inside the square groove. A clamping tooth is arranged on the side of the limiting block opposite to the ratchet tooth. The clamping tooth meshes with the ratchet tooth. A square hole is formed on the side of the positioning block where the square groove is located. A gear is arranged inside the square hole. A tooth row is arranged on the side of the connecting rod close to the gear.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention uses the roller to fit the inner wall of the pipeline to assist the device in moving downward. A sensor is arranged on one side of the roller to detect the number of turns of the roller rolling. When the roller encounters resistance, it will pause, and the sensor will transmit the data to the terminal, which is convenient for the staff to discover problems here. The U-shaped block moves towards the direction of the first spring and compresses the first spring. The cylinder is used to limit the first spring from shaking around. When passing through the depression, the first spring pushes the U-shaped block to move away from the position of the first spring, so that the roller is always in contact with the pipe wall, and some other problems in the pipeline can be found, which provides convenience for the staff and reduces the workload of the staff.

[0015] 2. In the present invention, the tooth row meshes with the gear when following the movement of the connecting rod, and the gear drives the rack to move in the opposite direction, so that the side roller returns to its original position and keeps the device in the center of the pipeline, which is convenient for patching the pipeline. At the same time, the push rod close to spring 1 pushes the connecting rod back to its position, and the connecting rod moves along the elliptical track on the positioning block away from the gear, so that the tooth row does not mesh with the gear, and then the connecting rod cannot drive the gear to rotate when it rotates; the device ensures precise positioning through the suspension system, and the expansion body is pre-pressed, the power unit is started, and power is provided by the control unit to expand the expansion tube body; thereby, the expansion tube body is tightly fitted to the casing wall, forming a seal with the casing wall, and the fit is tight and firm, thereby repairing this section of the problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a stereogram of the device of the present invention;

[0017] Figure 2 It is a partial diagram of the device of the present invention;

[0018] Figure 3 It is the internal structure diagram of the device of the present invention;

[0019] Figure 4 is a cross-sectional view of the device of the present invention;

[0020] Figure 5 The present invention Figure 3 Enlarged view of point A in the middle;

[0021] Figure 6 The present invention Figure 3 Enlarged view of point B in the middle;

[0022] Figure 7 The present invention Figure 4 Enlarged view of point C in the middle;

[0023] Figure 8 The present invention Figure 4 Enlarged view of point D in the middle;

[0024] Fig. 9 It is a solid diagram of the expansion tube body of the present invention.

[0025] In the figure:

[0026] 1. High-pressure hose; 2. Power unit; 3. Control unit; 4. Expansion tube body; 41. Connecting rod; 42. Expansion cone; 43. Expansion tube; 44. Bottom plug; 5. Suspension system; 51. Shell; 511. Fixed column; 52. Cylinder; 521. Spring one; 522. Shaped block; 5221. Fixed block; 5222. Push rod; 5223. Rack; 523. Roller; 53. Telescopic rod; 531. Positioning block; 5311. Ratchet; 5312. Square hole; 5313. Gear; 532. Limit block; 533. Limit rod; 534. Rotating block; 535. Connecting rod; 5351. Gear row; 536. Spring two. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] like Figure 1-9 As shown, the present invention provides a high-efficiency expansion pipe casing patching device, comprising: a high-pressure hose 1, a power unit 2 and a control unit 3, wherein the power unit 2 is fixedly connected to one end of the high-pressure hose 1, the control unit 3 is arranged at an end of the power unit 2 away from the high-pressure hose 1, an expansion pipe body 4 is arranged at the end of the control unit 3 away from the power unit 2, and a suspension system 5 is installed at the end of the expansion pipe body 4 away from the control unit 3.

[0029] As an embodiment of the present invention, the expansion tube body 4 includes a connecting rod 41 and an expansion cone 42, the connecting rod 41 is arranged at the bottom of the control unit 3, the expansion cone 42 is fixedly connected to the end of the connecting rod 41 away from the control unit 3, an expansion tube 43 is installed at the end of the expansion cone 42 away from the connecting rod 41, the expansion cone 42 is embedded in the inner wall of the expansion tube 43, the conical surface of the expansion cone 42 is tightly connected to the conical surface of the inner wall of the expansion tube 43, and the end of the expansion tube 43 away from the expansion cone 42 is threadedly connected with a lower bottom plug 44.

[0030] As an embodiment of the present invention, the suspension system 5 includes an outer shell 51 and a cylinder 52. The outer shell 51 is arranged at one end of the lower bottom plug 44 away from the expansion tube 43. A fixing column 511 is fixedly connected inside the outer shell 51. The cylinder 52 is fixedly connected to the fixing column 511. A telescopic rod 53 is arranged on one side of the cylinder 52, and the telescopic rod 53 is fixedly connected to the fixing column 511.

[0031] As an implementation manner of the present invention, a first spring 521 is arranged inside the cylinder 52. One end of the first spring 521 is fixedly connected to the fixed column 511, and a U-shaped block 522 is fixedly connected to the end of the first spring 521 away from the fixed column 511. A fixed block 5221 is fixedly connected to the top of the side of the U-shaped block 522 close to the telescopic rod 53. A push rod 5222 is fixedly connected to the side of the fixed block 5221 close to the telescopic rod 53. A rack 5223 is fixedly connected to the side of the U-shaped block 522 close to the telescopic rod 53. A roller 523 is rotatably connected inside the U-shaped block 522 to assist the device in sliding inside the pipeline.

[0032] As an implementation manner of the present invention, a positioning block 531 is fixedly connected to the end of the telescopic rod 53 away from the fixed column 511. A limiting block 532 is slidably connected to the side of the positioning block 531 away from the telescopic rod 53. A limiting rod 533 is fixedly connected to the upper one-third of the side of the positioning block 531 close to the limiting block 532. There are two limiting rods 533 in total, and the two limiting rods 533 are symmetrically arranged. A rotating block 534 is arranged between the two limiting rods 533. The rotating block 534 is rotatably connected to the positioning block 531. One end of the rotating block 534 is slidably connected to the push rod 5222, and the other end of the rotating block 534 is connected to a connecting rod 535. A square groove is opened at the end of the connecting rod 535 where it is connected to the rotating block 534. The rotating block 534 slides in the square groove on the connecting rod 535. A second spring 536 is arranged on the connecting rod 535. One end of the second spring 536 is fixedly connected to the end of the rotating block 534.

[0033] As an implementation manner of the present invention, a convex block is arranged at the bottom of the positioning block 531. The side of the convex block close to the connecting rod 535 is arc-shaped, and the bottom of the connecting rod 535 is semi-circular. An elliptical track is opened on the positioning block 531. The connecting rod 535 slides on the elliptical track to facilitate the engagement of the tooth row 5351 and the gear 5313.

[0034] As an implementation manner of the present invention, a square groove is opened on the side of the positioning block 531 away from the U-shaped block 522. A ratchet 5311 is fixedly connected inside the square groove. A clamping tooth is arranged on the side of the limiting block 532 opposite to the ratchet 5311. The clamping tooth is engaged with the ratchet 5311. A square hole 5312 is opened on the side of the positioning block 531 where the square groove is located. A gear 5313 is arranged inside the square hole 5312. A tooth row 5351 is arranged on the side of the connecting rod 535 close to the gear 5313.

[0035] Specific working principle:

[0036] First, as Figure 3-7 As shown, the staff first push the limit block 532 towards the telescopic rod 53 according to the size of the pipeline. The teeth on the limit block 532 are engaged with the ratchet teeth 5311 to prevent the limit block 532 from retracting. The limit block 532 is used to limit the moving distance of the connecting rod 535, so as to control the extending distance of the roller 523. Then, the device is placed into the pipeline. The three rollers 523 are attached to the inner wall of the pipeline to assist the device to move downward. A sensor is provided on one side of the roller 523 to detect the number of turns of the roller 523. When the roller 523 encounters some concave or convex places in the pipeline, the roller 523 will pause due to resistance. At this time, the sensor on one side of the roller 523 senses it and transmits the data to the terminal, which is convenient for the staff to find the problems here. At the same time, if it encounters a convex place, the roller 523 will drive the U-shaped block 522 towards the direction of the first spring 521 and compress the first spring 521. The cylinder 52 is used to limit the first spring 521 from shaking around. When passing through the concave place, the first spring 521 pushes the U-shaped block 522 towards the position away from the first spring 521, so that the roller 523 is always in contact with the pipe wall, which can find some other problems in the pipeline, provide convenience for the staff and reduce the workload of the staff.

[0037] Then, as Figure 2-8As shown in the figure, when the C-shaped block 522 moves, the push rod 5222 will push the rotating block 534 to rotate towards the telescopic rod 53. If it is only a small depression, it is not enough to drive the rotating block 534 to turn to the other side. The rotating block 534 can only rotate halfway. If there is continuous deviation, the push rod 5222 drives one end of the rotating block 534 to rotate towards the telescopic rod 53, and the other end of the rotating block 534 rotates away from the telescopic rod 53, and drives the connecting rod 535 to rotate in the opposite direction. At the same time, the rotating block 534 compresses the second spring 536. When the rotating block 534 turns to the vertical state, the thrust on the second spring 536 is the largest. When the second spring 536 is compressed, it stores elastic force. When the rotating block 534 turns to the other side, the thrust felt by the second spring 536 decreases, and the second spring 536 rebounds and accelerates the rotation of the rotating block 534, and at the same time also plays an auxiliary pushing role in the rotation of the connecting rod 535; when the connecting rod 535 rotates, it moves along the elliptical track on the positioning block 531 towards the side close to the gear 5313, so that the tooth row 5351 meshes with the gear 5313 when following the connecting rod 535 and drives the gear 5313 to rotate. At the same time, the gear 5313 drives the rack 5223 to move in the opposite direction and pushes the C-shaped block 522 to move away from the first spring 521, so that the roller 523 on that side returns to its original position and keeps the device in the center position of the pipeline, which is convenient for patching the pipeline. At the same time, the push rod 5222 close to the first spring 521 pushes the connecting rod 535 to return to its position, and the connecting rod 535 moves along the elliptical track on the positioning block 531 away from the side of the gear 5313, so that the tooth row 5351 does not mesh with the gear 5313, and thus the connecting rod 535 cannot drive the gear 5313 to rotate when it rotates; this device ensures accurate positioning through the suspension system 5. By pre-pressing the expansion tube body 4, the power unit 2 is started, and power is provided through the control unit 3 to make the expansion tube body 4 expand; thus, the expansion tube body 4 tightly fits the casing wall, forms a seal with the casing wall, fits tightly, and repairs the problems in this section.

[0038] As Figure 2 shown, it should be noted that: ① The expansion tube 43 can meet the patching requirements of long well sections, is easy to connect, and does not affect the sealing performance of the thread after expansion;

[0039] ② There is no need to fill other media between the old well casing and the expansion tube 43. Through metal-to-metal expansion sealing, the contact surface is well integrated, and there is no gap between the two layers of casings;

[0040] ③ The expansion tube 43 patches the casing, effectively plugs the leakage part while strengthening the old well casing and improving the external extrusion resistance of the casing;

[0041] ④ The sealing rubber parts at both ends of the expansion tube 43 have the characteristics of pressure resistance, high temperature resistance, corrosion resistance, etc., and can ensure a long effective period.

[0042] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An efficient expansion pipe casing patching device, comprising: High-pressure hose (1), power unit (2) and control unit (3), characterized in that: the power unit (2) is fixedly connected to one end of the high-pressure hose (1), the control unit (3) is arranged at one end of the power unit (2) away from the high-pressure hose (1), an expansion tube body (4) is arranged at one end of the control unit (3) away from the power unit (2), and a suspension system (5) is installed at one end of the expansion tube body (4) away from the control unit (3).

2. A high-efficiency expansion pipe casing patching device as claimed in claim 1, characterized in that: The expansion tube body (4) includes a connecting rod (41) and an expansion cone (42), the connecting rod (41) is arranged at the bottom of the control unit (3), the expansion cone (42) is fixedly connected to one end of the connecting rod (41) away from the control unit (3), an expansion tube (43) is installed at one end of the expansion cone (42) away from the connecting rod (41), the expansion cone (42) is embedded in the inner wall of the expansion tube (43), the conical surface of the expansion cone (42) is tightly connected to the conical surface of the inner wall of the expansion tube (43), and a bottom plug (44) is threadedly connected to one end of the expansion tube (43) away from the expansion cone (42).

3. A high-efficiency expansion pipe casing patching device as claimed in claim 2, characterized in that: The suspension system (5) includes a housing (51) and a cylinder (52), the housing (51) is arranged at one end of the bottom plug (44) away from the expansion tube (43), a fixed column (511) is fixedly connected inside the housing (51), the cylinder (52) is fixedly connected to the fixed column (511), a telescopic rod (53) is arranged on one side of the cylinder (52), and the telescopic rod (53) is fixedly connected to the fixed column (511).

4. A high-efficiency expansion pipe casing patching device as claimed in claim 3, characterized in that: A first spring (521) is arranged inside the cylinder (52), one end of the first spring (521) is fixedly connected to the fixed column (511), a U-shaped block (522) is fixedly connected to the end of the first spring (521) away from the fixed column (511), a fixed block (5221) is fixedly connected to the top of the side of the U-shaped block (522) close to the telescopic rod (53), a push rod (5222) is fixedly connected to the side of the fixed block (5221) close to the telescopic rod (53), a rack (5223) is fixedly connected to the surface of the U-shaped block (522) close to the telescopic rod (53), and a roller (523) is rotatably connected inside the U-shaped block (522).

5. A high-efficiency expansion pipe casing patching device as claimed in claim 4, characterized in that: One end of the telescopic rod (53) far from the fixed column (511) is fixedly connected with a positioning block (531). A limiting block (532) is slidably connected to one side of the positioning block (531) far from the telescopic rod (53). A limiting rod (533) is fixedly connected to the upper one-third of the side of the positioning block (531) close to the limiting block (532). There are two limiting rods (533) in total, and the two limiting rods (533) are symmetrically arranged. A rotating block (534) is arranged between the two limiting rods (533). The rotating block (534) is rotatably connected to the positioning block (531). One end of the rotating block (534) is slidably connected to the push rod (5222). The other end of the rotating block (534) is connected with a connecting rod (535). A square groove is formed at one end of the connecting rod (535) connected to the rotating block (534). The rotating block (534) slides in the square groove on the connecting rod (535). A second spring (536) is arranged on the connecting rod (535). One end of the second spring (536) is fixedly connected to the end of the rotating block (534).

6. A high-efficiency expansion pipe casing patching device as claimed in claim 5, characterized in that: A convex block is arranged at the bottom of the positioning block (531). The surface of the convex block close to the connecting rod (535) is arc-shaped, and the bottom of the connecting rod (535) is semi-circular. An elliptical track is formed on the positioning block (531). The connecting rod (535) slides on the elliptical track.

7. A high-efficiency expansion pipe casing patching device as claimed in claim 5, characterized in that: A square groove is formed on one side of the positioning block (531) far from the U-shaped block (522). A ratchet tooth (5311) is fixedly connected in the square groove. A clamping tooth is arranged on the surface of the limiting block (532) opposite to the ratchet tooth (5311). The clamping tooth is engaged with the ratchet tooth (5311). A square hole (5312) is formed on one side of the positioning block (531) where the square groove is located. A gear (5313) is arranged in the square hole (5312). A tooth row (5351) is arranged on the surface of the connecting rod (535) close to the gear (5313).

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