Straightening device for coiled tubing

Abstract

The utility model discloses a straightening device for a coiled tubing, which comprises a bottom frame, a straightening main machine is slidably mounted on the bottom frame, a righting mechanism is further arranged on one side of the bottom frame, the righting mechanism and the straightening main machine are positioned on the same axis, and the coiled tubing penetrates through the straightening main machine and the righting mechanism. The straightening main machine slides left and right on the bottom frame in the coiled tubing straightening direction. The problem that in the prior art, manual straightening efficiency is low is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil field equipment and relates to a straightening device for a continuous oil pipe. Background Art

[0002] Coiled tubing typically ranges from hundreds to thousands of meters in length. During use, it must be coiled. Wear and tear during delivery to wells, corrosion from exposure to wellbore fluids, and subtle structural defects during the manufacturing process can all lead to operational failures, resulting in serious risks on-site and failure to meet operational requirements. Localized damage to coiled tubing typically requires excision and re-welding of the cut. For ultra-deep well operations, due to height restrictions, full coils can only be transported on-site in two reels, where they are butt-welded together to meet the requirements. Before butt welding, approximately 10 meters of the tubing must be straightened to facilitate welding. Currently, this straightening process is performed manually, which is inefficient. Currently, there is no domestically available equipment that can quickly straighten coiled tubing before butt welding at oilfield wells. Utility Model Content

[0003] The purpose of the utility model is to provide a straightening device for a coiled tubing, which solves the problem of low efficiency of manual straightening in the prior art.

[0004] The technical solution adopted by the utility model is a straightening device for a coiled tubing, comprising a base frame, a straightening main machine being slidably mounted on the base frame, a straightening mechanism being further provided on one side of the base frame, the straightening mechanism and the straightening main machine being located on the same axis, the coiled tubing passing through the straightening main machine and the straightening mechanism, and the straightening main machine sliding left and right on the base frame along the straightening direction of the coiled tubing.

[0005] The utility model is also characterized in that:

[0006] The chassis is provided with at least two grooved tracks distributed along the straightening direction of the coiled tubing. A traveling wheel train is provided at the position of the bottom of the straightening main machine corresponding to the grooved track, and the traveling wheel train rolls in the corresponding grooved track.

[0007] The straightening machine includes a main frame, and a traveling wheel train is fixedly connected to the position of the grooved track at the bottom of the main frame. The right clamping wheel pair, three-point straightening mechanism, and left clamping wheel pair are arranged in sequence above the main frame along the straightening direction of the continuous oil pipe. The main frame is also provided with an operating valve body to drive the right clamping wheel pair, three-point straightening mechanism, left clamping wheel pair and traveling wheel train, and the continuous oil pipe passes through the right clamping wheel pair, three-point straightening mechanism, and left clamping wheel pair.

[0008] The right clamping wheel pair includes a right clamping cylinder and a right clamping fixed wheel arranged on both sides of the coiled tubing. A right clamping movable wheel is fixed on the right clamping cylinder. The right clamping movable wheel and the right clamping fixed wheel are correspondingly arranged on both sides of the coiled tubing. The operating valve body drives the extension and retraction of the right clamping cylinder to realize the movement of the right clamping movable wheel toward or away from the right clamping fixed wheel, thereby realizing the clamping or loosening of the coiled tubing.

[0009] The left clamping wheel pair includes a left clamping fixed wheel and a left clamping cylinder. The left clamping movable wheel is fixed on the left clamping cylinder. The left clamping movable wheel and the left clamping fixed wheel are correspondingly arranged on both sides of the coiled tubing. The operating valve body drives the extension and retraction of the left clamping cylinder to realize the movement of the left clamping movable wheel toward or away from the left clamping fixed wheel, thereby realizing the clamping or release of the coiled tubing.

[0010] A fixed frame is fixed on the upper surface of the main frame, the right clamping fixed wheel is rotatably fixed on the fixed frame, a movable frame is fixed on the right clamping oil cylinder, the right clamping movable wheel is fixed on the movable frame, the wheel surfaces of the right clamping movable wheel and the right clamping fixed wheel are arranged correspondingly, when the right clamping oil cylinder drives the right clamping movable wheel and the right clamping fixed wheel to approach and clamp, the wheel surfaces of the right clamping movable wheel and the right clamping fixed wheel clamp and squeeze the coiled tubing;

[0011] A fixed frame A is fixed on the upper surface of the main frame, and the left clamping fixed wheel is rotatably fixed on the fixed frame A. A movable frame A is fixed on the left clamping cylinder, and the left clamping movable wheel is fixed on the movable frame A. The wheel surfaces of the left clamping movable wheel and the left clamping fixed wheel are set correspondingly. When the left clamping cylinder drives the left clamping movable wheel and the left clamping fixed wheel to approach for clamping, the wheel surfaces of the left clamping movable wheel and the left clamping fixed wheel clamp and squeeze the continuous oil pipe.

[0012] The three-point straightening mechanism includes two three-point straightening mechanism fixed wheels arranged between the right clamping fixed wheel and the left clamping fixed wheel, and the two three-point straightening mechanism fixed wheels are located on the same side of the continuous oil pipe, a three-point straightening mechanism oil cylinder is arranged between the two three-point straightening mechanism fixed wheels, and a three-point straightening mechanism elbow is fixed to the protruding end of the three-point straightening mechanism oil cylinder, and the three-point straightening mechanism elbow is located on the side of the continuous oil pipe away from the three-point straightening mechanism fixed wheel. The three-point straightening mechanism elbow is set to a protruding arc surface toward the direction of the continuous oil pipe on the side close to the continuous oil pipe, and the operating valve body drives the three-point straightening mechanism cylinder to extend and retract. When the three-point straightening mechanism cylinder drives the three-point straightening mechanism elbow to extend, the three-point straightening mechanism elbow and the wheel surface of the two three-point straightening mechanism fixed wheels cooperate to achieve clamping and squeezing of the continuous oil pipe.

[0013] The right clamping and fixing wheel, the three-point straightening mechanism fixing wheel and the left clamping and fixing wheel are arranged in a row on the same straight line. The three-point straightening mechanism fixing wheel is fixed to the main frame through a fixing frame B.

[0014] The traveling wheel system includes a follower shaft wheel that is rotatably fixed on one side of the bottom of the main frame, a driving shaft wheel that is rotatably fixed on the other side of the bottom of the main frame, and a traveling motor is also fixed to the bottom of the main frame. The traveling motor is connected to the driving shaft wheel through a drive chain transmission. Both the driving shaft wheel and the follower shaft wheel roll in the grooved track of the chassis, and the operating valve body drives the traveling motor.

[0015] The operating valve body includes the right clamping cylinder extension and retraction control valve body, the three-point straightening mechanism cylinder extension and retraction control valve body, the left clamping cylinder extension and retraction control valve body and the travel motor drive control valve body. The right clamping cylinder extension and retraction control valve body, the three-point straightening mechanism cylinder extension and retraction control valve body, the left clamping cylinder extension and retraction control valve body and the travel motor drive control valve body respectively control the right clamping cylinder, the three-point straightening mechanism cylinder, the left clamping cylinder, and the travel motor.

[0016] The right clamping fixed wheel, the right clamping movable wheel, the three-point straightening mechanism fixed wheel, the three-point straightening mechanism elbow and the left clamping fixed wheel and the left clamping movable wheel are all fixed at corresponding positions by bolts.

[0017] The beneficial effects of the utility model are:

[0018] The coiled tubing of the utility model is clamped by the straightening mechanism and the three-point straightening mechanism and is straightened by the thrust of the straightening cylinder. The bent coiled tubing is quickly straightened by the movement of the traveling wheel system, which saves time and effort, effectively reduces the labor intensity of the operators, shortens the operation cycle, and provides a guarantee for the butt welding service of the coiled tubing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a straightening device for coiled tubing according to the present invention;

[0020] Figure 2 yes Figure 1 A top view of

[0021] Figure 3 This is a structural diagram of a straightening main unit in a straightening device for coiled tubing according to the present invention;

[0022] Figure 4 This is a front view of the straightening main unit in the straightening device for coiled tubing of the utility model;

[0023] Figure 5 yes Figure 4 A top view of

[0024] Figure 6 yes Figure 4 Left view of .

[0025] In the figure: 1. Coiled tubing, 2. Straightening machine, 3. Underframe, 4. Straightening mechanism;

[0026] 201. Main frame, 202. Right clamping wheel pair, 20201. Right clamping cylinder, 20202. Right clamping fixed wheel, 20203. Right clamping movable wheel, 20204. Fixed frame, 20405. Movable frame A, 203. Three-point straightening mechanism, 20301. Three-point straightening mechanism fixed wheel, 20302. Three-point straightening mechanism cylinder, 20303. Three-point straightening mechanism elbow, 20304. Fixed frame B, 204. Left clamping wheel pair, 20401. Left clamping fixed wheel, 20402. Left clamping cylinder, 20 403. Left clamping movable wheel, 20404. Fixed frame A, 20405. Movable frame A, 205. Operating valve body, 20501. Right clamping cylinder extension and retraction control valve body, 20502. Three-point straightening mechanism cylinder extension and retraction control valve body, 20503. Left clamping cylinder extension and retraction control valve body, 20504. Travel motor drive control valve body, 206. Travel wheel train, 20601. Follower shaft wheel, 20602. Travel motor, 20603. Drive chain, 20604. Drive shaft wheel, 207. Bolt. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] Example 1

[0029] The utility model is used for a straightening device for a continuous oil pipe, and its structure is as follows Figure 1-2 As shown, it includes a base frame 3, on which a straightening main machine 2 is slidably mounted. A straightening mechanism 4 is also provided on one side of the base frame 3. The straightening mechanism 4 and the straightening main machine 2 are located on the same axis. The coiled tubing 1 passes through the straightening main machine 2 and the straightening mechanism 4. The straightening main machine 2 slides left and right on the base frame 3 along the straightening direction of the coiled tubing 1.

[0030] On the basis of Example 1, at least two grooved tracks distributed along the straightening direction of the coiled tubing 1 are provided on the chassis 3, and a traveling wheel train 206 is provided at the position corresponding to the grooved track at the bottom of the straightening main machine 2, and the traveling wheel train 206 rolls in the corresponding grooved track.

[0031] In this embodiment, when the coiled tubing 1 passes through the straightening main unit 2 and the straightening mechanism 4 for straightening operation, the chassis 3 is first placed on the ground, and then the straightening main unit 2 is placed in the grooved track of the chassis 3. The straightening mechanism 4 and the chassis 3 are connected together with bolts 207. Then, the bent coiled tubing 1 is passed through the end of the straightening mechanism 4 and extended into the straightening main unit 2. The straightening main unit 2 can move in the grooved track of the chassis 3 to quickly straighten the coiled tubing 1. During the straightening process, the straightening mechanism can play a supporting and leveling role.

[0032] Example 2

[0033] On the basis of Example 1, Figure 3-6 As shown, the straightening main machine 2 includes a main frame 201, and a traveling wheel train 206 is fixedly connected to the position of the grooved track at the bottom of the main frame 201. A right clamping wheel pair 202, a three-point straightening mechanism 203, and a left clamping wheel pair 204 are arranged in sequence above the main frame 201 along the straightening direction of the coiled tubing 1. 205 is also provided on the main frame 201. The operating valve body 205 drives the right clamping wheel pair 202, the three-point straightening mechanism 203, the left clamping wheel pair 204 and the traveling wheel train 206. The coiled tubing 1 passes through the right clamping wheel pair 202, the three-point straightening mechanism 203, and the left clamping wheel pair 204.

[0034] The right clamping wheel pair 202 includes a right clamping cylinder 20201 and a right clamping fixed wheel 20202, which are arranged on both sides of the coiled tubing 1. A right clamping movable wheel 20203 is fixed to the right clamping cylinder 20201. The right clamping movable wheel 20203 and the right clamping fixed wheel 20202 are correspondingly arranged on both sides of the coiled tubing 1. The operating valve body 205 drives the right clamping cylinder 20201 to extend and retract, thereby moving the right clamping movable wheel 20203 toward or away from the right clamping fixed wheel 20202, thereby clamping or releasing the coiled tubing 1.

[0035] The left clamping wheel pair 204 includes a left clamping fixed wheel 20401 and a left clamping cylinder 20402. A left clamping movable wheel 20403 is fixed on the left clamping cylinder 20402. The left clamping movable wheel 20403 and the left clamping fixed wheel 20401 are correspondingly arranged on both sides of the coiled tubing 1. The operating valve body 205 drives the extension and retraction of the left clamping cylinder 20402 to realize the movement of the left clamping movable wheel 20403 toward or away from the left clamping fixed wheel 20401, thereby realizing the clamping or release of the coiled tubing 1.

[0036] A fixed frame 20204 is fixed to the upper surface of the main frame 201, and the right clamping fixed wheel 20202 is rotatably fixed to the fixed frame 20204. A movable frame 20205 is fixed to the right clamping oil cylinder 20201, and the right clamping movable wheel 20203 is fixed to the movable frame 20205. The wheel surfaces of the right clamping movable wheel 20203 and the right clamping fixed wheel 20202 are arranged correspondingly. When the right clamping oil cylinder 20201 drives the right clamping movable wheel 2203 and the right clamping fixed wheel 2202 to approach each other for clamping, the wheel surfaces of the right clamping movable wheel 20203 and the right clamping fixed wheel 20202 clamp and squeeze the coiled tubing 1.

[0037] A fixed frame A20404 is fixed on the upper surface of the main frame 201, the left clamping fixed wheel 20401 is rotatably fixed on the fixed frame A20404, a movable frame A20405 is fixed on the left clamping cylinder 20402, the left clamping movable wheel 20403 is fixed on the movable frame A20405, the wheel surfaces of the left clamping movable wheel 20403 and the left clamping fixed wheel 20401 are arranged correspondingly, when the left clamping cylinder 20402 drives the left clamping movable wheel 20403 and the left clamping fixed wheel 20401 to approach for clamping, the wheel surfaces of the left clamping movable wheel 20403 and the left clamping fixed wheel 20401 clamp and squeeze the continuous oil pipe 1.

[0038] The three-point straightening mechanism 203 includes two three-point straightening mechanism fixed wheels 20301 arranged between the right clamping fixed wheel 20202 and the left clamping fixed wheel 20401. The two three-point straightening mechanism fixed wheels 20301 are located on the same side of the coiled tubing 1. A three-point straightening mechanism oil cylinder 20302 is arranged between the two three-point straightening mechanism fixed wheels 20301. A three-point straightening mechanism elbow 20303 is fixed to the protruding end of the three-point straightening mechanism oil cylinder 20302. The three-point straightening mechanism elbow 20303 is located on the coiled tubing. 1 is located on a side away from the fixed wheel 20301 of the three-point straightening mechanism, and the side of the three-point straightening mechanism elbow 20303 facing the coiled tubing 1 is configured to have a protruding arc surface toward the coiled tubing 1. The operating valve body 205 drives the extension and retraction of the three-point straightening mechanism oil cylinder 20302. When the three-point straightening mechanism oil cylinder 20302 drives the three-point straightening mechanism elbow 20303 to extend, the three-point straightening mechanism elbow 20303 and the wheel surfaces of the two three-point straightening mechanism fixed wheels 20301 cooperate to clamp and squeeze the coiled tubing 1.

[0039] The fixed wheel 20301 of the three-point straightening mechanism is rotatably fixed on the main frame 201 through the fixing frame B20304, and the fixing frame B20304 is fixed on the main frame 201 through bolts 207.

[0040] The three-point straightening mechanism cylinder 20302 is connected to the three-point straightening mechanism elbow 20303 through bolts 207. Under the control of the three-point straightening mechanism cylinder extension and retraction control valve body 20502, the three-point straightening mechanism cylinder 20302 can achieve forward and backward movements. At the same time, the three-point straightening mechanism elbow 20303 will hold the bent coiled tubing 1 until it contacts two sets of three-point straightening mechanism fixed wheels 20301. The three-point straightening principle is used to straighten the coiled tubing 1. The holding is maintained for about 3 minutes before releasing the three-point straightening mechanism cylinder 20302.

[0041] The right clamping and fixing wheel 20202, the three-point straightening mechanism fixing wheel 20301, and the left clamping and fixing wheel 20401 are arranged in a row on the same straight line, and the three-point straightening mechanism fixing wheel 20301 is fixed to the main frame 201 through a fixing frame B20304.

[0042] The traveling wheel system 206 includes a follower shaft wheel 20601 rotatably fixed on one side of the bottom of the main frame 201, and a driving shaft wheel 20604 rotatably fixed on the other side of the bottom of the main frame 201. A traveling motor 20602 is also fixed on the bottom of the main frame 201. The traveling motor 20602 is connected to the driving shaft wheel 20604 through a driving chain 20603. Both the driving shaft wheel 20604 and the follower shaft wheel 20601 roll in the grooved track of the base frame 3, and the operating valve body 205 drives the traveling motor 20602.

[0043] The operating valve body 205 includes a right clamping cylinder extension and retraction control valve body 20501, a three-point straightening mechanism cylinder extension and retraction control valve body 20502, a left clamping cylinder extension and retraction control valve body 20503 and a travel motor drive control valve body 20504. The right clamping cylinder extension and retraction control valve body 20501, the three-point straightening mechanism cylinder extension and retraction control valve body 20502, the left clamping cylinder extension and retraction control valve body 20503 and the travel motor drive control valve body 20504 respectively control the right clamping cylinder 20201, the three-point straightening mechanism cylinder 20302, the left clamping cylinder 20402 and the travel motor 20602. Under the control of the travel motor drive control valve body 20504, the travel motor 20602 drives the shaft wheel 20604 to move the straightening main unit 2 left and right on the base frame 3.

[0044] The working principle of this embodiment is as follows:

[0045] First, place the coiled tubing 1 from the end of the straightening mechanism 4 into the straightening main unit 2, and operate the left clamping cylinder to extend and retract the control valve body 20503 to extend the left clamping cylinder 20402 until the coiled tubing 1 contacts the left clamping fixed wheel 20401, and then operate the three-point straightening mechanism cylinder to extend and retract the control valve body 20502 to control the three-point straightening mechanism cylinder 20302 to extend, and at the same time, the three-point straightening mechanism elbow 20303 will support the bent coiled tubing 1 until the two sets of three-point straightening mechanism fixed wheels 20301, and keep it supported for 3 minutes. The bent coiled tubing 1 will be straightened using the three-point straightening principle, and then the three-point straightening mechanism cylinder 20302 will be retracted, and the travel motor drive control valve body 20504 will be operated to control the straightening main unit 2 to move left and right under the drive of the travel wheel system 206, thereby quickly straightening the bent coiled tubing 1.

[0046] Example 3

[0047] On the basis of Example 2, the right clamping fixed wheel 20202, the right clamping movable wheel 20203, the three-point straightening mechanism fixed wheel 20301, the three-point straightening mechanism elbow 20303 and the left clamping fixed wheel 20401, the left clamping movable wheel 20403 are all fixed at corresponding positions by bolts 207. For straightening operations on continuous oil pipes 1 of different diameters, the bolts 207 can be removed and replaced for the right clamping fixed wheel 20202, the three-point straightening mechanism fixed wheel 20301, the three-point straightening mechanism elbow 20303 and the left clamping fixed wheel 20401 in the straightening main machine 2.

[0048] The utility model effectively improves the straightening efficiency of the coiled tubing, reducing the manual straightening time from 8 hours to 2 hours, thereby reducing the working intensity of the operators and shortening the operation cycle.

Claims

1. A straightening device for coiled tubing, characterized in that: The invention comprises a base frame (3), a straightening main machine (2) is slidably mounted on the base frame (3), a straightening mechanism (4) is further provided on one side of the base frame (3), the straightening mechanism (4) and the straightening main machine (2) are located on the same axis, the coiled tubing (1) passes through the straightening main machine (2) and the straightening mechanism (4), and the straightening main machine (2) slides left and right on the base frame (3) along the straightening direction of the coiled tubing (1).

2. The straightening device for coiled tubing according to claim 1, characterized in that: The chassis (3) is provided with at least two grooved tracks distributed along the straightening direction of the coiled tubing (1); a running wheel train (206) is provided at a position on the bottom of the straightening main machine (2) corresponding to the grooved tracks; the running wheel train (206) rolls in the corresponding grooved tracks.

3. The straightening device for coiled tubing according to claim 1 or 2, characterized in that: The straightening main machine (2) comprises a main frame (201), a travel wheel train (206) is fixedly connected to a position of a grooved track at the bottom of the main frame (201), a right clamping wheel pair (202), a three-point straightening mechanism (203), and a left clamping wheel pair (204) are sequentially arranged above the main frame (201) along the straightening direction of the continuous oil pipe (1), and a (205) is further arranged on the main frame (201). The operating valve body (205) drives the right clamping wheel pair (202), the three-point straightening mechanism (203), the left clamping wheel pair (204) and the travel wheel train (206), and the continuous oil pipe (1) passes through the right clamping wheel pair (202), the three-point straightening mechanism (203), and the left clamping wheel pair (204).

4. The straightening device for coiled tubing according to claim 3, characterized in that: The right clamping wheel pair (202) comprises a right clamping oil cylinder (20201) and a right clamping fixed wheel (20202) arranged on both sides of the continuous oil pipe (1); a right clamping movable wheel (20203) is fixed on the right clamping oil cylinder (20201); the right clamping movable wheel (20203) and the right clamping fixed wheel (20202) are correspondingly arranged on both sides of the continuous oil pipe (1); the operating valve body (205) drives the right clamping oil cylinder (20201) to extend and retract, so as to realize the movement of the right clamping movable wheel (20203) toward or away from the right clamping fixed wheel (20202), thereby realizing the clamping or loosening of the continuous oil pipe (1); The left clamping wheel pair (204) comprises a left clamping fixed wheel (20401) and a left clamping oil cylinder (20402), a left clamping movable wheel (20403) being fixed on the left clamping oil cylinder (20402), the left clamping movable wheel (20403) and the left clamping fixed wheel (20401) being correspondingly arranged on both sides of the continuous oil pipe (1), and the operating valve body (205) drives the left clamping oil cylinder (20402) to extend and retract, thereby enabling the left clamping movable wheel (20403) to move toward or away from the left clamping fixed wheel (20401), thereby achieving the clamping or loosening of the continuous oil pipe (1).

5. The straightening device for coiled tubing according to claim 4, characterized in that: A fixed frame (20204) is fixed on the upper surface of the main frame (201), the right clamping fixed wheel (20202) is rotatably fixed on the fixed frame (20204), a movable frame (20205) is fixed on the right clamping oil cylinder (20201), the right clamping movable wheel (20203) is fixed on the movable frame (20205), the wheel surfaces of the right clamping movable wheel (20203) and the right clamping fixed wheel (20202) are arranged correspondingly, and when the right clamping oil cylinder (20201) drives the right clamping movable wheel (20203) and the right clamping fixed wheel (20202) to approach and clamp, the wheel surfaces of the right clamping movable wheel (20203) and the right clamping fixed wheel (20202) clamp and extrude the continuous oil pipe (1); A fixed frame A (20404) is fixed on the upper surface of the main frame (201), the left clamping fixed wheel (20401) is rotatably fixed on the fixed frame A (20404), a movable frame A (20405) is fixed on the left clamping oil cylinder (20402), the left clamping movable wheel (20403) is fixed on the movable frame A (20405), the wheel surfaces of the left clamping movable wheel (20403) and the left clamping fixed wheel (20401) are correspondingly arranged, and when the left clamping oil cylinder (20402) drives the left clamping movable wheel (20403) and the left clamping fixed wheel (20401) to approach and clamp, the wheel surfaces of the left clamping movable wheel (20403) and the left clamping fixed wheel (20401) clamp and extrude the continuous oil pipe (1).

6. The straightening device for coiled tubing according to claim 5, characterized in that: The three-point straightening mechanism (203) comprises two three-point straightening mechanism fixing wheels (20301) arranged between the right clamping fixing wheel (20202) and the left clamping fixing wheel (20401), and the two three-point straightening mechanism fixing wheels (20301) are located on the same side of the coiled tubing (1); a three-point straightening mechanism oil cylinder (20302) is arranged between the two three-point straightening mechanism fixing wheels (20301), a three-point straightening mechanism elbow (20303) is fixed to the protruding end of the three-point straightening mechanism oil cylinder (20302), and the three-point straightening mechanism elbow (20303) is located on the coiled tubing. (1) On the side away from the fixed wheel (20301) of the three-point straightening mechanism, the elbow (20303) of the three-point straightening mechanism is arranged to have a protruding arc surface toward the direction of the continuous oil pipe (1) on the side close to the continuous oil pipe (1), and the operating valve body (205) drives the extension and retraction of the three-point straightening mechanism oil cylinder (20302). When the three-point straightening mechanism oil cylinder (20302) drives the elbow (20303) of the three-point straightening mechanism to extend, the wheel surfaces of the elbow (20303) of the three-point straightening mechanism and the two fixed wheels (20301) of the three-point straightening mechanism cooperate to achieve clamping and squeezing of the continuous oil pipe (1).

7. The straightening device for coiled tubing according to claim 6, characterized in that: The right clamping and fixing wheel (20202), the three-point straightening mechanism fixing wheel (20301), and the left clamping and fixing wheel (20401) are arranged in a row on the same straight line, and the three-point straightening mechanism fixing wheel (20301) is fixed to the main frame (201) via a fixing frame B (20304).

8. The straightening device for coiled tubing according to claim 7, characterized in that: The travel wheel system (206) includes a follower shaft wheel (20601) rotatably fixed to one side of the bottom of the main frame (201), a driving shaft wheel (20604) rotatably fixed to the other side of the bottom of the main frame (201), and a travel motor (20602) is also fixed to the bottom of the main frame (201). The travel motor (20602) is connected to the driving shaft wheel (20604) through a drive chain (20603). Both the driving shaft wheel (20604) and the follower shaft wheel (20601) roll in the grooved track of the base frame (3), and the operating valve body (205) drives the travel motor (20602).

9. The straightening device for coiled tubing according to claim 8, characterized in that: The operating valve body (205) includes a right clamping cylinder extension and retraction control valve body (20501), a three-point straightening mechanism cylinder extension and retraction control valve body (20502), a left clamping cylinder extension and retraction control valve body (20503) and a travel motor drive control valve body (20504). The right clamping cylinder extension and retraction control valve body (20501), the three-point straightening mechanism cylinder extension and retraction control valve body (20502), the left clamping cylinder extension and retraction control valve body (20503) and the travel motor drive control valve body (20504) respectively control the right clamping cylinder (20201), the three-point straightening mechanism cylinder (20302), the left clamping cylinder (20402), and the travel motor (20602).

10. The straightening device for coiled tubing according to claim 8, characterized in that: The right clamping fixed wheel (20202), the right clamping movable wheel (20203), the three-point straightening mechanism fixed wheel (20301), the three-point straightening mechanism elbow (20303), the left clamping fixed wheel (20401), and the left clamping movable wheel (20403) are all fixed at corresponding positions by bolts (207).

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