Calibrating and righting device for anti-eccentric-wear oil pipe

Abstract

The invention discloses an anti-eccentric-wear oil pipe calibrating and righting device, and particularly relates to the technical field of oil extraction well equipment. A centering unit is arranged, a barrel sleeve is arranged on the outer wall of a shaft in a sleeving mode, center alignment operation does not need to be completed in advance, and the device can be triggered to be started only by making at least one contact wheel make contact with the outer wall of the shaft; a first driving piece drives a lower gear to rotate through a first motor, a lower fluted disc is in linkage with a plurality of first bevel gears, a first lead screw is driven to rotate, and then a fixing base and a contact wheel are pushed to synchronously stretch out in the radial direction, so that a sleeve and a shaft are automatically centered, centering positioning is completed, and automatic driving logic is triggered through at least one contact point. The traditional manual aligning and centering process is avoided, and the initial eccentric state of the sleeve in the mounting process is corrected through multi-point symmetrical supporting of the contact wheel; the driving unit drives the righting unit to act, it is ensured that the anti-eccentric-wear oil pipe is guided and calibrated in a centered reference environment, and the righting precision and the overall stability of the device are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil extraction well equipment, in particular to a deviation-preventing oil pipe calibration and centralizing device. BACKGROUND

[0002] In the process of oil and gas exploitation, oil pipes are widely used in the operation of oil pumping, water injection, well logging and well repair, as an important part of downhole operation. Due to the complex downhole environment, especially in deviated wells, horizontal wells, deep wells and ultra-deep wells, the oil pipes are prone to be subjected to friction or uneven force of the well wall, resulting in deviation and wear. Deviation and wear not only lead to the thinning of the wall thickness of the oil pipes and the reduction of the structural strength, but also cause serious accidents such as leakage or rupture, and affect the safe and stable operation of the entire production system. In order to reduce the deviation and wear, a centralizer is usually used to fix the oil pipes at the center of the wellbore, so as to reduce the direct contact with the well wall.

[0003] According to the search, the invention patent with the publication number CN116856866B discloses a deviation-preventing device and method for a sucker rod. When the lifting motor stops moving, the centralizing sleeve is fixed at the bending part of the sucker rod body, and the movable ball is in contact with the oil pipe at the deviation and wear part, greatly reducing the friction between the sucker rod body and the oil pipe.

[0004] In the prior art, the downhole centralizing device usually needs to be strictly aligned with the center axis of the wellbore during installation, and relies on manual calibration operation by the field operation personnel. However, due to the actual conditions such as the deviation, bending or space limitation of the wellbore itself, manual centering is not only tedious and low in efficiency, but also requires high experience of the operation personnel, often leading to large positioning error and poor centering accuracy. In addition, in the initial installation state, there is usually obvious eccentricity between the sleeve and the wellbore, which is difficult to achieve high-precision automatic centering positioning by manual means, further affecting the subsequent centralizing effect and the running stability of the oil pipe. SUMMARY

[0005] The present application provides a deviation-preventing oil pipe calibration and centralizing device to solve the problems mentioned in the background.

[0006] The technical problem solved by the present application is: In the prior art, due to the actual conditions such as the deviation, bending or space limitation of the wellbore itself, manual centering is not only tedious and low in efficiency, but also requires high experience of the operation personnel, often leading to large positioning error and poor centering accuracy. In the initial installation state, there is usually obvious eccentricity between the sleeve and the wellbore, which is difficult to achieve high-precision automatic centering positioning by manual means.

[0007] The present application can be achieved by the following technical solutions: The application discloses a kind of anti-eccentric wear oil pipe calibration righting device, including embedded in the inside of oil production well shaft, the outer sleeve of the shaft is connected with the sleeve for the righting of anti-eccentric wear oil pipe, the bottom of the sleeve is equipped with the centering unit aligned with the center of shaft; The centering unit includes a ring frame fixedly arranged on the bottom of the sleeve, a lower gear disc is rotatably arranged inside the ring frame, and a plurality of bevel gears I are arranged below the ring frame and engaged with the lower gear disc. Each bevel gear I is rotatably installed on the outer wall of the sleeve through a bearing seat, and a lead screw I is threadedly connected inside each bevel gear I. One end of each lead screw I extending into the sleeve is fixedly connected with a fixed seat, and a contact wheel closely fitted with the outer wall of the top of the shaft is rotatably installed on the inner wall of the fixed seat. The rotation center of the contact wheel is installed in the fixed seat through a shaft pin, and the contact wheel rotates around a horizontal axis. Both sides of each lead screw I are provided with sliding rods slidingly matched with the sleeve, and one end of the sliding rod extending into the sleeve is fixed with the fixed seat. The top of the sleeve is provided with a righting unit for calibrating the anti-eccentric wear oil pipe. The upper side of the ring frame is provided with a driving unit for driving the centering unit and the righting unit to work alternately. The driving unit first drives the centering unit to keep the position of the sleeve and the shaft centered. Then, the righting unit is driven to work by the driving unit to calibrate and right the anti-eccentric wear oil pipe.

[0008] Further technical improvements of the application are that the driving unit includes a fixed plate fixedly arranged on the outer wall of one side of the sleeve. One end of the top surface of the fixed plate is slidingly provided with a driving member II for cooperation with the righting unit. The other end of the bottom surface of the fixed plate is slidingly provided with a driving member I for cooperation with the centering unit. The sliding directions of the driving member I and the driving member II are opposite.

[0009] Further technical improvements of the application are that one end of the top surface of the fixed plate is provided with an upper guide groove in strip structure, and a limiting seat I is limitingly and slidingly arranged inside the upper guide groove. A intermediate gear driven by a servo motor is arranged in the groove cavity of the middle part of the bottom surface of the fixed plate. The other end of the bottom surface of the fixed plate is provided with a lower guide groove, and a limiting seat II is limitingly and slidingly arranged inside the lower guide groove. A rack engaged with the intermediate gear is arranged on the surface of the limiting seat I and the limiting seat II. The lower guide groove and the upper guide groove are parallel and do not intersect, and neither of them is throughly arranged.

[0010] The further technical improvement of the present application is that the driving member one comprises a lower gear driven by the motor one, which is arranged in mesh with the outer wall of the lower tooth disc.

[0011] The further technical improvement of the present application is that the centralizing unit comprises a ring seat arranged on the top end of the sleeve, and a plurality of turnover frames are arranged on the inner wall surface of the ring seat in rotation.

[0012] The further technical improvement of the present application is that the surface of the ring seat is provided with a plurality of sliding grooves, and a lead screw two is arranged in rotation in the inside of each sliding groove, a sliding block is sleeved in the internal thread of the lead screw two in limiting sliding along the corresponding sliding groove, and a transmission rod is hinged to the upper end of the sliding block, and the end of the transmission rod is hinged to the turnover frame.

[0013] The further technical improvement of the present application is that the outside of one end of the lead screw two close to the edge of the ring seat is fixed with a bevel gear two. An upper tooth disc is arranged in rotation below the ring seat. The driving member two comprises an upper gear driven by the motor two and arranged in mesh with the upper tooth disc. The upper part of the upper tooth disc is arranged in mesh with the bevel gear two.

[0014] The further technical improvement of the present application is that two damping bearings are arranged on the sleeve. The damping bearings are arranged respectively at the top outer wall of the sleeve and the inner cavity position of the ring frame, the upper damping bearing is connected with the upper tooth disc, and the lower damping bearing is connected with the lower tooth disc.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. By arranging the centering unit, the sleeve is sleeved on the outer wall of the wellbore, without the need of completing the centering operation in advance, only the contact with the outer wall of the wellbore by at least one contact wheel can trigger the start of the device, the driving member one drives the lower gear to rotate through the motor one, and the lead screw one is driven to rotate through the linkage of the lower tooth disc and a plurality of bevel gears one, so as to push the fixed seat and the contact wheel to extend synchronously in the radial direction, so that the sleeve is automatically centered with the wellbore, the centering and positioning are completed, the automatic driving logic triggered by at least one contact point avoids the traditional manual centering and aligning process, and the initial eccentric state of the sleeve in the installation process is corrected through the multi-point symmetrical support of the contact wheel; the driving of the driving unit drives the action of the centralizing unit, so as to ensure that the anti-abrasion oil pipe is guided and calibrated in a centered reference environment, and the centralizing precision and the overall stability of the device are effectively improved. 2. By setting the right unit, since the sleeve center has been aligned with the wellbore center, the turnover frame is symmetrically arranged around the sleeve center, the driving part two is started, the motor two drives the upper gear to rotate the upper tooth disc, the plurality of bevel gears two drives the lead screw two to rotate, drives the sliding block to slide along the corresponding sliding groove, pushes the connected transmission rod and the turnover frame to rotate synchronously, the plurality of turnover frames are synchronously turned towards the wellbore center, the top pulley is fitted with the anti-deviation wear-resistant oil pipe from the outside to the inside, the symmetric righting and guiding is realized, the anti-deviation wear-resistant oil pipe axis is helped to gradually close to the wellbore center, so that the eccentric state is effectively eliminated, and the stress balance and the anti-deviation wear-resistant capacity during the oil pipe operation are improved; 3. By setting the driving part one and the driving part two sliding in opposite directions, the overall action relies on the upper guide groove, the lower guide groove, the limiting seat one and the limiting seat two distributed in the fixed plate, the centering unit and the righting unit are driven at different times, the sequential action of the centering unit and the righting unit is accurately controlled, and the interference and mislinking during coaxial driving are effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to facilitate those skilled in the art to understand, the present application is further described below in combination with the drawings.

[0017] Figure 1 It is an external structure schematic diagram of the present application; Figure 2 It is the present application Figure 1 A local enlarged view at the place A in the present application; Figure 3 It is a local enlarged view at the place B in the present application; Figure 1 Figure 4 It is an installation structure schematic diagram of the intermediate gear and the limiting seat two and the limiting seat one in the present application; Figure 5 It is a top installation structure schematic diagram of the fixed seat and the sleeve in the present application; Figure 6 It is an installation structure schematic diagram of the upper tooth disc and the bevel gear two in the present application.

[0018] In the drawing: 1, wellbore; 2, sleeve; 3, fixed plate; 4, upper guide groove; 5, lower gear; 6, ring frame; 7, lower tooth disc; 8, lead screw one; 9, sliding rod; 10, bevel gear one; 11, limiting seat one; 12, intermediate gear; 13, lower guide groove; 14, ring seat; 15, sliding groove; 16, sliding block; 17, transmission rod; 18, turnover frame; 19, pulley; 20, upper gear; 21, upper tooth disc; 22, bevel gear two; 23, lead screw two; 24, damping bearing; 25, fixed seat; 26, contact wheel; 27, limiting seat two. DETAILED DESCRIPTION

[0019] ​In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object of the present application, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0020] As shown in Figures 1-6 As shown in The centering unit comprises a ring frame 6 fixedly arranged on the bottom of the sleeve 2, a lower tooth disc 7 rotatably arranged inside the ring frame 6, and a plurality of bevel gears I 10 arranged below the ring frame 6 and engaged with the lower tooth disc 7, wherein adjacent two bevel gears I 10 are arranged vertically. Each bevel gear I 10 is rotatably installed on the outer wall surface of the sleeve 2 through a bearing seat, and a lead screw I 8 is threadedly sleeved inside each bevel gear I 10. The inner wall surface of each fixed seat 25 is rotatably installed with a contact wheel 26 closely fitted with the outer wall surface of the top of the wellbore 1. The rotation center of the contact wheel 26 is installed in the fixed seat 25 through a shaft pin, and the contact wheel 26 rotates around the horizontal direction axis. Each lead screw I 8 is provided with a sliding rod 9 slidingly matched with the sleeve 2 on both sides, and one end of the sliding rod 9 extending into the sleeve 2 is fixed with the fixed seat 25. The top of the sleeve 2 is provided with a righting unit for calibrating the anti-deviation oil pipe. The upper side of the ring frame 6 is provided with a driving unit for driving the centering unit and the righting unit to work alternately. The driving unit first drives the centering unit to keep the position of the sleeve 2 and the wellbore 1 centered and installed. Then, the righting unit is driven to work by the driving unit to calibrate and right the anti-deviation oil pipe. As shown in Figure 1 and Figure 5 The sleeve 2 is sleeved on the outer wall of the wellbore 1, without the need for prior centering operation, and only needs to make at least one contact wheel 26 contact the outer wall of the wellbore 1 to form preliminary positioning. When the remaining contact wheels 26 have not contacted the outer wall of the wellbore 1, the driving unit is started to drive the centering unit to work. During the driving process, the lower tooth disc 7 rotates in the ring frame 6, and then drives the corresponding lead screw I 8 to rotate synchronously through the engagement of the plurality of bevel gears I 10, and since the lead screw I 8 is threadedly sleeved with the bevel gear I 10, the rotation movement will be converted into axial movement, pushing the fixed seat 25 to extend along the radial direction. And each fixed seat 25 is in sliding fit with the sleeve 2 through the slide rod 9, ensuring limited position, smooth movement and synchronous advancement during radial extension; When the screw rod 8 is axially advanced, the fixed seat 25 connected at one end thereof is pushed to approach the wellbore 1 in the radial direction, and the contact wheel 26 on the fixed seat 25 is gradually attached to the outer wall surface of the wellbore 1, realizing synchronous attachment of multiple contact points and thereby achieving automatic centering of the sleeve 2 relative to the wellbore 1; The contact wheel 26 is freely rotatable about the horizontal axis, thereby allowing slight relative displacement with the wellbore 1 while ensuring stable attachment, and the sleeve 2 is adaptively adjusted during slight movement, reducing friction and wear, and the spatial symmetrical arrangement of the four sets of contact wheels 26 enables high-precision automatic centering adjustment of the sleeve 2 relative to the wellbore 1; The automatic driving logic triggered through at least one contact point avoids the traditional manual centering process, improves the automation level and field adaptability of the device, and is suitable for high-precision self-centering in space-limited or offset initial installation environments; Through linkage of multiple screw rods 8, the multiple-point symmetrical support of the contact wheel 26 is controlled to correct the initial eccentric state of the sleeve 2 during installation; After centering is completed, the driving unit continues to act, starting the centralizing unit provided at the top of the sleeve 2; The centralizing unit is attached to the outer wall of the anti-deviation wear-resistant oil pipe, and through synchronous advancement, attachment and limiting actions, the central axis of the anti-deviation wear-resistant oil pipe is gradually guided to approach the central axis of the wellbore 1, thereby achieving accurate calibration and centralizing effect.

[0021] Referring to Figure 2 , the driving unit includes a fixed plate 3 fixedly provided on the outer wall surface of one side of the sleeve 2; The top surface of the fixed plate 3 has a driving member two slidably provided at one end thereof for cooperation with the centralizing unit; The bottom surface of the fixed plate 3 has a driving member one slidably provided at the other end thereof for cooperation with the centering unit; The sliding directions of the driving member one and the driving member two are opposite; By dividing the driving member one and the driving member two and arranging them on the upper and lower sides of the fixed plate 3 and designing them to slide in opposite directions, phased control of the centering unit and the centralizing unit is realized, interference and misoperation during driving are avoided, the response speed, movement stability and control logic clarity of the overall device are improved, and high-reliability automatic calibration of the anti-deviation wear-resistant device is facilitated.

[0022] Referring to Figure 2 , one end of the top surface of the fixed plate 3 is provided with an upper guide groove 4 in strip structure, and a limiting seat one 11 is limitingly and slidably arranged in the upper guide groove 4; An intermediate gear 12 driven by a servo motor is arranged in the slot cavity of the middle part of the bottom surface of the fixed plate 3; The bottom surface of the fixed plate 3 is provided with a lower guide groove 13, and the inside of the lower guide groove 13 is provided with a limiting seat two 27; The surfaces of the limiting seat one 11 and the limiting seat two 27 are provided with a rack which is engaged with the intermediate gear 12; The lower guide groove 13 is parallel to the upper guide groove 4 and does not intersect, and neither of them is provided with a through hole; The upper guide groove 4 and the lower guide groove 13 are arranged in an up-down manner, the intermediate gear 12 is driven to rotate by the servo motor output, the limiting seat one 11 and the limiting seat two 27 are synchronously driven to slide in opposite directions, and are limited in the corresponding upper guide groove 4 and lower guide groove 13; When the driving part one slides towards the lower tooth disc 7, the centering unit works at this time, and the righting unit does not work; When the driving part one reversely slides, the driving part two cooperates with the righting unit, and can drive the centering unit and the righting unit to act in time, accurately controls the sequential action of the centering unit and the righting unit, and effectively avoids the interference and misoperation when driving coaxially.

[0023] Referring to Figure 2 As shown in the figure, the driving part one includes a lower gear 5 driven by a motor one, and the lower gear 5 is engaged with the outer wall of the lower tooth disc 7; When the driving part one slides along the lower guide groove 13 to the predetermined position, the lower tooth disc 7 is synchronously rotated by the rotation of the lower gear 5, so as to drive the centering unit to act.

[0024] Referring to Figure 3 As shown in the figure, the righting unit includes a ring seat 14 provided on the top end of the cylinder sleeve 2, and a plurality of turnover frames 18 are rotationally arranged on the inner wall surface of the ring seat 14; The turnover frames 18 are symmetrically arranged around the center of the cylinder sleeve 2; The plurality of turnover frames 18 are subjected to the sliding of the corresponding sliding blocks 16, are simultaneously rotated, realize the synchronous opening and closing action of the righting unit, and the rotation direction of the turnover frames 18 is towards the center of the cylinder sleeve 2; So that the pulleys 19 in the U-shaped groove at the top thereof are close to the anti-deviation wear-resistant oil pipe from outside to inside in the turnover process, realize the active close contact and the annular righting, realize the functions of multi-point synchronous turnover, inward righting and close contact under the driving control, so as to improve the calibration accuracy and close contact stability of the anti-deviation wear-resistant oil pipe axis.

[0025] Referring to Figure 3 And Figure 6 As shown in the figure, the surface of the ring seat 14 is provided with a plurality of sliding grooves 15, a lead screw two 23 is rotationally arranged in each sliding groove 15, the sliding block 16 which is limited to slide along the corresponding sliding groove 15 is threadedly connected in the lead screw two 23, the transmission rod 17 is hingedly connected to the upper end of the sliding block 16, and the end of the transmission rod 17 is hingedly connected with the turnover frame 18. The bevel gear two 22 is fixed outside the end of the edge of the ring seat 14; The upper tooth disc 21 is rotatably arranged below the ring seat 14; The driving part two comprises the upper gear 20 driven by the motor two and arranged in mesh with the upper tooth disc 21; The upper part of the upper tooth disc 21 is arranged in mesh with the bevel gear two 22; The cylinder sleeve 2 is provided with two damping bearings 24; The damping bearings 24 are arranged at the top outer wall of the cylinder sleeve 2 and the inner cavity position of the ring frame 6 respectively, the upper damping bearing 24 is connected with the upper tooth disc 21, and the lower damping bearing 24 is connected with the lower tooth disc 7, so that the stable rotation of the upper tooth disc 21 and the lower tooth disc 7 is ensured, appropriate damping is provided, rotation overshoot or inertial sliding is prevented, and the overall control precision is improved; The motor two drives the upper tooth disc 21 to rotate through the upper gear 20, and then drives each screw rod two 23 to rotate synchronously through the bevel gear two 22, and the plurality of sliding blocks 16 slide synchronously under the driving of the synchronous rotation of the screw rod two 23, with the linear movement of the sliding block 16, the rotating frame 18 rotates around the rotating shaft, so that the plurality of rotating frames 18 rotate synchronously around the respective hinge points and towards the center of the cylinder sleeve 2; The rotating action makes the pulley 19 in the U-shaped groove at the top of each rotating frame 18 abut to the outer wall of the anti-deviation wear-resistant oil pipe from outside to inside, realizes the simultaneous righting and guiding of multiple points, improves the oil pipe axis alignment precision, ensures that the action direction of each abutting point is consistent with the response timing, and avoids load deviation or structural interference.

[0026] In use, the cylinder sleeve 2 is sleeved on the outer wall of the wellbore 1, without the need for prior centering operation, only the contact with the outer wall of the wellbore 1 by at least one contact wheel 26 can trigger the start of the device, the driving part one drives the lower gear 5 to rotate through the motor one, and drives the screw rod one 8 to rotate through the linkage of the lower tooth disc 7 and the plurality of bevel gears one 10, and then drives the fixed seat 25 and the contact wheel 26 to synchronously extend along the radial direction, so that the cylinder sleeve 2 is automatically centered with the wellbore 1, the centering positioning is completed, the automatic driving logic triggered by at least one contact point avoids the traditional manual alignment and centering process, and the initial eccentric state of the cylinder sleeve 2 in the installation process is corrected through the multi-point symmetrical support of the contact wheel 26; Subsequently, the driving part two is started, the motor two drives the upper gear 20 to drive the upper tooth disc 21 to rotate, drives the screw rod two 23 to rotate through the plurality of bevel gears two 22, drives the sliding block 16 to slide along the corresponding sliding groove 15, drives the connected transmission rod 17 and the rotating frame 18 to synchronously rotate, and the plurality of rotating frames 18 synchronously rotate towards the center of the wellbore 1, the top pulley 19 of each rotating frame 18 abuts to the anti-deviation wear-resistant oil pipe from outside to inside, realizes the multi-point symmetrical righting and guiding, and aligns the oil pipe center axis with the center of the wellbore 1; The whole action relies on the upper guide groove 4, the lower guide groove 13, the limiting seat one 11 and the limiting seat two 27 distributed in the fixed plate 3, and the centering unit and the righting unit are driven to act at different times, the sequential actions of the centering unit and the righting unit are accurately controlled, and the interference and the mislinking during coaxial driving are effectively avoided.

[0027] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution range of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belong to the technical solution range of the present application.

Claims

1. A device for calibrating and straightening an oil pipe to prevent eccentric wear, characterized by: The invention comprises a wellbore (1) embedded in an oil production well, wherein the outside of the wellbore (1) is sleeved with a sleeve (2) for straightening an oil pipe to prevent eccentric wear, and the bottom of the sleeve (2) is provided with a centering unit aligned with the center of the wellbore (1); The centering unit comprises a ring frame (6) fixedly arranged on the bottom of the sleeve (2), a lower gear disc (7) is rotatably provided inside the ring frame (6), a plurality of bevel gears (10) meshing with the lower gear disc (7) are provided below the ring frame (6), and two adjacent bevel gears (10) are arranged vertically; Each bevel gear (10) is rotatably mounted on the outer wall of the sleeve (2) through a bearing seat, and a lead screw (8) is threadedly sleeved on the interior of each bevel gear (10); One end of each lead screw (8) extending into the interior of the sleeve (2) is fixedly connected to a fixed seat (25), and a contact wheel (26) is rotatably mounted on the inner wall of the fixed seat (25) and is in close contact with the outer wall of the top of the wellbore (1); The rotation center of the contact wheel (26) is installed in the fixed seat (25) through an axle pin, and the contact wheel (26) rotates around the horizontal axis; Each lead screw (8) is provided with a slide rod (9) on both sides thereof that is in sliding engagement with the sleeve (2), and one end of the slide rod (9) that extends to the interior of the sleeve (2) is fixed to a fixing seat (25); A straightening unit for calibrating the anti-eccentric wear oil pipe is provided on the top of the sleeve (2); A driving unit for driving a centering unit and a straightening unit to work alternately is provided above the ring frame (6); The driving unit first drives the centering unit to keep the sleeve (2) and the wellbore (1) aligned with each other; Then, the driving unit drives the straightening unit to work and calibrate and straighten the anti-eccentric wear oil pipe.

2. The anti-eccentric wear oil pipe calibration and straightening device according to claim 1, characterized in that: The drive unit comprises a fixing plate (3) fixedly arranged on an outer wall surface of one side of the cylinder sleeve (2); A second driving member used in conjunction with the straightening unit is slidably provided on one end of the top surface of the fixing plate (3); A driving member 1 used in conjunction with the centering unit is slidably provided at the other end of the bottom surface of the fixed plate (3); The sliding directions of the driving member 1 and the driving member 2 are opposite.

3. The anti-eccentric wear oil pipe calibration and straightening device according to claim 2, characterized in that: An upper guide groove (4) of a strip-shaped structure is provided at one end of the top surface of the fixing plate (3), and a limiting seat (11) is provided inside the upper guide groove (4); An intermediate gear (12) driven by a servo motor is provided in a groove cavity in the middle of the bottom surface of the fixed plate (3); A lower guide groove (13) is provided at the other end of the bottom surface of the fixed plate (3), and a second limit seat (27) is provided inside the lower guide groove (13) for limiting sliding. The surfaces of the limiting seat 1 (11) and the limiting seat 2 (27) are both equipped with racks that mesh with the intermediate gear (12); The lower guide groove (13) and the upper guide groove (4) are parallel and do not intersect with each other, and are not arranged to penetrate each other.

4. The anti-eccentric wear oil pipe calibration and straightening device according to claim 2, characterized in that: The driving member 1 comprises a lower gear (5) driven by the motor 1, and the lower gear (5) is meshed with the outer wall of the lower gear disc (7).

5. The anti-eccentric wear oil pipe calibration and straightening device according to claim 1, characterized in that: The straightening unit comprises a ring seat (14) arranged on the top of the sleeve (2), wherein the inner wall surface of the ring seat (14) is provided with a plurality of turning frames (18) for rotation, and a pulley (19) for contacting the anti-eccentric wear oil pipe that moves axially up and down is rotatably provided in the U-shaped groove at the top of each turning frame (18).

6. The anti-eccentric wear oil pipe calibration and straightening device according to claim 5, characterized in that: The surface of the ring seat (14) is provided with a plurality of slide grooves (15), and a second screw (23) is rotatably provided inside each slide groove (15). The internal thread of the second screw (23) is sleeved with a slider (16) that slides along the corresponding slide groove (15). The upper end of the slider (16) is hinged with a transmission rod (17), and the end of the transmission rod (17) is hinged with the flip frame (18).

7. The anti-eccentric wear oil pipe calibration and straightening device according to claim 6, characterized in that: A bevel gear 2 (22) is fixed on the outer side of one end of the second lead screw (23) close to the edge of the ring seat (14); An upper gear disc (21) is rotatably provided below the ring seat (14); The second driving member includes an upper gear (20) driven by the second motor and meshing with the upper gear disc (21); The upper portion of the upper toothed disc (21) is meshed with the second bevel gear (22).

8. The anti-eccentric wear oil pipe calibration and straightening device according to claim 7, characterized in that: Two damping bearings (24) are provided on the sleeve (2); The damping bearings (24) are respectively arranged on the top outer wall of the sleeve (2) and the inner cavity position of the ring frame (6), the upper damping bearing (24) is connected to the upper gear disc (21), and the lower damping bearing (24) is connected to the lower gear disc (7).

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