CN210714512U

CN210714512U - Hydraulic oil pipe centralizer

Info

Publication number: CN210714512U
Application number: CN201921211084.8U
Authority: CN
Inventors: 陈柯桦; 薛培强; 陈微熙; 吴正银; 陈海汪; 徐帅; 程欢; 胡康; 李峰涛
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-06-09
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a hydraulic oil pipe centralizer belongs to oil and gas development field. This hydraulic pressure oil pipe centralizer includes: the centralizer body, actuating mechanism, right shell fragment mechanism and a plurality of spacing ring of ground of changing, actuating mechanism sets up the one end at the centralizer body along the axial slidable ground of centralizer body, right shell fragment mechanism suit on the centralizer body, the one end of right shell fragment mechanism is connected with actuating mechanism's one end, the other end of right shell fragment mechanism is connected on the other end of centralizer body, each spacing ring detachably suit is on the centralizer body, and the spacing ring of suit on the centralizer body is located between the other end of actuating mechanism and right shell fragment mechanism, the spacing ring of suit on the centralizer body is located actuating mechanism's slip path. The utility model discloses can control the outside expanded degree of hydraulic pressure oil pipe centralizer.

Description

Hydraulic oil pipe centralizer

Technical Field

The utility model relates to an oil and gas development field, in particular to hydraulic oil pipe centralizer.

Background

In horizontal wells and highly deviated wells, the oil pipe is usually deviated to the lower wall of the well due to the gravity problem, so that the centering degree of the oil pipe is poor. In order to center the oil pipe, the conventional hydraulic oil pipe centralizer is used for centralizing the oil pipe.

The existing common hydraulic oil pipe centralizer comprises a centralizer body, a driving mechanism and a centralizing elastic sheet. The centralizer body is a tubular structural member with a central hole and is connected to an oil pipe. The driving mechanism comprises a piston and a piston cylinder sleeve, the piston cylinder sleeve is fixedly sleeved on the centralizer body, a containing cavity is formed between the piston cylinder sleeve and the centralizer body, the piston is fixedly sleeved on the centralizer body and located in the containing cavity, a hydraulic hole is formed in the centralizer body, and the hydraulic hole is communicated with the central hole and the containing cavity respectively. One end of the righting elastic sheet is fixedly connected with the piston, and the other end of the righting elastic sheet is fixedly connected with the other end of the centralizer body. When oil pipe is righted through hydraulic pressure oil pipe centralizer, to the downthehole water injection of centre for the downthehole pressure in centre increases, and the liquid that injects passes through the hydraulic pressure hole and gets into the holding chamber in order to promote the piston motion, makes the piston extrusion rightting shell fragment body inflation of righting dorsad, and the shell fragment of righting offsets with the oil well inner wall thereupon, thereby makes oil pipe right placed in the middle.

In the process of implementing the present invention, the inventor finds that the prior art has at least the following problems:

since the piston pushes the centering spring to expand to a limit extent each time, if a well with a smaller inner diameter is encountered, the excessively expanded centering spring will collapse.

Disclosure of Invention

This use novel example provides a hydraulic oil pipe centralizer, can control outside inflation degree, technical scheme is as follows:

the embodiment of the utility model provides a hydraulic pressure oil pipe centralizer, this hydraulic pressure oil pipe centralizer includes: the centralizer comprises a centralizer body, a driving mechanism, a centralizing spring plate mechanism and a plurality of replaceable limiting rings, wherein the driving mechanism is arranged at one end of the centralizer body in a sliding mode along the axial direction of the centralizer body, the centralizing spring plate mechanism is sleeved on the centralizer body, one end of the centralizing spring plate mechanism is connected with one end of the driving mechanism, the other end of the centralizing spring plate mechanism is connected to the other end of the centralizer body, each limiting ring is detachably sleeved on the centralizer body, the limiting rings sleeved on the centralizer body are located between the driving mechanism and the other end of the centralizing spring plate mechanism, and the limiting rings sleeved on the centralizer body are located on the sliding path of the driving mechanism.

Optionally, the centralizer body comprises: the upper joint, dabber, lower clutch, the upper joint the dabber with the lower clutch is the cavity pipe fitting, the upper joint with the one end intercommunication of dabber, the lower clutch with the other end intercommunication of dabber.

Optionally, the driving mechanism includes a housing and a piston, the housing is fixedly sleeved on the upper joint, the piston is slidably sleeved on the mandrel, one end of the piston is slidably inserted between the housing and the centralizer body in a sealing manner, the other end of the piston is connected with the centralizing spring plate mechanism, the mandrel is provided with a pressurizing channel, one end of the pressurizing channel is communicated with the hollow cavity of the mandrel, and the other end of the pressurizing channel is communicated with the pressurizing cavity formed between the housing, the piston, the mandrel and the upper joint.

Optionally, the spring plate righting mechanism comprises a spring righting plate, a spring sliding seat and a spring fixing seat, the spring sliding seat is slidably sleeved at one end of the mandrel, the spring fixing seat is fixedly sleeved at the other end of the mandrel, the spring righting plate is located between the spring sliding seat and the spring fixing seat, one end of the spring righting plate is connected with the spring sliding seat, and the other end of the spring righting plate is connected with the spring fixing seat.

Optionally, the outer wall of the lower joint protrudes out of the outer wall of the mandrel, and one side of the spring seat, which faces away from the centering elastic sheet, abuts against the lower joint.

Optionally, an opening is provided on a side of the spring slide facing away from the centering spring plate, and the piston is fixedly inserted into the opening.

Optionally, the spring slide with the orientation of spring stator the one side of righting the shell fragment all is provided with the safety cover, the one end of righting the shell fragment is located in the safety cover of spring slide, the other end of righting the shell fragment is located in the safety cover of spring stator.

Optionally, the centering elastic sheet is riveted with the spring sliding seat and the spring fixed seat through a pin shaft.

Optionally, an upper outer flange is arranged on the outer wall of the mandrel, and one end of the limiting ring, which faces away from the piston, abuts against the upper outer flange.

Optionally, a return spring is further sleeved on the mandrel, and the return spring is clamped between the spring sliding seat and the upper outer flange.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is:

the embodiment of the utility model provides a hydraulic pressure oil pipe centralizer is according to the size of oil well internal diameter earlier before the use, selects the suitable spacing ring of axial length in a plurality of places of replacement spacing rings to finish the assembly of hydraulic pressure oil pipe centralizer. And after the hydraulic oil pipe centralizer is assembled, connecting the hydraulic oil pipe centralizer with the oil pipe, and integrally conveying the hydraulic oil pipe centralizer into the underground. When oil pipe needs to be righted, the driving mechanism is controlled to move towards the righting elastic sheet mechanism along the axial direction of the centralizer body, so that the driving mechanism can push one end of the righting elastic sheet mechanism to move towards the other end of the righting elastic sheet mechanism along the axial direction of the centralizer body, and the righting elastic sheet mechanism gradually expands back to the centralizer body under the extrusion of the driving mechanism. With the further movement of the driving mechanism, one end of the righting elastic sheet mechanism is abutted against the limiting ring, so that the maximum moving distance of the driving mechanism is limited through the limiting ring, namely, the maximum expansion degree of the righting elastic sheet mechanism is limited. Because the spacing ring is removable, and the suitable spacing ring of axial length has been selected earlier before the use, so through the maximum expansion degree of the shell fragment mechanism of rightting that the spacing ring is injectd, can satisfy current oil well internal diameter. If the hydraulic oil pipe centralizer is applied to oil wells with other inner diameters, only the limiting rings with different axial lengths need to be replaced, so that the centralizing elastic sheet mechanism is prevented from being broken, and the applicability of the hydraulic oil pipe centralizer is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a cross-sectional view of a hydraulic tubing centralizer according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial enlarged view of FIG. 1 at B;

wherein the reference numbers: 1. a centralizer body; 11. an upper joint; 12. a mandrel; 121. a front end portion; 122. a middle portion; 1221. an upper outer flange; 1222. a lower outer flange; 123. a rear end portion; 124. a pressurizing channel; 125. a hollow cavity; 13. a lower joint; 2. a drive mechanism; 21. a housing; 22. a piston; 3. a spring plate righting mechanism; 31. a spring slide; 311. an opening; 32. righting the elastic sheet; 33. a spring fixing seat; 34. a protective cover; 4. a limiting ring; 5. a return spring; 6. a seal ring; 7. a pin; 8. a pressurization cavity; 9. and (7) a pin shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The embodiment of the utility model provides a hydraulic pressure oil pipe centralizer, hydraulic pressure oil pipe centralizer are common oil development equipment, and it is arranged in because the gravity problem is partial to the well lower wall in horizontal well or highly deviated well when leading to oil pipe's centering degree difference when oil pipe, and hydraulic pressure oil pipe centralizer can right oil pipe, makes oil pipe be in position placed in the middle in the oil well.

Fig. 1 is the embodiment of the utility model provides a cross-sectional view of hydraulic pressure oil pipe centralizer, as shown in fig. 1, this hydraulic pressure oil pipe centralizer includes: the centralizer body 1, actuating mechanism 2, right shell fragment mechanism 3 and a plurality of spacing ring 4 (refer to fig. 2) of changing ground, actuating mechanism 2 sets up the one end at centralizer body 1 along the axial slidable ground of centralizer body 1, right shell fragment mechanism 3 suit on centralizer body 1, the one end of righting shell fragment mechanism 3 is connected with actuating mechanism 2's one end, the other end of righting shell fragment mechanism 3 is connected on the other end of centralizer body 1, each spacing ring 4 detachably suit is on centralizer body 1, and the spacing ring 4 of suit on centralizer body 1 is located between actuating mechanism 2 and the other end of righting shell fragment mechanism 3, the spacing ring 4 of suit on centralizer body 1 is located on actuating mechanism 4's slip path.

In the above embodiment, before the hydraulic oil pipe centralizer is used, the proper limit ring 4 is selected to be sleeved on the centralizer body 1 according to the inner diameter of the oil well, the centralizer body 1 is connected with the oil pipe and then placed into the oil well, when the oil pipe needs to be centered, liquid is introduced into the oil pipe, the liquid flows into the hydraulic oil pipe centralizer body 1 connected with the oil pipe, the liquid flows into the driving mechanism 2 through the hydraulic oil pipe centralizer body 1, and the hydraulic pressure in the driving mechanism 2 is increased. Through the effect of hydraulic pressure, actuating mechanism 2 drives and rights the end that shell fragment mechanism 3 and actuating mechanism 2 are connected one and slides to the other end of righting shell fragment mechanism 3, because the both ends distance of righting shell fragment mechanism 3 reduces, leads to righting shell fragment mechanism 3 to be extrudeed, expands to the oil well inner wall direction. When the driving mechanism 2 is abutted against the limiting ring 4 and then stops moving, the righting elastic sheet mechanism 3 stops expanding towards the inner wall of the oil well, and the oil pipe is centered in the oil well under the action of the hydraulic oil pipe centralizer. The degree of righting the expansion of shell fragment mechanism 3 and oil well internal diameter looks adaptation this moment, hydraulic pressure oil pipe centralizer when having enough righting power, avoids righting the too big of shell fragment mechanism 3 pressurized load, extension tool life.

It should be noted that, in the same time, only one limit ring 4 is installed on the centralizer body 1, and the rest limit rings 4 are all for use.

Alternatively, as shown in fig. 1, the centralizer body 1 includes: the pipe fitting comprises an upper joint 11, a mandrel 12 and a lower joint 13, wherein the upper joint 11, the mandrel 12 and the lower joint 13 are all hollow pipe fittings, the upper joint 11 is communicated with one end of the mandrel 12, and the lower joint 13 is communicated with the other end of the mandrel 12.

In the above embodiment, the upper joint 11 is in threaded communication with one end of the mandrel 12, the lower joint 13 is in threaded connection with the other end of the mandrel 12, and the lower joint 13 is integrally connected with the other end of the mandrel 12 by the pin 7. The upper joint 11 and the lower joint 13 are respectively in threaded connection with an oil pipe, so that the centralizer body 1 is connected to the oil pipe, and the centralizer body 1 is communicated with the oil pipe because the upper joint 11, the mandrel 12 and the lower joint 13 are all hollow pipe fittings, and liquid passing through the oil pipe can enter a hydraulic oil pipe centralizer.

Illustratively, the mandrel 12 may be divided into three parts: a front end portion 121 connected to the upper joint 11, a rear end portion 123 connected to the lower joint 13, and a middle portion 122 interposed between the front end portion 121 and the rear end portion 123. The front end portion 121 is screwed with the upper joint 11, the rear end portion 123 is screwed with the lower joint 13, and the rear end portion 123 and the lower joint 13 are connected together by the pin 7.

With reference to fig. 1, in this embodiment, the driving mechanism 2 includes a housing 21 and a piston 22, the housing 21 is fixedly sleeved on the upper joint 11, the piston 22 is slidably sleeved on the mandrel 12, one end of the piston 22 is slidably and hermetically inserted between the housing 21 and the centralizer body 1, the other end of the piston 22 is connected to the centralizing spring mechanism 3, the mandrel 12 is provided with a pressurizing passage 124, one end of the pressurizing passage 124 is communicated with the hollow cavity 125 of the mandrel 12, and the other end of the pressurizing passage 124 is communicated with the pressurizing cavity 8 formed between the housing 21, the piston 22, the mandrel 12 and the upper joint 11.

In the above implementation manner, when the hydraulic oil pipe centralizer needs to be centered, high-pressure liquid is injected into the hollow cavity 125 of the mandrel 12 through the oil pipe communicated with the upper joint 11, and the high-pressure liquid flows into the pressurizing cavity 8 through the pressurizing passage 124, so that the high-pressure liquid pushes the piston 22 to move towards the centering spring plate mechanism 3 along the axial direction of the mandrel 12, and thus the piston 22 can push the centering spring plate mechanism 3 to expand, so as to realize the centering of the oil pipe.

Illustratively, as shown in fig. 1, the housing 21 and the piston 22 are L-shaped, the L-shaped long side of the housing 21 is fixedly sleeved with the upper joint 11, and under the action of the upper joint 11, a certain distance is reserved between the housing 21 and the front end part 121, so that the piston 22 is slidably and hermetically inserted between the housing 21 and the centralizer body 1. The short side of the L shape of the piston 22 is in sealing contact with the shell 21, and the long side of the L shape of the piston 22 is connected with the righting spring plate mechanism 3.

In the above implementation, the pressure chamber 8 is formed between the L-shaped short side of the housing 21, the L-shaped short side of the piston 22, the mandrel 12 and the upper joint 11, and in order to enhance the sealing performance of the pressure chamber 8, the sealing rings 6 are respectively disposed between the housing 21 and the upper joint 11, between the housing 21 and the piston 22, and between the piston 22 and the front end portion 121 of the mandrel 12, so that the pressure chamber 8 formed between the housing 21, the piston 22, the mandrel 12 and the upper joint 11 has a good sealing effect.

Optionally, the centering spring mechanism 3 includes a centering spring 32, a spring slide 31 and a spring seat 33, the spring slide 31 is slidably sleeved on one end of the core shaft 12, the spring seat 33 is fixedly sleeved on the other end of the core shaft 12, the centering spring 32 is located between the spring slide 31 and the spring seat 33, one end of the centering spring 32 is connected with the spring slide 31, and the other end of the centering spring 32 is connected with the spring seat 33.

In the above implementation, the spring slide 31 and the spring seat 33 are respectively disposed at two opposite ends of the spindle 12, and the spring slide 31 is slidable relative to the spindle 12. When the righting elastic sheet mechanism 3 is expanded and righted, the spring sliding seat 31 slides towards the spring fixed seat 33, so that the distance between the spring sliding seat 31 and the spring fixed seat 33 is reduced, the righting elastic sheet 32 connected between the spring sliding seat 31 and the spring fixed seat 33 is extruded, the righting elastic sheet 32 is expanded towards the inner wall of the oil well, and the righting elastic sheet mechanism 3 plays a righting role.

Illustratively, the spring sliding seat 31 is slidably sleeved on the front end portion 121 of the mandrel 12, the spring fixing seat 33 is fixedly sleeved on the rear end portion 123 of the mandrel 12, and two ends of the centering spring plate 32 are respectively connected with the spring sliding seat 31 and the spring fixing seat 33.

Optionally, the outer wall of the lower joint 13 protrudes out of the outer wall of the mandrel 12, and the side of the spring seat 33 facing away from the centering elastic sheet 32 abuts against the lower joint 13.

In the above implementation manner, when the spring sliding seat 31 slides towards the spring fixing seat 33, because one side of the spring fixing seat 33, which faces away from the centering elastic sheet 32, abuts against the lower connector 13, the spring fixing seat 33 does not move, and it is ensured that the spring sliding seat 31 can extrude the centering elastic sheet 32, thereby realizing expansion of the centering elastic sheet 32.

Illustratively, as shown in fig. 1, the outer diameter of the middle portion 122 is greater than the outer diameters of the front and

rear portions

121, 123, so that the middle portion 122 is connected to the front portion 121 by an upper outer flange 1221 as shown in fig. 2, and the middle portion 122 is connected to the front portion 121 by a lower outer flange 1222 as shown in fig. 3. The end of the stop collar 4 facing away from the piston 22 abuts against the upper outer flange 1221 to serve as a stop collar 4.

The outer diameter of the end of the lower adapter 13 connected to the core shaft 12 is larger than the outer diameter of the rear end portion 123, so that the spring seat 33 is interposed between the lower adapter 13 and the lower outer flange 1222, thereby serving to fix the spring seat 33.

Optionally, an opening 311 is provided on a side of the spring slide 31 facing away from the centering spring plate 32, and the piston 22 is fixedly inserted into the opening 311.

In the above implementation, the piston 22 is inserted into the opening 311, and the piston 22 is fixedly connected with the opening 311 through the pin 7, so that the connection area between the piston 22 and the spring slide 31 is increased, and the connection firmness between the piston 22 and the spring slide 31 is improved.

Referring to fig. 2, in the present embodiment, a protective cover 34 is disposed on each of the spring sliding seat 31 and the spring fixing seat 33 on the side facing the centering spring plate 32, one end of the centering spring plate 32 is located in the protective cover 34 of the spring sliding seat 31, and the other end of the centering spring plate 32 is located in the protective cover 34 of the spring fixing seat 33.

In the above implementation manner, the protection cover 34 is used for accommodating the end portion of the centering spring plate 32 and protecting the end portion of the centering spring plate 32, so as to improve the reliability of the hydraulic oil pipe centralizer.

Optionally, the centering elastic sheet 32 is riveted with the spring sliding seat 31 and the spring fixing seat 33 through the pin shaft 9, so that the centering elastic sheet 32 is fixed on the spring sliding seat 31 and the spring fixing seat 33.

In the implementation mode, the centering elastic sheet 32 is installed through the pin shaft 9, so that the centering elastic sheet 32 can be conveniently disassembled and assembled, and the usability of the hydraulic oil pipe centering device is improved.

Optionally, as shown in fig. 2, the mandrel 12 is further sleeved with a return spring 5, and the return spring 5 is sandwiched between the spring slider 31 and the upper outer flange 1221.

In the above-described implementation, the return spring 5 is used to assist the return of the spring slider 31. During the righting operation, under the action of high-pressure liquid, the return spring 5 and the righting elastic sheet 32 are compressed by the spring sliding seat 31 together. After the centralizing operation is finished, the oil pipe stops outputting high-pressure liquid, and the spring sliding seat 31 moves back to the spring fixed seat 33 under the action of elastic potential energy of the centralizing elastic sheet 32 and the return spring 5 until the centralizing elastic sheet 32 and the return spring 5 recover, so that the hydraulic oil pipe centralizer can be taken out of an oil well conveniently.

The embodiment of the utility model provides a working process of hydraulic pressure oil pipe centralizer now briefly introduces:

before the hydraulic oil pipe centralizer is used, a proper limit ring 4 is selected to be sleeved on a mandrel 12 of the centralizer body 1 according to the size of the inner diameter of an oil well. The upper joint 11 and the lower joint 13 are respectively installed together with and communicated with an oil pipe, so that high-pressure liquid for straightening operation can enter the hollow cavity 125 through the oil pipe. After the hydraulic oil pipe centralizer and the oil pipe are assembled, the hydraulic oil pipe centralizer and the oil pipe are placed into the oil well together. When the oil pipe needs to be centered, high-pressure liquid is added into the oil pipe, and the high-pressure liquid flows into the hollow cavity 125 and then enters the pressurizing cavity 8 through the pressurizing passage 124. Under the action of the high-pressure liquid, the piston 22 pushes the spring sliding seat 31 to move towards the spring fixing seat 33 along the axial direction of the mandrel 12, so that the centering elastic sheet 32 fixedly connected between the spring sliding seat 31 and the spring fixing seat 33 is pressed, and the centering elastic sheet 32 expands towards the inner wall of the oil well. Since the return spring 5 is interposed between the spring carriage 31 and the upper outer flange 1221, the return spring 5 is also pressed together with the centering spring plate 32. After the centralizing operation is completed, the oil pipe stops outputting high-pressure liquid, and the spring sliding seat 31 moves back to the spring fixed seat 33 under the action of the elastic potential energy of the centralizing elastic sheet 32 and the return spring 5 until the centralizing elastic sheet 32 and the return spring 5 recover, so that the hydraulic oil pipe centralizer can be taken out of the oil well.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a hydraulic pressure oil pipe centralizer which characterized in that, hydraulic pressure oil pipe centralizer includes: the centralizer comprises a centralizer body (1), a driving mechanism (2), a centralizing spring plate mechanism (3) and a plurality of replaceable limiting rings (4), wherein the driving mechanism (2) is arranged at one end of the centralizer body (1) in a sliding manner along the axial direction of the centralizer body (1), the centralizing spring plate mechanism (3) is sleeved on the centralizer body (1), one end of the centralizing spring plate mechanism (3) is connected with one end of the driving mechanism (2), the other end of the centralizing spring plate mechanism (3) is connected with the other end of the centralizer body (1), each limiting ring (4) is detachably sleeved on the centralizer body (1), and the limiting rings (4) sleeved on the centralizer body (1) are positioned between the driving mechanism (2) and the other end of the centralizing spring plate mechanism (3), the limiting ring (4) sleeved on the centralizer body (1) is positioned on the sliding path of the driving mechanism (2).

2. The hydraulic tubing centralizer according to claim 1, characterized in that the centralizer body (1) comprises: top connection (11), dabber (12), lower clutch (13), top connection (11) dabber (12) with lower clutch (13) are the cavity pipe fitting, top connection (11) with the one end intercommunication of dabber (12), lower clutch (13) with the other end intercommunication of dabber (12).

3. The hydraulic tubing centralizer of claim 2, wherein the drive mechanism (2) comprises a housing (21) and a piston (22), the shell (21) is fixedly sleeved on the upper joint (11), the piston (22) is slidably sleeved on the mandrel (12), one end of the piston (22) is slidably and hermetically inserted between the shell (21) and the centralizer body (1), the other end of the piston (22) is connected with the righting spring plate mechanism (3), a pressurizing channel (124) is arranged on the mandrel (12), one end of the pressurizing channel (124) is communicated with a hollow cavity (125) of the mandrel (12), the other end of the pressurizing channel (124) is communicated with a pressurizing cavity (8) formed among the shell (21), the piston (22), the mandrel (12) and the upper joint (11).

4. The hydraulic tubing centralizer of claim 3, wherein the centralizing spring mechanism (3) comprises a centralizing spring (32), a spring slide (31) and a spring retainer (33), the spring slide (31) is slidably sleeved on one end of the mandrel (12), the spring retainer (33) is fixedly sleeved on the other end of the mandrel (12), the centralizing spring (32) is positioned between the spring slide (31) and the spring retainer (33), one end of the centralizing spring (32) is connected with the spring slide (31), and the other end of the centralizing spring (32) is connected with the spring retainer (33).

5. The hydraulic tubing centralizer of claim 4, wherein the outer wall of the lower joint (13) protrudes from the outer wall of the mandrel (12), and the side of the spring seat (33) facing away from the centralizing spring plate (32) abuts against the lower joint (13).

6. The hydraulic tubing centralizer of claim 4, wherein an opening (311) is provided on a side of the spring slide (31) facing away from the centralizing spring plate (32), and the piston (22) is fixedly inserted into the opening (311).

7. The hydraulic tubing centralizer of claim 4, wherein a protective cover (34) is arranged on each of the spring slide (31) and the spring retainer (33) on the side facing the centralizing spring plate (32), one end of the centralizing spring plate (32) is positioned in the protective cover (34) of the spring slide (31), and the other end of the centralizing spring plate (32) is positioned in the protective cover (34) of the spring retainer (33).

8. The hydraulic tubing centralizer of claim 4, wherein the centralizing spring (32) is riveted with the spring slide (31) and the spring retainer (33) through a pin shaft (9).

9. The hydraulic tubing centralizer according to claim 4, characterized in that an upper outer flange (1221) is provided on the outer wall of the mandrel (12), and the end of the retainer ring (4) facing away from the piston (22) abuts against the upper outer flange (1221).

10. The hydraulic tubing centralizer of claim 9, wherein the mandrel (12) is further sleeved with a return spring (5), and the return spring (5) is clamped between the spring sliding seat (31) and the upper outer flange (1221).