Non-contact centralizer and centralizing system for ultrasonic detection equipment of oil passing pipe

Abstract

The invention belongs to the technical field of oil and gas exploitation, and discloses a non-contact centralizer and centralizing system for ultrasonic detection equipment of an oil passing pipe, and the non-contact centralizer comprises a fixing rod, an adjusting structure, a detection structure and a control structure. The detection structure is used for detecting the horizontal distance between the central axis of the fixing rod and the inner wall of the shaft, namely detecting the horizontal distance between the central axis of the ultrasonic detection equipment and the inner wall of the shaft, and judging whether the ultrasonic detection equipment is located in the center of the shaft according to detection results. The detection structure and each electromagnetic coil are connected to the control structure, the detection structure sends a detection result to the control structure, the control structure adjusts the current value in the electromagnetic coil and the horizontal distance between the electromagnetic coil and the inner wall of the shaft according to the detection result, and the electromagnetic acting force between each electromagnetic coil and the shaft is adjusted; the positions of the fixing rod and the ultrasonic detection equipment are adjusted in the circumferential direction, it is ensured that the central axis of the ultrasonic detection equipment coincides with the central axis of the shaft, and then the detection precision and efficiency of the ultrasonic detection equipment are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas extraction, and in particular to a non-contact centralizer and a centralizing system for through-oil-pipe ultrasonic detection equipment. Background Art

[0002] As a crucial infrastructure for energy storage, the safe and stable operation of gas storage facilities is directly linked to the reliability of the energy supply system. Under the dual pressures of cyclical injection and production operations and ultra-high formation pressures, gas storage wellbore systems face significant risks, including mechanical deformation of injection and production tubing and failure of multi-stage casing seals. Therefore, precise location and efficient sealing of leak sources through intelligent detection methods are crucial prerequisites for ensuring safe and efficient operation throughout the gas storage facility's lifecycle.

[0003] Ultrasonic leak detection technology has been developed. When leaking fluid passes through a leak point, pressure differentials or turbulence generate high-frequency sound waves. By capturing and analyzing these ultrasonic signals, the leak can be precisely located. Patent No. CN205477419U discloses a centralizer for ultrasonic testing equipment for gas storage wells. Nuts adjust the distance between the pulleys and the main cylinder, ensuring that the four pulleys evenly contact the wellbore wall and the ultrasonic probe is perpendicular to the wellbore wall, thereby ensuring accurate ultrasonic testing.

[0004] However, the pulley in this patented solution emits broadband noise as it moves along the wellbore, masking weak leak signals and affecting the accuracy of leak source location. In actual engineering applications, to eliminate the dry noise from the pulley, multiple fixed-point inspections are performed near the suspected leak point. This not only significantly reduces detection speed but also makes the identification of suspected leak points susceptible to subjective factors, making accuracy uncertain.

[0005] Therefore, there is an urgent need for a centralizer that can eliminate the interference of pulley noise, ensure the verticality of the ultrasonic detection equipment and the well wall, and thus ensure the accuracy of the leakage point location. Summary of the Invention

[0006] The purpose of the present invention is to provide a non-contact centralizer and centralizing system for ultrasonic testing equipment through oil pipes, which can realize non-contact positioning of ultrasonic testing equipment, eliminate pulley noise interference, and realize efficient and accurate leakage point determination.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In one aspect, a non-contact centralizer for ultrasonic testing equipment for oil pipes is provided, comprising:

[0009] A fixing rod, detachably connected to an end portion of the ultrasonic detection device and coaxially arranged with the ultrasonic detection device;

[0010] The adjustment structure includes a plurality of adjustment assemblies arranged at intervals along the circumference of the fixed rod, the adjustment assembly including a first adjustment rod, an electromagnetic coil, and a second adjustment rod, wherein the first end of the first adjustment rod is hinged to the fixed rod and the second end is hinged to the electromagnetic coil; the first end of the second adjustment rod is hinged to the electromagnetic coil and the second end is vertically slidably arranged on the fixed rod;

[0011] a detection structure, provided on the fixing rod, the detection structure being used to detect the horizontal distance between the center of the fixing rod and the inner wall of the wellbore;

[0012] The control structure, the detection structure and each electromagnetic coil are connected to the control structure, and the control structure can adjust the current value in the electromagnetic coil.

[0013] As an optional solution for the non-contact centralizer of the through-oil pipe ultrasonic detection equipment, the adjustment assembly also includes a driving mechanism, which is arranged on the fixed rod and connected to the control structure. The driving mechanism is used to drive the sliding of the second end of the second adjustment rod.

[0014] As an optional solution for the non-contact centralizer of the oil pipe ultrasonic detection equipment, a plurality of guide grooves are provided on the outer wall of the fixed rod at intervals along the circumferential direction, and the second ends of the plurality of second adjustment rods are slidably arranged in the plurality of guide grooves in a one-to-one correspondence.

[0015] As an optional solution for the non-contact centralizer of the through-tubing ultrasonic testing equipment, the adjustment assembly also includes:

[0016] a screw rod, rotatably disposed on the fixed rod in a vertical direction and connected to an output end of the driving mechanism;

[0017] The transmission member is arranged at the second end of the second adjusting rod, and the transmission member is sleeved on the screw rod and matched with the screw rod thread.

[0018] As an optional solution for the non-contact centralizer of the through-tubing ultrasonic testing equipment, the detection structure includes a plurality of first distance measuring sensors, which are arranged at intervals along the circumference of the fixed rod.

[0019] As an alternative to the non-contact centralizer of the through-tubing ultrasonic testing equipment, the center coordinates of the ultrasonic testing equipment are:

[0020]

[0021] Among them, d1 is the horizontal distance between the center of the ultrasonic detection equipment and the inner wall of the wellbore along the positive x direction; d2 is the horizontal distance between the center of the ultrasonic detection equipment and the inner wall of the wellbore along the negative x direction; d3 is the horizontal distance between the center of the ultrasonic detection equipment and the inner wall of the wellbore along the positive y direction; d4 is the horizontal distance between the center of the ultrasonic detection equipment and the inner wall of the wellbore along the negative y direction.

[0022] As an optional solution for the non-contact centralizer of the through-oil pipe ultrasonic detection equipment, a plurality of installation grooves are spaced apart on the outer peripheral wall of the fixing rod, and a plurality of the first ranging sensors are arranged in the plurality of installation grooves in a one-to-one correspondence.

[0023] As an optional solution for the non-contact centralizer of the through-tubing ultrasonic testing equipment, the first end of the fixing rod is provided with a first connecting portion, and the ultrasonic testing equipment is provided with a second connecting portion;

[0024] The first connection portion is screwed onto the second connection portion;

[0025] Alternatively, the first connecting portion is snap-connected to the second connecting portion.

[0026] In another aspect, a non-contact righting system for ultrasonic inspection equipment for oil pipes is provided, comprising:

[0027] Ultrasonic testing equipment;

[0028] At least one non-contact centralizer for through-the-tubing ultrasonic testing equipment according to any one of claims 1-8.

[0029] As an optional solution for the non-contact righting system of the through-the-oil-pipe ultrasonic detection equipment, the ultrasonic detection equipment is provided with a plurality of second distance measuring sensors spaced apart along the circumference, and each of the second distance measuring sensors is connected to the control structure.

[0030] Beneficial effects of the present invention:

[0031] The present invention provides a non-contact centralizer and centralizing system for through-the-tubing ultrasonic testing equipment. A detection structure detects the horizontal distance between the center axis of a fixed rod and the inner wall of the wellbore, specifically the distance between the center axis of the ultrasonic testing equipment and the inner wall of the wellbore. Based on the detection results, the detection structure determines whether the ultrasonic testing equipment is located at the center of the wellbore. The detection structure transmits the detection results to a control structure. Based on the detection results, the control structure adjusts the current within the electromagnetic coils and the horizontal distance between the electromagnetic coils and the inner wall of the wellbore to adjust the electromagnetic force between each electromagnetic coil and the wellbore, thereby circumferentially adjusting the position of the fixed rod and ultrasonic testing equipment to ensure that the center axis of the ultrasonic testing equipment coincides with the center axis of the wellbore, thereby ensuring the detection accuracy and efficiency of the ultrasonic testing equipment. During the ultrasonic testing equipment's position adjustment process, the electromagnetic coils do not need to contact the inner wall of the wellbore, achieving non-contact positioning adjustment and eliminating the generation of additional noise. This eliminates any impact or interference with the ultrasonic testing equipment's detection, facilitating the efficient and accurate identification of wellbore leaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a cross-sectional view of a non-contact centralizer of an ultrasonic inspection device for oil pipes provided in an embodiment of the present invention;

[0033] Figure 2 2. It is a front view of a non-contact centralizer of an ultrasonic inspection device for oil pipes provided in an embodiment of the present invention;

[0034] Figure 3 2. It is a top view of a non-contact centralizer of an ultrasonic inspection device for oil pipes provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the center coordinates of an ultrasonic detection device provided in an embodiment of the present invention;

[0036] Figure 5 It is the relationship between the electromagnetic force on the electromagnetic coil and the distance between the electromagnetic coil and the inner wall of the wellbore;

[0037] Figure 6 It is the relationship between the electromagnetic force acting on the electromagnetic coil and the current value in the electromagnetic coil.

[0038] In the picture:

[0039] 100. Ultrasonic detection equipment; 101. Second distance measuring sensor; 102. Acoustic wave sensor; 200. Wellbore;

[0040] 1. Fixed rod; 10. Guide chute;

[0041] 2. Adjustment structure; 21. Adjustment assembly; 211. First adjustment rod; 212. Electromagnetic coil; 213. Second adjustment rod; 214. Screw rod; 215. Transmission member;

[0042] 3. Detection structure; 31. First distance measuring sensor. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0044] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0047] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0048] like Figures 1 to 3As shown, this embodiment provides a non-contact centralizer for through-tubing ultrasonic testing equipment. The non-contact centralizer includes a fixed rod 1, an adjustment structure 2, a detection structure 3, and a control structure. The fixed rod 1 is detachably connected to the ultrasonic testing equipment 100 and is coaxially arranged with the ultrasonic testing equipment 100. The adjustment structure 2 includes a plurality of adjustment assemblies 21 spaced circumferentially along the fixed rod 1. The adjustment assemblies 21 include a first adjustment rod 211, an electromagnetic coil 212, and a second adjustment rod 213. The first end of the first adjustment rod 211 is hinged to the fixed rod 1 and the second end is hinged to the electromagnetic coil 212. The second end of the second adjustment rod 213 is hinged to the electromagnetic coil 212 and vertically slidably arranged on the fixed rod 1. The detection structure 3 is disposed on the fixed rod 1 and is used to detect the horizontal distance between the central axis of the fixed rod 1 and the inner wall of the wellbore 200, that is, the horizontal distance between the central axis of the ultrasonic testing equipment 100 and the inner wall of the wellbore 200. Based on the detection results, it is determined whether the ultrasonic testing equipment 100 is located at the center of the wellbore 200. The detection structure 3 and each electromagnetic coil 212 are connected to the control structure. The detection structure 3 sends the detection results to the control structure. The control structure adjusts the current value in the electromagnetic coil 212 and the horizontal distance between the electromagnetic coil 212 and the inner wall of the wellbore 200 based on the detection results to adjust the electromagnetic force between each electromagnetic coil 212 and the wellbore 200, so as to adjust the position of the fixed rod 1 and the ultrasonic detection equipment 100 along the circumferential direction to ensure that the central axis of the ultrasonic detection equipment 100 coincides with the central axis of the wellbore 200, thereby ensuring the detection accuracy and efficiency of the ultrasonic detection equipment 100.

[0049] During the position adjustment process of the ultrasonic detection equipment 100, the electromagnetic coil 212 does not need to contact the inner wall of the wellbore 200, thereby realizing non-contact positioning adjustment without generating additional noise, and thus will not affect or interfere with the ultrasonic detection of the ultrasonic detection equipment 100, which is conducive to the efficient and accurate determination of the leakage point of the wellbore 200.

[0050] Specifically, the ultrasonic detection device 100 and the electromagnetic coil 212 are both existing devices. Their specific structures and principles are referenced in the prior art and are not described in detail here. The control structure is a controller commonly used in the art, and the controller is burned with the relevant control program. Its specific structure, principles, and control logic are referenced in the prior art.

[0051] For example, the wellbore 200 is made of carbon steel, which has high mechanical strength, is not easily deformed or broken, and has good ferromagnetism.

[0052] Optionally, the adjustment assembly 21 further includes a driving mechanism, which is disposed within the fixed rod 1 and connected to the control structure, and the driving mechanism is used to drive the sliding of the second end of the second adjustment rod 213. Driven by the driving mechanism, the second end of the second adjustment rod 213 can slide to change the angle between the first adjustment rod 211 and the second adjustment rod 213, thereby changing the distance between the electromagnetic coil 212 and the inner wall of the wellbore 200. The second end of each second adjustment rod 213 is controlled by a separate driving mechanism to facilitate individual adjustment of the position of each electromagnetic coil 212 to achieve rapid and accurate position adjustment of the ultrasonic detection equipment 100. Exemplarily, the driving mechanism is a motor to achieve precise control of the second end of the second adjustment rod 213, and the motor has a low failure rate, low maintenance cost, and a long service life.

[0053] Specifically, the fixing rod 1 is provided with a mounting cavity, and the driving mechanism is arranged in the mounting cavity, which makes rational use of space and also provides a certain degree of protection for the driving mechanism.

[0054] Further, refer to Figure 2 The outer wall of the fixed rod 1 is provided with a plurality of guide slots 10 spaced apart along the circumferential direction, and the second ends of the plurality of second adjustment rods 213 are slidably arranged in the plurality of guide slots 10 one by one. The above arrangement can provide a guiding effect for the sliding of the second ends of the second adjustment rods 213.

[0055] Specifically, in this embodiment, eight adjustment components 21 are provided, and correspondingly, eight guide slots 10 are also provided; in other embodiments, the number of adjustment components 21 and guide slots 10 can be set as needed and is not specifically limited here.

[0056] Optionally, the adjustment assembly 21 further includes a screw rod 214 and a transmission member 215, referring to Figure 2 The screw rod 214 is rotatably arranged on the fixed rod 1 around the vertical direction and is connected to the output end of the driving mechanism; the transmission member 215 is arranged on the second end of the second adjusting rod 213, and the transmission member 215 is sleeved on the screw rod 214 and threadedly engaged with the screw rod 214. Under the drive of the driving mechanism, the screw rod 214 can rotate around its own axis, that is, rotate vertically. Combined with the threaded engagement between the screw rod 214 and the transmission member 215, it can drive the transmission member 215 to move vertically, thereby causing the second end of the second adjusting rod 213 to move vertically, adjusting the distance between the electromagnetic coil 212 and the inner wall of the wellbore 200, and then adjusting the electromagnetic force between the electromagnetic coil 212 and the wellbore 200, thereby achieving the purpose of adjusting the position of the fixed rod 1 and the ultrasonic detection equipment 100. Specifically, in this embodiment, the screw rod 214 and the transmission member 215 are both arranged in the guide groove 10.

[0057] Optionally, the detection structure 3 includes a plurality of first distance measuring sensors 31, such as Figure 2As shown, multiple first ranging sensors 31 are spaced apart along the circumference of the fixed rod 1 to accurately determine the position of the fixed rod 1, which also facilitates accurate determination of the position of the ultrasonic detection device 100. Specifically, the first ranging sensors 31 are existing devices, and their specific structure and principles are referenced in the prior art and will not be further described here. For example, in this embodiment, four first ranging sensors 31 are provided.

[0058] Furthermore, the center coordinates of the ultrasonic detection device 100 are Among them, reference Figure 4 d1 is the distance from the center of the ultrasonic testing device 100 to the inner wall of the wellbore 200 along the positive x direction; d2 is the distance from the center of the ultrasonic testing device 100 to the inner wall of the wellbore 200 along the negative x direction; d3 is the distance from the center of the ultrasonic testing device 100 to the inner wall of the wellbore 200 along the positive y direction; and d4 is the distance from the center of the ultrasonic testing device 100 to the inner wall of the wellbore 200 along the negative y direction. In other words, a plane coordinate system is established with the center of the wellbore 200 cross section as the origin. The distances between the center of the fixed rod 1 and the inner wall of the wellbore 200 are measured along the positive x direction, negative x direction, positive y direction, and negative y direction, respectively. Combined with the inner diameter of the wellbore 200, the plane position coordinates of the center of the fixed rod 1 can be calculated. Based on these plane position coordinates, the control structure can calculate the electromagnetic force required to excite each electromagnetic coil 212 and the required current value for each magnetic coil 212, thereby accurately adjusting the position of the fixed rod 1 and the ultrasonic testing device 100.

[0059] Optionally, the outer wall of the fixing rod 1 is provided with a plurality of mounting grooves, and the plurality of first distance measuring sensors 31 are disposed in the plurality of mounting grooves in a one-to-one correspondence, thereby optimizing the spatial layout and improving the overall neatness, while also providing a certain degree of protection for the first distance measuring sensors 31. Specifically in this embodiment, four mounting grooves are also provided accordingly.

[0060] Optionally, the first end of the fixing rod 1 is provided with a first connecting portion, and the ultrasonic detection device 100 is provided with a second connecting portion, wherein the first connecting portion is threadedly screwed onto the second connecting portion; alternatively, the first connecting portion is clipped onto the second connecting portion, and the specific clipping method is referred to in the prior art. Both of these arrangements enable quick connection and disconnection of the fixing rod 1 and the ultrasonic detection device 100, thereby improving assembly efficiency.

[0061] Figure 5The following describes the relationship between the distance between the electromagnetic coil 212 and the inner wall of the wellbore 200 and the electromagnetic force acting on the electromagnetic coil 212 when the current flowing through the electromagnetic coil 212 remains constant. It is clear that, when the current flowing through the electromagnetic coil 212 remains constant, the smaller the distance between the electromagnetic coil 212 and the inner wall of the wellbore 200, the greater the electromagnetic force acting on the electromagnetic coil 212, meaning that it is easier to pull the fixed rod 1 and the ultrasonic testing device 100 to the center position. Furthermore, the relationship between the electromagnetic force acting on the electromagnetic coil 212 and the distance from the inner wall of the wellbore 200 is approximately inversely proportional to the square of the power of the electromagnetic coil 212. Specifically, if the distance from the inner wall of the wellbore 200 is halved, the electromagnetic force acting on the electromagnetic coil 212 is approximately quadrupled. Therefore, to improve the position adjustment effect, during the downhole operation, the multiple adjustment assemblies 21 are appropriately extended to minimize the distance between the electromagnetic coil 212 and the inner wall of the wellbore 200, without the electromagnetic coil 212 contacting the inner wall of the wellbore 200.

[0062] Figure 6 The figure describes the relationship between the electromagnetic force acting on electromagnetic coil 212 and the current value within electromagnetic coil 212 when the distance between electromagnetic coil 212 and the inner wall of wellbore 200 remains unchanged. It can be clearly seen that as the current value increases, the electromagnetic force acting on electromagnetic coil 212 increases in direct proportion to the square of the original value. That is, when the current doubles, the electromagnetic force acting on electromagnetic coil 212 increases to four times the original value.

[0063] In this embodiment, the magnitude of the electromagnetic force acting on the electromagnetic coil 212 can be adjusted by controlling both the current within the electromagnetic coil 212 and the distance between the electromagnetic coil 212 and the inner wall of the wellbore 200. The resultant force acting on the fixed rod 1 and the ultrasonic testing device 100 is the vector summation of the electromagnetic forces acting on the multiple electromagnetic coils 212. Under the control of the control structure, this resultant force can be consistently directed toward the axis of the wellbore 200.

[0064] On the other hand, this embodiment also provides a non-contact straightening system for through-oil-pipe ultrasonic detection equipment, including ultrasonic detection equipment 100 and the above-mentioned non-contact straightening device for through-oil-pipe ultrasonic detection equipment, which has all the beneficial effects of the above-mentioned non-contact straightening device for through-oil-pipe ultrasonic detection equipment and will not be repeated here.

[0065] Specifically, in this embodiment, referring to Figure 1 The non-contact centralizing system includes two non-contact centralizers, which are respectively arranged at both ends of the ultrasonic detection equipment 100; in other embodiments, only one non-contact centralizer may be provided.

[0066] Furthermore, the ultrasonic detection device 100 is provided with a plurality of second ranging sensors 101 spaced circumferentially. Each second ranging sensor 101 is connected to the control structure. The second ranging sensor 101 is used to measure the horizontal distance between the center of the ultrasonic detection device 100 and the inner wall of the wellbore 200, providing the control structure with mid-segment distance information, further improving the accuracy of position adjustment of the ultrasonic detection device 100. For example, the second ranging sensor 101 is also an existing device. Its specific structure and principle refer to the existing art and are not further described here.

[0067] Specifically, the ultrasonic detection device 100 is provided with a plurality of acoustic wave sensors 102 spaced apart along the circumferential direction, and the acoustic wave sensors 102 are used to detect leakage points on the inner wall of the wellbore 200 .

[0068] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A non-contact centralizer for ultrasonic testing equipment through oil pipes, characterized in that: include: A fixing rod (1) is detachably connected to the end of the ultrasonic detection device (100) and is coaxially arranged with the ultrasonic detection device (100); An adjustment structure (2) comprises a plurality of adjustment assemblies (21) arranged at intervals along the circumference of the fixed rod (1), the adjustment assembly (21) comprising a first adjustment rod (211), an electromagnetic coil (212) and a second adjustment rod (213), wherein a first end of the first adjustment rod (211) is hinged to the fixed rod (1), and a second end is hinged to the electromagnetic coil (212); a first end of the second adjustment rod (213) is hinged to the electromagnetic coil (212), and a second end is vertically slidably arranged on the fixed rod (1); A detection structure (3) is provided on the fixing rod (1), and the detection structure (3) is used to detect the horizontal distance between the center of the fixing rod (1) and the inner wall of the wellbore (200); The control structure, the detection structure (3) and each electromagnetic coil (212) are connected to the control structure, and the control structure can adjust the current value in the electromagnetic coil (212).

2. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to claim 1 is characterized in that: The adjustment assembly (21) further comprises a driving mechanism, which is arranged on the fixing rod (1) and connected to the control structure, and is used for driving the sliding of the second end of the second adjustment rod (213).

3. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to claim 2, characterized in that: The outer wall of the fixing rod (1) is provided with a plurality of guide slots (10) spaced apart along the circumferential direction, and the second ends of the plurality of second adjustment rods (213) are slidably arranged in the plurality of guide slots (10) in a one-to-one correspondence.

4. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to claim 2, characterized in that: The regulating component (21) further comprises: A screw rod (214) is rotatably arranged on the fixed rod (1) in a vertical direction and is connected to the output end of the driving mechanism; A transmission member (215) is provided at the second end of the second adjusting rod (213), and the transmission member (215) is sleeved on the screw rod (214) and threadedly engaged with the screw rod (214).

5. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to claim 1, characterized in that: The detection structure (3) comprises a plurality of first distance measuring sensors (31), and the plurality of first distance measuring sensors (31) are arranged at intervals along the circumference of the fixed rod (1).

6. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to claim 5, characterized in that: The center coordinates of the ultrasonic detection device (100) are: Wherein, d1 is the horizontal distance between the center of the ultrasonic detection device (100) and the inner wall of the wellbore (200) along the positive x direction; d2 is the horizontal distance between the center of the ultrasonic detection device (100) and the inner wall of the wellbore (200) along the negative x direction; d3 is the horizontal distance between the center of the ultrasonic detection device (100) and the inner wall of the wellbore (200) along the positive y direction; and d4 is the horizontal distance between the center of the ultrasonic detection device (100) and the inner wall of the wellbore (200) along the negative y direction.

7. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to claim 5, characterized in that: The outer peripheral wall of the fixing rod (1) is provided with a plurality of installation slots at intervals, and the plurality of first distance measuring sensors (31) are arranged in the plurality of installation slots in a one-to-one correspondence.

8. The non-contact centralizer for ultrasonic testing equipment for oil pipes according to any one of claims 1 to 7, characterized in that: The first end of the fixing rod (1) is provided with a first connecting portion, and the ultrasonic detection device (100) is provided with a second connecting portion; The first connection portion is screwed onto the second connection portion; Alternatively, the first connecting portion is snap-connected to the second connecting portion.

9. A non-contact righting system for ultrasonic testing equipment through oil pipes, characterized in that: include: Ultrasonic testing equipment (100); At least one non-contact centralizer for through-the-tubing ultrasonic testing equipment according to any one of claims 1-8.

10. The non-contact righting system for oil pipe ultrasonic testing equipment according to claim 9, characterized in that: The ultrasonic detection device (100) is provided with a plurality of second distance measuring sensors (101) spaced apart along the circumferential direction, and each of the second distance measuring sensors (101) is connected to the control structure.

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