Logging instrument key and heavy part repairing method based on material increasing technology

Abstract

The invention discloses a logging instrument part repairing method based on an additive technology, and the method comprises the steps: firstly obtaining the point cloud data of a to-be-repaired logging instrument part, building a digital model of the to-be-repaired logging instrument part according to the point cloud data, comparing a to-be-repaired logging instrument model with a complete part model, and obtaining a to-be-repaired logging instrument part model; the method comprises the following steps of: obtaining a repair part and a repair amount, performing additive repair on a damaged part of a to-be-repaired logging instrument by utilizing an additive process to realize stacking, stacking and filling of the damaged part, finally removing a support, and finishing the repair of the logging instrument by adopting low-temperature hardening and tempering, secondary subtractive finish machining and grinding and polishing. According to the method, efficient maintenance and manufacturing of the instrument are achieved by effectively utilizing the additive technology, the repaired structure is high in reliability, convenient to operate, rapid and efficient, and the problem that the quality of the repaired part cannot meet the requirements of the manufacturing and using working conditions of logging equipment due to limitation of the welding process, the part structure shape and the like after repairing is conducted through traditional welding, cementing and other modes is solved. The method can effectively meet the use requirements of the repaired parts of the logging instrument.

Description

Technical Field

[0001] The invention belongs to the technical field of repairing key parts of well logging instruments, and relates to a method for repairing parts of well logging instruments based on an additive process. Background Art

[0002] The characteristics of the key parts of logging instruments are as follows: 1) easy to wear (threads, housings), easy to scratch (sealing surfaces), easy to break (gears, blades); 2) highly integrated structural functional parts such as machinery, circuits and hydraulics; 3) the material value of the parts is large, the structure is complex, the process is complex, and the processing cycle is long; 4) the maintenance cycle of traditional processes is long, which has become a technology to achieve rapid manufacturing and efficient maintenance of instruments. Usually, traditional equal and subtractive manufacturing has limited means to repair the failure of parts. Metal parts are usually repaired by welding and non-metal parts are repaired by gluing. Due to the limitations of welding process characteristics and part structure shape, the quality of the repaired parts cannot meet the requirements of logging equipment manufacturing and high temperature (175℃ or even more than 200℃) and high pressure (140MPa, or even higher pressure). At present, after the key parts of logging instruments are damaged, they cannot be repaired or the repair efficiency is low using traditional technology, the quality is unstable, and local damage leads to the overall scrapping of parts, resulting in waste of resources. The cost of purchasing and replacing new parts is high and affects the maintenance timeliness. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a method for repairing logging instrument parts based on additive technology, thereby solving the technical problem that after the key parts of the logging instrument are damaged, they cannot be repaired using traditional technology, and local damage leads to the overall scrapping of the parts, resulting in waste of resources. The present invention is achieved through the following technical solutions:

[0004] A method for repairing a well logging instrument component based on an additive process comprises the following steps:

[0005] S1: acquiring point cloud data of the logging instrument part to be repaired, establishing a digital model of the logging instrument part to be repaired according to the point cloud data, comparing the digital model of the logging instrument part to be repaired with the digital model of the complete part, and acquiring the repaired part and the repaired amount;

[0006] S2: According to the repair site and the repair amount, the damaged part of the well logging instrument to be repaired is repaired by using an additive process to achieve stacking and filling of the damaged part;

[0007] S3: Remove support, perform low-temperature quenching and tempering, perform secondary subtractive finishing, and grind and polish the repaired instrument to complete the repair of the logging instrument.

[0008] Preferably, the material of the well logging instrument to be repaired includes metal, ceramic or plastic.

[0009] Preferably, the repair object of the well logging instrument to be repaired includes a sealing surface structure, a thread structure or a hole structure.

[0010] Preferably, before step S1, the damaged part of the well logging instrument to be repaired is also pre-processed, and the pre-processing specifically includes cutting the residual structure of the damaged part, cleaning impurities, and flattening the cross section.

[0011] Preferably, step S3 further includes performing a performance test on the repaired logging instrument, wherein the performance test includes a microstructural defect test on the joints of the repaired components, a multi-dimensional mechanical test, and a vibration resistance test.

[0012] Preferably, the microstructure test includes a micro-density test and a defect test.

[0013] Preferably, the microstructure of the well logging instrument to be repaired is detected by industrial CT scanning, and the scanning accuracy of the industrial CT scanning is 0.02 mm.

[0014] Preferably, the multi-dimensional mechanical test includes a pressure sealing test, a tensile test and a secondary pressure test.

[0015] Preferably, in the tensile test, a tensile force of 30 tons is applied to both ends of the test piece.

[0016] A well logging instrument component is manufactured by repairing using the above repair method.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention discloses a method for repairing parts of a logging instrument based on an additive process. First, the point cloud data of the parts of the logging instrument to be repaired is obtained, and a model of the logging instrument to be repaired is established according to the point cloud data. The model of the logging instrument to be repaired is compared with the complete part model to obtain the repair position and the repair amount. Then, the damaged part of the logging instrument to be repaired is repaired by additive process by using the additive process to achieve stacking and filling of the damaged part. Finally, the support is removed, and low-temperature tempering and secondary subtractive finishing, grinding and polishing are used to complete the repair of the logging instrument. This method effectively uses additive technology to effectively realize the instrument maintenance and manufacturing process flow, has high structural reliability, and is easy to operate. It avoids the problem that the quality of the repaired parts cannot meet the manufacturing requirements of the logging equipment due to the limitations of the welding process characteristics and the structural shape of the parts after the repair by traditional welding, gluing and other methods. This method can effectively meet the use requirements after repair.

[0019] Furthermore, the material of the logging instrument to be repaired includes metal, ceramic or plastic, and can be effectively repaired by using additive manufacturing technology.

[0020] Furthermore, the repair objects of the logging instrument to be repaired include sealing surfaces, threads or holes, and the additive process can effectively meet the needs of repairing fine parts.

[0021] Furthermore, before step S1, the damaged part of the well logging instrument to be repaired is also pre-treated, and the pre-treatment specifically includes cutting the residual structure of the damaged parts, cleaning impurities, and flattening the cross section. This pre-treatment process can effectively improve the quality of the repair and ensure the performance of the instrument after the repair.

[0022] Furthermore, step S3 also includes a performance test of the repaired logging instrument, wherein the performance test includes a microstructure test of the joints of the repaired components, a multi-dimensional mechanical test, and a vibration test. This verification process can ensure that the performance of the repaired instrument meets the use requirements.

[0023] Furthermore, the microstructure includes micro-density and defects, ensuring a dense metallurgical bond between the additively manufactured formed structure and the original component matrix structure, without defects such as cracks, unfused, and pores.

[0024] Furthermore, the microstructure of the well logging instrument to be repaired is detected by industrial CT scanning, and the scanning accuracy of the industrial CT scanning is 0.02 mm, which can effectively detect the microscopic crystal image and defects of the repaired body.

[0025] Furthermore, the multi-dimensional mechanical test includes a pressure sealing test, a tensile test and a secondary pressure test, which can fully test the mechanical properties of the repaired parts.

[0026] Furthermore, in the tensile test, a tensile force of 30 tons is applied to both ends of the test piece, which can fully verify the tensile performance of the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a process of repairing a well logging instrument component based on an additive process in the present invention;

[0029] Figure 2 This is a schematic diagram of the “cross-section growth repair process flow chart” in Example 2 of the present invention;

[0030] Figure 3(a) is a schematic diagram of the structure of the tensile test tool in the present invention, and (b) is an axial cross-sectional view of the tensile test tool;

[0031] Figure 4 (a) is a cross-sectional view of the vibration test tooling of the present invention, and (b) is a schematic structural diagram of the vibration test tooling;

[0032] Figure 5 Schematic diagram of the structures of different parts targeted by the repair method of the present invention, wherein (a) blades (representing parts that are prone to breakage), (b) threads (representing parts that are prone to wear), and (c) rubber plates (representing parts that are prone to scratching);

[0033] Figure 6 This is a schematic diagram of a structure for repairing the outer shell of a coring probe of a well wall coring device in Example 3 of the present invention by adding materials;

[0034] Figure 7 This is a graph showing the results of electron microscope microscopic crystal image analysis of the repaired sample in Example 3 of the present invention;

[0035] Figure 8 This is the pressure-bearing sealing test curve of the cross-section repair sample in Example 3 of the present invention.

[0036] Among them: 1-coring probe housing (worn parts), 2-coring probe housing (repaired parts), 3-additive forming area organization, 4-original part substrate organization, 5-test bench male joint, 6-tooling female joint, 7-left tension rod, 8-tested part, 9-right tension rod, 10-test bench female joint, 11, first locking nut, 12, second locking nut, 13-tested section, 14-pin, 15-fixed mandrel, 16-first gasket, 17-fixing screw, 18-second gasket, 19-tightening nut, 20-fixing seat, 21-tooling chassis, 22-ceramic coil skeleton of the repaired part. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0044] like Figure 1 As shown, the present invention provides a method for repairing a well logging instrument component based on an additive process, comprising the following steps:

[0045] S1: acquiring point cloud data of the logging instrument part to be repaired, establishing a digital model of the logging instrument part to be repaired according to the point cloud data, comparing the digital model of the logging instrument part to be repaired with the digital model of the complete part, and acquiring the repaired part and the repaired amount;

[0046] The material of the well logging instrument to be repaired in the present invention preferably includes metal, ceramic or plastic, and can be effectively repaired by using a material addition process. At the same time, the repair object of the well logging instrument to be repaired includes a sealing surface structure, a thread structure or a hole structure.

[0047] In addition, in order to improve the quality of repair, the damaged part of the well logging instrument to be repaired is pre-processed before step S1, and the pre-processing specifically includes cutting the residual structure of the damaged part, cleaning impurities, and flattening the cross section.

[0048] S2: According to the repair site and the repair amount, the damaged part of the well logging instrument to be repaired is repaired by using an additive process to achieve stacking and filling of the damaged part;

[0049] S3: Remove support, perform low-temperature quenching and tempering, perform secondary subtractive finishing, and grind and polish the repaired instrument to complete the repair of the logging instrument.

[0050] Furthermore, in order to ensure and verify the quality of the repaired instrument, after step S3, the repaired logging instrument is also subjected to performance testing, and the performance testing includes microstructure testing, multidimensional mechanical testing, and vibration resistance testing of the joints of the repaired components. Among them, the microstructure test includes a microdensity test and a defect test. During the microstructure test, the microstructure of the logging instrument to be repaired is detected by industrial CT scanning, and the scanning accuracy of the industrial CT scanning is 0.02 mm. In addition, the multidimensional mechanical test includes a pressure-bearing sealing test, a tensile test, and a secondary pressure-bearing test. In particular, in the tensile test, a tensile force of 30 tons is applied to both ends of the test piece.

[0051] This method effectively uses additive technology to achieve efficient repair and manufacturing of instruments. The repaired structure has high reliability, is easy to operate, fast and efficient, and avoids the problem that after repair by traditional welding, gluing and other methods, the quality of the repaired parts cannot meet the requirements of the manufacturing and use conditions of logging equipment due to limitations such as welding technology and part structure shape. This method can effectively meet the use requirements of logging instrument parts after repair.

[0052] In addition, the present invention also discloses a well logging instrument, which is repaired and manufactured by the repair method of the present invention.

[0053] Example 2

[0054] In order to further explain the technical solution of the present invention, the following is described again by using this embodiment:

[0055] like Figure 2 As shown, a process for repairing a key component of a well logging instrument based on additive manufacturing comprises the following steps:

[0056] S1: Part section pretreatment, specifically using a lathe to cut the remaining structure of the part to be repaired, clean impurities, and flatten the section;

[0057] S2: Additive manufacturing repair, specifically, using local scanning to obtain point cloud data of damaged parts, building a model of the well logging instrument to be repaired based on the point cloud data, and scanning to obtain point cloud data of complete parts, building a model of complete parts based on the point cloud data of complete parts, comparing the well logging instrument model to be repaired with the complete part model, and obtaining the repair site and repair amount; using laser powder feeding additive process for end face growth repair, to achieve layer-by-layer, material gradient stacking filling in the repair area;

[0058] S3: Post-processing: Use low-temperature quenching and tempering, secondary subtractive finishing, and perform secondary processing on the additive repair parts (sealing surfaces, threads, holes, etc.), grinding and polishing to achieve the combination of additive and subtractive processes.

[0059] S4: Process testing: Verify that the ultimate mechanical properties of the additive manufacturing process at the bonding surface and the additive manufacturing part meet the design requirements of the logging instrument. The tests include microscopic inspection, multi-dimensional mechanical testing, and vibration resistance testing. Repair interface process verification: 1) Density and pressure-bearing sealing performance of the additive process bonding surface; 2) Ultimate tensile mechanical properties of the additive process bonding surface; 3) Stability of the cross-section bonding after the additive process is loaded. Specifically, microscopic inspection includes microscopic density inspection and defect inspection of the repaired parts. Industrial CT scanning is used to perform microscopic inspection of the repaired parts with a scanning accuracy of 0.02 mm. Microscopic crystal image inspection is performed on the remelted composite interface to achieve a high-precision repair process method with dense metallurgical bonding between the additive manufacturing forming organization and the original component matrix organization, without defects such as cracks, unfused, and pores.

[0060] The multi-dimensional mechanical tests include: pressure-bearing sealing test, tensile test (the two ends of the repaired parts are subjected to 30-ton tensile test), and secondary pressure-bearing sealing test.

[0061] Pressure sealing test, that is, testing the insulation and sealing performance of the repaired sample, set the pressure to 140Mpa and the test time to 30min;

[0062] During the tensile test, a tensile testing tool was used to apply 30 tons of tensile force to both ends of the repaired sample for testing.

[0063] Secondary pressure test: To conduct secondary insulation and sealing performance tests on the repaired samples after the tensile test.

[0064] The above multi-dimensional mechanical tests are used to verify the reliability and stability of the additive manufacturing process under the extreme mechanical testing conditions of logging parts.

[0065] Vibration test of repaired samples: 6g, 100h. On the electric vibration table, the designed vibration fixture is used to reliably fix the tested piece. Two loading methods, random and scanning, are used. The vibration intensity is 6g (g is the acceleration of gravity) and the duration is 100h. Verify that the additive manufacturing process meets the vibration resistance design requirements for the cross-section growth bonding surface of the repaired part.

[0066] The materials of the repaired parts in the technical solution of the present invention include complex ceramic parts, such as silicon nitride, aluminum oxide, engineering plastics, such as polyetheretherketone resin (PEEK) or polyetheretherketone resin with 30% glass fiber (PEEK GF30), or metals, such as titanium alloy (TC4, TC11), stainless steel (17-4), high-temperature alloy steel (718) or non-magnetic stainless steel (P550).

[0067] like Figure 3 As shown, the present invention also discloses a tension test fixture, which specifically includes a fixture female joint 6, a left tension rod 7 and a right tension rod 9. The tested piece 8 is installed between the left tension rod 7 and the right tension rod 9, and the entire test fixture is installed between the test bench male joint 5 and the test bench female joint 10. The test bench male joint 5 is connected to the left tension rod 7 through the fixture female joint 6. A first locking nut 11 is arranged in the fixture female joint 6. The first locking nut 11 is used to fix the left tension rod 7. The tested piece 8 is fixedly connected to the right tension rod 9 through a second locking nut 12. The tested section 13 is arranged close to the second locking nut 12. The right tension rod 9 is fixedly connected to the test bench female joint 10 through a pin 14. Among them, the left tension rod 7 is a cylindrical long rod, and a thread and a flange are processed on the left end, which is used for connection and positioning with the test bench male joint 5 and the first locking nut 11. A key through groove is processed in the middle position, which is used to tighten the first locking nut 11 and fix the left tension rod 7. The left end of the right tension rod 9 is threaded and connected to the sample 8 under test, and the right side of the right tension rod 9 is processed with a pin hole for connecting the test bench male connector 5. The pin 14 is used to connect the right tension rod 9 to the test bench female connector 10. After the pin 14 is fixed, it is wrapped with tape to prevent the pin 14 from coming out. The tooling female connector 6 and the test bench male connector 5 are used to connect the above-mentioned installed whole to the test bench.

[0068] In addition, if Figure 4As shown, the present invention also discloses a vibration test tool, specifically including a tool chassis 21, a fixing seat 20 is provided on the tool chassis 21, a fixing screw 17 is provided on the fixing seat 20, a second gasket 18 is provided between the fixing seat 20 and the fixing screw 17, a fixing mandrel 15 is also provided on the fixing seat 20, a clamping nut 19 is provided on the outer sleeve of the fixing mandrel 1, and a first gasket 16 is provided between the clamping nut 19 and the fixing screw 17. Assuming that the sample to be tested is a ceramic coil skeleton, the ceramic coil skeleton 22 of the repaired part is fixedly set on the fixing seat 20 and set at the bottom of the fixed mandrel 15. The vibration test process simulates the stress condition of the repaired part when it is installed in the instrument.

[0069] 15-fixed mandrel, 16-first gasket, 17-fixed screw, 18-second gasket, 19-tightening nut, 20-fixed seat, 21-tooling chassis, 22-ceramic coil skeleton of the repaired part.

[0070] like Figure 5 As shown, the technical solution in the present invention is preferably applied to the repair of structural functional failure of parts such as those that are easy to break (such as gears, blades, etc.), easy to wear (such as threads, housings), and easy to scratch (such as sealing surfaces, plates).

[0071] Example 3

[0072] In this embodiment, the outer shell of the coring probe of the well wall coring device is repaired. Figure 6 As shown, Figure 6 (a) is a schematic diagram of the structure of the core probe housing (wearing part) 1, Figure 6 (b) is a schematic diagram of the structure of the core probe housing (repaired part) 2. The microscopic crystal image of the repaired part is analyzed, and the analysis results are shown in Figure 7 ,in, Figure 7 (a) is a 200-fold magnification of the tissue. Figure 7 (b) is a 400-fold magnification of the tissue. Figure 7 It can be seen that the interface between the additively formed area structure 3 and the original part substrate structure 4 is tightly bonded, without microscopic holes, cracks and other defects. Further, the pressure-bearing and sealing properties of the repaired sample were tested, and the pressure-bearing and sealing properties test curve is as follows: Figure 8 As shown, the pressure test index is 140MPa and the pressure test time is 30min. The test results show that all parts of the sample are intact, without deformation or leakage, proving that the joint surface of the sample and the additive manufacturing part of the metal part growth repair process meet the pressure design requirements.

[0073] The technical solution of the present invention solves the application problem of additive manufacturing controllability in the cross-section growth repair process of high-end logging instrument parts and key structural parts, simplifies the maintenance and manufacturing process of instrument parts, has high reliability of repair structure, and improves efficiency; solves the repair design and processing technology design of the damaged part of the wellbore coring logging instrument probe shell, and the repair technology has been tested and verified to meet the requirements of on-site use, reducing the maintenance cost by 80% and shortening the maintenance cycle by 70%; solves the cross-section growth repair problem of complex curved metal parts and non-metallic parts (ceramics, engineering plastics, fiberglass). The technical solution of the present invention solves the problem of fast and efficient maintenance of key parts of high-end logging instruments; realizes a breakthrough in the application of additive manufacturing from shape control to controllability in logging equipment in the field of deep earth exploration; solves the application problem of additive manufacturing controllability in the cross-section growth repair process of metal and non-metallic parts; verifies the reliability and stability of additive manufacturing under the extreme mechanical test conditions of logging parts, and lays a process foundation and mechanical test basis for subsequent additive manufacturing of multiple metals, composite manufacturing of parts and components, and integrated manufacturing of parts.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for repairing well logging instrument parts based on additive manufacturing, characterized in that: The following steps are involved: S1: acquiring point cloud data of the logging instrument part to be repaired, establishing a digital model of the logging instrument part to be repaired according to the point cloud data, comparing the digital model of the logging instrument part to be repaired with the digital model of the complete part, and acquiring the repaired part and the repaired amount; S2: According to the repair site and the repair amount, the damaged part of the well logging instrument to be repaired is repaired by using an additive process to achieve stacking and filling of the damaged part; S3: Remove support, perform low-temperature quenching and tempering, perform secondary subtractive finishing, and grind and polish the repaired instrument to complete the repair of the logging instrument.

2. A method for repairing well logging instrument parts based on additive manufacturing according to claim 1, characterized in that: The material of the well logging instrument to be repaired includes metal, ceramic or plastic.

3. The method for repairing well logging instrument parts based on additive manufacturing process according to claim 1, characterized in that: The repair object of the well logging instrument to be repaired includes a sealing surface structure, a thread structure or a hole structure.

4. The method for repairing well logging instrument parts based on additive manufacturing process according to claim 1, characterized in that: Before step S1, the damaged part of the well logging instrument to be repaired is also pre-processed, and the pre-processing specifically includes cutting the residual structure of the damaged part, cleaning impurities, and flattening the cross section.

5. The method for repairing well logging instrument parts based on additive manufacturing process according to claim 1, characterized in that: The step S3 also includes a performance test on the repaired logging instrument, wherein the performance test includes a microstructure defect test on the joints of the repaired parts, a multi-dimensional mechanical test, and a vibration resistance test.

6. A method for repairing well logging instrument parts based on additive manufacturing according to claim 5, characterized in that: The microstructure test includes a micro-density test and a defect test.

7. The method for repairing well logging instrument parts based on additive manufacturing process according to claim 5, characterized in that: The microstructure of the well logging instrument to be repaired is detected by industrial CT scanning, and the scanning accuracy of the industrial CT scanning is 0.02 mm.

8. The method for repairing well logging instrument parts based on additive manufacturing process according to claim 5, characterized in that: The multi-dimensional mechanical test includes a pressure-bearing sealing test, a tensile test and a secondary pressure-bearing test.

9. A method for repairing well logging instrument parts based on additive manufacturing according to claim 8, characterized in that: In the tensile test, a tensile force of 30 tons is applied to both ends of the test piece.

10. A well logging instrument component, characterized in that: It is prepared by repairing using the repair method described in any one of claims 1 to 9.

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