Detector for detecting metal outside oil and gas well casing

Abstract

The invention relates to a detector, in particular to a detector for detecting metal outside an oil and gas well casing, and belongs to the technical field of detection devices.The detector comprises a telescopic supporting leg, a positioning adjusting frame is rotationally connected to the upper end of the telescopic supporting leg, an intelligent touch panel is fixedly installed on one side of the positioning adjusting frame, and an up-down structure is arranged in the center of the positioning adjusting frame; an extending threaded pipe is slidably clamped in the up-down structure, a material conveying control structure is designed at the upper end of the extending threaded pipe, an annular material conveying pipe is installed at the lower end of the extending threaded pipe, a painting structure is arranged on the inner side of the annular material conveying pipe, and a sound wave detector is designed on the lower surface of the annular material conveying pipe. The device is suitable for well casings of different specifications, the use convenience of the device is improved, the detection cost of devices of multiple specifications is reduced, an extension threaded pipe is used in cooperation with a painting structure, the outer surfaces of the well casings are coated with repairing materials, the broken positions are temporarily treated, and losses caused by material breaking are reduced.

Description

Technical Field

[0001] The invention relates to a detector, in particular to a detector for detecting metal outside casing of an oil and gas well, belonging to the technical field of detection devices. Background Art

[0002] Oil and gas well casing is a steel pipe used to support the wall of oil and gas wells, and is an important equipment for oil drilling. Oil and gas well casing can be divided into guide tube, surface casing, technical casing and oil layer casing according to its use. Oil and gas well casing plays a vital role in the process of oil drilling and development. With the continuous advancement of technology and the continuous development of the market, the oil and gas well casing industry will face more opportunities and challenges.

[0003] The existing application number is CN202211103141.7, which is a logging instrument for detecting metal outside the casing of an oil and gas well. It includes an anchoring pup joint, a rotating pup joint, and a detecting pup joint connected together from top to bottom. The anchoring pup joint is provided with an anchoring stabilizer, the rotating pup joint is provided with a rotating motor that can drive the rotating pup joint, the detecting pup joint, and the correcting pup joint to rotate together, the detecting pup joint is provided with a detector that can detect the orientation of metal, and the correcting pup joint is provided with a corrector. The invention has a reasonable and compact structure and is easy to use. It fixes the position of the pipe string by setting an anchoring stabilizer, and drives the lower pipe string to rotate by setting a rotating motor, so that the detector can measure the orientation of the metal outside the casing and avoid the increase of measurement error caused by its eccentricity. It is safe, labor-saving, simple and efficient.

[0004] The above-mentioned device improves the efficiency and convenience of monitoring the metal orientation outside the casing. However, when in use, it has poor monitoring and processing effect on the gaps on the well casing, and cannot handle the defects on the well casing. Tools are required to assist in installation and positioning. The device is not convenient to use, and its structure is fixed, the adaptability range is small, and it is one-piece for one use, which places high requirements on the overall structure of the device.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a detector for detecting metal outside the casing of an oil and gas well in order to solve the above-mentioned problem, which can improve the convenience of using the device and the timeliness of treating the damage outside the well casing.

[0007] The present invention achieves the above-mentioned purpose through the following technical scheme: a detector for detecting metal outside the casing of an oil and gas well, comprising a telescopic support leg, the upper end of the telescopic support leg is connected to a positioning and adjustment frame, a smart touch panel is fixedly installed on one side of the positioning and adjustment frame, an upper and lower structure is arranged at the center position of the positioning and adjustment frame, an extended threaded pipe is slidably connected to the inner part of the upper and lower structures, a feeding control structure is designed at the upper end of the extended threaded pipe, an annular feeding pipe is installed at the lower end of the extended threaded pipe, a painting structure is arranged on the inner side of the annular feeding pipe, and an acoustic wave detector is designed on the lower surface of the annular feeding pipe.

[0008] Furthermore, in order to improve the convenience of positioning the device during use, the telescopic leg includes a rotating connecting frame, and the rotating connecting frame and the four corners of the positioning adjustment frame are rotatably clamped to each other, and an electric telescopic rod is rotatably installed inside the rotating connecting frame, and the other end of the electric telescopic rod is provided with a support adapter hole, and a support shaft is rotatably clamped inside the support adapter hole, and positioning support frames are fixedly welded at both ends of the support shaft.

[0009] Furthermore, in order to make the device adapt to the detection operation of well casings of different specifications, the positioning and adjustment frame includes an adjusting positioning tube, a telescopic adjusting rod, a steering connecting plate, a bidirectional screw, a driven bevel gear, an adjusting motor and a driving bevel gear. The adjusting positioning tube is arranged around the device, the telescopic adjusting rod is installed at both ends of the adjusting positioning tube, the two sides of the steering connecting plate are respectively fixedly connected to the telescopic adjusting rods on both sides, the bidirectional screw is installed inside the adjusting positioning tube, the driven bevel gear is welded on the bidirectional screw, the adjusting motor is fixedly arranged on the outside of the adjusting positioning tube, and the driving bevel gear is fixedly and rotatably installed at the center position of the adjusting positioning tube.

[0010] Furthermore, in order to adjust the working range of the positioning and adjustment frame, fixed adapter plates are provided on both sides of the interior of the adjusting positioning tube, a positioning adapter hole is opened in the interior of the fixed adapter plate, the bidirectional screw is rotatably engaged in the interior of the positioning adapter hole, an extension threaded hole is opened on one side of the telescopic adjustment rod, the extension threaded holes are respectively rotatably engaged with the bidirectional screws, the driven bevel gear is located on one side of the driving bevel gear, the driven bevel gear and the driving bevel gear are engaged with each other, a power connection hole is opened at the center position of the adjusting positioning tube, the driving bevel gear is rotatably engaged in the interior of the power connection hole, and the driving bevel gear and the output end of the adjusting motor are fixedly connected to each other.

[0011] Furthermore, in order to control the up and down movement of the extended threaded tube, the upper and lower structures include a lifting threaded tube, a limit clamping hole is provided on the lower side of the adjusting and positioning tube, a limit clamping block is evenly designed on the inner side of the limit clamping hole, a limit sliding groove is evenly provided on the outer side of the extended threaded tube, the limit sliding groove and the limit clamping block are slidably engaged with each other, a lifting power hole is provided on the upper side of the adjusting and positioning tube, the lifting threaded tube is rotatably engaged with the inside of the lifting power hole, the lifting threaded tube and the extended threaded tube are rotatably engaged with each other, a lifting gear ring is fixedly sleeved on the upper end of the lifting threaded tube, a lifting motor is fixedly installed on the upper surface of the adjusting and positioning tube, a power gear is fixedly installed on the output end of the lifting motor, and the power gear and the lifting gear ring are engaged with each other.

[0012] Furthermore, in order to infuse external materials into the inner side of the device, the feed control structure includes a packaging bolt and a high-pressure feed pump, the packaging bolt and the upper end of the extended threaded tube are threadedly connected to each other, a feed hose is fixedly installed on the output end of the high-pressure feed pump, and the other end of the feed hose is rotatably clamped with a close-fitting threaded tube, and the close-fitting threaded tube and the upper end of the extended threaded tube are rotatably engaged with each other.

[0013] Furthermore, in order to output raw materials to the outer surface of the well casing, fixed connecting holes are evenly opened on the upper side of the annular material delivery pipe, a connecting threaded pipe is rotatably clamped inside the fixed connecting hole, the connecting threaded pipe and the extending threaded pipe are threadedly connected to each other, raw material output holes are evenly opened on the inner side of the annular material delivery pipe, a pressurized nozzle is embedded and installed inside the raw material output hole, and fixed hanging rings are evenly arranged on the lower surface of the annular material delivery pipe.

[0014] Furthermore, in order to improve the material application effect, the painting structure includes a positioning clamp ring, which is slidably clamped on both sides of the pressurized nozzle, and a paint brush is fixedly installed on the inner side of the positioning clamp ring, and the interior of the positioning clamp ring is evenly provided with combined threaded holes, and the interior of the combined threaded holes is rotatably engaged with combined bolts, and the upper surface of the ultrasonic detector is designed with an installation slot, and the installation slot and the fixed hanging ring are slidably engaged with each other, and a fixing socket is opened inside the installation slot, and a fixing bolt is slidably clamped inside the fixing socket, and the fixing bolt passes through the fixed hanging ring, and the other end of the fixing bolt is fitted and engaged with a fixing nut.

[0015] The technical effects and advantages of the present invention are as follows: through the positioning and adjusting frame, the use range of the device can be flexibly adjusted, and the annular feed pipes of different sizes can be adapted to well casings of different specifications, thereby improving the convenience of using the device and reducing the detection cost of devices of multiple specifications. The extended threaded pipe is used in combination with the painting structure to apply repair material on the outer surface of the well casing, and the broken position detected by the ultrasonic detector is temporarily treated to reduce the loss caused by material breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a side cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the positioning and adjusting frame part of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the telescopic leg part of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the annular material conveying pipe part in the present invention;

[0021] Figure 6 It is a side cross-sectional structural schematic diagram of the painting structure part in the present invention;

[0022] Figure 7 It is a schematic diagram of the combined structure of the painting structure part in the present invention;

[0023] Figure 8 It is a partial structural schematic diagram of the painting structure in the present invention;

[0024] Fig. 9 It is a structural schematic diagram of the acoustic wave detector part in the present invention.

[0025] In the figure: 1. Telescopic legs; 101. Rotating connection frame; 102. Electric telescopic rod; 103. Positioning support frame; 2. Positioning adjustment frame; 201. Adjusting positioning tube; 202. Telescopic adjustment rod; 203. Steering connection plate; 204. Bidirectional screw; 205. Driven bevel gear; 206. Adjusting motor; 207. Driving bevel gear; 3. Smart touch panel; 4. Upper and lower structures; 401. Lifting threaded tube; 402. Lifting gear ring; 403, lifting motor; 5, extension threaded pipe; 6, feeding control structure; 601, packaging bolt; 602, high-pressure feeding pump; 603, feeding hose; 604, close-fitting threaded pipe; 7, annular feeding pipe; 701, connecting threaded pipe; 702, pressurized nozzle; 703, fixing hanging ring; 704, fixing bolt; 8, painting structure; 801, positioning clamp ring; 802, paint brush; 803, combination bolt; 9, ultrasonic detector. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0027] See also Figure 1-Figure 9 As shown, a detector for detecting metal outside the casing of an oil and gas well includes a telescopic leg 1, which provides stable support so that the detector can be firmly fixed on the wellhead or well wall of the oil and gas well, and the height can be adjusted according to the well depth and operation requirements. The upper end of the telescopic leg 1 is connected with a positioning adjustment frame 2 for fixing and supporting other components of the detector, such as an intelligent touch panel 3, an extended threaded tube 5, etc., and the angle and position can be adjusted as needed to ensure that the detector can accurately aim at the target area. An intelligent touch panel 3 is fixedly installed on one side of the positioning adjustment frame 2 as the control center of the detector, which is used to set parameters, start and stop detection, view detection results, etc. Through touch operation, the user can conveniently control various functions of the detector. An upper and lower structure 4 is arranged at the center of the positioning adjustment frame 2, and an extended threaded tube 5 is slidably connected inside the upper and lower structures 4 as the "arm" of the detector, which is slidably connected to the upper and lower structures 4, it can move up and down to adjust the position of the annular material delivery pipe 7 and the painting structure 8 so that they can reach the designated position outside the oil and gas well casing. The upper end of the extended threaded pipe 5 is designed with a material delivery control structure 6, which is responsible for delivering materials such as cleaning agents, detection agents, etc. required for cleaning or detection to the annular material delivery pipe 7 and controlling its flow rate and speed. The lower end of the extended threaded pipe 5 is installed with an annular material delivery pipe 7, which evenly applies the materials delivered by the material delivery control structure 6 to the outside of the oil and gas well casing, providing the necessary medium for the painting structure 8 and the acoustic wave detector 9. The inner side of the annular material delivery pipe 7 is provided with a painting structure 8, which uses physical friction and chemical action to clean the dirt, rust and other impurities on the outside of the oil and gas well casing, and improves the detection accuracy of the acoustic wave detector 9. The lower surface of the annular material delivery pipe 7 is designed with an acoustic wave detector 9, which uses acoustic wave technology to detect the metal structure outside the oil and gas well casing and evaluate its key indicators such as thickness, integrity, and corrosion degree.

[0028] The telescopic leg 1 includes a rotating connection frame 101, which serves as a bridge connecting the positioning and adjustment frame 2 and the electric telescopic rod 102, allowing the electric telescopic rod 102 to rotate within a certain range, thereby adjusting the inclination angle or direction of the detector to adapt to the shape and angle of different wellheads. The rotating connection frame 101 and the four corners of the positioning and adjustment frame 2 are rotatably connected to each other, and the electric telescopic rod 102 is installed inside the rotating connection frame 101 to provide a telescopic function. The length change is achieved through electric drive to adjust the height of the detector. A support adapter hole is opened at the other end of the electric telescopic rod 102, and a support shaft is rotatably connected inside the support adapter hole. Positioning support frames 103 are fixedly welded at both ends of the support shaft as the bottom support structure of the detector, which is in direct contact with the wellhead or well wall to provide stable supporting force. The design of the positioning support frame 103 usually takes anti-slip and wear resistance into consideration to ensure that the detector does not slip or move during operation.

[0029] The positioning and adjustment frame 2 includes an adjusting and positioning tube 201, a telescopic adjustment rod 202, a steering connecting plate 203, a bidirectional screw 204, a driven bevel gear 205, an adjusting motor 206 and a driving bevel gear 207. The adjusting and positioning tube 201 is arranged around the device as the main structure of the positioning and adjustment frame 2, providing stable support and connection points, and accommodating transmission components such as the bidirectional screw 204 and the driving bevel gear 207. The telescopic adjustment rod 202 is installed at both ends of the adjusting and positioning tube 201. The change of the telescopic length is achieved by rotating the bidirectional screw 204, so as to adjust the position or angle of the detector in different directions. The two sides of the steering connecting plate 203 are respectively fixedly connected to the telescopic adjustment rods 202 on both sides, connecting the telescopic adjustment rods 202 on both sides to ensure that they maintain synchronous movement during the adjustment process, and at the same time provide additional support and stability. The bidirectional screw 204 is installed inside the adjusting and positioning tube 201, the driven bevel gear 205 is welded on the bidirectional screw 204, and the adjusting motor 206 is fixedly arranged on the outside of the adjusting and positioning tube 201 , providing a power source, and realizing the rotation of the bidirectional screw 204 by meshing the driving bevel gear 207 with the driven bevel gear 205, and the driving bevel gear 207 is fixedly rotatably installed at the center position of the adjustment positioning tube 201, and the adjustment positioning tube 201 is provided with fixed adapter plates on both sides thereof, and the fixed adapter plates are provided with positioning adapter holes inside, and the bidirectional screw 204 is rotatably connected to the inside of the positioning adapter holes, and an extension threaded hole is provided on one side of the telescopic adjustment rod 202, and the extension threaded hole is respectively rotatable with the bidirectional screw 204 The driven bevel gear 205 is located on one side of the driving bevel gear 207, and the driven bevel gear 205 and the driving bevel gear 207 are meshed with each other to transmit the power of the adjusting motor 206 to the bidirectional screw 204. A power connection hole is provided at the center of the adjusting positioning tube 201, and the driving bevel gear 207 is rotatably engaged with the inside of the power connection hole, and the driving bevel gear 207 and the output end of the adjusting motor 206 are fixedly connected to each other.

[0030] The upper and lower structures 4 include a lifting threaded tube 401, a limiting card hole is provided on the lower side of the adjusting and positioning tube 201, a limiting card block is evenly designed on the inner side of the limiting card hole, and a limiting slide groove is evenly provided on the outer side of the extending threaded tube 5, and the limiting slide groove and the limiting card block are slidably engaged with each other, the limiting card block is designed in the limiting card hole of the adjusting and positioning tube 201, and the limiting slide groove is provided on the outer side of the extending threaded tube 5, during the lifting process, the limiting card block slides along the limiting slide groove, plays a role in guiding and stabilizing the extending threaded tube 5, and prevents it from shaking or deflecting during the lifting process, a lifting power hole is provided on the upper side of the adjusting and positioning tube 201, and the lifting threaded tube 401 is rotatably engaged with the inner side of the lifting power hole, the lifting threaded tube 401 and the extending threaded tube 5 are rotatably engaged with each other, and the lifting threaded tube 401 and the extending threaded tube 5 are engaged with each other. The extended threaded tubes 5 are rotated and meshed with each other through threads. When the lifting threaded tube 401 rotates, due to the interaction of the threads, the extended threaded tube 5 will generate a lifting movement in the vertical direction. This design can ensure the stability and accuracy of the lifting. The upper end of the lifting threaded tube 401 is fixedly sleeved with a lifting gear ring 402, and the upper surface of the adjusting and positioning tube 201 is fixedly installed with a lifting motor 403. The output end of the lifting motor 403 is fixedly installed with a power gear, and the power gear and the lifting gear ring 402 are meshed with each other. When the lifting motor 403 is started, the power gear will drive the lifting gear ring 402 to rotate, and then drive the lifting threaded tube 401 to rotate. The speed and direction of the lifting motor 403 can be accurately adjusted by the control system, thereby realizing accurate control of the lifting speed and direction.

[0031] The material feeding control structure 6 includes a packaging bolt 601 and a high-pressure feeding pump 602. The packaging bolt 601 is threadedly connected to the upper end of the extended threaded tube 5. This connection method not only ensures the stability and firmness of the structure, but also facilitates disassembly and maintenance. The design of the packaging bolt 601 also allows the internal structure to be adjusted or replaced when necessary. The output end of the high-pressure feeding pump 602 is fixedly installed with a feed hose 603. The high-pressure feeding pump 602 is the core component of material transportation. It generates sufficient pressure through its internal working mechanism to transport the material from the input end to the output end. In this structure, the output end of the high-pressure feeding pump 602 is fixedly installed A feed hose 603 is installed to transport the material to the close-fitting threaded tube 604. The other end of the feed hose 603 is rotatably clamped with the close-fitting threaded tube 604. The close-fitting threaded tube 604 and the upper end of the extended threaded tube 5 are rotatably engaged with each other. When the high-pressure feed pump 602 is started, the material is sucked into the pump body and, after being pressurized, is transported to the close-fitting threaded tube 604 through the feed hose 603. Due to the close connection between the close-fitting threaded tube 604 and the extended threaded tube 5, the material can smoothly enter the extended threaded tube 5. This structure not only realizes the stable transportation of materials, but also meets the needs of different operating scenarios through precise control and adjustment.

[0032] The upper side of the annular conveying pipe 7 is evenly provided with fixed connecting holes, and a connecting threaded pipe 701 is rotatably connected inside the fixed connecting hole. The connecting threaded pipe 701 and the extended threaded pipe 5 are threadedly connected to each other. This design allows the annular conveying pipe 7 to be flexibly connected to the extended threaded pipe 5, while ensuring the continuity and stability of material transportation. The inner side of the annular conveying pipe 7 is evenly provided with raw material output holes, and a pressurized nozzle 702 is embedded and installed inside the raw material output holes. The pressurized nozzle 702 uses an internal high-pressure mechanism to evenly spray the material in the form of mist, stream or granules. This design not only improves the spraying efficiency and uniformity of the material, but also allows precise control of the spraying range and density of the material. Fixed hanging rings 703 are evenly provided on the lower surface of the annular conveying pipe 7. When the material enters the annular conveying pipe 7 through the extended threaded pipe 5 and the connecting threaded pipe 701, it will flow along the inside of the annular conveying pipe 7 and be evenly sprayed through the raw material output hole and the pressurized nozzle 702.

[0033] The painting structure 8 includes a positioning clamp ring 801, which is slidably clamped on both sides of the pressurized nozzle 702. The positioning clamp ring 801 is slidably clamped on both sides of the pressurized nozzle 702. This design allows the paint brush 802 to fit tightly on the surface to be painted, while ensuring that the paint can be evenly sprayed from the pressurized nozzle 702 and painted on the surface. The sliding clamping method of the positioning clamp ring 801 also allows flexible adjustment according to the shape and size of the painting surface. The paint brush 802 is fixedly installed on the inner side of the positioning clamp ring 801. The paint brush 802 is fixed on the inner side of the positioning clamp ring 801 and is used to evenly apply the paint on the surface. The interior of the positioning clamp ring 801 is evenly provided with combined threaded holes The combined threaded hole is internally rotatably engaged with a combined bolt 803, and the upper surface of the acoustic wave detector 9 is designed with a mounting slot, and the mounting slot and the fixed hanging ring 703 are slidably engaged with each other, and a fixed socket is provided inside the mounting slot, and a fixing bolt 704 is slidably engaged inside the fixed socket, and the fixing bolt 704 passes through the fixed hanging ring 703, and the other end of the fixing bolt 704 is fitted and engaged with a fixing nut. This design allows the acoustic wave detector 9 to be firmly fixed to the annular feed pipe 7 or other supporting structures while maintaining a certain degree of flexibility for easy adjustment and disassembly. When the paint is sprayed from the pressurized nozzle 702, the paint brush 802 will evenly spread it on the surface to achieve efficient paint operations.

[0034] When in use, the detector is transported to the oil and gas well site, and the height of the telescopic legs 1 is adjusted according to the well depth and operation requirements. The detection parameters, such as detection depth, material flow, sound wave frequency, etc., are set through the intelligent touch panel 3. The positioning adjustment frame 2 of the detector is fixed to the wellhead or the well wall to ensure that the detector can work stably. The position of the extended threaded pipe 5 is adjusted as needed to enable it to reach the specified position outside the oil and gas well casing. The material feeding control structure 6 is started through the intelligent touch panel 3 to feed the materials required for cleaning or testing to the annular material feeding pipe 7, and the painting structure 8 is started to clean the outside of the oil and gas well casing. Carry out cleaning, start the sonic wave detector 9, detect the cleaned metal structure, view the detection results of the sonic wave detector 9 on the intelligent touch panel 3, including the thickness, integrity, corrosion degree and other indicators of the metal structure, evaluate and analyze the metal structure outside the oil and gas well casing according to the detection results, formulate corresponding maintenance or repair plans, and use the material feeding control structure 6 to pass the repair fluid through the extended threaded pipe 5 and the painting structure 8 to temporarily repair the metal damage, reduce the loss caused by the damage, turn off all functions of the detector, clean the site, and transport the detector back to the designated location for storage and maintenance.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A detector for detecting metal outside casing of an oil and gas well, comprising a telescopic support leg (1), characterized in that: The upper end of the telescopic leg (1) is connected to a positioning and adjusting frame (2), a smart touch panel (3) is fixedly mounted on one side of the positioning and adjusting frame (2), an upper and lower structure (4) is arranged at the center of the positioning and adjusting frame (2), an extension threaded tube (5) is slidably engaged inside the upper and lower structures (4), a feed control structure (6) is arranged at the upper end of the extension threaded tube (5), an annular feed pipe (7) is installed at the lower end of the extension threaded tube (5), a paint structure (8) is arranged on the inner side of the annular feed pipe (7), and an acoustic wave detector (9) is arranged on the lower surface of the annular feed pipe (7).

2. The detector for detecting metal outside the casing of an oil and gas well according to claim 1 is characterized in that: The telescopic leg (1) comprises a rotatable connection frame (101), the rotatable connection frame (101) and the four corners of the positioning and adjusting frame (2) are rotatably connected to each other, an electric telescopic rod (102) is rotatably installed inside the rotatable connection frame (101), the other end of the electric telescopic rod (102) is provided with a support adapter hole, the support adapter hole is rotatably connected to a support shaft inside, and positioning support frames (103) are fixedly welded to both ends of the support shaft.

3. The detector for detecting metal outside the casing of an oil and gas well according to claim 2, characterized in that: The positioning and adjusting frame (2) comprises an adjusting and positioning tube (201), a telescopic adjusting rod (202), a steering connecting plate (203), a bidirectional screw (204), a driven bevel gear (205), an adjusting motor (206) and a driving bevel gear (207); the adjusting and positioning tube (201) is arranged around the device; the telescopic adjusting rod (202) is installed at both ends of the adjusting and positioning tube (201); the two sides of the steering connecting plate (203) are respectively fixedly connected to the telescopic adjusting rod (202) at both sides; the bidirectional screw (204) is installed inside the adjusting and positioning tube (201); the driven bevel gear (205) is welded to the bidirectional screw (204); the adjusting motor (206) is fixedly arranged on the outside of the adjusting and positioning tube (201); and the driving bevel gear (207) is fixedly and rotatably installed at the center of the adjusting and positioning tube (201).

4. The detector for detecting metal outside the casing of an oil and gas well according to claim 3 is characterized in that: Fixed adapter plates are provided on both sides of the interior of the adjustment and positioning tube (201), and a positioning adapter hole is provided inside the fixed adapter plate. The bidirectional screw rod (204) is rotatably engaged in the interior of the positioning adapter hole. An extension threaded hole is provided on one side of the telescopic adjustment rod (202), and the extension threaded holes are respectively rotatably engaged with the bidirectional screw rod (204). The driven bevel gear (205) is located on one side of the driving bevel gear (207), and the driven bevel gear (205) and the driving bevel gear (207) are engaged with each other. A power connection hole is provided at the center of the adjustment and positioning tube (201), and the driving bevel gear (207) is rotatably engaged in the interior of the power connection hole. The driving bevel gear (207) and the output end of the adjustment motor (206) are fixedly connected to each other.

5. The detector for detecting metal outside the casing of an oil and gas well according to claim 3 is characterized in that: The upper and lower structures (4) include a lifting threaded tube (401), a limit clamping hole is provided on the lower side of the adjusting and positioning tube (201), a limit clamping block is uniformly designed on the inner side of the limit clamping hole, a limit sliding groove is uniformly provided on the outer side of the extending threaded tube (5), the limit sliding groove and the limit clamping block are slidably engaged with each other, a lifting power hole is provided on the upper side of the adjusting and positioning tube (201), the lifting threaded tube (401) is rotatably engaged with the inside of the lifting power hole, the lifting threaded tube (401) and the extending threaded tube (5) are rotatably engaged with each other, a lifting gear ring (402) is fixedly sleeved on the upper end of the lifting threaded tube (401), a lifting motor (403) is fixedly installed on the upper surface of the adjusting and positioning tube (201), a power gear is fixedly installed on the output end of the lifting motor (403), and the power gear and the lifting gear ring (402) are engaged with each other.

6. The detector for detecting metal outside casing of oil and gas wells according to claim 1, characterized in that: The material delivery control structure (6) includes a packaging bolt (601) and a high-pressure material delivery pump (602), wherein the packaging bolt (601) and the upper end of the extended threaded tube (5) are threadedly connected to each other, and a feed hose (603) is fixedly installed at the output end of the high-pressure material delivery pump (602), and the other end of the feed hose (603) is rotatably clamped with a close-fitting threaded tube (604), and the close-fitting threaded tube (604) and the upper end of the extended threaded tube (5) are rotatably engaged with each other.

7. The detector for detecting metal outside the casing of an oil and gas well according to claim 1, characterized in that: The upper side of the annular material delivery pipe (7) is uniformly provided with fixed connecting holes, a connecting threaded tube (701) is rotatably connected inside the fixed connecting hole, the connecting threaded tube (701) and the extending threaded tube (5) are threadedly connected to each other, the inner side of the annular material delivery pipe (7) is uniformly provided with raw material output holes, a pressurized nozzle (702) is embedded inside the raw material output hole, and the lower surface of the annular material delivery pipe (7) is uniformly provided with fixed hanging rings (703).

8. The detector for detecting metal outside the casing of an oil and gas well according to claim 7, characterized in that: The painting structure (8) includes a positioning clamp (801), and the positioning clamp (801) is slidably engaged with both sides of the pressurized nozzle (702). A paint brush (802) is fixedly installed on the inner side of the positioning clamp (801). The interior of the positioning clamp (801) is evenly provided with combined threaded holes, and the interior of the combined threaded holes is rotatably engaged with a combined bolt (803). The upper surface of the acoustic wave detector (9) is designed with a mounting slot, and the mounting slot and the fixed hanging ring (703) are slidably engaged with each other. A fixed socket is provided inside the mounting slot, and a fixing bolt (704) is slidably engaged inside the fixing socket. The fixing bolt (704) passes through the fixing hanging ring (703), and the other end of the fixing bolt (704) is fitted and engaged with a fixing nut.

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