Tool for descaling and diameter dredging of oil pipe

Abstract

The invention relates to a tool for descaling and diameter dredging of an oil pipe, and belongs to the technical field of descaling and repairing of oil pipes. Comprising a descaling scraper used for descaling the inner wall of the oil pipe and a drift diameter gauge used for conducting drift diameter on the oil pipe, and the descaling scraper is arranged at the front end of the drift diameter gauge so that a scaling layer on the inner wall of the oil pipe can be broken into chippings through the descaling scraper; the outer side wall of the descaling scraper and the outer side wall of the drift diameter gauge are each provided with a chip removal groove allowing chips to pass through, and when the descaling scraper and the drift diameter gauge conduct descaling drift diameter in the oil pipe, the two chip removal grooves are directly or indirectly communicated. When the descaling scraper and the drift diameter gauge are used for descaling and drift diameter in an oil pipe, the two chip removal grooves are directly or indirectly communicated, so that chips are conveniently discharged to the direction opposite to the advancing direction of the tool for descaling and drift diameter in the oil pipe, and the descaling scraper and the drift diameter gauge are prevented from being blocked in the oil pipe.

Description

Technical Field

[0001] The invention relates to a tool for descaling the diameter of an oil pipe, and belongs to the technical field of descaling and repairing the oil pipe. Background Art

[0002] In the oil pipe repair production line, oil pipe descaling and oil pipe diameter adjustment are two processes. The oil pipe descaling process is to remove the scale on the inner wall of the oil pipe to meet the requirements of clean and unobstructed inner wall of the oil pipe; the oil pipe diameter adjustment process is to detect whether the oil pipe body has shrinkage and deformation.

[0003] The existing oil pipe descaling adopts mechanical descaling. The core component of mechanical descaling is the mechanical descaling scraper. The main structure of the mechanical descaling scraper is that two sets of telescopic blades with a central spring support and 90 degrees to each other are installed on the circumferential surface of the cylindrical blade holder. The mechanical descaling scraper is connected to the motor through a connecting rod. When descaling, the motor drives the connecting rod to rotate, thereby driving the mechanical descaling scraper to rotate and scrape the scale layer on the inner wall of the oil pipe. This descaling scraper has the following main disadvantages: First, due to the elasticity of the spring, there is not enough mechanical shear force on the scale layer. After descaling, there is still a thin layer of scale on the scale layer on the inner wall of the oil pipe, and the removal is not thorough. Second, the scraping part of the blade head is welded to the blade head body. When encountering hard scale, it is easy to break and become scrapped.

[0004] The patent document with announcement number CN215169900U discloses an oil pipe descaling scraper, which adopts a combination of a fixed blade head and a spring telescopic blade head. Although it solves the problem of low mechanical shear force of the simple spring blade head, since the fixed blade head is installed in the same blade holder as the telescopic scraper, the strength still cannot meet the need of removing hard scale. Moreover, the removed debris is pushed out of the oil pipe by the blade head. As the descaling scraper moves forward, the debris accumulates more and more, the resistance continues to increase, and the descaling effect is further affected.

[0005] The existing oil pipe diameter gauge is a solid cylinder, which has the disadvantage that when the oil pipe contains oil wax, the solid diameter gauge pushes the oil wax forward and accumulates it, generating great resistance. Even if the oil pipe does not shrink or deform, it cannot pass through the diameter gauge smoothly, and it is impossible to judge whether the oil pipe diameter is qualified.

[0006] At present, oil pipe descaling and oil pipe diameter adjustment are two processes, which have the following main disadvantages: first, the two processes require the establishment of two production workshops, which takes up a large space; second, two sets of production equipment are required, which has a high investment cost; third, judging from the effects of descaling and diameter adjustment alone, there are problems such as incomplete descaling, easy damage to the scraper, and easy jamming of the diameter gauge; fourth, the two production processes of descaling and diameter adjustment are produced independently, which affects production efficiency. Summary of the invention

[0007] The purpose of the present invention is to provide a tool for descaling and dredging an oil pipe, so as to solve the problem that both the existing tools for descaling and dredging an oil pipe are easy to get stuck.

[0008] To achieve the above object, the solution of the present invention includes:

[0009] The present invention discloses a tool for descaling and calibrating an oil pipe, comprising a descaling scraper for descaling the inner wall of the oil pipe and a caliper for calibrating the diameter of the oil pipe. The descaling scraper is arranged at the front end of the caliper so that the descaling scraper can break the scale layer on the inner wall of the oil pipe into debris. The outer walls of the descaling scraper and the caliper are both provided with chip evacuation grooves for the debris to pass through. When the descaling scraper and the caliper are descaling and calipering in the oil pipe, the two chip evacuation grooves are directly or indirectly connected.

[0010] The descaling scraper for descaling the inner wall of the oil pipe in the oil pipe descaling and diameter adjustment tool of the present invention is arranged at the front end of the diameter gauge for adjusting the diameter of the oil pipe, so that the descaling scraper can break the scaling layer on the inner wall of the oil pipe into debris, which is convenient for removing the scaling layer on the inner wall of the oil pipe and avoiding the scaling layer from directly blocking the diameter gauge; the outer side walls of the descaling scraper and the diameter gauge of the present invention are both provided with chip removal grooves for the debris to pass through; as the oil pipe descaling and diameter adjustment tool goes deeper into the oil pipe, the debris cleaned from the scaling layer on the inner wall of the oil pipe by the descaling scraper continues to accumulate and then moves to the outside of the oil pipe; or as the oil pipe descaling and diameter adjustment tool moves out of the oil pipe, the debris is brought out by the oil pipe descaling and diameter adjustment tool; when the descaling scraper and the diameter gauge are descaling and diameter adjustment in the oil pipe, the two chip removal grooves are directly or indirectly connected, which is convenient for the debris to be discharged in the opposite direction of the forward direction of the oil pipe descaling and diameter adjustment tool, preventing the descaling scraper and the diameter gauge from being blocked in the oil pipe.

[0011] Furthermore, the descaling scraper includes a blade holder, the front end of which is a blade head for breaking the scaling layer that blocks the blade head; a scraper is arranged on the side wall of the blade holder for removing the thin scale remaining after being broken by the blade head.

[0012] The descaling scraper of the present invention uses the blade head at the front end of the blade holder to break the scaling layer blocking the blade head, and also uses the scraper on the side wall of the blade holder to remove the thin scale remaining after the blade head breaks, thereby improving the descaling effect of the oil pipe descaling tool of the present invention.

[0013] Furthermore, the tool holder and the diameter gauge are both provided with channels, and a plurality of water spray holes communicating with the channels of the tool holder are provided on the side wall of the tool holder, and the water spray holes are communicated with the two channels.

[0014] The oil pipe descaling and diameter gauge tool of the present invention has a channel opened in the middle of the tool holder and the diameter gauge, and has a plurality of water spray holes on the side wall of the tool holder that are connected to the channel of the tool holder, and the water spray holes are connected to the two channels, so as to facilitate the auxiliary flushing of debris, improve the efficiency and effect of debris discharge, and effectively prevent the descaling scraper and the diameter gauge from being stuck in the oil pipe; wherein the auxiliary flushing water spray holes cooperate with the liquid flow in the two channels to form hydraulic turbulence, improve the ability to carry debris, and further improve the efficiency and effect of debris discharge. Among them, the water spray holes are preferably opened at the chip removal groove of the tool holder, which reduces the hole opening cost, improves the pertinence of the water spray holes, further improves the ability to carry debris, and further improves the efficiency and effect of debris discharge.

[0015] Furthermore, the angle between the central axis of the water spray hole and the central axis of the tool holder channel is toward the front end of the tool holder.

[0016] The angle between the central axis of the water spray hole of the present invention and the central axis of the tool holder channel is toward the front end of the tool holder. The water spray hole toward the front end of the tool holder cooperates with the liquid flow in the two channels to form hydraulic turbulence. By adjusting the angle of the angle, the sand carrying capacity of the hydraulic turbulence is improved, the ability to carry debris is improved, and then the efficiency and effect of debris discharge are improved.

[0017] Furthermore, a blade head window is provided on the outer side wall of the blade holder, and the scraper is telescopically arranged in the blade head window.

[0018] The scraper of the present invention is telescopically arranged in the blade head window on the outer side wall of the blade holder, so as to avoid the scraper from being easily broken and scrapped when it hits hard scaling.

[0019] Furthermore, the tool holder is a cylinder, and the tool head windows are symmetrically opened in pairs on the outer surface of the cylinder. Countersunk grooves are also opened on both sides of the tool head windows, and long holes are opened between the countersunk grooves and adjacent tool head windows to connect the countersunk grooves and the tool head windows. An elastic part is provided between the bottom wall of the tool head window and the scraper, and a fixing part is provided on the scraper to limit the scraper through the long hole so that the fixing part limits the radial movement distance of the scraper.

[0020] The blade windows of the present invention are symmetrically arranged in pairs on the outer surface of the cylindrical tool holder, and countersunk grooves are arranged on both sides of the blade windows, and long holes are arranged between the countersunk grooves and the adjacent blade windows so that the countersunk grooves and the blade windows are connected. An elastic member is arranged between the bottom wall of the blade window and the scraper, and a fixing member is arranged on the scraper to limit the scraper through the long hole so that the fixing member limits the radial movement distance of the scraper. The present invention provides the scraper with a retractable ability through the elastic member, and limits the radial movement distance of the scraper through the fixing member, so as to avoid the scraper from being easily broken and scrapped when it encounters hard scale, thereby increasing the service life of the scraper. Among them, the elastic member is a compression spring; the blade windows can be optionally arranged with 2 or 4 blades, and the number of scrapers matched with it is determined by the number of blade windows. Among them, the countersunk grooves can be optionally opened in the front-to-back direction of the tool head window along the axial direction of the tool holder, or opened in the front-to-back direction of the tool head window along the radial direction of the tool holder; that is, the countersunk grooves are opened along the side walls of the tool head window (excluding the bottom wall of the tool head window), and the countersunk grooves exist in pairs and are symmetrically distributed.

[0021] Furthermore, the fixing part includes a bolt and a nut, the nut end of the bolt is arranged in the countersunk groove on one side of the cutter head window, the screw rod of the bolt passes through the long hole on one side of the cutter head window, the scraper and the long hole on the other side of the cutter head window in sequence, and the other end of the bolt is connected to the nut, which is arranged in the countersunk groove on the other side of the cutter head window.

[0022] The fixing member of the present invention comprises bolts and nuts, and the radial moving distance of the scraper is limited by the bolts and nuts, so that the scraper is prevented from being easily broken and scrapped when it encounters hard scaling, thereby increasing the service life of the scraper.

[0023] Furthermore, the front end of the tool holder is a cone, and a spiral blade edge is provided on the outer surface of the cone to form a tool head at the front end of the tool holder; the spiral blade edge forms a chip removal groove of the descaling scraper.

[0024] The present invention uses the spiral blade at the front end of the blade holder to preferentially break the scaling layer that blocks the cutter head, and uses the scraper to peel off the remaining thin scale from the inner wall of the oil pipe after being broken by the cutter head, thereby improving the scaling effect of the scaling scraper. The spiral blade also forms a chip removal groove of the scaling scraper to provide a channel for the debris to pass through, thereby preventing the scaling scraper and the diameter gauge from being stuck in the oil pipe.

[0025] Furthermore, a double helical groove for forming a chip removal groove of the diameter gauge is provided on the outer surface of the diameter gauge.

[0026] The present invention provides a passage for debris to pass through by combining the spiral characteristics of the double spiral grooves opened on the outer surface of the diameter gauge to form the chip removal grooves of the diameter gauge with the rotating use characteristics of the tool (tool for oil pipe descaling diameter), thereby preventing the descaling scraper and the diameter gauge from getting stuck in the oil pipe.

[0027] Furthermore, the outer diameter of the descaling scraper is smaller than the outer diameter of the diameter gauge, and the front end of the diameter gauge is chamfered so that the outer side walls of the diameter gauge and the descaling scraper do not form a step surface after the two are connected, thereby avoiding the accumulation of debris cleaned by the descaling scraper on the front end surface of the diameter gauge.

[0028] The outer diameter of the descaling scraper of the present invention is smaller than the outer diameter of the diameter gauge, providing relatively sufficient space for the debris broken by the descaling scraper; the front end of the diameter gauge of the present invention is chamfered so that the outer side walls of the diameter gauge and the descaling scraper do not form a step surface after the two are connected, thereby avoiding the accumulation of debris cleaned by the descaling scraper on the front end surface of the diameter gauge, and further avoiding the increase of resistance to the movement of the diameter gauge into the oil pipe due to the accumulation of debris on the front end surface of the diameter gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a tool for descaling the oil pipe of the present invention;

[0030] Figure 2 The present invention Figure 1 The cross-sectional view of AA in FIG.

[0031] Figure 3 The present invention Figure 1 Cross-sectional view of BB in FIG.

[0032] Description of reference numerals:

[0033] 1. Descaling scraper; 101. Descaling scraper cylindrical part (tool holder); 102. Descaling scraper conical part (tool head); 103. Spiral drilling blade (spiral blade); 104. External thread; 105. Telescopic tool head window (tool head window); 106. Oblong hole (a kind of long hole, it can also be a rectangular hole, irregular long hole, etc.); 107. Descaling scraper hollow part (tool holder channel); 108. Water spray hole; 109. Countersunk groove; 110. Spring slot; 111. Telescopic spring (elastic part); 112. Telescopic cutter head (scraper); 113. Fixing bolt (bolt and nut); 114. Boss (bottom wall of cutter head window); 115. Oblong hole; 2. Diffuser gauge: 201. Rear internal thread; 202. Hollow part (channel of the drift gauge); 203. Spiral chip groove (chip groove of the drift gauge); 204. Front internal thread; 205. Chamfered corner (a kind of chamfer, can also be a chamfered corner). DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] An embodiment of a tool for descaling the oil pipe:

[0036] In view of the defects or shortcomings existing in the prior art: first, two production workshops need to be set up for the two processes, which takes up a large space; second, two sets of production equipment need to be set up, and the investment cost is high; third, the effect is poor. When there is slight scaling or repair on the inner wall of the oil pipe, even if the oil pipe body is straight or has no radial deformation, the ordinary diameter gauge cannot pass; fourth, the two production processes of descaling and diameter adjustment affect the production efficiency. A tool for descaling and diameter adjustment of oil pipes is developed to solve the above problems.

[0037] The purpose of the present invention is to provide a tool for oil pipe descaling and diameter adjustment by improving the structure of the oil pipe descaling scraper in view of the incomplete cleaning of the oil pipe and the easy damage of the scraper. The present invention integrates the oil pipe descaling scraper and the diameter gauge according to the same point that both oil pipe descaling and diameter adjustment use a motor to drive a connecting rod to enter the oil pipe and pass through the oil pipe throughout the entire process, and sets a debris cleaning device on the front end of the descaling tool (descaling scraper) and a chip removal spiral groove structure on the rear end of the diameter gauge, so as to realize the combination of the descaling tool and the diameter gauge, so that the two processes are combined into one, reducing the site occupation, reducing equipment investment, and improving work efficiency.

[0038] A tool for descaling the oil pipe, such as Figure 1 As shown, it is composed of a descaling scraper 1 and a diameter gauge 2 from front to back.

[0039] like Figure 2 and Figure 3 As shown, the descaling scraper 1 includes a tool holder with a tapered spiral drilling bit and a telescopic bit installed in the tool holder. The tool holder is a hollow structure, the front end of which is a cone, that is, the descaling scraper cone part 102, and the rear end is a cylinder, that is, the descaling scraper cylinder part 101; the outer surface of the cone 102 is engraved with a spiral drilling edge 103, and the spiral drilling edge 103 is provided with a water spray hole 108 at 30° to the central axis of the tool holder channel, and the water spray hole 108 is connected to the hollow part of the cone ( The hollow part 107 of the descaling scraper is connected, and telescopic blade windows 105 are symmetrically provided on both sides of the circumference of the cylinder. A boss 114 is left at the inner end of the telescopic blade window 105 (blade window), and a groove is processed in the middle of the boss 114; a spring groove 110 is opened at the inner end of the telescopic blade 112, and a telescopic spring 111 is installed between the spring groove 110 at the inner end of the telescopic blade 112 and the groove of the blade window boss 114. The telescopic blade 112 can move radially in the blade window under the action of spring force and compression force.

[0040] Countersunk grooves 109 are provided on both sides of the circumference at a 90° angle to the telescopic tool head window 105, and a pair of oblong holes 106 for passing fixing bolts are provided between the countersunk grooves 109 and the telescopic tool head window 105. A telescopic tool head 112 is installed in the telescopic tool head window 105, and an oblong hole 115 for passing the fixing bolts is provided in the middle of the telescopic tool head 112. The telescopic tool head 112 is fixed in the two telescopic tool head windows 105 of the tool holder by means of fixing bolts 113, the oblong hole 115 in the middle of the telescopic tool head 112, and the oblong holes 106 on both sides of the tool head windows, and the ends of the fixing bolts 113 are placed in the countersunk grooves 109 on both sides of the tool head window.

[0041] The diameter gauge 2 is a hollow cylinder 202 with rounded corners 205 at both ends and spiral chip grooves 203 on the outer circumferential surface. The front end internal thread 204 and the rear end internal thread 201 are respectively processed at both ends of the hollow part 202 of the diameter gauge 2.

[0042] The rear end of the descaling scraper 1 is processed with an external thread 104, and the descaling scraper 1 is connected to the front internal thread 204 at the front end of the diameter gauge 2 through the rear end external thread 104 to form an integrated descaling and diameter tool. The hollow part 202 of the diameter gauge 2 and the hollow part 107 of the descaling scraper are connected to form a water flow channel that runs through the front and back.

[0043] Or the descaling scraper is connected to the external thread at one end of the intermediate connector through the internal thread at the rear end, and the external thread at the other end of the intermediate connector is connected to the internal thread at the front end of the diameter gauge to form a descaling and diameter gauge combination tool. The diameter gauge, the intermediate connector and the descaling scraper are connected, and the hollow parts in the middle of each of them form a water flow channel that runs through the front and back.

[0044] The rear internal thread 201 at the rear end of the diameter gauge 2 is connected to the power equipment through a hollow connecting rod.

[0045] During operation, the rear-end power device drives the hollow connecting rod to rotate, thereby driving the integrated descaling tool (tool for oil pipe descaling) to rotate and enter the oil pipe. The spiral drilling blade 103 at the front end of the descaling scraper 1 rotates and drills the scale on the inner wall of the oil pipe to break the hard and dense scale. At the same time, the high-pressure water provided by the rear-end equipment passes through the hollow water flow channel of the integrated descaling tool, and sprays high-pressure water from the inclined water spray hole 108 at an angle of 30° to the axis in the spiral drilling blade 103 at the front end of the descaling scraper 1 in the forward direction of the scraper, pushing the cut chips forward (moving the chips forward). The oil is discharged from the annular space between the oil pipe and the oil pipe descaling and diameter-adjusting tool of the present invention to the outside of the oil pipe). The inner end of the telescopic cutter head 112 at the rear end of the descaling scraper 1 is provided with a spring groove 110. A telescopic spring 111 is installed between the spring groove 110 at the inner end of the telescopic cutter head and the groove of the cutter head window boss 114. The telescopic cutter head 112 is supported by the elastic force of the telescopic spring 111, and further rotates and scrapes against the inner wall of the oil pipe to completely remove the scale on the inner wall of the oil pipe. The outer circumferential surface of the diameter gauge 2 at the rear end is provided with a spiral chip removal groove 203, which guides the impurities and oil wax in the oil pipe to the rear to avoid jamming. The descaling and diameter-adjusting integrated tool can achieve the simultaneous completion of oil pipe descaling and diameter-adjusting.

[0046] The effects of the present invention are as follows: the oil pipe descaling scraper and the diameter gauge are integrated, the oil pipe diameter is adjusted while descaling, the oil pipe repair process is streamlined, the equipment investment cost and site occupation are reduced, the production efficiency is improved, and the purpose of improving quality and increasing efficiency is achieved; the improved descaling scraper has a tapered spiral scraper head at the front section and an integrated design with the tool holder, which has a greater mechanical shear force than the telescopic scraper tool and can better adapt to scale on the inner wall of the oil pipe with different thicknesses, and then the scraping by the telescopic straight scraper head at the rear section is conducive to the complete peeling off of the scale body from the inner wall of the oil pipe, and the inclined water spray hole designed in the cutter head has a greater spraying force and directionality, which continuously spurts the scraped debris toward the oil pipe outlet; the spiral chip removal groove of the diameter gauge can effectively discharge oil wax or impurities to the rear of the diameter gauge to prevent jamming.

[0047] Application effect and prospect: The poor descaling effect of oil pipes and easy blockage of the diameter are long-term problems that are difficult to solve in the oil pipe repair industry. The descaling and diameter of a single oil pipe take a long time and become a "bottleneck" affecting the overall production efficiency during assembly line operations. The improved descaling scraper adopts a tapered spiral and spring telescopic combined scraper, which is more adaptable to the hard and dense scale on the inner wall of the oil pipe that is difficult to remove, and adapts to the scale on the inner wall of the oil pipe of different thicknesses. Then, the scale on the inner wall of the oil pipe can be completely removed by the sprint of high-pressure water; the spiral chip removal groove on the outer circumferential surface of the diameter gauge can divert the oil wax or impurities in the oil pipe to the rear to prevent blockage; the oil pipe descaling scraper is integrated with the diameter gauge, and the oil pipe diameter is adjusted while descaling, which simplifies the oil pipe repair process, reduces equipment investment costs and site occupation, improves production efficiency, and achieves the purpose of improving quality and efficiency. It has good promotion value in the field of oil pipe repair.

[0048] The oil pipe descaling scraper is integrated with the diameter gauge, and the oil pipe diameter is adjusted while descaling is being carried out, which streamlines the oil pipe repair process, reduces equipment investment costs by more than 700,000 yuan, reduces floor space by 200 square meters, and improves production efficiency by more than 30%, achieving the goal of improving quality and efficiency. The improved descaling scraper has a tapered spiral scraper head at the front end and an integrated design with the tool holder. Compared with the telescopic scraper, it has greater mechanical shear force and can better adapt to scale on the inner wall of the oil pipe of different thicknesses. The scraping of the telescopic straight scraper head at the rear end is conducive to the complete peeling of the scale from the inner wall of the oil pipe. The inclined water spray hole designed in the cutter head has greater spraying force and directionality, and the scraped debris is continuously rushed toward the oil pipe outlet. The spiral chip removal groove of the diameter gauge can effectively discharge oil wax or impurities to the rear of the diameter gauge to prevent jamming and reduce a large amount of maintenance costs caused by equipment damage.

[0049] The invention optimizes the repair process through integrated design of oil pipe diameter and descaling, improves production efficiency, reduces investment and floor space of equipment and auxiliary facilities, and further improves the descaling effect through improved descaling cutters, reduces the scrapping probability of oil pipes due to unclean descaling, and improves the qualified rate of oil pipe repair. This technology has great promotion and application value in the field of oil field oil pipe repair.

Claims

1. A tool for descaling the oil pipe, characterized in that: It comprises a descaling scraper for descaling the inner wall of an oil pipe and a diameter gauge for measuring the diameter of the oil pipe. The descaling scraper is arranged at the front end of the diameter gauge so that the descaling scraper can break the scaling layer on the inner wall of the oil pipe into debris. The outer walls of the descaling scraper and the diameter gauge are both provided with chip removal grooves for the debris to pass through. When the descaling scraper and the diameter gauge are descaling the diameter in the oil pipe, the two chip removal grooves are directly or indirectly connected.

2. The oil pipe descaling tool according to claim 1, characterized in that: The descaling scraper comprises a blade holder, the front end of which is a blade head for breaking the scaling layer that blocks the blade head; a scraper is arranged on the side wall of the blade holder for removing the thin scale remaining after being broken by the blade head.

3. The oil pipe descaling tool according to claim 2, characterized in that: The tool holder and the diameter gauge are both provided with channels, and a plurality of water spray holes communicating with the channels of the tool holder are provided on the side wall of the tool holder, and the water spray holes are communicated with the two channels.

4. The oil pipe descaling tool according to claim 3, characterized in that: The angle between the central axis of the water spray hole and the central axis of the tool holder channel is toward the front end of the tool holder.

5. The oil pipe descaling tool according to claim 2, characterized in that: A cutter head window is provided on the outer side wall of the cutter holder, and the scraper is telescopically arranged in the cutter head window.

6. The oil pipe descaling tool according to claim 5, characterized in that: The tool holder is a cylinder, and the tool head windows are symmetrically opened in pairs on the outer surface of the cylinder. Countersunk grooves are also opened on both sides of the tool head windows, and long holes are opened between the countersunk grooves and the adjacent tool head windows to connect the countersunk grooves and the tool head windows. An elastic part is provided between the bottom wall of the tool head window and the scraper, and a fixing part is provided on the scraper to limit the scraper through the long hole, so that the fixing part limits the radial movement distance of the scraper.

7. The oil pipe descaling tool according to claim 6, characterized in that: The fixing part includes a bolt and a nut, the nut end of the bolt is arranged in a countersunk groove on one side of the cutter head window, the screw rod of the bolt passes through the long hole on one side of the cutter head window, the scraper and the long hole on the other side of the cutter head window in sequence, and the other end of the bolt is connected to a nut, and the nut is arranged in the countersunk groove on the other side of the cutter head window.

8. The oil pipe descaling tool according to any one of claims 2 to 7, characterized in that: The front end of the tool holder is a cone, and a spiral blade is provided on the outer surface of the cone to form the tool head at the front end of the tool holder; the spiral blade forms a chip removal groove of the descaling scraper.

9. The oil pipe descaling tool according to claim 1, characterized in that: A double helical groove for forming a chip removal groove of the diameter gauge is provided on the outer surface of the diameter gauge.

10. The oil pipe descaling tool according to claim 1, characterized in that: The outer diameter of the descaling scraper is smaller than the outer diameter of the diameter gauge, and the front end of the diameter gauge is chamfered so that the outer side walls of the diameter gauge and the descaling scraper do not form a step surface after they are connected, thereby preventing debris cleaned by the descaling scraper from accumulating on the front end surface of the diameter gauge.

Images