Composite abrasive polishing tool for ultra-deep well drill pipe surface treatment and use method

Abstract

The present invention relates to the technical field of composite abrasive polishing of drill pipe surfaces, and discloses a composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes and a method for using the tool. The tool comprises a platform, wherein the bottom end of the platform is symmetrically fixedly connected to two bases, and grooves are formed at the outer sides of the two bases and at the connection points with the platform. The upper part of the platform is symmetrically provided with two support members, and the two support members can slide toward each other on the upper part of the platform and support the inner wall of the drill pipe. Polishing members are slidably connected to both sides of the platform along the extension direction of the platform. The present invention can locate the inner wall of drill pipes of different sizes through the support members, facilitate the positioning of drill pipes of different specifications, and cooperate with the polishing members for grinding operations, which can effectively improve the grinding efficiency of the drill pipe; and under the action of a grinding belt made of a composite abrasive mixture, it can adapt to grinding drill pipes of different diameters, and can also rotate the drill pipe after completing a single grinding operation with the cooperation of the polishing members to achieve all-round grinding of the drill pipe.

Description

Technical Field

[0001] The invention relates to the technical field of composite abrasive polishing of drill pipe surfaces, and in particular to a composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes and a use method thereof. Background Art

[0002] Ultra-deep well drill pipe is a core piece of equipment for deep earth exploration. It consists of a seamless steel pipe body and tool joints. Thickening treatments (internal or external thickening, or both) enhance connection strength. The drill pipe rotates to transmit surface power to the drill bit, driving it to break the formation rock. In ultra-deep wells, the drill pipe must bear even greater deadweight loads.

[0003] When the drill pipe rotates or moves up and down within the wellbore, its rough outer surface creates intense friction with the wellbore wall, leading to energy loss and wear. Therefore, the drill pipe's outer surface needs to be polished. This smooth surface reduces the adhesion of cuttings and mud, avoids the risk of sticking, reduces friction, and ultimately improves drilling efficiency.

[0004] The polishing tool carries abrasive particles and rotates at high speed, generating friction with the surface of the drill pipe, cutting and removing the surface oxide layer, burrs and dents, and gradually smoothing the rough peaks.

[0005] Therefore, in order to improve the polishing efficiency of the ultra-deep well drill pipe surface and to be able to position and adaptively polish drill pipes of different specifications, a composite abrasive polishing tool and a method of use for ultra-deep well drill pipe surface treatment are proposed. Summary of the Invention

[0006] In order to solve the technical problems raised in the background technology, the present invention provides a composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes and a method of use.

[0007] The present invention is realized by adopting the following technical solution: a composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes comprises a platform, a support member and a polishing member.

[0008] The bottom end of the platform is symmetrically fixed with two bases, and there are grooves on the outer sides of the two bases at the connection with the platform. Two support members are symmetrically arranged on the upper part of the platform. The two support members can slide toward each other on the upper part of the platform and support the inner wall of the drill rod. Polishing parts are slidably connected on both sides of the platform along the extension direction of the platform. The polishing parts can fit the outer wall of the drill rod and grind the drill rod as the polishing parts slide horizontally.

[0009] After the polishing part completes grinding the upper outer wall of the drill rod, the polishing part can continue to move vertically downward, and its bottom end can further fit the drill rod, and the drill rod can be driven to flip when the support parts on both sides are loosened, so that the unpolished outer wall of the drill rod is rotated to the upper part, and the polishing part is started again to grind the drill rod.

[0010] As a further improvement of the above scheme, the support member includes a displacement unit and an expansion unit. The displacement unit includes slide bars symmetrically fixedly connected to both sides of the upper end of the platform. The slide bars are parallel to the extension direction of the platform. Connecting openings are opened on both sides of the two slide bars. The top ends of the two slide bars are horizontally slidably connected to movable plates. The bottom ends of the two movable plates are fixedly connected to the bottom slide plate. The bottom slide plate slides horizontally in the connecting opening, and a threaded groove is opened at the bottom slide plate below the platform. One side of the platform is fixedly connected to motor 1, and the output shaft of motor 1 is fixedly connected to a bidirectional screw rod. The two sides of the bidirectional screw rod are respectively threadedly connected to the threaded grooves of the bottom slide plate for synchronously driving the two movable plates to slide toward each other.

[0011] Specifically, pulleys are provided at the connection points between the bottom sides of the movable plate and the top of the platform.

[0012] The tops of the two movable plates are fixedly connected to two hydraulic rods 1, the tops of the two hydraulic rods 1 are fixedly connected to the top plate, the top of the top plate is installed with a hydraulic rod 2, the hydraulic rod 2 is fixedly connected to the bracket 1 outside, and the hydraulic rod 2 is fixed by a pair of brackets, and the output end of the hydraulic rod 2 faces the inside of the platform.

[0013] As a further improvement of the above scheme, the expansion unit includes a sleeve coaxially fixedly connected to one side of the hydraulic rod 2, and a circular plate is fixedly connected to the outer side of the sleeve. Several groups of vertical grooves are opened in the circumference of the circular plate, and the number of vertical grooves is at least three groups. A limiting slide is connected to the radial sliding of the circular plate in each vertical groove. Specifically, the limiting slide can only slide horizontally along the vertical groove. Each limiting slide is fixedly connected to a side connecting rod outside the circular plate, and each side connecting rod is parallel to the end face of the circular plate. The outer end of each side connecting rod is fixedly connected to a support plate, and a rubber strip is provided at the connection between the outside of the support plate and the inner wall of the drill pipe.

[0014] The output end of the hydraulic rod 2 is located outside the circular plate and is fixedly connected to a movable block. The outer wall of the movable block is circumferentially fixedly connected to several side plates. The number of side plates is the same as the number of vertical slots. Each side plate is provided with an obliquely inclined inclined slot. Each inclined slot is slidably connected to a slide rod 1. Each slide rod 1 is fixedly connected to the side connecting rod. When the output end of the hydraulic rod 2 is extended or retracted, the multiple support plates are synchronously slid outward / inward under the sliding connection between the inclined slot and the slide rod 1, so as to support the inner wall of the drill pipe and rotate in conjunction with the polishing part when the support is released.

[0015] As a further improvement of the above scheme, the polishing part includes a bracket 2 fixedly connected to one side of the platform, the top of the bracket 2 is fixedly connected to the motor 2, the output shaft of the motor 2 is fixedly connected to the screw, the screw is threadedly connected to the connecting plate, the two sides of the connecting plate are symmetrically fixedly connected to the hydraulic rods 3, the bottom ends of the two hydraulic rods 3 are fixedly connected to the side slides, and the two side slides are symmetrically and horizontally slidably connected to the groove outside the platform.

[0016] The top ends of the two hydraulic rods are respectively fixedly connected with outer plates, the inner sides of the two outer plates are symmetrically fixedly connected with guide plates, horizontal grooves are symmetrically opened on both sides of the two guide plates, and the two horizontal grooves are symmetrically and horizontally slidably connected with slide rods 2, and the two slide rods 2 are located in the middle of the two guide plates and are respectively fixedly connected with two folding frames on both sides, the middle of the top of the two groups of folding frames are rotatably connected with active rollers, and the bottom ends of the two groups of folding frames are respectively rotatably connected with driven rollers, and the outer shells of the two driven rollers and one active roller are provided with grinding belts, wherein the active roller and the driven roller are provided with protrusions, and the connection between the grinding belt and the three is provided with grooves matching the protrusions to increase transmission friction, and the two groups of folding frames Both sides of the guide plate are symmetrically fixed with hanging rods, and the two hanging rods on the same side are provided with hanging springs for maintaining the tension of the grinding belt. Rubber protrusions are provided on both sides of the outer walls of the two driven rollers, which are used to cooperate with the rubber protrusions to bend and abut against the outer wall of the drill rod when the hydraulic rod three drives the entire outer plate to move downward. A bracket three is fixedly connected to the middle of the outer wall of one of the guide plates. The longitudinal section of the bracket three is L-shaped. A vertical vertical groove two is provided in the middle of the upper section of the bracket three. A connecting block is vertically slidably connected to the vertical groove two. A sliding frame is fixedly connected to one side of the connecting block. The bottom end of the sliding frame is fixedly connected to a motor three. The output end of the motor three is coaxially fixedly connected to the active roller.

[0017] The method of using the composite abrasive polishing tool for ultra-deep well drill pipe surface treatment is as follows:

[0018] S1. Drill rod delivery and positioning: After the drill rod is delivered to the top of the platform, the two support members are activated to move and the inner walls at both ends of the drill rod are stretched and fixed. Specifically, the first motor is started to drive the bidirectional screw to rotate, so that the bottom slide plate can slide inward and retract synchronously. When the movable plate drives the top hydraulic rod 2 to move to the two ends of the drill rod, the two hydraulic rods 2 are driven to retract and retract. When the side plates are driven by the movable block to move at the retractable end of the hydraulic rod 2, multiple support plates are synchronously driven to slide outward and press against the inner wall of the drill rod.

[0019] S2, drill rod polishing: While driving the polishing piece to move horizontally, it also grinds the upper part of the drill rod. Specifically, start Motor 2 to drive the screw to drive the entire polishing piece to slide along the platform. After sliding to the edge of the drill rod, drive Hydraulic Rod 3 downward to retract. As the bottom of the grinding belt descends, it will contact the upper part of the drill rod and gradually fit the surface of the drill rod. Driven by Motor 3, the outer part of the grinding belt grinds the drill rod. During the grinding process, Motor 2 will rotate in an orderly manner, causing the entire Hydraulic Rod 3 to slide to the other end of the drill rod, completing the grinding of the contact area on the upper part of the drill rod.

[0020] S3. Rotating and polishing the drill rod: After a single drill rod polishing is completed, the drill rod is rotated in cooperation with the polishing member and the support member. The polishing member slides back and forth to finally complete the comprehensive polishing of the drill rod. Specifically, the hydraulic rod 3 needs to be continuously retracted so that the polishing belt fits more closely to the outer wall of the drill rod and the rubber protrusions on the two driven rollers are in close contact with the drill rod. The drill rod is rotated by the contact between the rubber protrusions and the drill rod, so that the unpolished area of the drill rod is rotated to the upper part and continues to be polished under the polishing member.

[0021] S4. Drill rod output and inspection: After completing the comprehensive inspection of the drill rod, the polishing parts are moved outside the platform, and the drill rod is taken out and inspected for smoothness. Specifically, the smoothness must be lower than 0.8μm. The inspection equipment for the outer wall of the drill rod includes but is not limited to a laser scanning surface roughness meter. Drill rods that do not meet the standards need to be re-polished, and drill rods that meet the standards are transported to the storage area.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention can position the inner wall of drill rods of different sizes through the support member, which is convenient for positioning drill rods of different specifications, and cooperates with the polishing member for grinding operation, which can effectively improve the grinding efficiency of the drill rod.

[0024] 2. The present invention can adapt to the grinding of drill rods of different diameters by using a grinding belt made of a composite abrasive mixture. After completing a single grinding operation, the drill rod can be rotated with the cooperation of the polishing piece to achieve all-round grinding of the drill rod.

[0025] 3. The present invention can realize the outward expansion of the two sets of folding frames and maintain the tension of the grinding belt under the elastic action of the two hanging springs. After the polishing operation is completed and the contact with the drill rod is released, the tension can still be maintained. The grinding belt can also be quickly replaced under the rotation connection between the two sets of folding frames and the active roller to meet normal polishing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the overall structure of a composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes provided in Example 1 of the present invention;

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the right side view;

[0028] Figure 3 For the present invention Figure 1 Schematic diagram of the top view structure;

[0029] Figure 4 For the present invention Figure 1A schematic diagram of the structure when viewed from above;

[0030] Figure 5 For the present invention Figure 1 A schematic diagram of the structure from an upward perspective;

[0031] Figure 6 It is a structural schematic diagram of the support member of the present invention;

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the local structure explosion;

[0033] Figure 8 Schematic diagram of the structure of the polishing piece of the present invention in two states;

[0034] Figure 9 It is a schematic diagram of the three-dimensional structure of the polishing piece of the present invention in the grinding state.

[0035] Description of main symbols:

[0036] 1. Platform; 2. Base; 3. Slide; 4. Movable plate; 5. Connecting port; 6. Bottom slide; 7. Motor 1; 8. Bidirectional screw; 9. Hydraulic rod 1; 10. Top plate; 11. Bracket 1; 12. Hydraulic rod 2; 13. Sleeve; 14. Round plate; 15. Vertical slot 1; 16. Movable block; 17. Side plate; 18. Oblique slot; 19. Slide rod 1; 20. Side connecting rod; 21. Support plate; 22. Limit slide; 23. Side slide; 24. Hydraulic rod three; 25. Connecting plate; 26. Bracket two; 27. Motor two; 28. Screw; 29. Outer plate; 30. Guide plate; 31. Horizontal slot; 32. Slide bar two; 33. Folding frame; 34. Active roller; 35. Motor three; 36. Slide frame; 37. Connecting block; 38. Bracket three; 39. Vertical slot two; 40. Driven roller; 41. Grinding belt; 42. Rubber protrusion; 43. Hanging rod; 44. Hanging spring. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] Example 1: Please combine Figure 1 The composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes of this embodiment includes a platform 1, a support member and a polishing member.

[0039] Two bases 2 are symmetrically fixedly connected to the bottom end of the platform 1. There are grooves on the outer sides of the two bases 2 connected to the platform 1. Two support members are symmetrically arranged on the upper part of the platform 1. The two support members can slide toward each other on the upper part of the platform 1 and support the inner wall of the drill rod. Polishing parts are slidably connected on both sides of the platform 1 along the extension direction of the platform 1. The polishing parts can fit the outer wall of the drill rod and grind the drill rod as the polishing parts slide horizontally.

[0040] After the polishing part completes grinding the upper outer wall of the drill rod, the polishing part can continue to move vertically downward, and its bottom end can further fit the drill rod, and the drill rod can be driven to flip when the support parts on both sides are loosened, so that the unpolished outer wall of the drill rod is rotated to the upper part, and the polishing part is started again to grind the drill rod.

[0041] The support member includes a displacement unit and a support unit. The displacement unit includes slide bars 3 symmetrically fixedly connected to both sides of the upper end of the platform 1. The slide bars 3 are parallel to the extension direction of the platform 1. Connecting openings 5 are provided on both sides of the two slide bars 3. The top ends of the two slide bars 3 are horizontally slidably connected to movable plates 4. The bottom ends of the two movable plates 4 are fixedly connected to bottom slide plates 6. The bottom slide plates 6 slide horizontally in the connecting openings 5, and the bottom slide plates 6 are located below the platform 1 and have a threaded groove. One side of the platform 1 is fixedly connected to a motor 7, and the output shaft of the motor 7 is fixedly connected to a bidirectional screw rod 8. The two sides of the bidirectional screw rod 8 are respectively threadedly connected to the threaded grooves of the bottom slide plate 6, for synchronously driving the two movable plates 4 to slide toward each other.

[0042] Specifically, pulleys are provided at the connection points between the bottom sides of the movable plate 4 and the top of the platform 1 .

[0043] The tops of the two movable plates 4 are fixedly connected to two hydraulic rods 9, the tops of the two hydraulic rods 9 are fixedly connected to a top plate 10, the top of the top plate 10 is installed with a hydraulic rod 2 12, the hydraulic rod 2 12 is fixedly connected to a bracket 11 outside, and the hydraulic rod 2 12 is fixed by the bracket 11, and the output end of the hydraulic rod 2 12 is facing the inside of the platform 1.

[0044] The expansion unit includes a sleeve 13 coaxially fixedly connected to one side of the hydraulic rod 12, and a circular plate 14 is fixedly connected to the outer side of the sleeve 13. The circular plate 14 is circumferentially provided with several groups of vertical grooves 15, and the number of vertical grooves 15 is at least three groups. A limiting slide 22 is radially slidably connected to the circular plate 14 in each vertical groove 15. Specifically, the limiting slide 22 can only slide horizontally along the vertical groove 15. Each limiting slide 22 is located outside the circular plate 14 and is fixedly connected to a side connecting rod 20. Each side connecting rod 20 is parallel to the end face of the circular plate 14. The outer end of each side connecting rod 20 is fixedly connected to a support plate 21, and a rubber strip is provided at the connection between the outside of the support plate 21 and the inner wall of the drill pipe.

[0045] The output end of the hydraulic rod 2 12 is located outside the circular plate 14 and is fixedly connected to a movable block 16. The outer wall of the movable block 16 is circumferentially fixedly connected to a number of side plates 17. The number of side plates 17 is the same as the number of vertical slots 15. Each side plate 17 is provided with an obliquely inclined inclined notch 18. Each inclined notch 18 is slidably connected to a slide rod 19. Each slide rod 19 is fixedly connected to a side connecting rod 20. When the output end of the hydraulic rod 2 12 is extended or retracted, the multiple support plates 21 are synchronously slid outward / inward under the sliding connection between the inclined notch 18 and the slide rod 19, so as to support the inner wall of the drill pipe and rotate in conjunction with the polishing part when the support is released.

[0046] The implementation principle of the composite abrasive polishing tool for ultra-deep well drill pipe surface treatment in the embodiment of the present application is as follows:

[0047] The drill rod to be polished is transported to the device through the clamping robot arm (including but not limited to the clamping robot arm, or other conveying equipment, as long as the conveying function is realized), and the motor 17 is started to drive the bidirectional screw 8 to rotate. Under the characteristics of the bidirectional screw 8, the bottom slides 6 on both sides can slide inward and retract synchronously, and with the cooperation of the hydraulic rod 19, the telescopic end of the hydraulic rod 2 12 is coaxial with the drill rod. When the movable plate 4 drives the top hydraulic rod 2 12 to move to the two ends of the drill rod, the two hydraulic rods 2 12 are synchronously driven to perform telescopic movements. Since the position of the circular plate 14 remains unchanged relative to the hydraulic rod 2 12, the movable block 16 will synchronously drive the side plate 17 to move outward when the telescopic end of the hydraulic rod 2 12 is extended and retracted outward, and as the side plate 17 moves, multiple support plates 21 can be synchronously driven to slide outward synchronously and press against the inner wall of the drill rod to ensure the stability of the drill rod during subsequent grinding operations.

[0048] After the upper area of the drill rod outer wall is polished, the two support plates 21 can be synchronously controlled to shrink slightly inward, thereby providing space for the rotation of the drill rod, so that the drill rod can rotate synchronously to achieve comprehensive polishing of the drill rod outer wall.

[0049] Example 2: Combination Figure 1 、 Figure 2 、 Figure 5 、 Figure 8 and Figure 9 Based on Example 1, this embodiment has the following further improvements:

[0050] The polishing part includes a bracket 26 fixedly connected to one side of the platform 1, the top of the bracket 26 is fixedly connected to a motor 27, the output shaft of the motor 27 is fixedly connected to a screw 28, the screw 28 is threadedly connected to a connecting plate 25, and the two sides of the connecting plate 25 are symmetrically fixedly connected to hydraulic rods 3 24, the bottom ends of the two hydraulic rods 3 24 are fixedly connected to side slides 23, and the two side slides 23 are symmetrically and horizontally slidably connected to the outer groove of the platform 1.

[0051] The tops of the two hydraulic rods 32 are respectively fixedly connected to the outer plates 29, and the inner sides of the two outer plates 29 are symmetrically fixedly connected to the guide plates 30. Horizontal grooves 31 are symmetrically opened on both sides of the two guide plates 30. The two horizontal grooves 31 are symmetrically and horizontally slidably connected to the slide rods 2 32. The two slide rods 2 32 are located in the middle of the two guide plates 30 and are respectively fixedly connected to two folding frames 33 on both sides. The middle of the top of the two groups of folding frames 33 is rotatably connected to the active roller 34, and the bottom ends of the two groups of folding frames 33 are respectively rotatably connected to the driven roller 40, and the two driven rollers 40 and one active roller 34 are provided with a grinding belt 41 on the outer cover, wherein the active roller 34 and the driven roller 40 are provided with a protrusion, and the connection between the grinding belt 41 and the three is provided with a groove matching the protrusion to increase the transmission friction. The two groups of folding frames 33 Both sides are symmetrically fixedly connected with hanging rods 43, and the two hanging rods 43 on the same side are provided with hanging springs 44 for maintaining the tension of the grinding belt 41. Rubber protrusions 42 are provided on both sides of the outer walls of the two driven rollers 40, which are used to cooperate with the rubber protrusions 42 to bend and abut against the outer wall of the drill pipe when the hydraulic rod three 24 drives the entire outer plate 29 to move downward. A bracket three 38 is fixedly connected to the middle of the outer wall of one of the guide plates 30. The longitudinal section of the bracket three 38 is L-shaped, and a vertical vertical groove two 39 is provided in the middle of the upper section of the bracket three 38. A connecting block 37 is vertically slidably connected in the vertical groove two 39. A sliding frame 36 is fixedly connected to one side of the connecting block 37. The bottom end of the sliding frame 36 is fixedly connected to a motor three 35. The output end of the motor three 35 is coaxially fixedly connected to the active roller 34.

[0052] Specifically, when the grinding belt 41 does not abut against the outer wall of the drill rod, the folding frame 33 can be pushed outward under the elasticity of the two hanging springs 44, and the two driven rollers 40 at the bottom end can pull the grinding belt 41 outward to maintain the tension state. When the grinding belt 41 directly abuts against the outer wall of the drill rod and adheres to the outer wall of the drill rod and is deformed, the two driven rollers 40 will synchronously move toward the bottom end of the drill rod and shrink, so that the grinding belt 41 can better fit the outer wall of the drill rod, and the drill rod can be driven to rotate under the friction between the rubber protrusion 42 and the drill rod, so that the unpolished surface of the drill rod can be adjusted to the upper side (such as Figure 8 As shown on the right side), it can better cooperate with the grinding belt 41 for polishing operation, and after the adjustment is completed, the hydraulic rod 3 24 rises again to restore the grinding belt 41 (as shown on the right side). Figure 8 shown on the left).

[0053] The implementation principle of the composite abrasive polishing tool for ultra-deep well drill pipe surface treatment in the embodiment of the present application is as follows:

[0054] After the drill rod is supported, the motor 27 is started to drive the screw 28 to rotate, and the screw 28 drives the connecting plate 25 and the side slides 23 on both sides to slide along the platform 1. After the side slides 23 slide to the edge of the drill rod, the two hydraulic rods 3 24 are synchronously driven to retract downward, so that the two outer plates 29 drive the guide plate 30 to descend. At this time, the upper part of the drill rod located just above the platform 1 will first contact the bottom of the grinding belt 41. As the hydraulic rod 3 24 continues to descend, the two driven rollers 40 are synchronously driven to retract inward when the grinding belt 41 contacts the upper part of the drill rod (as shown in FIG. Figure 8 The motor 35 is then started to drive the active roller 34. Under the transmission of the active roller 34 and the grinding belt 41, the two driven rollers 40 are synchronously driven to follow, so that the grinding belt 41 grinds the contact area of the drill rod. During the grinding, the motor 27 rotates in an orderly manner, so that the hydraulic rod 3 24 drives the grinding belt 41 to move synchronously, gradually sliding from one end of the drill rod to the other end, and completing the grinding of the upper part of the drill rod.

[0055] At this time, the hydraulic rod three 24 is continuously contracted so that the grinding belt 41 fits more closely to the outer wall of the drill rod, and the rubber protrusions 42 at the two driven rollers 40 fit tightly to the drill rod, while loosening the support for the inner wall of the drill rod. The motor three 35 is driven to rotate the drill rod under the contact between the rubber protrusions 42 and the drill rod, so that the drill rod rotates the unground area to the upper part, and then the hydraulic rod three 24 is driven to rise so that it is in a grinding operation state, and at the same time, the motor two 27 and the motor three 35 are started to perform the grinding operation during the return journey.

[0056] When the grinding operation is completed, the entire side slide plate 23 is moved outside the drill rod by the second motor 27, thereby facilitating the removal of the drill rod.

[0057] Example 3: Combination Figures 1-9 The method of using the composite abrasive polishing tool for ultra-deep well drill pipe surface treatment is as follows:

[0058] S1. Drill rod delivery and positioning: After the drill rod is delivered to the top of the platform 1, the two support members are started to move and the inner walls at both ends of the drill rod are stretched and fixed. Specifically, the motor 17 is started to drive the bidirectional screw 8 to rotate, so that the bottom slide 6 can slide and retract synchronously inward. When the movable plate 4 drives the top hydraulic rod 2 12 to move to the two ends of the drill rod, the two hydraulic rods 2 12 are driven to perform telescopic movements. When the side plates 17 are driven by the movable block 16 to move at the telescopic end of the hydraulic rod 2 12, multiple support plates 21 are synchronously driven to slide outward and press against the inner wall of the drill rod;

[0059] S2. Drill rod polishing: While driving the polishing member to move horizontally, the upper part of the drill rod is polished. Specifically, the second motor 27 is started to drive the screw 28 to drive the entire polishing member to slide along the platform 1. After sliding to the edge of the drill rod, the hydraulic rod 3 24 is driven to retract downward. As the bottom of the polishing belt 41 descends, it will contact the upper part of the drill rod and gradually fit the outer surface of the drill rod. The outer surface of the polishing belt 41 is driven by the third motor 35 to polish the drill rod. During polishing, the second motor 27 will rotate in an orderly manner, causing the entire hydraulic rod 3 24 to slide to the other end of the drill rod, completing the polishing of the contact area on the upper part of the drill rod;

[0060] S3. Rotating and polishing the drill rod: After a single polishing of the drill rod is completed, the drill rod is rotated in cooperation with the polishing member and the support member. The polishing member, during the reciprocating sliding process, finally completes the comprehensive polishing of the drill rod. Specifically, the hydraulic rod 3 24 needs to be continuously retracted so that the polishing belt 41 fits more closely to the outer wall of the drill rod and the rubber protrusions 42 on the two driven rollers 40 fit tightly to the drill rod. The drill rod is rotated by the contact between the rubber protrusions 42 and the drill rod, so that the unpolished area of the drill rod is rotated to the upper part and continues to be polished under the polishing member.

[0061] S4. Drill rod output and inspection: After the comprehensive inspection of the drill rod is completed, the polishing part is moved outside the platform 1, and the drill rod is taken out and inspected for smoothness. Specifically, the smoothness must be lower than 0.8μm. The inspection equipment for the outer wall of the drill rod includes but is not limited to a laser scanning surface roughness meter. Drill rods that do not meet the standards need to be re-polished, and drill rods that meet the standards are transported to the storage area.

[0062] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A composite abrasive polishing tool for ultra-deep well drill pipe surface treatment, characterized in that: include: A platform (1), wherein the bottom end of the platform (1) is symmetrically fixedly connected to two bases (2), and grooves are formed at the connection points between the outer sides of the two bases (2) and the platform (1). Two supporting members are symmetrically provided on the upper part of the platform (1), and the two supporting members can slide toward each other on the upper part of the platform (1) and support the inner wall of the drill rod. Polishing members are slidably connected to both sides of the platform (1) along the extension direction of the platform (1), and the polishing members can fit the outer wall of the drill rod and grind the drill rod as the polishing members slide horizontally; After the polishing part completes the grinding of the upper outer wall of the drill rod, the polishing part can continue to move vertically downward, and its bottom end can further fit the drill rod, and the drill rod can be driven to flip under the loosening of the support parts on both sides, so that the unpolished outer wall of the drill rod is rotated to the upper part, and the polishing part is started again to grind the drill rod; The polishing part includes a bracket 2 (26) fixedly connected to one side of the platform (1), the top of the bracket 2 (26) is fixedly connected to the motor 2 (27), the output shaft of the motor 2 (27) is fixedly connected to the screw (28), the screw (28) is threadedly connected to the connecting plate (25), the two sides of the connecting plate (25) are symmetrically fixedly connected to the hydraulic rod 3 (24), the bottom ends of the two hydraulic rods 3 (24) are fixedly connected to the side slides (23), the two side slides (23) are symmetrically horizontally slidably connected to the outer groove of the platform (1), the tops of the two hydraulic rods 3 (24) are respectively fixedly connected to the outer plate (29), the inner sides of the two outer plates (29) are symmetrically fixedly connected to the guide plate (30), the two guide plates (30) are symmetrically provided with horizontal grooves (31) on both sides, and the two horizontal grooves (31) are symmetrically connected to the sliding plate (23) in the horizontal direction. Rod two (32), two sliding rods two (32) are located at the middle of the two guide plates (30) and are fixedly connected to two folding frames (33) on both sides. The middle of the top of the two groups of folding frames (33) is rotatably connected to the active roller (34), and the bottom of the two groups of folding frames (33) is rotatably connected to the driven roller (40), and the two driven rollers (40) and the one active roller (34) are provided with a grinding belt (41) on the outer sleeve. Both sides of the two groups of folding frames (33) are symmetrically fixedly connected to the hanging rod (43), and the two hanging rods (43) on the same side are provided with a hanging spring (44) for maintaining the tension state of the grinding belt (41). Rubber protrusions (42) are provided on both sides of the outer wall of the two driven rollers (40), which are used to cooperate with the rubber protrusions (42) to bend and abut against the outer wall of the drill rod when the hydraulic rod three (24) drives the entire outer plate (29) to move downward.

2. The composite abrasive polishing tool for ultra-deep well drill pipe surface treatment according to claim 1, characterized in that: The support member includes a displacement unit and a support unit. The displacement unit includes slide bars (3) symmetrically fixedly connected to both sides of the upper end of the platform (1). The slide bars (3) are parallel to the extension direction of the platform (1). A connecting port (5) is provided on both sides of the two slide bars (3). The top ends of the two slide bars (3) are horizontally slidably connected to a movable plate (4). The bottom ends of the two movable plates (4) are fixedly connected to a bottom slide plate (6). The bottom slide plate (6) slides horizontally in the connecting port (5). The bottom slide plate (6) is provided with a threaded notch below the platform (1). One side of the platform (1) is fixedly connected to a motor 1 (7). The output shaft of the motor 1 (7) is fixedly connected to a bidirectional screw rod (8). The two sides of the bidirectional screw rod (8) are respectively threadedly connected to the threaded notches of the bottom slide plate (6) for synchronously driving the two movable plates (4) to slide toward each other.

3. The composite abrasive polishing tool for ultra-deep well drill pipe surface treatment according to claim 2, characterized in that: The top ends of the two movable plates (4) are fixedly connected to two hydraulic rods (9), the top ends of the two hydraulic rods (9) are fixedly connected to a top plate (10), the top end of the top plate (10) is installed with a hydraulic rod (12), the outside of the hydraulic rod (12) is fixedly connected to a bracket (11), and the hydraulic rod (12) is fixed by the bracket (11), and the output end of the hydraulic rod (12) faces the inside of the platform (1).

4. The composite abrasive polishing tool for ultra-deep well drill pipe surface treatment according to claim 3, characterized in that: The expansion unit comprises a sleeve (13) coaxially fixedly connected to one side of the hydraulic rod (12), a circular plate (14) being fixedly connected to the outer side of the sleeve (13), a plurality of groups of vertical grooves (15) being circumferentially opened on the circular plate (14), the number of the vertical grooves (15) being at least three groups, a limiting slide (22) being radially slidably connected to the circular plate (14) in each vertical groove (15), each limiting slide (22) being fixedly connected to a side connecting rod (20) outside the circular plate (14), each side connecting rod (20) being parallel to the end face of the circular plate (14), and the outer end of each side connecting rod (20) being fixedly connected to a support plate (21).

5. The composite abrasive polishing tool for ultra-deep well drill pipe surface treatment according to claim 4, characterized in that: The output end of the hydraulic rod 2 (12) is located outside the circular plate (14) and is fixedly connected to a movable block (16). The outer wall of the movable block (16) is circumferentially fixedly connected to a plurality of side plates (17). The number of the side plates (17) is the same as that of the vertical slot 1 (15). Each side plate (17) is provided with an obliquely inclined inclined slot (18). Each inclined slot (18) is slidably connected to a slide rod 1 (19). Each slide rod 1 (19) is fixedly connected to a side connecting rod (20). When the output end of the hydraulic rod 2 (12) is extended or retracted, the plurality of support plates (21) are synchronously slid outward / inward under the sliding connection between the inclined slot (18) and the slide rod 1 (19).

6. The composite abrasive polishing tool for ultra-deep well drill pipe surface treatment according to claim 1, characterized in that: A bracket three (38) is fixedly connected to the middle of the outer wall of one of the guide plates (30), the longitudinal section of the bracket three (38) is L-shaped, a vertical vertical groove two (39) is opened in the middle of the upper section of the bracket three (38), a connecting block (37) is vertically slidably connected in the vertical groove two (39), one side of the connecting block (37) is fixedly connected to the sliding frame (36), the bottom end of the sliding frame (36) is fixedly connected to the motor three (35), and the output end of the motor three (35) is coaxially fixedly connected to the active roller (34).

7. A method for using a composite abrasive polishing tool for surface treatment of ultra-deep well drill pipes, characterized in that: The composite abrasive polishing tool for ultra-deep well drill pipe surface treatment according to any one of claims 1 to 6 is used as follows: S1. Drill rod delivery and positioning: After delivering the drill rod to the top of the platform (1), the two supporting members are activated to move and the inner walls of both ends of the drill rod are opened and fixed; S2. Drill rod polishing: while driving the polishing part to move horizontally, it also polishes the upper part of the drill rod; S3. Rotate and polish the drill rod: After the polishing of a single drill rod is completed, the drill rod is rotated in cooperation with the polishing member and the support member, and the polishing member in reciprocating sliding completes the comprehensive polishing of the drill rod; S4. Drill rod output and inspection: After the comprehensive inspection of the drill rod is completed, the polishing piece is moved outside the platform (1), and the drill rod is taken out and inspected for smoothness.

Images