Polishing device for petroleum drill rod

Abstract

The utility model relates to the technical field of grinding surfaces for cleaning, in particular to a petroleum drill rod grinding device which comprises a rack, a grinding mechanism and a driving device are arranged on the rack, the driving device is in transmission connection with a rotating seat, an outer clamping structure is arranged on the rotating seat, and the outer clamping structure is connected with the grinding mechanism. The outer clamping structure comprises a clamping body used for clamping the outer circumferential face of the end of the petroleum drill rod, an inner inserting column corresponding to the clamping body in position is further arranged on the rotating base, the inner inserting column is used for being inserted into an inner hole of the petroleum drill rod in a matched mode so as to support the petroleum drill rod when the clamping body clamps the petroleum drill rod, and the phenomenon that the end of the petroleum drill rod deforms due to too large clamping force is avoided. Influence on use of the drill rod is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding surfaces for cleaning purposes, in particular to a petroleum drill pipe grinding device. Background Art

[0002] In the process of oil extraction, oil drill pipes are used. Oil drill pipes are made of steel pipes with inner holes, which are used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. The purpose of oil drill pipes is to transport drilling mud to the drill bit for subsequent drilling. The production and processing of oil drill pipes requires grinding of their outer surface to make the outer surface of the oil drill pipes rust-free and smooth, which requires the use of oil drill pipe grinding devices.

[0003] A Chinese utility model patent with authorization announcement number CN216327427U and authorization announcement date April 19, 2022 discloses a cleaning device for an oil drill pipe, which constitutes an oil drill pipe grinding device, including a frame, a bracket one and a support block respectively arranged at both ends of the frame, the bottom of the bracket one is fixed to the frame, and the bracket one is provided with a placement block for placing one end of the oil drill pipe; a fixed frame is fixed on one side of the support block away from the bracket one, a clamping block is provided above the support block, a push rod of a cylinder is fixed on one side of the clamping block, and the cylinder is installed on the fixed frame, and the fixed frame one away from the support block A rotating shaft is provided on the side, and a bracket 2 is fixedly provided on the side of the fixed frame away from the support block. The rotating shaft passes through the bracket 2 and is connected to a motor. The cylinder pushes the clamping block so that the other end of the oil drill pipe is clamped and fixed by the clamping block and the support block. The fixed frame constitutes a rotating seat. The cylinder, the clamping block and the support block together constitute an external clamping structure. The clamping block and the support block constitute two clamping bodies arranged opposite to each other. The motor constitutes a driving device. The motor drives the rotating shaft to rotate and drives the entire fixed frame to rotate, thereby realizing the function of rotating the oil drill pipe. While the oil drill pipe rotates, the cleaning frame drives the grinding disc to grind the outer wall of the oil drill pipe back and forth.

[0004] When the above-mentioned oil drill pipe grinding device is in use, in order to ensure that the clamping bodies on both sides can drive the drill pipe to rotate, it is often necessary to clamp it very tightly and with a large clamping force, which can easily cause deformation of the drill pipe end and affect the subsequent connection between drill pipes. Utility Model Content

[0005] The utility model aims to provide a petroleum drill pipe grinding device to solve the problem that the existing petroleum drill pipe grinding device easily deforms the end of the drill pipe.

[0006] The technical solution of the oil drill pipe grinding device of the utility model is:

[0007] A petroleum drill pipe grinding device comprises a frame, on which a grinding mechanism and a driving device are arranged, the driving device is transmission-connected to a rotating seat, on which an external clamping structure is arranged, the external clamping structure comprises a clamping body for clamping the outer peripheral surface of the end of the petroleum drill pipe, and the rotating seat is also provided with an inner insertion column corresponding to the position of the clamping body, the inner insertion column is used to fit and be inserted into the inner hole of the petroleum drill pipe to support the petroleum drill pipe when the clamping body clamps the petroleum drill pipe.

[0008] Beneficial effect: The utility model is improved on the basis of the clamping structure of the oil drill pipe grinding device in the prior art. An inner insert column is arranged on the rotating seat, and the inner insert column is inserted into the inner hole of the oil drill pipe. Therefore, when the clamping body of the external clamping structure is clamped on the outer peripheral surface of the end of the oil drill pipe, the inner insert column can support the part of the clamping body clamping the drill pipe inside the oil drill pipe, thereby avoiding deformation of the end of the oil drill pipe due to excessive clamping force, and avoiding affecting the use of the drill pipe.

[0009] Furthermore, the outer clamping structure includes a screw-nut mechanism, which includes a screw rotatably mounted on a rotating seat and a nut threadedly connected to the screw. The clamping body is fixed on the nut, and the nut is provided with a guide limit structure that cooperates with the rotating seat to stop rotation.

[0010] Beneficial effects: the clamping body is driven by the screw nut mechanism, the structure is simple, the cost is low, and the use is reliable.

[0011] Furthermore, the guide and limiting structure includes a guide rod, and the rotating seat is provided with a guide groove which is matched with the guide rod in the extending direction of the screw rod.

[0012] Beneficial effects: the guide rod and the guide groove cooperate to stop the nut from rotating, so that the nut drives the clamping body to move linearly; and it is convenient to make the rotating seat and install the screw nut mechanism.

[0013] Furthermore, the guide limiting structure includes a connecting block connected to the nut, the guide rod is movably arranged on the connecting block along a direction perpendicular to the extension direction of the screw rod, and an elastic retaining structure for pressing the guide rod into the guide groove is provided between the connecting block and the guide rod.

[0014] Beneficial effect: the guide rod can be extended and retracted relative to the connecting block, and the guide rod is not easy to get stuck when moving in the guide groove.

[0015] Furthermore, the guide rod has a ball head extending into the guide groove.

[0016] Beneficial effect: The use of the ball head can reduce the friction between the guide rod and the guide groove, which is conducive to reliable use.

[0017] Furthermore, two clamping bodies are arranged opposite to each other, the screw rod is a bidirectional screw rod, and nuts are respectively threadedly connected on two threaded sections with opposite rotation directions of the bidirectional screw rod, and the two nuts respectively drive the corresponding clamping bodies to move.

[0018] Beneficial effect: The two clamping bodies are driven by the cooperation of the bidirectional screw rod and the two nuts to clamp the oil drill pipe, which is reliable and easy to operate.

[0019] Furthermore, the inner insertion column is arranged at the center of the rotating seat, and the two nuts are respectively located on two radial sides of the inner insertion column.

[0020] Beneficial effects: It is convenient to arrange the inner insertion column and the outer clamping structure on the rotating seat, and the force is reliable.

[0021] Furthermore, mounting grooves are respectively provided on the rotating seat on both radial sides of the inner insert column, the bidirectional screw rod passes through the mounting groove in a direction perpendicular to the axial direction of the inner insert column, the nut is located in the corresponding mounting groove, and the bidirectional screw rod is rotatably supported on the groove side walls opposite to each other.

[0022] Beneficial effect: The bidirectional screw rod is supported by the opposite groove side walls of the two installation grooves, which is conducive to the stable installation and reliable use of the bidirectional screw rod.

[0023] Furthermore, the clamping body of the outer clamping structure is used to clamp one end of the oil drill pipe to cooperate with the inner insert column to support the oil drill pipe on the clamping body.

[0024] Beneficial effect: It is convenient to grind the drill rod in cooperation with the grinding mechanism, and a relatively large grinding area can be provided, which is beneficial to improving the grinding efficiency.

[0025] Furthermore, the grinding mechanism includes a grinding head and a cylinder for driving the grinding head to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of Embodiment 1 of the oil drill pipe grinding device of the utility model;

[0027] Figure 2 for Figure 1 A cross-sectional schematic diagram of a petroleum drill pipe grinding device;

[0028] Figure 3 for Figure 2 Partial view at point A in the figure;

[0029] Figure 4 for Figure 2 Partial view at point B in the figure.

[0030] In the figure: 1. frame; 2. motor; 3. cylinder; 4. grinding disc; 51. rotating seat; 52. internal insertion column; 53. oil drill pipe; 54. connecting block; 55. clamping plate; 56. bidirectional screw rod; 57. guide rod; 58. sliding ball; 59. end plate; 591. elastic air bag; 592. slide groove; 593. nut; 61. fixing plate; 62. oil storage cylinder; 63. liquid outlet pipe; 64. oil absorbing cotton ball; 65. piston disc; 66. connecting rod; 67. end block; 68. spring; 69. magnetic plate; 691. electromagnet. DETAILED DESCRIPTION

[0031] Embodiment 1 of the oil drill pipe grinding device of the utility model:

[0032] In this embodiment, an inner insert column is arranged on the rotating seat and inserted into the inner hole of the oil drill pipe. Therefore, when the clamping body of the external clamping structure is clamped on the outer peripheral surface of the end of the oil drill pipe, the inner insert column can support the part of the clamping body clamping the drill pipe inside the oil drill pipe, thereby avoiding deformation of the end of the oil drill pipe due to excessive clamping force and affecting the use of the drill pipe.

[0033] like Figure 1-4 As shown, the oil drill pipe grinding device includes a frame 1, the frame 1 includes a base and a gantry, the gantry includes left and right side columns and an upper crossbeam, a motor 2 is fixed on the right side surface of the right side column of the gantry, the output shaft of the motor 2 passes through the right side column, and the output shaft passes through the left side of the right side column and is connected to a clamping mechanism, the clamping mechanism is used to clamp and fix the oil drill pipe 53, so as to drive the oil drill pipe 53 to rotate through the motor 2. A grinding mechanism is also fixedly installed on the upper crossbeam of the gantry of the frame 1, the grinding mechanism includes a cylinder 3 and a grinding sheet 4, the grinding sheet 4 is a grinding head, and the grinding sheet 4 is used to grind the outer peripheral surface of the oil drill pipe 53.

[0034] The clamping mechanism includes a rotating seat 51, an inner insert column 52, a connecting block 54, a clamping plate 55, a bidirectional screw 56, a push rod 57, a sliding ball 58, an end plate 59 and an elastic airbag 591. The rotating seat 51 is fixedly connected to the output end of the output shaft of the motor 2, and the motor 2 constitutes a driving device for driving the rotating seat to rotate. The rotating seat 51 is disc-shaped, and the inner insert column 52 is fixedly connected to the center of the rotating seat 51. The axis of the inner insert column 52 extends in the left and right directions. The right end face of the inner insert column 52 is fixed to the left disc face of the rotating seat 51. The outer diameter of the inner insert column 52 is adapted to the aperture of the inner hole of the oil drill pipe 53. The inner insert column is used to be inserted into the drill pipe, and the right end of the drill pipe is in contact with the rotating seat 51.

[0035] The rotating seat 51 is provided with mounting grooves on the upper and lower sides of the inner insertion column 52, and the bidirectional screw rod 56 passes through the mounting groove in a direction perpendicular to the axial direction of the inner insertion column. The axis of the bidirectional screw rod 56 extends in the up-down direction. The two thread sections of the bidirectional screw rod 56 with opposite screw directions are respectively located in the two mounting grooves. The bidirectional screw rod 56 is supported by bearings on the groove side walls opposite to each other in the two mounting grooves. The bidirectional screw rod 56 has a part extending out of the mounting groove for easy screwing operation. The part of the bidirectional screw rod 56 located in the mounting groove is threadedly connected with a nut 593, and the nut 593 is located in the corresponding mounting groove. The connecting block 54 and the clamping plate 55 are fixed with the nut 593, and the clamping plate 55 is used to clamp the oil drill pipe 53. The connecting block 54 is provided with a through hole, and the top rod 57 is movably arranged in the through hole in the left-right direction. The sliding ball 58 is fixed to the right end of the top rod 57. The bottom of the mounting groove is provided with a sliding groove 592 adapted to the sliding ball 58, and the sliding groove 592 extends in the up-down direction. The end plate 59 is sleeved on the push rod 57, and an elastic airbag 591 is provided between the end plate 59 and the connecting block 54. The bidirectional screw rod 56, the nut, the connecting block 54, and the push rod 57 are used to form a screw rod and nut mechanism, and the screw rod and nut mechanism and the clamping plate 55 together constitute an external clamping structure. The push rod 57 and the sliding ball 58 together constitute a guide rod, and the sliding groove 592 constitutes a guide groove. The guide rod and the guide groove are guided and matched to play a role in stopping the nut from rotating, so that the nut 593 drives the clamping plate 55 to move directly and clamp the oil drill pipe 53.

[0036] The sliding ball 58 constitutes the ball head of the guide rod extending into the guide groove, which can reduce the friction between the guide rod and the guide groove. The elastic air bag 591 constitutes the elastic retaining structure between the connecting block and the guide rod for pressing the guide rod in the guide groove, so that the guide rod is not easy to get stuck when moving in the guide groove.

[0037] The rotating seat is provided with an inner insert column and an outer clamping structure. The inner insert column is used to fit into the inner hole of the oil drill pipe 53. The outer clamping structure includes a clamping body for clamping the outer peripheral surface of one end of the oil drill pipe 53 to cooperate with the inner insert column to suspend and support the oil drill pipe 53 on the clamping body. The clamping plate 55 is an arc-shaped plate with an arc-shaped clamping surface adapted to the outer peripheral surface of the oil drill pipe 53. The clamping plate 55 constitutes a clamping body. The upper and lower clamping plates 55 are arranged opposite to each other. The two-way screw 56 cooperates with two nuts to drive the corresponding clamping plates 55 to move respectively to clamp and loosen the oil drill pipe 53. The upper and lower clamping plates 55 are clamped at one end of the oil drill pipe 53, and the inner insert column 52 enters the inner hole of one end of the oil drill pipe 53. The inner insert column 52 cooperates with the clamping plate 55 inside and outside to ensure the stability of the oil drill pipe 53, so that the other end of the oil drill pipe 53 can be suspended and set, which is convenient for grinding. Since two adjacent oil drill pipes 53 are usually connected by internal and external threads, the clamping plate 55 can be clamped on the end of the oil drill pipe 53 with external threads, so that the grinding of the entire outer peripheral surface can be completed by clamping once.

[0038] When in use, the drill rod is sleeved on the inner insertion column 52, and the bidirectional screw 56 is pushed to rotate, driving the two clamping plates 55 to move toward each other, so that the clamping plates 55 contact the drill rod and clamp the drill rod. In this process, the elastic airbag 591 is deformed to push the end plate 59 to make the push rod 57 move stably, so that the push rod 57 always drives the sliding ball 58 to slide along the inner wall of the slide groove 592 of the rotating seat 51. The starting cylinder 3 pushes the grinding plate 4 to move downward, and the grinding plate 4 contacts the drill rod. The starting motor 2 drives the rotating seat 51 to rotate, and then drives the drill rod to rotate. Under the action of the grinding plate 4, the grinding process of the drill rod is completed.

[0039] Embodiment 2 of the oil drill pipe grinding device in the utility model:

[0040] This embodiment provides a different external clamping structure arrangement from that of the first embodiment. The difference between this embodiment and the first embodiment is that the external clamping structure in the first embodiment includes a screw-nut mechanism, the screw-nut mechanism includes a screw rotatably mounted on a rotating seat and a nut threadedly connected to the screw, and the clamping body is fixed on the nut. In this embodiment, the external clamping structure includes a clamping drive cylinder, which drives the clamping body to clamp the oil drill pipe.

[0041] Embodiment 3 of the oil drill pipe grinding device in the utility model:

[0042] This embodiment provides a different guide limit structure setting form from that of embodiment 1. The difference between this embodiment and embodiment 1 is that the guide limit structure in embodiment 1 includes a guide rod, and a guide groove is provided on the rotating seat to guide and cooperate with the guide rod in the extension direction of the screw rod. In this embodiment, the outer peripheral surface of the nut is a rotation-stopping surface, which is rotation-stoppingly matched with the groove wall surface of the installation groove, and the rotation-stopping surface constitutes the guide limit structure.

[0043] Embodiment 4 of the oil drill pipe grinding device in the utility model:

[0044] This embodiment provides a different guide limit structure setting form from that of embodiment 1. The difference between this embodiment and embodiment 1 is that the guide limit structure in embodiment 1 includes a connecting block connected to the nut, the guide rod is movably arranged on the connecting block along a direction perpendicular to the extension direction of the screw rod, and an elastic retaining structure for pressing the guide rod into the guide groove is provided between the connecting block and the guide rod. In this embodiment, the guide limit structure includes a guide rod, which is fixed to the nut.

[0045] Embodiment 5 of the oil drill pipe grinding device in the utility model:

[0046] This embodiment provides a guide rod arrangement different from that of embodiment 1, and the difference between this embodiment and embodiment 1 is that the guide rod in embodiment 1 has a ball head extending into the guide groove. In this embodiment, the guide rod is not provided with a ball head, and the end of the guide rod contacts the groove wall of the guide groove.

[0047] Embodiment 6 of the oil drill pipe grinding device in the utility model:

[0048] This embodiment provides a different external clamping structure setting form from that of the first embodiment. The difference between this embodiment and the first embodiment is that the screw in the first embodiment is a bidirectional screw, and nuts are respectively threadedly connected to two threaded sections of the bidirectional screw in opposite directions, and the two nuts respectively drive the corresponding clamping bodies to move. In this embodiment, two screws are provided, and the two nuts are respectively threadedly connected to the two screws, and the two clamping bodies respectively have a corresponding set of screw nut mechanisms.

[0049] Embodiment 7 of the oil drill pipe grinding device in the utility model:

[0050] This embodiment provides a different external clamping structure arrangement from that of the first embodiment. The difference between this embodiment and the first embodiment is that the inner insertion column in the first embodiment is arranged at the center of the rotating seat, and the two nuts are respectively located on the radial sides of the inner insertion column. In this embodiment, the bidirectional screw is located on one radial side of the inner insertion column, and the two nuts are located on the same side of the inner insertion column.

[0051] Embodiment 8 of the oil drill pipe grinding device in the utility model:

[0052] This embodiment provides a different form of rotating seat arrangement from that of embodiment 1. The difference between this embodiment and embodiment 1 is that in embodiment 1, mounting grooves are provided on the rotating seat on both radial sides of the inner insertion column, the bidirectional screw passes through the mounting grooves in a direction perpendicular to the axial direction of the inner insertion column, the nut is located in the corresponding mounting groove, and the bidirectional screw is rotatably supported on the groove side walls opposite to the two mounting grooves. In this embodiment, however, no mounting groove is provided on the rotating seat, a rotating mounting column is convexly provided on the rotating seat, the inner insertion column is fixedly connected to the rotating mounting column, and the bidirectional screw is rotatably mounted on the rotating mounting column.

[0053] Embodiment 9 of the oil drill pipe grinding device in the utility model:

[0054] This embodiment provides a different clamping body arrangement form from that of the first embodiment. The difference between this embodiment and the first embodiment is that the clamping body in the first embodiment has an arc-shaped clamping surface adapted to the outer peripheral surface of the oil drill pipe. In this embodiment, the clamping surface of the clamping body is a plane.

[0055] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A grinding device for oil drill pipes, comprising a frame, a grinding mechanism and a driving device are arranged on the frame, the driving device is connected to a rotating seat in a transmission manner, an external clamping structure is arranged on the rotating seat, and the external clamping structure comprises a clamping body for clamping the outer peripheral surface of the end of the oil drill pipe, wherein: The rotating seat is also provided with an inner insertion column corresponding to the position of the clamping body, and the inner insertion column is used to be adapted to be inserted into the inner hole of the oil drill pipe to support the oil drill pipe when the clamping body clamps the oil drill pipe.

2. The oil drill pipe grinding device according to claim 1 is characterized in that: The outer clamping structure comprises a screw nut mechanism, which comprises a screw rotatably mounted on a rotating seat and a nut threadedly connected to the screw. The clamping body is fixed on the nut, and a guide limiting structure cooperating with the rotating seat is provided on the nut.

3. The oil drill pipe grinding device according to claim 2 is characterized in that: The guide and limit structure comprises a guide rod, and a guide groove is provided on the rotating seat for guiding and cooperating with the guide rod in the extending direction of the screw rod.

4. The oil drill pipe grinding device according to claim 3 is characterized in that: The guide limit structure comprises a connection block connected to the nut, a guide rod is movably arranged on the connection block along a direction perpendicular to the extension direction of the screw rod, and an elastic retaining structure for pressing the guide rod into the guide groove is arranged between the connection block and the guide rod.

5. The oil drill pipe grinding device according to claim 3 or 4, characterized in that: The guide rod has a ball head extending into the guide groove.

6. The oil drill pipe grinding device according to claim 2, 3 or 4, characterized in that: Two clamping bodies are arranged opposite to each other, and the screw rod is a bidirectional screw rod. Two threaded sections of the bidirectional screw rod with opposite rotation directions are respectively threadedly connected with nuts, and the two nuts respectively drive the corresponding clamping bodies to move.

7. The oil drill pipe grinding device according to claim 6 is characterized in that: The inner insert column is arranged at the center of the rotating seat, and the two nuts are respectively located at two radial sides of the inner insert column.

8. The oil drill pipe grinding device according to claim 7, characterized in that: The rotating seat is provided with mounting grooves on both radial sides of the inner insert column. The bidirectional screw passes through the mounting grooves in a direction perpendicular to the axial direction of the inner insert column. The nut is located in the corresponding mounting groove. The bidirectional screw is rotatably supported on the groove side walls opposite to each other.

9. The oil drill pipe grinding device according to claim 1, 2, 3 or 4, characterized in that: The clamping body of the outer clamping structure is used for clamping one end of the oil drill pipe to cooperate with the inner insert column to suspend and support the oil drill pipe on the clamping body.

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