Laser repairing device for petroleum drill rod

Abstract

The utility model relates to a laser repairing device for a petroleum drill pipe, which comprises an annular bottom plate, a rotary driving mechanism, a righting mechanism and a laser cladding head, and is technically characterized in that the rotary driving mechanism comprises a supporting wheel group, an annular seat plate and a positioning sleeve, and a plurality of positioning screws are uniformly arranged on the peripheral surface of the positioning sleeve; a concentric wheel belt groove is formed in the lower surface of the annular base plate, the top face of each supporting wheel of the supporting wheel set is tightly connected with the groove bottom of the concentric wheel belt groove, a wheel shaft of one supporting wheel is connected with the output end of the driving motor, the righting mechanism comprises a lower supporting sleeve fixed to the inner edge of the annular base plate, and an annular lower supporting plate is arranged at the lower end of the lower supporting sleeve. A plurality of centralizing wheel assemblies are evenly arranged on the annular lower supporting plate, and an annular air bag is fixed between each centralizing wheel assembly and the inner wall of the lower supporting sleeve. The device is suitable for repairing the local damaged position of the drill rod on an oil exploitation site, operation is flexible, and the repairing efficiency is remarkably improved under the condition that the repairing quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drill pipes, in particular to a laser repair device for oil drill pipes. Background Art

[0002] Due to the harsh underground drilling environment, oil drill pipes are subjected to tremendous pressure and friction during the oil extraction process. After long-term use, the wear-resistant section of the drill pipe's outer wall often wears out, seriously affecting its performance.

[0003] CN 221166753 U discloses a wear-resistant strip cladding device for oil drill pipes. The device comprises a supporting base plate, support arms, an assembly top plate, a guide plate, a rotating assembly, a positioning mechanism, and a welding assembly. The bottom of the assembly top plate is fixedly connected to the tops of multiple support arms. The guide plate and the rotating assembly are respectively fixedly connected to the supporting base plate. One end of the guide plate is connected to one end of the rotating assembly. A sliding sleeve is slidably engaged with the guide plate. One end of the connecting arm is fixedly connected to the sliding sleeve and the other end is rotatably connected to a stop rod. The stop rods are mounted in a circular array on the outer wall of the stop rod, and the welding assembly is mounted on the bottom of the assembly top plate. This device is intended to effectively position and secure oil drill pipes of varying sizes through these structural features, reducing operational difficulty and time. It also allows for convenient rotation of positioned oil drill pipes to enhance comprehensive coverage during the cladding process. However, the device presents a problem: it is not suitable for flexible repair of partially damaged drill pipes at oil production sites. Utility Model Content

[0004] The purpose of the utility model is to provide a laser repair device for oil drill pipes with a reasonable structure and reliable use to solve the above problems. The device is suitable for repairing locally damaged parts of drill pipes at oil production sites, has flexible operation, and significantly improves the repair efficiency while ensuring the repair quality.

[0005] The technical solution of the utility model is:

[0006] A laser repair device for oil drill pipes, comprising an annular base plate, a rotary drive mechanism, a straightening mechanism and a laser cladding head, the technical key points of which are as follows: the rotary drive mechanism comprises a support wheel group evenly arranged around the center line of the annular base plate, an annular seat plate arranged above the support wheel group, and a positioning sleeve arranged at the center of the upper surface of the annular seat plate, the lower end of the positioning sleeve is provided with a flange plate, and the flange plate and the annular seat plate are connected and fixed by a bolt pair, a plurality of positioning screws are evenly arranged on the outer circumference of the positioning sleeve, the lower surface of the annular seat plate is provided with concentric wheel grooves, and each of the support wheel groups is provided with a plurality of positioning screws. The axles of the support wheels are parallel to the horizontal plane and the top surfaces thereof are tightly connected with the bottom of the concentric wheel grooves. The axles of one of the support wheels are connected to the output end of the drive motor. The straightening mechanism includes a lower support sleeve fixed to the inner edge of the annular bottom plate, and an annular lower support plate is provided at the lower end of the lower support sleeve. A plurality of straightening wheel assemblies are evenly arranged on the annular lower support plate, and an annular airbag is fixed between each straightening wheel assembly and the inner wall of the lower support sleeve. A stand is provided on the side of the rotary drive mechanism, and the laser cladding head is fixed to the cantilever end of the stand and faces above the positioning sleeve.

[0007] In the above-mentioned oil drill pipe laser repair device, the axle of the straightening wheel of the straightening wheel assembly is perpendicular to the horizontal plane.

[0008] In the above-mentioned oil drill pipe laser repair device, the upper surface of the annular airbag is provided with a compressed gas injection port.

[0009] The above-mentioned oil drill pipe laser repair device, the annular seat plate is composed of two symmetrical seat plates, and a U-shaped clamping piece is provided at the edge of the joint of the two seat plates. The U-shaped clamping piece is connected and fixed to the two seat plates by a pair of bolts.

[0010] In the above-mentioned oil drill pipe laser repair device, the positioning sleeve is composed of two symmetrical sleeves.

[0011] In the above-mentioned oil drill pipe laser repair device, the stand is a lifting stand.

[0012] The beneficial effects of the utility model are:

[0013] 1. When the drill pipe surface is severely damaged at the oil production site, the drill pipe is hoisted into the wellhead using the on-site hoist so that the damaged area is exposed above the positioning sleeve. The positioning screws on the positioning sleeve are then used to vertically position the drill pipe. The hoist is then disconnected and the drive motor is started to rotate the support wheel, thereby driving the annular seat plate, positioning sleeve, and drill pipe to rotate synchronously. During this process, the laser cladding head is used for laser repair, achieving uniform circumferential repair of the damaged area, improving repair efficiency while ensuring the repair effect. This is suitable for repairing locally damaged areas of the drill pipe at the oil production site and is flexible to operate.

[0014] 2. Use the straightening mechanism to keep the center line of the drill pipe perpendicular to the horizontal plane at all times to ensure the repair accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 yes Figure 1 Top view of the middle annular seat plate.

[0017] In the figure: 1. Drive motor, 2. Annular seat plate, 3. Support wheel assembly, 4. Flange, 5. Positioning sleeve, 6. Drill rod, 7. Laser cladding head, 8. Stand, 9. Annular base plate, 10. Concentric wheel with groove, 11. Lower support sleeve, 12. Annular airbag, 13. Righting wheel assembly, 14. Annular lower support plate, 15. Positioning screw, 16. Cantilever end, 17. U-shaped clamp. DETAILED DESCRIPTION

[0018] The utility model is described in detail according to the accompanying drawings.

[0019] like Figure 1 、 Figure 2 As shown, the oil drill pipe laser repair device includes an annular base plate 9, a rotation drive mechanism, a straightening mechanism and a laser cladding head 7.

[0020] The rotary drive mechanism includes a support wheel group 3 evenly arranged around the center line of the annular base plate 9, an annular seat plate 2 arranged above the support wheel group 3, and a positioning sleeve 5 arranged at the center of the upper surface of the annular seat plate 2. The lower end of the positioning sleeve 5 is provided with a flange 4, and the flange 4 is connected and fixed to the annular seat plate 2 by a bolt pair. A plurality of positioning screws 15 are evenly arranged on the outer circumference of the positioning sleeve 5. The lower surface of the annular seat plate 2 is provided with a concentric wheel groove 10. The wheel axles of each support wheel of the support wheel group 3 are parallel to the horizontal plane and their top surfaces are tightly connected to the bottom of the concentric wheel groove 10. The wheel axle of one of the support wheels is connected to the output end of the drive motor 1. In this embodiment, the annular seat plate 2 is composed of two symmetrical seat plates. A U-shaped clamp 17 is provided at the edge of the joint between the two seat plates. The U-shaped clamp 17 is connected and fixed to the two seat plates by a bolt pair. The positioning sleeve 5 is composed of two symmetrical sleeves, which are easy to assemble.

[0021] The straightening mechanism includes a lower support sleeve 11 fixed to the inner edge of the annular base plate 9. An annular lower support plate 14 is provided at the lower end of the lower support sleeve 11. Multiple straightening wheel assemblies 13 are evenly distributed on the annular lower support plate 14. An annular airbag 12 is secured between each straightening wheel assembly 13 and the inner wall of the lower support sleeve 11. In this embodiment, the axles of the straightening wheels of the straightening wheel assemblies 13 are perpendicular to the horizontal plane, thus preventing them from interfering with the rotation of the drill pipe 6. A compressed gas inlet is provided on the upper surface of the annular airbag 12.

[0022] A stand 8 is provided on the side of the rotary drive mechanism, and the laser cladding head 7 is fixed to the cantilever end 16 of the stand 8 and faces upwards of the positioning sleeve 5. The stand 8 is a lifting stand.

[0023] Working principle:

[0024] When the drill pipe surface is seriously damaged at the oil production site, the drill pipe 6 is hoisted into the wellhead using the on-site hoist so that the damaged position is exposed above the positioning sleeve 5, and vertical positioning is performed using the positioning screws 15 on the positioning sleeve. Compressed air is injected into the annular airbag 12 to expand the annular airbag 12 toward the drill pipe side, so that the straightening wheels of each straightening wheel assembly 13 are tightly attached to the drill pipe 6 to achieve straightening.

[0025] The drill rod 6 is then disconnected from the hoist, and the drive motor 1 is activated, driving the support wheel to rotate, thereby driving the synchronous rotation of the annular base plate 2, the positioning sleeve 5, and the drill rod 6. At this point, the laser cladding head 7 is activated and laser repair is performed, achieving uniform circumferential repair of the damaged area. Simultaneously, the lifting function of the stand 8 allows for fine-tuning of the repair position, thereby improving repair efficiency while ensuring the repair effect.

[0026] The above detailed description of the embodiments of the present invention is intended to be a preferred embodiment of the present invention and should not be construed as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the present invention shall still fall within the scope of this patent.

Claims

1. A laser repair device for oil drill pipes, comprising an annular base plate, a rotary drive mechanism, a straightening mechanism, and a laser cladding head, characterized in that: The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the guide rail is meshed with tooth on upper sprocket wheel, the lower sprocket. The lower sprocket. The lower sprocket. The two guide rails of the present invention are meshed with tooth on upper sprocket.

2. The oil drill pipe laser repair device according to claim 1, characterized in that: The wheel axle of the centralizing wheel of the centralizing wheel assembly is perpendicular to the horizontal plane.

3. The oil drill pipe laser repair device according to claim 1, characterized in that: A compressed gas injection port is provided on the upper surface of the annular airbag.

4. The oil drill pipe laser repair device according to claim 1, characterized in that: The annular seat plate is composed of two symmetrical seat plates, and a U-shaped clamping piece is provided at the edge of the joint of the two seat plates. The U-shaped clamping piece is connected and fixed to the two seat plates by a pair of bolts.

5. The oil drill pipe laser repair device according to claim 1, characterized in that: The positioning sleeve is formed by splicing two symmetrical sleeves.

6. The oil drill pipe laser repair device according to claim 1, characterized in that: The stand is a lifting stand.

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