Grinding device for inner wall of pressure-bearing pup joint of well completion tool

Abstract

The utility model discloses a well completion tool pressure-bearing pup joint inner wall polishing device which comprises a workbench, four connecting rods, a first positioning plate, a second limiting plate, a top plate, a push plate, a supporting plate, a rotating air cylinder, a polishing rod, an electric push rod and a positioning rubber strip. And the two first positioning plates and the second limiting plate are fixedly mounted on the connecting rod in a sleeving manner. According to the device, the pressure-bearing short connecting pipe is embedded into the positioning rubber strip of the arc-shaped structure by holding the pressure-bearing short connecting pipe to be subjected to friction positioning, the pressure-bearing short connecting pipe can be easily clamped and fixed, after polishing is completed, an operator holds the pressure-bearing short connecting pipe to pull outwards, and the pressure-bearing short connecting pipe can be easily taken out from the positioning rubber strip of the arc-shaped structure; the grinding head is driven to rotate through the rotary air cylinder, the electric push rod drives the grinding head to move up and down, and automatic comprehensive grinding treatment on the inner wall of the pressure-bearing short connecting pipe is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of completion tools, and particularly relates to a grinding device for the inner wall of a pressure-bearing nipple of a completion tool. Background Art

[0002] The pressure-bearing nipple belongs to a completion tool assembly. At present, in the process of oil and gas field development, a widely used completion process is to send a ball into the pressure-bearing nipple, seal it and build up pressure to realize the setting of the packer. In order to improve the smoothness of the inner wall of the pressure-bearing nipple pipe, reduce the friction force on the ball, and avoid the problem of jamming, it is necessary to grind the inner wall of the pressure-bearing nipple pipe. At present, the method of manually holding the pipe and passing it through the grinding head for grinding increases the labor intensity of the operator, and it is not convenient to collect the metal powder generated by grinding under negative pressure. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a device that is convenient to clamp and can realize the automatic grinding treatment of the inner wall of the pressure-bearing nipple pipe.

[0004] To solve the above technical problem, the present invention is realized through the following technical solutions: A grinding device for the inner wall of a pressure-bearing nipple of a completion tool, including a workbench, connecting rods, a first positioning plate, a second limiting plate, a top plate, a push plate, a support plate, a rotary cylinder, a grinding rod, an electric push rod and a positioning rubber strip. Four connecting rods are fixedly installed on the workbench in a rectangular distribution. The top plate is fixedly installed on the top of the connecting rods. Two first positioning plates and a second limiting plate are fixedly sleeved on the connecting rods, and a second limiting plate is located at the middle position between the two first positioning plates. An arc-shaped limiting groove is provided at the middle position of the second limiting plate. An arc-shaped accommodating groove is provided on the first positioning plate. Both ends of the positioning rubber strip are hingedly installed on both sides of the arc-shaped accommodating groove, and the positioning rubber strip is located in the arc-shaped accommodating groove. Two support plates are fixedly installed on the left and right sides of the push plate. The support plates are slidably sleeved on the connecting rods. The electric push rod is fixedly installed on the top plate. The actuating rod of the electric push rod is fixedly connected to the center position of the top surface of the push plate. The cylinder body of the rotary cylinder is fixedly installed at the center position of the bottom surface of the push plate. The grinding rod is fixedly installed on the piston rod of the rotary cylinder. A grinding head is fixedly sleeved at the bottom of the grinding rod.

[0005] Preferably, a first through hole is provided at the center position of the workbench, and a negative pressure collecting pipe is fixedly installed in the first through hole.

[0006] Preferably, a second through hole communicating with the arc-shaped accommodating groove is provided on the first positioning plate. A conical positioning column is fixedly installed on the positioning rubber strip, and the conical positioning column is installed in the second through hole.

[0007] Preferably, a guide sleeve is fixedly installed on the support plate, and the guide sleeve is slidably sleeved on the connecting rod.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: By holding the pressure-bearing short pipe and inserting it into the positioning rubber strip with an arc-shaped structure for frictional positioning, the pressure-bearing short pipe can be easily clamped and fixed. After grinding is completed, the operator holds the pressure-bearing short pipe and pulls it outwards, and it can be easily taken out from the positioning rubber strip with an arc-shaped structure. The grinding head is driven to rotate by the rotary cylinder, and the grinding head is driven to move up and down by the electric push rod, so as to realize the automatic and comprehensive grinding treatment of the inner wall of the pressure-bearing short pipe. Description of the Drawings

[0009] The present utility model will be further described below with reference to the drawings.

[0010] Figure 1 is a schematic structural diagram of the present utility model.

[0011] Figure 2 is a top view of the installation structure of the positioning rubber strip. Detailed Embodiment

[0012] The present utility model will be described in detail below in conjunction with the specific embodiments:

[0013] As Figure 1 and Figure 2 shown, a grinding device for the inner wall of a completion tool pressure-bearing short joint includes a workbench 1, a connecting rod 2, a first positioning plate 3, a second limiting plate 4, a top plate 5, a push plate 6, a support plate 61, a rotary cylinder 7, a grinding rod 71, an electric push rod 8, and a positioning rubber strip 9. Four connecting rods 2 are fixedly installed on the workbench 1 in a rectangular distribution. The top plate 5 is fixedly installed on the top of the connecting rod 2. Two first positioning plates 3 and one second limiting plate 4 are fixedly sleeved on the connecting rod 2, and one second limiting plate 4 is located at the middle position between the two first positioning plates 3. A circular arc-shaped limiting groove 41 is provided at the middle position of the second limiting plate 4. An arc-shaped accommodating groove 31 is provided on the first positioning plate 3. Both ends of the positioning rubber strip 9 are hingedly installed on both sides of the arc-shaped accommodating groove 31, and the positioning rubber strip 9 is located in the arc-shaped accommodating groove 31. Two support plates 61 are fixedly installed on the left and right sides of the push plate 6. The support plates 61 are slidably sleeved on the connecting rod 2. The electric push rod 8 is fixedly installed on the top plate 5. The actuating rod of the electric push rod 8 is fixedly connected to the center position of the top surface of the push plate 6. The cylinder body of the rotary cylinder 7 is fixedly installed at the center position of the bottom surface of the push plate 6. The grinding rod 71 is fixedly installed on the piston rod of the rotary cylinder 7. A grinding head is fixedly sleeved at the bottom of the grinding rod 71.

[0014] A first through hole is provided at the central position of the workbench 1. After the pressure-bearing short pipe 10 is placed on the workbench 1, it is in a coaxial communication state with the first through hole. A negative pressure collecting pipe 11 is fixedly installed in the first through hole. The negative pressure collecting pipe 11 is also connected to a metal dust collecting and filtering device. The negative pressure generator is started to make the inside of the negative pressure collecting pipe 11 in a negative pressure state. The metal dust generated during the grinding of the pressure-bearing short pipe 10 is processed through the negative pressure collecting pipe 11 and the metal dust collecting and filtering device.

[0015] A second through hole 30 communicating with the arc-shaped accommodating groove 31 is provided on the first positioning plate 3. A conical positioning post 91 is fixedly installed on the positioning rubber strip 9. The conical positioning post 91 is installed in the second through hole 30. By pressing the conical positioning post 91 to fixedly embed it in the second through hole 30, the positioning rubber strip 9 can be fixed, improving the stability of the positioning rubber strip 9 when positioning the pressure-bearing short pipe 10.

[0016] A guide sleeve 62 is fixedly installed on the support plate 61. The guide sleeve 62 is slidably sleeved on the connecting rod 2 to improve the stability of the up and down movement of the support plate 61.

[0017] The operator holds the pressure-bearing short pipe 10 and inserts it into the arc-shaped accommodating groove 31. The pressure-bearing short pipe 10 squeezes the arc-shaped positioning rubber strip 9 for friction positioning. At the same time, the pressure-bearing short pipe 10 is in contact-limited by the circular arc-shaped limiting groove 41 of the second limiting plate 4. The electric push rod 8 is started to push the combined body of the push plate 6 and the support plate 61 to move downward along the connecting rod 2. After the grinding head enters the pressure-bearing short pipe 10, the piston rod of the rotary cylinder 7 is rotated, driving the grinding rod 71 and the grinding head to rotate to grind the inner wall of the pressure-bearing short pipe 10. At the same time, the actuating rod of the electric push rod 8 extends outwards to push the grinding head to move downward to comprehensively grind the inner wall of the pressure-bearing short pipe 10. After grinding, the operator holds the pressure-bearing short pipe 10 and pulls it outwards, and it can be easily taken out from the arc-shaped positioning rubber strip 9.

Claims

1. A pressure-bearing short-circuit inner wall grinding device for a completion tool, characterized in that: The invention comprises a workbench (1), a connecting rod (2), a first positioning plate (3), a second limiting plate (4), a top plate (5), a push plate (6), a support plate (61), a rotating cylinder (7), a grinding rod (71), an electric push rod (8) and a positioning rubber strip (9), wherein four connecting rods (2) are arranged in a rectangular shape and fixedly mounted on the workbench (1), the top plate (5) is fixedly mounted on the top of the connecting rod (2), two first positioning plates (3) and a second limiting plate (4) are fixedly sleeved and mounted on the connecting rod (2), and a second limiting plate (4) is located at a middle position between the two first positioning plates (3), a circular arc limiting groove (41) is arranged at a middle position of the second limiting plate (4), and a circular arc is arranged on the first positioning plate (3). The push plate (6) is provided with a cylindrical shape receiving groove (31), the two ends of the positioning rubber strip (9) are hingedly mounted on both sides of the cylindrical shape receiving groove (31), and the positioning rubber strip (9) is located in the cylindrical shape receiving groove (31), two support plates (61) are fixedly mounted on the left and right sides of the push plate (6), the support plates (61) are slidably sleeved on the connecting rod (2), the electric push rod (8) is fixedly mounted on the top plate (5), the actuator rod of the electric push rod (8) is fixedly connected to the center position of the top surface of the push plate (6), the cylinder body of the rotary cylinder (7) is fixedly mounted on the center position of the bottom surface of the push plate (6), the grinding rod (71) is fixedly mounted on the piston rod of the rotary cylinder (7), and a grinding head is fixedly sleeved on the bottom of the grinding rod (71).

2. The pressure-bearing short-circuit inner wall grinding device of the completion tool according to claim 1 is characterized in that: A first through hole is provided at the center of the workbench (1), and a negative pressure collection pipe (11) is fixedly installed in the first through hole.

3. The pressure-bearing short-circuit inner wall grinding device of the completion tool according to claim 1 is characterized in that: The first positioning plate (3) is provided with a second through hole (30) connected to the arc-shaped positioning groove (31), and a frustum-shaped positioning column (91) is fixedly mounted on the positioning rubber strip (9), and the frustum-shaped positioning column (91) is mounted in the second through hole (30).

4. The pressure-bearing short-circuit inner wall grinding device of the completion tool according to claim 1 is characterized in that: A guide sleeve (62) is fixedly mounted on the support plate (61), and the guide sleeve (62) is slidably sleeved on the connecting rod (2).

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