Pipe treatment system of petroleum drilling and repairing machine

Abstract

The invention belongs to the technical field of oil drilling, and particularly discloses an oil drilling and workover rig pipe treatment system which comprises a supporting structure and a drawing structure connected to the supporting structure, the supporting structure comprises a base and a supporting piece fixed to the base, the drawing structure is distributed above the supporting piece, and an overturning rod is rotationally arranged at the end, close to the supporting piece, of the base; a supporting hydraulic cylinder is rotationally arranged between the overturning rod and the base, the overturning rod is connected with a clamping piece and a stirring piece, a drill pipe is clamped on the clamping piece, and the stirring piece separates the drill pipe from the clamping piece. The inner pipe in the system is connected with the inserting shell through the lower elastic ring and the extrusion ring, on one hand, the swing amplitude of the drill pipe can be reduced when the drill pipe is replaced, the drill pipe is prevented from being impacted and damaged, on the other hand, drilling fluid discharged by the drill pipe can be guided into a drilled well, and then the drilling fluid is prevented from scouring a well mouth of the drilled well; and the replaced drill pipe can be conveniently inserted into a drilled well.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil drilling, and particularly discloses a pipe handling system of an oil drilling and repairing machine. BACKGROUND

[0002] In oil drilling operations, a pipe inserting and pulling structure is often needed when damaged drill pipes are repaired. The pipe inserting and pulling structure on the market usually comprises an inserting and pulling piece and a support seat, wherein the inserting and pulling piece is slidingly installed on the support seat, and the two are connected through a hydraulic system. In actual operation, the hydraulic system drives the inserting and pulling piece to slide along the support seat, so that the drill pipe in the well is inserted and pulled.

[0003] The pipe inserting and pulling structure can effectively insert and pull the drill pipe, facilitate timely repair and replacement of damaged drill pipes, but it does not have a reasonable pipe discharging structure, so when the damaged drill pipe is discharged from the well, the following problems often exist:

[0004] 1. When replacing the damaged drill pipe, the drilling fluid discharged from the drill pipe is easy to flush the wellhead of the well, and a large amount of drilling fluid flushing the wellhead of the well is easy to cause the geological collapse around the wellhead, which not only affects the smooth reinsertion of the subsequent drill pipe, but also interferes with the continuous drilling operation.

[0005] 2. When replacing the drill pipe, the existing inserting and pulling structure often needs to use external hoisting equipment to transport the drill pipe, and when the external hoisting equipment hoists the drill pipe, the drill pipe is easy to swing, which not only brings great safety hazards, but also may cause surface damage of the drill pipe due to collision, affecting the service life of the drill pipe. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a pipe handling system of an oil drilling and repairing machine to solve the above problems.

[0007] To achieve the above purpose, the present application provides a pipe handling system of an oil drilling and repairing machine, which comprises a support structure and a pulling structure connected to the support structure, wherein the support structure comprises a base and a supporting piece fixed to the base, and the pulling structure is distributed above the supporting piece.

[0008] One end of the base close to the supporting piece is rotatably provided with a turnover rod, a support hydraulic cylinder is rotatably arranged between the turnover rod and the base, a clamping piece and a shifting piece are connected to the turnover rod, the drill pipe is clamped on the clamping piece, the shifting piece separates the drill pipe from the clamping piece, a distribution piece is connected to the part of the base close to the turnover rod, the distribution piece drives the drill pipe to transmit to the clamping piece, and a wellhead protection structure is connected to the part of the base close to the supporting piece.

[0009] The wellhead protection structure comprises a plug shell and an inner tube fixed to the inner wall of the plug shell, an annular net is fixed between the inner tube and the plug shell, the annular net, the inner tube and the plug shell form a hollow cavity structure, and a discharge pipe is fixed to the plug shell.

[0010] In the above technical solution, further, the plug shell comprises an extrusion ring, the extrusion ring is fixed at the position where the plug shell is connected with the inner tube, the extrusion ring is elastic, a lower elastic ring is fixed between the inner wall of the plug shell close to the annular net and the inner tube, and an upper elastic ring is fixed to the inner wall of the plug shell and the upper part of the annular net.

[0011] In the above technical solution, further, a sliding frame is fixed to the outer wall of the plug shell, a sliding groove is formed in the part of the base close to the sliding frame, the two ends of the sliding frame slide in the sliding groove, and an adjusting hydraulic cylinder is connected between the sliding frame and the base.

[0012] In the above technical solution, further, the supporting member comprises a fixed rod fixed to the base, an upright rod is fixed to the upper end of the fixed rod, a supporting frame is fixed to the upright rod, and the supporting frame is used for supporting the drill pipe.

[0013] In the above technical solution, further, a sliding groove is formed in the end of the turnover rod close to the base, an abutting seat is fixed to the end of the turnover rod away from the base, a pulling block slides in the sliding groove, and a pulling hydraulic cylinder rotates between the pulling block and the turnover rod.

[0014] In the above technical solution, further, the pulling structure comprises a sliding rail and a trolley sliding above the sliding rail, a swing arm rotates at the lower part of the trolley, a pulling claw rotates at the lower end of the swing arm, the pulling claw is used for pulling the drill pipe in the well, and the upright rod is fixed to the sliding rail.

[0015] In the above technical solution, further, the clamping member comprises a connecting plate fixed to the turnover rod, a rotating column rotates on the connecting plate, a clamping claw is fixed to the rotating column, a sliding block is fixed to the rotating column, a sliding hole is sleeved on the sliding block, the sliding hole is embedded in the connecting plate, and a third hydraulic cylinder rotates between the clamping claw and the connecting plate.

[0016] In the above technical solution, further, the pushing member comprises a mounting block fixed to the turnover rod, a rotating seat is fixed to the upper end of the mounting block, a discharging claw rotates at the two ends of the rotating seat, and a pushing hydraulic cylinder rotates between the discharging claw and the mounting block.

[0017] Further in the technical scheme, the distribution member comprises an abutting plate fixed on the base, mounting plates fixed on both sides of the abutting plate, oblique plates rotating on both sides of the upper end of the mounting plates, first hydraulic cylinders rotating between the oblique plates and the mounting plates, pushing claws sliding on both sides of the mounting plates, and second hydraulic cylinders rotating between the pushing claws and the mounting plates.

[0018] Further in the technical scheme, the base is provided with distribution racks on both sides, and drill pipes are placed on the distribution racks at equal intervals, and the pushing claws transfer the drill pipes on the distribution racks to the oblique plates.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. The inner tube in the system is connected with the plug-in shell through the lower elastic ring and the extrusion ring, which can reduce the amplitude of the drill pipe swing during the replacement of the drill pipe, avoid the damage of the drill pipe caused by impact, guide the drilling fluid discharged from the drill pipe to the inside of the drilling, and further avoid the erosion of the drilling fluid to the wellhead.

[0021] 2. When the discharge pipe in the system is connected with the external pump, the external pump can suck the drilling fluid around the annular net through the discharge pipe, and at this time, the surrounding of the annular net is in a negative pressure state, which can realize that the drilling fluid around the wellhead penetrates the annular net and enters the inside of the discharge pipe, thereby avoiding the concentration of the drilling fluid around the wellhead and avoiding the erosion of the drilling fluid to the wellhead.

[0022] 3. When the inner tube in the system swings in the inside of the plug-in shell, the inner tube will shake the lower elastic ring, at this time, the drilling fluid on the lower elastic ring will also be shaken, and the drilling fluid in the space composed of the upper and lower elastic rings will also penetrate the annular net in the opposite direction, thereby realizing that the blockage on the annular net is washed by the drilling fluid, avoiding that the blockage affects the drilling fluid penetrating the annular net, and more drilling fluid is left in the wellhead of the drilling. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a structural schematic diagram of the present application;

[0024] Figure 2 The figure is a connection structure diagram of the supporting frame and the vertical rod in the present application;

[0025] Figure 3 The figure is a connection structure diagram of the pulling block and the turnover rod in the present application;

[0026] Figure 4 The figure is an implementation state schematic diagram of the turnover rod transferring the drill pipe to the vertical rod in the present application;

[0027] Figure 5 The figure is a distribution schematic diagram of the distribution rack and the mounting plate in the present application;

[0028] Figure 6 This is a diagram showing the connection structure between the feeding claw and the rotating seat in this invention;

[0029] Figure 7 This is a connection structure diagram of the supporting hydraulic cylinder, the tilting rod, and the base in this invention;

[0030] Figure 8 This is a diagram showing the connection structure between the gripper and the connecting plate in this invention;

[0031] Figure 9 This is a diagram showing the connection structure between the plug-in shell and the base in this invention;

[0032] Figure 10 This is a diagram showing the connection structure between the ring mesh and the plug-in shell in this invention.

[0033] 1. Vertical rod; 11. Support frame; 12. Fixing rod; 2. Base; 21. Supporting hydraulic cylinder; 3. Abutment plate; 31. Mounting plate; 32. First hydraulic cylinder; 33. Inclined plate; 34. Second hydraulic cylinder; 35. Pushing claw; 4. Connecting plate; 41. Rotating column; 42. Sliding block; 43. Sliding hole; 44. Third hydraulic cylinder; 45. Clamping claw; 5. Drill pipe; 6. Tilting rod; 61. Abutment seat; 62. Pulling hydraulic cylinder 63. Pulling block; 64. Slide groove; 7. Discharge claw; 71. Rotary seat; 72. Pushing hydraulic cylinder; 73. Mounting block; 8. Slide rail; 81. Trolley; 82. Pulling claw; 83. Swing arm; 9. Insert shell; 91. Discharge pipe; 92. Ring mesh; 93. Adjusting hydraulic cylinder; 94. Sliding groove; 95. Sliding frame; 96. Upper elastic ring; 97. Lower elastic ring; 98. Extrusion ring; 99. Inner tube; 10. Placement frame. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0036] Example 1: Please refer to Figures 1-10 As shown, the present invention provides a technical solution:

[0037] The present invention is a pipe handling system for an oil drilling rig, comprising a support structure and a pull-out structure connected to the support structure. The support structure includes a base 2 and a support member fixed on the base 2, and the pull-out structure is distributed above the support member.

[0038] A rotating rod 6 is rotatably attached to one end of the base 2 near the support member. A supporting hydraulic cylinder 21 rotates between the rotating rod 6 and the base 2. A clamping member and a toggle member are connected to the rotating rod 6. The clamping member holds the drill pipe 5, and the toggle member separates the drill pipe 5 from the clamping member. A distributing member is connected to the part of the base 2 near the rotating rod 6. The distributing member drives the drill pipe 5 to transfer to the clamping member. A wellhead protection structure is connected to the part of the base 2 near the support member.

[0039] The wellhead protection structure includes a plug shell 9 and an inner tube 99 fixed to the inner wall of the plug shell 9. A ring mesh 92 is fixed between the inner tube 99 and the plug shell 9. The ring mesh 92, the inner tube 99 and the plug shell 9 form a hollow cavity structure. A discharge pipe 91 is fixed on the plug shell 9.

[0040] The plug-in shell 9 includes a compression ring 98, which is fixed at the connection between the plug-in shell 9 and the inner tube 99. The compression ring 98 is elastic. A lower elastic ring 97 is fixed between the inner wall of the plug-in shell 9 near the annular mesh 92 and the inner tube 99. An upper elastic ring 96 is fixed between the inner wall of the plug-in shell 9 and the upper part of the annular mesh 92.

[0041] A sliding frame 95 is fixed to the outer wall of the plug-in housing 9. A sliding groove 94 is provided on the base 2 near the sliding frame 95. The two ends of the sliding frame 95 slide inside the sliding groove 94. An adjusting hydraulic cylinder 93 is connected between the sliding frame 95 and the base 2.

[0042] When the workers want to repair the drill pipe 5 inside the well, they place the base 2 around the well, then put the inner tube 99 on the drill pipe 5 to be repaired, and then start the adjusting hydraulic cylinder 93. The adjusting hydraulic cylinder 93 will drive the plug shell 9 to be inserted into the inside of the well through the sliding frame 95. Then the pulling structure will pull the drill pipe 5 to be repaired out of the inside of the well, which will make it easy for the workers to repair the damaged drill pipe 5.

[0043] When the damaged drill pipe 5 is pulled out of the well, it is necessary to ensure that the undamaged drill pipe 5 is also pulled out of the well. The length of the undamaged drill pipe 5 pulled out is determined according to actual needs. The support component will support the drill pipe 5 pulled out of the well, which can make the damaged drill pipe 5 move vertically upward. At the same time, the support hydraulic cylinder 21 drives the flipping rod 6 to flip. It is necessary to keep the flipping rod 6 perpendicular to the base 2. Then the clamping component at the bottom of the flipping rod 6 clamps the undamaged drill pipe 5, which makes it easy for the staff to remove the damaged drill pipe 5 from the undamaged drill pipe 5.

[0044] According to the existing method of disassembling the drill pipe 5, when the worker disassembles the damaged drill pipe 5 from the undamaged drill pipe 5, the worker will use a shielding structure to shield the part of the drill pipe 5 being disassembled. This method is to prevent the drilling fluid sprayed from the drill pipe 5 from splashing. However, when the drilling fluid is shielded by the shielding structure, the drilling fluid will flow back into the well through the wellhead. This will cause the drilling fluid to flush the wellhead of the well, which may easily lead to the collapse of the wellhead of the well, making it difficult to insert the repaired drill pipe 5 into the well. In order to solve this problem, a ring mesh 92 is connected between the inner tube 99 and the plug shell 9.

[0045] When the damaged drill pipe 5 is removed from the undamaged drill pipe 5, the drilling fluid ejected from the drill pipe 5 will flow back into the inside of the well under the guidance of the inner pipe 99. As the drill pipe 5 is pulled out from the inside of the well, the drilling fluid will be concentrated at the wellhead of the well under the action of the drill pipe 5. At this time, the discharge end of the discharge pipe 91 is connected to the external pump. The external pump can extract the drilling fluid inside the lower elastic ring 97 and the upper elastic ring 96 through the discharge pipe 91. This makes the cavity between the lower elastic ring 97 and the upper elastic ring 96 a negative pressure state, thereby realizing the discharge of the drilling fluid inside the wellhead driven by the external pump.

[0046] During the fabrication of the wellhead protection structure, the lower elastic ring 97, facing away from the plug shell 9, is fixed between the annular mesh 92 and the inner tube 99. Simultaneously, the end of the inner tube 99 facing away from the lower elastic ring 97 is fixed to the plug shell 9 via a compression ring 98. This allows the drilling fluid ejected from the drill pipe 5 to flow back into the well under the guidance of the inner tube 99 when the plug shell 9 is inserted into the well. When the drilling fluid flows back into the well under the guidance of the inner tube 99, it impacts the inner tube 99. Both the compression ring 98 and the lower elastic ring 97 connected to the end of the inner tube 99 are elastic. This allows the inner tube 99 to vibrate on the plug shell 9 when the drilling fluid impacts it. When the inner tube 99 vibrates on the plug shell 9, the lower elastic ring 97 is shaken, thus preventing particulate matter in the drilling fluid from adhering to the lower elastic ring 97, facilitating the collection of drilling fluid by the discharge pipe 91.

[0047] Meanwhile, when the drill pipe 5 is pulled out from the inside of the well, if the drill pipe 5 shakes, the outer wall of the drill pipe 5 will hit the inner tube 99. Since the compression ring 98 and the lower elastic ring 97 connected to the end of the inner tube 99 are both elastic, the gas pressure inside the space formed by the inner tube 99, the lower elastic ring 97 and the compression ring 98 can be increased. The repulsive force generated by the gas pressure and the restoring force of the lower elastic ring 97 and the compression ring 98 can drive the inner tube 99 to reset, thereby buffering the swing amplitude of the drill pipe 5 and avoiding a large swing amplitude when the drill pipe 5 is pulled out from the inside of the well.

[0048] When the inner tube 99 swings inside the plug shell 9, the inner tube 99 will cause the lower elastic ring 97 to oscillate. At this time, the drilling fluid on the lower elastic ring 97 will also be oscillated. Meanwhile, the drilling fluid inside the space formed by the upper elastic ring 96 and the lower elastic ring 97 will also penetrate the annular mesh 92 in the opposite direction. This will allow the blockage on the annular mesh 92 to be flushed by the drilling fluid, preventing the blockage from affecting the drilling fluid's penetration of the annular mesh 92. As a result, more drilling fluid will remain in the wellhead of the well.

[0049] Example 2: Please refer to Figures 1-10 As shown, based on Embodiment 1, the present invention provides a technical solution. Unlike Embodiment 1, the clamping member in this embodiment can clamp the damaged drill pipe 5 separated inside the well. Then, the actuating member drives the damaged drill pipe 5 to separate from the flipping rod 6. Subsequently, the separating member can drive the drill pipe 5 inside the placement frame 10 to be replaced on the flipping rod 6, thereby facilitating the flipping rod 6 to drive the drill pipe 5 to connect with the drill pipe 5 inside the well.

[0050] The support includes a fixing rod 12 fixed to the base 2, a vertical rod 1 fixed to the upper end of the fixing rod 12, and a support frame 11 fixed to the vertical rod 1. The support frame 11 is used to support the drill pipe 5.

[0051] A sliding groove 64 is provided at one end of the flipping rod 6 near the base 2, and an abutment seat 61 is fixed at the other end of the flipping rod 6 away from the base 2. A pulling block 63 slides inside the sliding groove 64, and a pulling hydraulic cylinder 62 rotates between the pulling block 63 and the flipping rod 6.

[0052] The pulling structure includes a slide rail 8 and a trolley 81 that slides above the slide rail 8. The trolley 81 includes a structure that drives the trolley 81 to move on the slide rail 8. A swing arm 83 rotates at the lower part of the trolley 81, and a pulling claw 82 rotates at the lower end of the swing arm 83. The pulling claw 82 is used to pull the drill pipe 5 inside the well. The vertical rod 1 is fixed on the slide rail 8. The pulling structure is a structure for pulling drill pipes in existing oil drilling operations and is within the scope of knowledge of those skilled in the art.

[0053] The clamping component includes a connecting plate 4 fixed on the flipping rod 6, a rotating column 41 rotating on the connecting plate 4, a gripper 45 fixed on the rotating column 41, a sliding block 42 fixed on the rotating column 41, a sliding hole 43 sleeved on the sliding block 42, the sliding hole 43 embedded in the connecting plate 4, and a third hydraulic cylinder 44 rotating between the gripper 45 and the connecting plate 4.

[0054] When the workers want to pull the drill pipe 5 out of the well, they clamp the puller 82 onto the drill pipe 5, and then the trolley 81 moves up along the slide rail 8. The trolley 81 can drag the puller 82 through the swing arm 83, thereby pulling the puller 82 to pull the drill pipe 5 out of the well.

[0055] When the drill pipe 5 is pulled out from the inside of the well, the drill pipe 5 will move upward under the guidance of the support frame 11. This allows the drill pipe 5 pulled out from the well to move only vertically, which makes it easier for the staff to separate the damaged drill pipe 5 from the undamaged drill pipe 5. It should be noted that the support frame 11 is a U-shaped frame structure fixed on the vertical rod 1.

[0056] When the trolley 81 moves to the top of the slide rail 8, the external controller stops the trolley 81 from moving downwards. Then, the external controller controls the third hydraulic cylinder 44 to work. The third hydraulic cylinder 44 can drive the jaws 45 to clamp the drill pipe 5, which can realize the extraction and fixation of the drill pipe 5. Then, the external controller controls the pulling jaws 82 to separate from the drill pipe 5, and at the same time controls the trolley 81 to move downwards. Then, the external controller controls the pulling jaws 82 to clamp the drill pipe 5, and at the same time controls the trolley 81 to move upwards on the slide rail 8. This process is repeated to completely extract the damaged drill pipe 5 from the inside of the well.

[0057] The actuating component includes a mounting block 73 fixed on the flipping rod 6. A rotating seat 71 is fixed to the upper end of the mounting block 73. The two ends of the rotating seat 71 have rotatable feeding claws 7. A push hydraulic cylinder 72 rotates between the feeding claws 7 and the mounting block 73.

[0058] The dispensing component includes an abutment plate 3 fixed on a base 2, mounting plates 31 fixed on both sides of the abutment plate 3, inclined plates 33 rotating on both sides of the upper end of the mounting plate 31, a first hydraulic cylinder 32 rotating between the inclined plates 33 and the mounting plate 31, pushing claws 35 sliding on both sides of the mounting plate 31, and a second hydraulic cylinder 34 rotating between the pushing claws 35 and the mounting plate 31.

[0059] The base 2 has two sides of a placement rack 10, on which drill pipes 5 are stacked at equal intervals. The push claw 35 transfers the drill pipes 5 on the placement rack 10 to the inclined plate 33.

[0060] When the damaged drill pipe 5 is completely extracted from the inside of the well, it is necessary to ensure that a portion of the undamaged drill pipe 5 is extracted from the inside of the well. The length of the undamaged drill pipe 5 extracted must be sufficient to ensure that the jaws 45 at the bottom of the flipping rod 6 can hold the drill pipe 5. Then, the workers remove the drill pipe 5 to be repaired from the undamaged drill pipe 5. After the drill pipe 5 to be repaired is removed from the undamaged drill pipe 5, the external controller operates the third hydraulic cylinder 44, which enables the third hydraulic cylinder 44 to drive the jaws 45 to hold the damaged drill pipe 5. Then, the external controller controls the third hydraulic cylinder 44 at the bottom of the flipping rod 6 to stop working. At this time, the jaws 45 at the bottom of the flipping rod 6 do not hold the undamaged drill pipe 5.

[0061] Before the jaws 45 separate from the undamaged drill pipe 5, the external controller controls the pulling hydraulic cylinder 62 to work. At this time, the pulling block 63 can move upward inside the slide groove 64, which can realize the pulling block 63 dragging the joint part of the drill pipe 5. The joint part shown here is the part of the connecting end of the drill pipe 5 when the two drill pipes 5 are connected, which is within the scope of those skilled in the art. When the pulling block 63 drags the joint part of the drill pipe 5, the external controller controls the pulling hydraulic cylinder 62 to reset, which can then realize the pulling block 63 slowly driving the drill pipe 5 to be inserted into the well.

[0062] It should be noted that when the pulling block 63 slowly drives the drill pipe 5 into the well, the joint of the drill pipe 5 will protrude from the wellhead. This is so that the workers can splice the two drill pipes 5 together during the drilling operation.

[0063] After the gripper 45 clamps the drill pipe 5 to be repaired, the external controller controls the support hydraulic cylinder 21 to reset. At this time, the flipping rod 6 will abut against the abutment plate 3. Then, the external controller controls the third hydraulic cylinder 44 at the bottom of the flipping rod 6 to stop working. At this time, the gripper 45 at the bottom of the flipping rod 6 will not clamp the damaged drill pipe 5. Then, the external controller controls the push hydraulic cylinder 72 to work, which can drive the unloading claw 7 to pry the damaged drill pipe 5, thereby separating the damaged drill pipe 5 from the connecting plate 4.

[0064] After the damaged drill pipe 5 is separated from the connecting plate 4, the external controller controls the hydraulic cylinder 72 to reset, and then controls the second hydraulic cylinder 34 to work. The second hydraulic cylinder 34 can drive the push claw 35 to pick up the drill pipe 5 on the placement frame 10. During this process, the external controller controls the first hydraulic cylinder 32 to work. At this time, the end of the inclined plate 33 near the abutment plate 3 tilts downward, so that the drill pipe 5 picked up by the push claw 35 driven by the inclined plate 33 can be guided to the connecting plate 4. Then the external controller controls the third hydraulic cylinder 44 to drive the clamping claw 45 to clamp the drill pipe 5 separated from the placement frame 10, so that the drill pipe 5 on the connecting plate 4 can be replaced.

[0065] After the gripper 45 clamps the drill pipe 5 separated from the placement frame 10, the external controller controls the support hydraulic cylinder 21 to work, which enables the flipping rod 6 to drive the drill pipe 5 to be inserted into the support frame 11, so that the support frame 11 drives the drill pipe 5 to connect with the drill pipe 5 inserted inside the well. After the flipping rod 6 drives the drill pipe 5 to connect with the drill pipe 5 inserted inside the well, the operator connects the two drill pipes 5 to each other, so that the damaged drill pipe 5 can be replaced through the system.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A pipe handling system for an oil drilling rig, comprising a support structure and a pull-out structure connected to the support structure, characterized in that: The support structure includes a base (2) and a support member fixed on the base (2), and the pull structure is distributed above the support member; The base (2) has a rotating flip rod (6) at one end near the support member. A supporting hydraulic cylinder (21) rotates between the flip rod (6) and the base (2). A clamping member and a toggle member are connected to the flip rod (6). The clamping member holds the drill pipe (5). The toggle member separates the drill pipe (5) from the clamping member. A distributing member is connected to the part of the base (2) near the flip rod (6). The distributing member drives the drill pipe (5) to pass to the clamping member. A wellhead protection structure is connected to the part of the base (2) near the support member. The wellhead protection structure includes a plug shell (9) and an inner tube (99) fixed on the inner wall of the plug shell (9). A ring mesh (92) is fixed between the inner tube (99) and the plug shell (9). The ring mesh (92), the inner tube (99) and the plug shell (9) form a hollow cavity structure. A discharge pipe (91) is fixed on the plug shell (9).

2. The oil drilling rig pipe handling system according to claim 1, characterized in that, The plug-in shell (9) includes a compression ring (98), which is fixed at the connection between the plug-in shell (9) and the inner tube (99). The compression ring (98) is elastic. A lower elastic ring (97) is fixed between the inner wall of the plug-in shell (9) near the annular mesh (92) and the inner tube (99). An upper elastic ring (96) is fixed between the inner wall of the plug-in shell (9) and the upper part of the annular mesh (92).

3. The oil drilling rig pipe handling system according to claim 1, characterized in that, The outer wall of the plug shell (9) is fixed with a sliding frame (95), and the base (2) is provided with a sliding groove (94) near the sliding frame (95). The two ends of the sliding frame (95) slide inside the sliding groove (94), and an adjusting hydraulic cylinder (93) is connected between the sliding frame (95) and the base (2).

4. The oil drilling rig pipe handling system according to claim 1, characterized in that, The support includes a fixed rod (12) fixed on the base (2), a vertical rod (1) fixed at the upper end of the fixed rod (12), and a support frame (11) fixed on the vertical rod (1). The support frame (11) is used to support the drill pipe (5).

5. The oil drilling rig pipe handling system according to claim 1, characterized in that, The flipping rod (6) has a groove (64) at one end near the base (2), and an abutment seat (61) is fixed at the other end of the flipping rod (6) away from the base (2). A pulling block (63) slides inside the groove (64), and a pulling hydraulic cylinder (62) rotates between the pulling block (63) and the flipping rod (6).

6. The oil drilling rig pipe handling system according to claim 4, characterized in that, The pulling structure includes a slide rail (8) and a trolley (81) that slides above the slide rail (8). The lower part of the trolley (81) has a swing arm (83) that rotates, and the lower end of the swing arm (83) has a pulling claw (82) that rotates. The pulling claw (82) is used to pull the drill pipe (5) inside the well. The vertical rod (1) is fixed on the slide rail (8).

7. The oil drilling rig pipe handling system according to claim 1, characterized in that, The clamping component includes a connecting plate (4) fixed on a flipping rod (6), a rotating column (41) rotating on the connecting plate (4), a gripper (45) fixed on the rotating column (41), a sliding block (42) fixed on the rotating column (41), a sliding hole (43) sleeved on the sliding block (42), the sliding hole (43) being embedded in the connecting plate (4), and a third hydraulic cylinder (44) rotating between the gripper (45) and the connecting plate (4).

8. The oil drilling rig pipe handling system according to claim 1, characterized in that, The actuating component includes a mounting block (73) fixed on the flipping rod (6), a rotating seat (71) fixed at the upper end of the mounting block (73), and a feeding claw (7) rotating at both ends of the rotating seat (71). A pushing hydraulic cylinder (72) rotates between the feeding claw (7) and the mounting block (73).

9. The oil drilling rig pipe handling system according to claim 1, characterized in that, The dispensing component includes an abutment plate (3) fixed on a base (2), mounting plates (31) fixed on both sides of the abutment plate (3), inclined plates (33) rotating on both sides of the upper end of the mounting plate (31), a first hydraulic cylinder (32) rotating between the inclined plate (33) and the mounting plate (31), pushing claws (35) sliding on both sides of the mounting plate (31), and a second hydraulic cylinder (34) rotating between the pushing claws (35) and the mounting plate (31).

10. The oil drilling rig pipe handling system according to claim 9, characterized in that, The base (2) has a placement rack (10) on both sides, and the placement rack (10) has drill pipes (5) stacked at equal intervals. The push claw (35) transfers the drill pipes (5) on the placement rack (10) to the inclined plate (33).

Images