Self-adapting clamping supporting forceps

Abstract

The application discloses a self-adaptive clamping supporting tong, which comprises a frame body, an oil cylinder fixed to the frame body, a middle sliding block connected to a piston rod of the oil cylinder, the middle sliding block matched with a sliding groove arranged on the frame body, left and right tong jaw supports symmetrically and movably connected to the frame body on both sides of the middle sliding block, a left tong jaw hingedly connected to one end of the left tong jaw support, the left tong jaw limited by a contact surface of the left tong jaw support, a right tong jaw hingedly connected to one end of the right tong jaw support, the right tong jaw limited by a contact surface of the right tong jaw support, a left pressing structure and a right pressing structure arranged on the left and right tong jaws respectively, a stop wheel arranged on the frame body, a drilling tool detection mechanism arranged at the stop wheel, the stop wheel close to the roots of the left and right tong jaws, a sensor arranged on the frame body and triggered by the drilling tool detection mechanism. The application solves the problems of large gap between the supporting tong and the held drill pipe stand and low stand discharging accuracy in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of oil drilling equipment technology and relates to an adaptive clamping support clamp. Background Technology

[0002] Currently, the level of automation in oil drilling rigs is getting higher and higher, resulting in many automated devices, one of which is the drilling platform robot. This device can complete the removal of drill rods during the tripping process, relieving the labor intensity of drilling workers on the drilling platform and improving the working environment. However, the drilling platform robot currently in use has certain defects in one-click automatic pipe laying and wellhead coupling. The main reasons for this are: (1) The drill rod stud is relatively long, and the deformation of the drill rod stud is constantly changing during the support process of the drilling platform robot, which is not easy to control; (2) In order to adapt to the inclination angle of the stud at different positions and ensure that the support tongs and the drill rod stud are tightly bound, the support tongs used by the current drilling platform robot have a large opening, and the stud shakes a lot in the support tongs, making it difficult to achieve accurate positioning. Through the above analysis, it can be found that the size of the gap between the support tongs and the drill rod stud they hold during the working process has a great influence on the pipe laying accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide an adaptive clamping support clamp that solves the problems of large gap between the support clamp and the drill rod root being held and low accuracy of root placement in the prior art.

[0004] The technical solution adopted in this invention is an adaptive clamping support clamp, including a frame, a hydraulic cylinder fixed to the frame, a piston rod of the hydraulic cylinder connected to a middle slider, the middle slider matching a sliding groove on the frame, and a left jaw bracket and a right jaw bracket symmetrically and movably connected to both sides of the middle slider, one end of which is hinged to the frame. The other end of the left jaw bracket is hinged to a left jaw, which is limited by its contact surface with the left jaw bracket. The other end of the right jaw bracket is hinged to a right jaw, which is limited by its contact surface with the right jaw bracket. The left and right jaws are respectively provided with a left clamping structure and a right clamping structure. The frame is also provided with a stop wheel, and a drill bit detection mechanism is provided at the stop wheel. The stop wheel is close to the root of the left and right jaws. A sensor is provided on the frame, and the sensor is triggered by the drill bit detection mechanism.

[0005] The invention is further characterized in that,

[0006] Both the left and right jaw supports are fixed with pins in the middle. The left and right connecting rods are hinged to the sides of the middle slider, respectively. The other end of the left connecting rod is hinged to the pin in the middle of the left jaw support, and the other end of the right connecting rod is hinged to the pin in the middle of the right jaw support.

[0007] The left clamping structure includes a left rotating shaft that is set along the length of the left jaw and fixed on the left jaw. The left rotating shaft is hinged to a left clamping roller bracket. A left clamping roller is set on the left clamping roller bracket. A left clamping torsion spring is sleeved on the left rotating shaft. The fixed end of the left clamping torsion spring is inserted into the left jaw. The rotating end of the left clamping torsion spring is connected to the left jaw bracket. The left clamping roller is pressed down towards the inside of the left jaw under the action of the left clamping torsion spring. The right clamping structure is the same as the left clamping structure and is symmetrically distributed. The right clamping structure includes a right rotating shaft, a right clamping roller bracket, a right clamping roller, and a right clamping torsion spring.

[0008] The frame is fixed to a fixed shaft by a support, and a retaining wheel is sleeved on the fixed shaft. The drill bit detection mechanism includes a detection frame hinged to the fixed shaft. A detection shaft is set on the detection frame. The movable end of a return spring is connected to the detection frame. The fixed end of the return spring is fixedly connected to the frame. A detection plate is set between the detection frame and the sensor. After the detection frame rotates, it triggers the sensor by contacting the detection plate.

[0009] The very tips of both the left and right jaws are hooked inwards.

[0010] The beneficial effects of this invention are:

[0011] 1) The support clamp of the present invention can be installed on pipe handling equipment such as automatic derrick operators, second-level platform robots, and drilling platform robots, so as to achieve the effect of using one device in multiple places and improve the interchangeability between equipment;

[0012] 2) The left and right jaws of the support tongs can be replaced according to the actual working conditions to meet the support needs of different specifications of drill string such as drill pipe, drill collar, and casing during the drilling process, and have the characteristics of wide adaptability;

[0013] 3) The left and right jaws are equipped with an adaptive clamping mechanism to ensure that the rollers on the left and right jaws keep the drill pipe in a clamped state. This clamping state can be automatically adjusted according to the inclination angle of the drill pipe support.

[0014] 4) The left and right jaws open in parallel, saving space. When the distance between the finger beams of the root box is small, the jaws can also reach into the root area, making it less likely to collide and ensuring high safety.

[0015] 5) The support clamp of the present invention can be installed on the robotic arm on the drilling platform to achieve precise placement of the support rod, and can also achieve alignment and engagement of the male thread of the supported drill pipe with the female thread of the wellhead. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an adaptive clamping support clamp according to the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of an adaptive clamping support clamp according to the present invention;

[0018] Figure 3 This is a schematic diagram of an adaptive clamping support clamp of the present invention when different clamping jaws are installed to handle drill tools of different specifications.

[0019] Figure 4 This is a plan view of the self-adaptive clamping support clamp of the present invention supporting the drill bit.

[0020] In the diagram, 1. Frame, 2. Left jaw, 3. Right jaw, 4. Left rotating shaft, 5. Right rotating shaft, 6. Left clamping roller bracket, 7. Right clamping roller bracket, 8. Left clamping torsion spring, 9. Right clamping torsion spring, 10. Left clamping roller, 11. Right clamping roller, 12. Left jaw bracket, 13. Right jaw bracket, 14. Left connecting rod, 15. Right connecting rod, 16. Middle slider, 17. Hydraulic cylinder, 18. Thrust wheel, 19. Drill tool detection mechanism, 20. Return spring, 21. Sensor. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] This invention provides an adaptive clamping support clamp, such as... Figure 1 As shown, it includes a frame 1, which is installed at the end of equipment such as a drilling platform robot, mainly serving a supporting function. A hydraulic cylinder 17 is fixed to the rear end of the frame 1. Figure 2 As shown, the piston rod of the hydraulic cylinder 17 is connected to a middle slider 16 via a pin. The middle slider 16 matches a sliding groove on the frame 1. A left jaw support 12 and a right jaw support 13, hinged to the frame 1 at their rear ends, are symmetrically connected to both sides of the middle slider 16. Pins are fixed in the middle of both the left jaw support 12 and the right jaw support 13. One end of a left connecting rod 14 and one end of a right connecting rod 15 are hinged to both sides of the middle slider 16 via pins. The other end of the left connecting rod 14 is hinged to the pin in the middle of the left jaw support 12, and the other end of the right connecting rod 15 is hinged to the pin in the middle of the right jaw support 13. The front end of the frame 12 is hinged with a left jaw 2, which is limited by the contact surface with the left jaw support 12. The front end of the right jaw support 13 is hinged with a right jaw 3, which is limited by the contact surface with the right jaw support 13. The left jaw 2 and the right jaw 3 are respectively provided with a left clamping structure and a right clamping structure. The frame 1 is also provided with a stop wheel 18, and a drill bit detection mechanism 19 is provided at the stop wheel 18. The stop wheel 18 is close to the root of the left jaw 2 and the right jaw 3. The frame 1 is provided with a sensor 21, which is triggered by the drill bit detection mechanism 19. The front ends of the left jaw 2 and the right jaw 3 are both hooked inward.

[0023] The left clamping structure includes a left rotating shaft 4 that is set along the length of the left jaw and fixed on the left jaw 2. The left rotating shaft 4 is hinged to a left clamping roller bracket 6. A left clamping roller 10 is set on the left clamping roller bracket 6. A left clamping torsion spring 8 is sleeved on the left rotating shaft 4. The fixed end of the left clamping torsion spring 8 is inserted into the left jaw 2. The rotating end of the left clamping torsion spring 8 is connected to the left jaw bracket 12. The left clamping roller 10 is pressed down towards the inside of the left jaw 2 under the action of the left clamping torsion spring 8. The right clamping structure is the same as the left clamping structure and is symmetrically distributed. The right clamping structure includes a right rotating shaft 5, a right clamping roller bracket 7, a right clamping roller 11, and a right clamping torsion spring 9.

[0024] The frame 1 is fixed to a fixed shaft by a support, and a retaining wheel 18 is sleeved on the fixed shaft. The drill tool detection mechanism 19 includes a detection frame hinged to the fixed shaft. A detection shaft is provided on the detection frame. The detection frame is connected to the movable end of a return spring 20. The fixed end of the return spring 20 is fixedly connected to the frame 1. A detection plate is provided between the detection frame and the sensor 21. After the detection frame rotates, it triggers the sensor 21 by contacting the detection plate.

[0025] The working process and principle of the adaptive clamping support clamp of the present invention are as follows:

[0026] 1) such as Figure 3 The support clamp of the present invention can be equipped with different specifications of clamp jaws. The specifications of the drill bit to be processed are determined and the corresponding specifications of clamp jaws are installed.

[0027] 2) By changing the extension and retraction of the piston rod of the hydraulic cylinder 17, the intermediate slider 16 is driven to move. The intermediate slider 16 adjusts the opening size between the left jaw support 12 and the right jaw support 13 through the left connecting rod 14 and the right connecting rod 15, so as to realize the opening and closing of the left jaw 2 and the right jaw 3.

[0028] 3) such as Figure 4 As shown, when the support clamp of the present invention contains the drill bit and the left clamp 2 and right clamp 3 are closed, the left clamping roller 10 on the left clamping roller bracket 6 automatically presses the drill bit against the stop roller 18 under the action of the left clamping torsion spring 8. Similarly, the right clamping roller 11 on the right clamping roller bracket 7 automatically presses the drill bit against the stop roller 18 under the action of the right clamping torsion spring 9.

[0029] 4) When the stand-up drill bit is being discharged, the opening formed by the left clamping roller 10, the right clamping roller 11 and the stop roller 18 will hold the drill bit tightly under the force of the torsion springs on both sides as the angle of the stand-up drill bit changes, so as to achieve the ideal effect that the stand-up drill bit is neither constricted nor shaken in the support clamp during the discharge process.

[0030] 5) When aligning the male and female threads at the wellhead, the support pliers of the present invention automatically move to the wellhead under the drive of the matching mechanical arm. The opening formed by the left clamping roller 10, the right clamping roller 11 and the stop roller 18 tightly holds the drill string under the force of the torsion springs on both sides. The drill string does not shake after reaching the wellhead each time, and the position of the drill string relative to the support pliers does not change, thereby realizing the alignment of the male and female threads of the holding drill string and the wellhead drill string.

[0031] 6) When the drill bit enters the support, it will first press against the detection shaft of the drill bit detection mechanism 19. When the detection frame of the drill bit detection mechanism 19 rotates to a certain extent, the rotation of the detection plate will trigger the sensor to send a trigger signal, and the support clamp will immediately close.

[0032] 7) When the drill bit leaves the support, the drill bit detection mechanism 19 will rotate to the initial position under the action of the return spring 20.

[0033] As can be seen from the above, the self-adaptive clamping support clamp of the present invention has a simple structure and reliable operation. It solves the problems of large gap between the support clamp and the drill pipe support root during operation and low accuracy of support root placement in the prior art, and realizes accurate support root placement and wellhead coupling.

Claims

1. A self-adaptive clamping support clamp, characterized in that, The system includes a frame (1), on which a hydraulic cylinder (17) is fixed. The piston rod of the hydraulic cylinder (17) is connected to a middle slider (16). The middle slider (16) matches a sliding groove on the frame (1). A left jaw support (12) and a right jaw support (13) are symmetrically and movably connected to both sides of the middle slider (16), with one end hinged to the frame (1). The other end of the left jaw support (12) is hinged to a left jaw (2). The left jaw (2) is limited by its contact surface with the left jaw support (12). The right jaw support... The other end of the frame (13) is hinged to a right jaw (3). The right jaw (3) is limited by the contact surface with the right jaw support (13). The left jaw (2) and the right jaw (3) are respectively provided with a left clamping structure and a right clamping structure. The frame (1) is also provided with a stop wheel (18). A drill bit detection mechanism (19) is provided at the stop wheel (18). The stop wheel (18) is close to the root of the left jaw (2) and the right jaw (3). The frame (1) is provided with a sensor (21). The sensor (21) is triggered by the drill bit detection mechanism (19).

2. The adaptive clamping support clamp according to claim 1, characterized in that, The left claw support (12) and the right claw support (13) are both fixed with pins in the middle. The middle slider (16) is hinged with one end of the left connecting rod (14) and one end of the right connecting rod (15) on both sides respectively. The other end of the left connecting rod (14) is hinged to the pin in the middle of the left claw support (12), and the other end of the right connecting rod (15) is hinged to the pin in the middle of the right claw support (13).

3. The adaptive clamping support clamp according to claim 1, characterized in that, The left clamping structure includes a left rotating shaft arranged along the length of the left jaw and fixed on the left jaw (2). The left rotating shaft (4) is hinged to a left clamping roller bracket (6). A left clamping roller (10) is arranged on the left clamping roller bracket (6). A left clamping torsion spring (8) is sleeved on the left rotating shaft (4). The fixed end of the left clamping torsion spring (8) is inserted into the left jaw (2). The rotating end of the left clamping torsion spring (8) is connected to the left jaw bracket (12). The left clamping roller (10) is pressed down towards the inside of the left jaw (2) under the action of the left clamping torsion spring (8). The right clamping structure is the same as the left clamping structure and is symmetrically distributed. The right clamping structure includes a right rotating shaft (5), a right clamping roller bracket (7), a right clamping roller (11), and a right clamping torsion spring (9).

4. The adaptive clamping support clamp according to claim 1, characterized in that, The frame (1) is fixed to a fixed shaft by a support, and a retaining wheel (18) is sleeved on the fixed shaft. The drill bit detection mechanism (19) includes a detection frame hinged to the fixed shaft. A detection shaft is provided on the detection frame. The detection frame is connected to the movable end of a return spring (20). The fixed end of the return spring (20) is fixedly connected to the frame (1). A detection plate is provided between the detection frame and the sensor (21). After the detection frame rotates, it triggers the sensor (21) by contacting the detection plate.

5. The adaptive clamping support clamp according to claim 1, characterized in that, The front ends of both the left claw (2) and the right claw (3) are hooked inward.

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