Lightweight hydraulic drilling tongs

Abstract

The invention discloses a portable hydraulic pliers for drilling tools, comprising a lower pliers body, an upper pliers body and an upper plate. The lower pliers body comprises a lower pliers body bracket, anticline jaw plate, a wedge plate, a lower pliers body clamping oil cylinder, a synchronous pull rod and a synchronous pull plate. The lower pliers body clamping oil cylinder drives the wedge plate to move through the synchronous pull plate and the synchronous pull rod, so as to realize the clamping action of two anticline jaw plates on the drilling tools. The upper pliers body comprises an upper pliers body bracket, an inner groove, a ramp plate, a jaw plate, a notched gear and a motor gear. A gear slide plate is fixed on the upper plate, and the hydraulic motor drives the notched gear to rotate through the motor gear, so as to realize the ramp plate of the jaw plate in the inner groove, and realize the rotation of the upper pliers body while clamping the drilling tools. The lower pliers body of the portable hydraulic pliers for drilling tools has a large torque for clamping the drilling tools and is not easy to slip. The upper pliers body adopts a hydraulic clamping clamping method, which has a large clamping torque and good fixation, and ensures that the upper pliers body rotates smoothly and effectively. At the same time, it is practical and durable, easy to operate, and reduces the manufacturing and maintenance costs.

Description

Technical Field

[0001] The invention relates to a drilling tool hydraulic pliers, in particular to a portable drilling tool hydraulic pliers mainly used for oil drilling operations. Background Art

[0002] In drilling operations, it is often necessary to clamp the drill pipe with a power tong to achieve the tightening and loosening of the drill pipe. However, the current common power tongs are hydraulic and pneumatic tongs developed and produced in 1979, which have the following defects:

[0003] 1. The weight of the hydraulic tongs is as high as 2,500 kg. It is suspended on a small crossbeam of the derrick with limited load, which poses certain safety risks.

[0004] 2. The manual hand winch is used to adjust the height up and down, which is slow, and has poor stability and accuracy;

[0005] 3. The clamp structure is complex, and the operators have to cross-operate, which leads to poor adaptability to the environment and a high failure rate, affecting production efficiency.

[0006] 4. There are many dynamic processes in power transmission, and the kinetic energy loss is large. Due to the wear and pollution of parts, especially the unstable air pressure of the pneumatic clutch and the wear of the friction plate, the rated output torque value cannot be reached;

[0007] 5. Due to the extremely harsh working environment of unbuckling the drill bit, there is no protection against mud splashing, the clamping efficiency of the drill bit is low, the drill bit slips and idles, and the drill bit and the jaws are scratched and damaged;

[0008] 6. High manufacturing, repair and maintenance costs.

[0009] It can be seen that the existing hydraulic and pneumatic tongs are not only complex in structure, require high maintenance, and are prone to failure, but also have high manufacturing costs, large size, and high weight. Summary of the invention

[0010] In order to overcome the above defects, the present invention provides a portable drilling tool hydraulic tongs, which is not only practical and durable, easy to operate, but also reduces the manufacturing and maintenance costs.

[0011] The technical solution adopted by the present invention to solve its technical problem is:

[0012] A portable drilling tool hydraulic tongs, comprising:

[0013] A lower caliper body, the lower caliper body having a lower caliper body bracket with an opening at the front side, two anticline jaw plates are symmetrically arranged on the left and right sides of the opening end of the lower caliper body bracket, and a wedge plate is respectively arranged on the outer sides of the two anticline jaw plates, the two wedge plates and the two anticline jaw plates are in contact with each other through an inclined surface, a lower caliper body clamping cylinder and a synchronous pull plate are arranged on the rear side of the lower caliper body bracket, two synchronous pull rods are arranged on the left and right sides of the lower caliper body bracket, the front ends of the two synchronous pull rods are respectively fixedly connected to the two wedge plates, the rear ends of the two synchronous pull rods are respectively fixedly connected to the two ends of the synchronous pull plate, and the synchronous pull plate is fixedly connected to the piston rod of the lower caliper body clamping cylinder;

[0014] The upper caliper body comprises an upper caliper body bracket with a through hole in the center and an opening on the front side, wherein the through hole gradually increases and then decreases along the radius of both sides of the opening to form two symmetrical inner grooves, wherein a ramp plate and a jaw plate are respectively arranged in the two inner grooves; a notched gear is fixed on the upper side surface of the upper caliper body bracket, and the notched gear is transmission-connected to the motor gear;

[0015] An upper plate, on which a gear slide plate and a hydraulic motor are fixed, the upper side surface of the notched gear is rotatably connected to the gear slide plate, a through hole with a front opening is provided in the center of the gear slide plate, and together with the central through hole of the upper caliper body and the front opening of the lower caliper body, a drill hole is formed; the hydraulic motor has an output transmission shaft, namely a motor transmission shaft, which extends downward to the upper caliper body, and the motor gear is fixed on the motor transmission shaft.

[0016] As a further improvement of the present invention, an upper clutch plate is fixed on the motor transmission shaft, a lower clutch plate matching the upper clutch plate is correspondingly provided below the upper clutch plate, a clutch cylinder is provided below the lower clutch plate, and the piston rod of the clutch cylinder is fixedly connected to the lower clutch plate; a punching hydraulic cylinder is provided below the upper plate, and the piston rod of the punching hydraulic cylinder is connected to the clutch crank through a pin shaft, and the clutch crank is fixed on the lower clutch plate.

[0017] As a further improvement of the present invention, a lifting hydraulic cylinder is provided on the upper plate.

[0018] As a further improvement of the present invention, the two anticline jaw plates are respectively provided with return springs for making them move toward each other, and the two anticline jaw plates are respectively provided with jaw teeth on the opposite inner sides.

[0019] As a further improvement of the present invention, two transition gears meshing with the notch gear are provided on the outer side of the notch gear, and the two transition gears mesh with the motor gear at the same time.

[0020] As a further improvement of the present invention, an upper caliper body fixing tube is fixed on the upper caliper body bracket, and an upper floating spring is arranged inside the upper caliper body fixing tube; a lower caliper body fixing tube is fixed on the lower caliper body bracket, and a lower floating spring is arranged inside the lower caliper body fixing tube; the upper caliper body fixing tube is movably placed inside the lower caliper body fixing tube.

[0021] As a further improvement of the present invention, the upper plate located at one side of the drill hole is provided with a mud splash prevention mechanism, and the mud splash prevention mechanism has a mud guard and a rotating shaft.

[0022] As a further improvement of the present invention, the front opening of the lower clamp body is square.

[0023] As a further improvement of the present invention, the gear slide plate is a two-petal structure.

[0024] As a further improvement of the present invention, a multi-way reversing valve (6) is provided to control the operation of each hydraulic cylinder and air cylinder.

[0025] The beneficial effects of the present invention are:

[0026] 1. It is relatively light, only 1,500 kg. It is suspended on the small crossbeam of the derrick with limited load, which reduces the safety risk;

[0027] 2. The upper jaw plate is an active climbing variable diameter, and the initial clamping torque of the drill bit is large and not easy to slip;

[0028] 3. The lower clamp body adopts hydraulic clamping method, which has large clamping torque and good fixation, ensuring the smooth and effective rotation of the upper clamp body;

[0029] 4. The lower clamp body embraces and clamps the jaw plate, adopting an anticline <-shaped structure, so there is no need to change the jaw plate specifications and sizes for drilling tools with different diameters;

[0030] 5. The initial pre-tightening of the screw thread is done by a hydraulic motor, which has a small torque and a fast speed. The tightening and loosening of the screw thread is done by a hydraulic cylinder, which has a large torque and a slow speed.

[0031] 6. The overall structure is simple, the initial twist and high torque punch adopt different power modes, and the power transmission loss is small;

[0032] 7. Simple structure, anti-fouling and durable, easy to operate, repair and maintain;

[0033] 8. Mud splash protection facilities are installed to provide certain protection for professionals, equipment and environment;

[0034] 10. Equipped with a hydraulic cylinder lifting mechanism, which is convenient for real-time height adjustment. The hydraulic cylinder also has a boom function;

[0035] 11. It has explosion-proof, waterproof and anti-fouling functions;

[0036] 12. Low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0039] Figure 3 It is the front view of the present invention;

[0040] Figure 4 for Figure 3 Schematic diagram of the cross-section structure along AA;

[0041] Figure 5 for Figure 3 Schematic diagram of the cross-section structure along CC direction;

[0042] Figure 6 for Figure 3 Schematic diagram of the cross-section structure along DD direction;

[0043] Figure 7 for Figure 3 Schematic diagram of the cross-section structure along the EE direction.

[0044] Combined with the accompanying drawings, the following description is given:

[0045] 1——lower clamp body; 11——lower clamp body bracket;

[0046] 12——Anticline jaw plate; 13——Wedge plate;

[0047] 14——synchronous pull rod; 15——synchronous pull plate;

[0048] 16——Lower caliper body clamping cylinder; 17——Lower caliper body fixing tube;

[0049] 18——Lower floating spring; 2——Upper clamp body;

[0050] 21——Upper clamp body bracket; 22——Jaw plate;

[0051] 23——Notched gear; 24——Motor gear;

[0052] 25——transition gear; 27——upper clamp body fixing tube;

[0053] 28——upper floating spring; 3——upper plate;

[0054] 31——gear slide plate; 32——hydraulic motor;

[0055] 33——motor transmission shaft; 41——upper clutch plate;

[0056] 42——lower clutch plate; 43——clutch cylinder;

[0057] 44——punch hydraulic cylinder; 45——pin shaft;

[0058] 46 – clutch crank; 5 – lifting hydraulic cylinder;

[0059] 6——Multi-way reversing valve; 7——Drilling tools;

[0060] 81——Fender; 82——Spindle;

[0061] 26——Slope board. DETAILED DESCRIPTION

[0062] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0063] See also Figure 1-7 , which is a preferred embodiment of the portable drilling tool hydraulic pliers described in the present invention, mainly includes: a lower pliers body 1, an upper pliers body 2, an upper plate 3 and other components.

[0064] The lower caliper body 1 has a lower caliper body bracket 11 with a front opening, and the front opening is preferably square. Two anticline jaw plates 12 are symmetrically arranged on the left and right sides of the opening end of the lower caliper body bracket 11, and a wedge plate 13 is respectively arranged on the outer sides of the two anticline jaw plates 12. A lower caliper body clamping cylinder 16 and a synchronous pull plate 15 are arranged on the rear side of the lower caliper body bracket. Two synchronous pull rods 14 are arranged on the left and right sides of the lower caliper body bracket. The front ends of the two synchronous pull rods 14 are respectively fixedly connected to the two wedge plates 13, and the rear ends of the two synchronous pull rods 14 are respectively fixedly connected to the two ends of the synchronous pull plate 15, and the synchronous pull plate 15 is fixedly connected to the piston rod of the lower caliper body clamping cylinder 16. The piston rod of the lower clamp body clamping cylinder 16 is arranged parallel to the two synchronous pull rods 14, the synchronous pull plate 15 is arranged perpendicular to the synchronous pull rods 14, and the two wedge plates 13 and the two anticline jaw plates 12 are in contact through the inclined surface, that is, the inner side surface of the wedge plate 13 is arranged as an inclined surface with an acute angle with the synchronous pull rod, and the outer side surface of the anticline jaw plate 12 is also arranged as an inclined surface parallel to the inner side surface of the wedge plate 13, and the two are in contact and interact with each other through the inclined surface. In addition, the two anticline jaw plates 12 are respectively provided with a reset spring to make them move toward each other, and the two anticline jaw plates 12 are respectively provided with jaw teeth on the opposite inner side surfaces.

[0065] When the lower clamp body is working, it mainly clamps the drilling tool 7 placed in the lower clamp body bracket 11 with a front opening. Figure 3The oil intake of the clamping cylinder 16 of the lower clamp body drives its piston rod to move to the right, and at the same time drives the synchronous pull plate 15 and the two synchronous pull rods 14 to move to the right together, and the two wedge plates 13 fixed to the left ends of the two synchronous pull rods 14 also move to the right synchronously. Since the two wedge plates 13 and the two anticline jaw plates 12 are in contact through the inclined surfaces, the synchronous left and right movement of the two wedge plates 13 squeezes the two anticline jaw plates 12 inwardly, and the inner sides of the two anticline jaw plates 12 are provided with clamp teeth. After the two anticline jaw plates 12 approach each other, they clamp the drilling tool 7 located in the front opening of the lower clamp body bracket 11, thereby realizing the clamping action of the drilling tool 7.

[0066] The upper caliper body 2 has an upper caliper body bracket 21 with a through hole in the center and an opening in the front side. The central through hole of the upper caliper body bracket 21 gradually increases and decreases along the radius of the two sides of the opening to form two symmetrical inner grooves, and a jaw plate 22 is respectively provided in the two inner grooves; a notch gear 23 is fixed on the upper side surface of the upper caliper body bracket, and the notch gear is transmission-connected to the motor gear 24. Preferably, two transition gears 25 meshing with the notch gear 23 are provided on the outer side of the notch gear 23, and the two transition gears 25 mesh with the motor gear 24 at the same time.

[0067] Among them, a gear slide plate 31 and a hydraulic motor 32 are fixed on the upper plate 3. The gear slide plate 31 is preferably a two-petal structure. The upper side of the notched gear 23 is rotatably connected to the gear slide plate 31. The center of the gear slide plate is provided with a through hole with a front opening, which forms a cocircular bore together with the central through hole of the upper caliper body and the front opening of the lower caliper body. The hydraulic motor 32 has an output transmission shaft, namely a motor transmission shaft 33, which extends downward to the upper caliper body, and the motor gear 24 is fixed to the motor transmission shaft.

[0068] The upper caliper body 2 is mainly used to rotate the drilling tool 7 placed in the central through hole of the upper caliper body bracket 21. When working, the hydraulic motor 32 on the upper plate 3 works to drive the motor transmission shaft to rotate, and the motor gear 24 is fixed on the motor transmission shaft 33 and rotates synchronously with the motor gear 24. When the motor gear 24 rotates, the notch gear 23 is driven to rotate synchronously through the two transition gears 25, and the notch gear 23 is fixed on the upper caliper body bracket 21 and is rotatably connected with the gear slide plate 31 fixed on the upper plate. Therefore, the rotation of the notch gear 23 will drive the upper caliper body bracket and the upper caliper body to rotate as a whole, thereby realizing the rotation of the drilling tool.

[0069] Among them, an upper clutch plate 41 is fixed on the motor transmission shaft 33, and a lower clutch plate 42 matching the upper clutch plate is correspondingly provided below the upper clutch plate, and a clutch cylinder 43 is provided below the lower clutch plate, and the piston rod of the clutch cylinder is fixedly connected to the lower clutch plate 42; a punching hydraulic cylinder 44 is provided below the upper plate 3, and the piston rod of the punching hydraulic cylinder is connected to the clutch crank 46 through a pin shaft 45, and the clutch crank is fixed on the lower clutch plate 42. The arrangement of the upper and lower clutch plates and their punching and buckling hydraulic cylinder 44 and other components can realize the punching and buckling operation. The clutch cylinder 43 acts as a piston rod to drive the lower clutch plate 42 to connect and separate with the upper clutch plate 41. When the clutch cylinder 43 drives the lower clutch plate 42 to move upward and connect with the upper clutch plate 41, the punching and buckling hydraulic cylinder 44 is actuated to drive the lower clutch plate 42 to rotate through the clutch crank 46. The upper clutch plate 41, the motor drive shaft 33, and the motor gear 24 are originally fixed together. Therefore, the action of the punching and buckling hydraulic cylinder 44 is transmitted to the motor drive shaft 33 and the motor gear 24 through the lower clutch plate 42 and the upper clutch plate 41, so that the motor gear 24 rotates, and then drives the transition gear 25 and the notch gear 23 to transmit the driving torque to the jaw plate 22 and rotate, thereby achieving the purpose of punching and buckling.

[0070] Among them, an upper jaw body fixing tube 27 is fixed on the upper jaw body bracket, and a lower jaw body fixing tube 17 is fixed on the lower jaw body bracket. The upper jaw body fixing tube 27 is movably placed in the lower jaw body fixing tube 17 to meet the requirements of positioning and connecting the upper jaw body 2 and the lower jaw body 1. An upper floating spring 28 is provided in the upper jaw body fixing tube 27, and a lower floating spring 18 is provided in the lower jaw body fixing tube 17, which can meet the floating requirements between the upper jaw body and the lower jaw body during operation.

[0071] In addition, a lifting hydraulic cylinder 5 is provided on the upper plate 3. When threading the drill tool 7, the upper and lower positions of the threads may change. The lifting hydraulic cylinder is started to move up and down to achieve the purpose of adjusting the height of the entire clamp body.

[0072] The upper plate 3 is provided with a mud splash prevention mechanism at one side of the borehole. The mud splash prevention mechanism has a mud guard 81 and a rotating shaft 82. Flipping the mud guard of the mud splash prevention mechanism forward can prevent the mud in the drilling tool from splashing out, thereby achieving the purpose of normal operation.

[0073] A multi-way reversing valve 6 is also arranged on the entire caliper body, which can control the operation of multiple hydraulic cylinders and air cylinders to realize intelligent control.

[0074] The main working principle of this lightweight drilling hydraulic tongs is as follows:

[0075] 1. Clamping of the lower clamp body: Use the pressure provided by the universal hydraulic power station to operate the multi-way reversing valve 6, drive the lower clamp clamping hydraulic cylinder 16 and the synchronous pull plate 15 connected and fixed thereto, then pull the two synchronous pull rods 14 and the wedge plate 13 fixedly connected to the two synchronous pull rods, and then drive the two anticline jaw plates 12 to move toward the center of the circle, so that the inner diameters of the left and right anticline jaw plates 12 become smaller, thereby achieving the purpose of clamping the drilling tool.

[0076] 2. Rotation of the upper caliper body: Operate the multi-way reversing valve 6 to make the oil pressure drive the hydraulic motor 32 to rotate clockwise, transmit to the motor gear 24, then to the transition gear 25, and then to the notch gear 23. A fixed gear slide plate 31 is installed on the upper plate 3. The upper plate 3 does not rotate. The notch gear 23 slides and rotates along the gear slide plate 31, driving the upper caliper body to rotate. Two pairs of jaw plates 22 are installed on both sides of the upper caliper body. The jaw plates 22 slide and crawl on the ramp plate 26, so that the left and right pairs of jaw plates 22 are displaced in opposite directions. The inner diameter of the jaw plates 22 gradually decreases, tightly holding the drilling tool 7. The upper caliper body rotates as a whole, driving the drilling tool 7 to rotate. When rotating counterclockwise, you only need to reverse the multi-way reversing valve 6, and the rotation method and the action and steps of clamping the drilling tool are the same. An upper floating spring 28 is provided in the upper caliper body fixed tube 27, and a lower floating spring 18 is provided in the lower caliper body fixed tube 17, which can meet the floating requirements between the upper caliper body 2 and the lower caliper body 1 during operation.

[0077] 3. Punching operation: open the air switch on the multi-way reversing valve 6, push the clutch cylinder 23 and the lower clutch plate 42 connected thereto upward to make them mesh with the upper clutch plate 41. Since the upper clutch plate 41, the motor drive shaft 33, and the motor gear 24 are originally fixed together, operate the multi-way reversing valve 6, and the oil pressure pushes the punching hydraulic cylinder 44, through the clutch crank 46 and the connected lower clutch plate 42, so that the motor gear 24 rotates, and then drives the transition gear 25 and the notch gear 23, transmits the torque to the jaw plate 22 and rotates, so as to achieve the purpose of punching.

[0078] 4. Lifting function: When threading the drill tool 7, the upper and lower positions of the thread may change. The multi-way reversing valve 6 is operated, and the oil pressure pushes the lifting hydraulic cylinder 5 up and down to achieve the purpose of adjusting the height of the entire clamp body.

[0079] 5. Function of the mud splash prevention mechanism: Flipping the mud guard on the mud splash prevention mechanism 7 forward can prevent the mud in the drilling tool 7 from splashing out, thereby achieving the purpose of normal operation.

[0080] This lightweight hydraulic drill tongs can easily realize the process of threading and unthreading of drill tools, as follows:

[0081] 1. When threading on the drill:

[0082] 1. Operate the multi-way reversing valve → clamp the hydraulic cylinder to move → drive the synchronous pull plate and synchronous pull rod → drive the wedge plate to move → prompt the anticline palate plate to move toward the center of the drill tool → the palate plate clamps the lower drill tool joint (the lower clamp body does not rotate);

[0083] 2. Operate the multi-way reversing valve (forward rotation) → rotate the hydraulic motor → drive the motor gear to rotate → drive the transition gear to rotate → drive the notch gear to rotate → drive the upper jaw plate to climb the dislocation clamping drill tool to rotate and pre-tighten the thread → stop the motor (the entire upper jaw rotates forward to obtain a fast speed and a small torque);

[0084] 3. Operate the air valve of the multi-way reversing valve → move the air cylinder upward → make the lower clutch plate mesh with the upper clutch plate → operate the multi-way reversing valve → move the punching hydraulic cylinder → drive the clutch crank to move → drive the motor gear to rotate → drive the transition gear to rotate → drive the notch gear to rotate → drive the upper jaw plate to move → drill tool to rotate (the entire upper clamp body continues to rotate forward to obtain slow speed and large torque to meet the purpose of tightening).

[0085] 2. Drilling tool thread removal process:

[0086] 1. Operate the multi-way reversing valve → clamp the hydraulic cylinder to move → drive the synchronous pull plate and synchronous pull rod → drive the wedge plate to move → prompt the anticline palate plate to move toward the center of the drill tool → the palate plate clamps the lower drill tool joint (the lower clamp body does not rotate);

[0087] 2. Operate the air valve of the multi-way reversing valve → move the air cylinder upward → make the lower clutch plate mesh with the upper clutch plate → operate the multi-way reversing valve (oil enters the hydraulic cylinder B port) → move the punching hydraulic cylinder → drive the clutch crank to move → drive the motor gear to rotate → drive the transition gear to rotate → drive the notch gear to rotate → drive the upper jaw plate to move → drill tool to rotate → loosen the thread (reverse the pliers body, slow speed, large torque, obtain increased torque to meet the purpose of tightening);

[0088] 3. Operate the multi-way reversing valve (reverse) → rotate the hydraulic motor → drive the motor gear to rotate → drive the transition gear to rotate → drive the notch gear to rotate → drive the upper jaw plate to climb the misaligned clamping drill bit to rotate → all threads are removed → stop the motor (the entire upper jaw is reversed to obtain a fast speed and a small torque).

[0089] It can be seen that the portable drilling tool hydraulic pliers solve the technical problems existing in the prior art, are not only practical and durable, easy to operate, but also reduce the manufacturing and maintenance costs.

[0090] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A portable hydraulic drilling tongs, characterized in that: include: A lower caliper body (1), the lower caliper body having a lower caliper body bracket (11) with an opening at the front side, two anticline jaw plates (12) symmetrically arranged on the left and right sides of the opening end of the lower caliper body bracket, and a wedge plate (13) respectively arranged on the outer sides of the two anticline jaw plates (12), the two wedge plates (13) and the two anticline jaw plates (12) being in contact with each other via an inclined surface, a lower caliper body clamping oil cylinder (16) and a synchronous pull plate (15) being arranged on the rear side of the lower caliper body bracket, two synchronous pull rods (14) being arranged on the left and right sides of the lower caliper body bracket, the front ends of the two synchronous pull rods (14) being respectively fixedly connected to the two wedge plates (13), the rear ends of the two synchronous pull rods (14) being respectively fixedly connected to the two ends of the synchronous pull plate (15), the synchronous pull plate (15) being fixedly connected to the piston rod of the lower caliper body clamping oil cylinder (16), a lower caliper body fixing tube (17) being fixed on the lower caliper body bracket, and a lower floating spring (18) being arranged in the lower caliper body fixing tube (17); An upper caliper body (2), the upper caliper body (2) comprising an upper caliper body bracket (21) having a through hole at the center and an opening at the front side, the through hole gradually increasing in radius along the two sides of the opening and then decreasing in radius to form two symmetrical inner grooves, the two inner grooves being provided with a ramp plate (26) and a jaw plate (22) respectively; a notched gear (23) being fixed on the upper side surface of the upper caliper body bracket, the notched gear being transmission-connected to a motor gear (24), two transition gears (25) being meshed with the notched gear (23) being provided on the outer side of the notched gear (23), the two transition gears (25) being meshed with the motor gear (24) at the same time; an upper caliper body fixing tube (27) being fixed on the upper caliper body bracket, the upper caliper body fixing tube (27) being provided with an upper floating spring (28), the upper caliper body fixing tube (27) being movably placed in a lower caliper body fixing tube (17); An upper plate (3) is fixed with a gear slide plate (31) and a hydraulic motor (32); the upper side surface of the notched gear (23) is rotatably connected to the gear slide plate (31); a through hole with a front opening is provided at the center of the gear slide plate, and together with the central through hole of the upper caliper body and the front opening of the lower caliper body, a borehole is formed; the hydraulic motor (32) has an output transmission shaft, namely a motor transmission shaft (33), which extends downward to the upper caliper body, and the motor gear (24) is fixed to the motor transmission shaft. On the driving shaft, an upper clutch plate (41) is fixed on the motor transmission shaft, a lower clutch plate (42) matching the upper clutch plate is correspondingly provided below the upper clutch plate, a clutch cylinder (43) is provided below the lower clutch plate, and a piston rod of the clutch cylinder is fixedly connected to the lower clutch plate (42); a punching hydraulic cylinder (44) is provided below the upper plate (3), and a piston rod of the punching hydraulic cylinder is connected to a clutch crank (46) via a pin shaft (45), and the clutch crank is fixed to the lower clutch plate (42); And a multi-way reversing valve (6) controls the operation of each hydraulic cylinder and air cylinder.

2. The portable drilling hydraulic pliers according to claim 1 are characterized in that: The upper plate is provided with a lifting hydraulic cylinder (5).

3. The portable drilling hydraulic pliers according to claim 1 are characterized in that: The two anticline jaw plates (12) are respectively provided with return springs for enabling them to move toward each other, and the two anticline jaw plates (12) are respectively provided with jaw teeth on the opposite inner side surfaces.

4. The portable drilling hydraulic pliers according to claim 1, characterized in that: The upper plate is located at one side of the borehole and is provided with a mud splash prevention mechanism, the mud splash prevention mechanism comprising a mud guard (81) and a rotating shaft (82).

5. The portable drilling hydraulic pliers according to claim 1, characterized in that: The front opening of the lower clamp body is square.

6. The portable drilling hydraulic pliers according to claim 1, characterized in that: The gear slide plate is a two-petal structure.

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