A double-swing gripper for a drilling rig and a drill pipe disassembly method

Abstract

The present invention belongs to the technical field of coal mines. It relates to a double-swing gripper for a drilling rig and a method for removing drill pipes. When using the double-swing gripper for the drilling rig to remove drill pipes, the double-swing gripper for the drilling rig includes two clamping units arranged coaxially on a frame. Both of the two clamping units are arranged on a swing device, and the swing device is fixedly arranged on the frame to drive the clamping units to rotate. When removing a drill pipe, the two clamping units respectively clamp the front drill pipe and the rear drill pipe, and the swing device drives the two clamping units to rotate a certain angle in opposite directions, so as to loosen the connection buckle between the front drill pipe and the rear drill pipe. The double-swing gripper for the drilling rig in the present invention adopts two swingable clamping units, which can swing simultaneously to increase the relative rotation angle of the front and rear drill pipes, thereby avoiding the problem of insufficient relative displacement due to slipping, and thus improving the success rate of drill pipe uncoupling.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mines, and relates to a double-swing gripper for a drilling rig and a method for removing drill pipes. Background Art

[0002] An automatic drilling rig is a modern engineering device, mainly used for drilling operations in civil engineering. The automatic drilling rig uses a high-pressure hydraulic system to drive the drill pipe for drilling operations, and has the characteristics of automatic control, high efficiency, vertical and inclined drilling, etc., and can meet the drilling requirements of different geological conditions. Common automatic drilling rigs include rotary drilling rigs, horizontal directional drilling rigs, vertical drilling rigs, etc. In modern engineering construction, the automatic drilling rig has become one of the indispensable important devices.

[0003] The existing automatic drilling rig uses a double gripper to remove drill pipes. The common double gripper is mainly composed of components such as a support base, an oil cylinder, and a slip jaw. Two grippers are fixed side by side on the feed body. The front gripper is provided with two symmetrically arranged clamping oil cylinders. The slip jaw is fixedly installed on the piston rod of the clamping oil cylinder through bolts. The actions of the two slip jaws can form a through hole for the drill pipe to pass through. The structure of the clamping oil cylinder of the rear gripper is the same as that of the front gripper. The difference is that the front gripper also serves as a pipe uncoupler, so a gripper rotation oil cylinder is installed on the base. When tightening the drill pipe, the slip jaw of the front gripper clamps the drill pipe, the slip jaw of the rear gripper loosens the drill pipe to be tightened, and the power head drives the drill pipe to rotate, thereby tightening the drill pipe. When removing the drill pipe, the rear gripper clamps the latter drill pipe to make it fixed, the front gripper clamps the former drill pipe, and the swing oil cylinder drives the swing arm of the front gripper to swing forward and rotate, thereby realizing the uncoupling of the drill pipe. From its working principle, when the front gripper swings and rotates and slips, the relative rotation angle between the front and rear drill pipes cannot reach the expected value, and the reduction of the relative displacement will lead to the failure of uncoupling. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to solve the problem that when the existing gripper slips during drill pipe removal, the relative rotation angle between the drill pipes is insufficient, and to provide a double-swing gripper for a drilling rig and a method for removing drill pipes.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A double-swing gripper for a drilling rig, comprising two clamping units arranged coaxially on a frame. Both of the clamping units are arranged on a swing device, and the swing device is fixedly arranged on the frame to drive the clamping units to rotate; when removing the drill pipe, the two clamping units respectively clamp the front drill pipe and the rear drill pipe, and the swing device drives the two clamping units to rotate a certain angle in opposite directions, thereby loosening the connection buckle between the front drill pipe and the rear drill pipe.

[0007] Further, the swing device includes a swing oil cylinder, a swing body, and a base; the clamping unit is fixedly arranged on the swing body; the swing body is rotatably arranged on the base, and the rotation center of the swing body is coaxial with the clamping center of the clamping unit; the base is fixedly arranged on the frame; one end of the swing oil cylinder is hinged to one side of the swing body, and the other end is hinged to the frame, and the swing body is driven to drive the clamping unit to rotate by the telescopic movement of the swing oil cylinder.

[0008] Further, there are two swing devices, and each clamping unit corresponds to one swing device.

[0009] Further, the clamping unit includes two relatively arranged clamping components, and the clamping components are fixedly arranged on the swing device; the clamping components include slip jaws and clamping oil cylinders; the slip jaws are arranged at the telescopic end of the clamping oil cylinder, and the two slip jaws face each other and clamp the drill pipe under the drive of the clamping oil cylinder.

[0010] A method for disassembling a drill pipe uses the above-mentioned double-swing gripper for a drilling rig to disassemble the drill pipe. When the connection between the rear drill pipe and the front drill pipe is between the two clamping units, the two clamping units respectively clamp the rear drill pipe and the front drill pipe; start the swing device to make the two clamping units rotate relative to each other by a certain angle, so as to loosen the connection buckle between the front drill pipe and the rear drill pipe.

[0011] Further, during disassembly, the two clamping units rotate in opposite directions simultaneously by a certain angle to increase the relative rotation angle between the front drill pipe and the rear drill pipe.

[0012] The beneficial effects of the present invention are as follows:

[0013] The double-swing gripper for a drilling rig in the present invention adopts two swingable clamping units, which can swing simultaneously to increase the relative rotation angle between the front and rear drill pipes, thereby avoiding the problem of insufficient relative displacement due to slipping, and thus improving the success rate of drill pipe uncoupling.

[0014] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. Description of the Drawings

[0015] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, wherein:

[0016] Figure 1 It is a top view of the double-swing gripper for a drilling rig in the present invention.

[0017] Figure 2It is Figure 1 an enlarged view of part A in

[0018] Figure 3 a schematic diagram of the overall two clamping units in the present invention.

[0019] Figure 4 It is Figure 1 the right view of

[0020] Figure 5 a schematic diagram of two clamping components.

[0021] Figure 6 a schematic diagram of the overall double-swing gripper for a drilling rig in the present invention.

[0022] Reference numerals: 1 - frame; 2 - rear drill pipe; 3 - rear clamping unit; 4 - front clamping unit; 5 - front drill pipe; 31 - rear swing oil cylinder; 32 - rear swing body; 33 - rear base; 34 - rear slip; 35 - rear clamping oil cylinder; 41 - front swing oil cylinder; 42 - front swing body; 43 - front base; 44 - front slip; 45 - front clamping oil cylinder. Detailed implementation manners

[0023] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0024] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] Please refer to Figures 1 to 6 , a double-swing gripper for a drilling rig, which includes two coaxially arranged clamping units provided on a frame 1, namely a front clamping unit 4 and a rear clamping unit 3; the front clamping unit 4 is installed on a front swing device; the rear clamping unit 3 is installed on a rear swing device; the front swing device and the rear swing device are arranged side by side on the frame 1. When disassembling the drill pipe, the front clamping unit 4 and the rear clamping unit 3 respectively clamp the front drill pipe 5 and the rear drill pipe 2, and the front swing device and the rear swing device drive the two clamping units to rotate a certain angle in opposite directions, so as to loosen the connection buckle between the front drill pipe 5 and the rear drill pipe 2.

[0027] Among them, the front swing device includes a front swing oil cylinder 41, a front swing body 42, and a front base 43; the front clamping unit 4 is fixedly installed on the front swing body 42; the front swing body 42 is rotatably installed on the front base 43, and the rotation center of the front swing body 42 is coaxial with the clamping center of the front clamping unit 4; the front base 43 is fixedly installed on the frame 1; one end of the front swing oil cylinder 41 is hinged to one side of the front swing body 42, and the other end is hinged to the frame 1. By the telescopic movement of the front swing oil cylinder 41, the front swing body 42 is driven to drive the front clamping unit 4 to rotate.

[0028] The front clamping unit 4 includes two relatively arranged clamping components, and the clamping components are fixedly installed on the front swing device; the clamping components include a front jaw 44 and a front clamping oil cylinder 45; the front jaw 44 is installed at the telescopic end of the front clamping oil cylinder 45, and the two front jaws 44 are opposite to each other and clamp the drill pipe under the drive of the two front clamping oil cylinders 45.

[0029] The rear swing device includes a rear swing oil cylinder 31, a rear swing body 32, and a rear base 33; the rear clamping unit 3 is fixedly installed on the rear swing body 32; the rear swing body 32 is rotatably installed on the rear base 33, and the rotation center of the rear swing body 32 is coaxial with the clamping center of the rear clamping unit 3; the rear base 33 is fixedly installed on the frame 1; one end of the rear swing oil cylinder 31 is hinged to one side of the rear swing body 32, and the other end is hinged to the frame 1. By the telescopic movement of the rear swing oil cylinder 31, the rear swing body 32 is driven to drive the rear clamping unit 3 to rotate.

[0030] The rear clamping unit 3 includes two oppositely arranged clamping components which are fixedly installed on the rear swing device; the clamping components include a rear slip 34 and a rear clamping oil cylinder 35; the rear slip 34 is installed at the telescopic end of the rear clamping oil cylinder 35, and the two rear slips 34 face each other and clamp the drill pipe under the drive of the two rear clamping oil cylinders 35.

[0031] In this embodiment, both the front swing oil cylinder 41 and the rear swing oil cylinder 31 are one and are installed on different sides of the frame 1.

[0032] A drill pipe disassembly method uses the double-swing gripper for a drilling rig in this embodiment to disassemble the drill pipe. When the connection between the rear drill pipe 2 and the front drill pipe 5 is between the two clamping units, the two clamping units respectively clamp the rear drill pipe 2 and the front drill pipe 5; start the two swing devices to rotate the two clamping units in opposite directions simultaneously by a certain angle to increase the relative rotation angle between the front drill pipe 5 and the rear drill pipe 2, thereby loosening the connection buckle between the front drill pipe 5 and the rear drill pipe 2.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A drill pipe disassembly method, characterized in that: The drill pipe is disassembled by using a double-swing gripper for a drill rig. The double-swing gripper for the drill rig includes two clamping units arranged coaxially on a frame. Both of the two clamping units are arranged on a swing device, and the swing device is fixedly arranged on the frame to drive the clamping units to rotate. When disassembling the drill pipe, the two clamping units respectively clamp the front drill pipe and the rear drill pipe, and the swing device drives the two clamping units to rotate a certain angle in opposite directions, so as to loosen the connection buckle between the front drill pipe and the rear drill pipe. The swing device includes a swing oil cylinder, a swing body and a base. The clamping unit is fixedly arranged on the swing body. The swing body is rotatably arranged on the base, and the rotation center of the swing body is coaxial with the clamping center of the clamping unit. The base is fixedly arranged on the frame. One end of the swing oil cylinder is hinged to one side of the swing body, and the other end is hinged to the frame. The swing body is driven to drive the clamping unit to rotate through the telescopic movement of the swing oil cylinder. There are two swing devices, and each clamping unit corresponds to one swing device. The clamping unit includes two clamping components arranged oppositely, and the clamping components are fixedly arranged on the swing device. The clamping component includes a slip and a clamping oil cylinder. The slip is arranged at the telescopic end of the clamping oil cylinder, and the two slips are opposite to each other and clamp the drill pipe under the drive of the clamping oil cylinder. When the connection part between the rear drill pipe and the front drill pipe is between the two clamping units, the two clamping units respectively clamp the rear drill pipe and the front drill pipe. The swing device is started to make the two clamping units rotate a certain angle relatively, so as to loosen the connection buckle between the front drill pipe and the rear drill pipe. During disassembly, the two clamping units rotate a certain angle simultaneously in opposite directions to increase the relative rotation angle between the front drill pipe and the rear drill pipe.

Images