A front clamp for an omni directional drilling rig

Abstract

The utility model discloses a kind of front clamps of all-around directional drilling rig, including front clamp cylinder body, front clamp cylinder body is cylindric structure with cylindrical cavity being arranged in center, and it is provided with cylindrical mounting cavity inside front clamp cylinder body, slip joint is provided with slip piston in mounting cavity, the inner wall of front clamp cylinder body is connected with slip sliding, and slip one side and slip piston sliding abut.This utility model is through setting slip piston and slip, and then by the joint on valve block injects oil into copper sleeve, slip piston is moved by the pressure of oil, and by the mutual cooperation of conical surface, and then slip is moved in radial direction in front clamp cylinder body, constitutes piston type linkage structure, using the incompressibility of oil, pressure can be rapidly and efficiently transmitted to slip piston, this drive mode with oil as medium, compared with traditional mechanical transmission, eliminates transmission gap and energy loss brought by complex mechanical structure.

Description

Technical Field

[0001] This utility model relates to a drilling rig, specifically a front clamp for an all-around directional drilling rig, and belongs to the field of drilling rig technology. Background Technology

[0002] As a core piece of equipment in underground pipeline construction, geological exploration and other projects, the performance of the front clamping device (clamp) of the directional drilling rig directly affects the drilling accuracy, construction efficiency and safety. The main function of the clamp is to clamp and release the drill bit and drill rod, ensuring the stable fixation and flexible switching of the drilling tools during the drilling process. With the increasing demand for automation and high efficiency in engineering construction, the mechanical structure design of the clamp has become a key direction for technological optimization in the industry.

[0003] However, most existing drill rig front clamps have various problems. For example, in a single-pair clamp for a drill rig disclosed in publication number CN119266739A, although it can adapt to the position of the drill rod to ensure safe and stable clamping of the drill rod, the traditional technical solutions in this solution and most current drill rig front clamps mainly include three types: traditional mechanical drive, hydraulic drive, and pneumatic drive clamps. However, regardless of whether it is a mechanical, hydraulic, or pneumatic solution, there are problems of action delay and slow response speed, which cannot meet the cycle efficiency requirements of modern directional drilling rigs for "rapid drilling-rod changing-re-drilling". Especially when adjusting the drill bit angle multiple times in complex formations, the time consumption problem is more prominent. Moreover, factors such as mechanical wear, hydraulic leakage, and air pressure fluctuations lead to unstable clamping force, which can easily cause accidents such as borehole deviation and drill bit damage, increasing construction risks and costs. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a front clamp for an all-around directional drilling rig.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A front clamp for an omnidirectional drilling rig includes a front clamp cylinder body. The front clamp cylinder body has a cylindrical structure with a cylindrical cavity at its center. A cylindrical mounting cavity is provided inside the front clamp cylinder body. A slip piston is slidably connected inside the mounting cavity. Slips are slidably connected to the inner wall of the front clamp cylinder body. One side of the slips slides against the slip piston. Two annular grooves are left on the inner side of the front half of the front clamp cylinder body. A second Y-type seal and a second Glyd ring are installed in sequence in the two annular grooves. A cylinder copper sleeve is installed inside the front end of the front clamp cylinder body.

[0007] As a further embodiment of this utility model: a front cover is provided on the front end face of the front clamping cylinder body, and a front pressure cover is provided on the side of the front cover away from the front clamping cylinder body, and the bottom surface of the front pressure cover is connected to the front surface of the front cover by screws.

[0008] As a further embodiment of this utility model: the slip piston has three conical grooves inside, the slip slides in the conical grooves, and one side of the slip has a conical surface that slides in cooperation with the slip piston. The front end of the slip piston near the front clamping cylinder is configured as a small head structure, and a dustproof sealing ring is installed inside the front end of the small head. A groove is provided on the outside of the small head, and two first glyphs are installed in the groove.

[0009] As a further embodiment of this utility model: the front end cover is provided with a slot, the conical groove of the slip piston is correspondingly set with the slot of the front end cover, and the slip is installed between the slot and the conical groove.

[0010] As a further embodiment of this utility model: a piston cover plate is provided at one end of the slip piston, the piston cover plate is provided with a notch, which is provided one-to-one with the conical groove of the slip piston, a groove is reserved at one end of the inside of the piston cover plate, and a third Glyd ring is installed in the groove. A first Y-type seal is installed on one side of the third Glyd ring, and a copper sleeve is provided at the port of the piston cover plate. An O-ring is provided on the outer wall of the piston cover plate.

[0011] As a further improvement of this utility model: a rear end cover is installed on the rear end face of the front clamping cylinder, and the rear end cover is connected and locked to the front clamping cylinder by screws.

[0012] As a further improvement of this utility model: a valve block is provided on the outer wall of the front clamping cylinder, a safety valve is provided at the front end of the valve block, and two connectors are connected to the side of the valve block.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, a slip piston and slips are provided. Oil is injected into the copper sleeve through a connector on the valve block. The pressure of the oil pushes the slip piston to move, and the interaction of the conical surfaces further pushes the slips radially within the front clamping cylinder, forming a piston-type linkage structure. Utilizing the incompressibility of oil, pressure can be rapidly and efficiently transmitted to the slip piston. This oil-medium driving method, compared to traditional mechanical transmission, eliminates transmission gaps and energy losses caused by complex mechanical structures. It allows the slip piston to respond instantly under pressure, quickly pushing the slips to move. For example, in scenarios involving frequent drill bit or drill pipe changes, this structure... The structure significantly shortens the opening and closing time of the front clamping device, improves overall work efficiency, and reduces project delays caused by slow equipment operation. Based on the hydraulically driven piston linkage structure, it can easily adapt to temperature and humidity changes in different working environments. Whether in high-temperature desert regions or cold polar environments, the physical properties of the hydraulic fluid are relatively stable, and it can still reliably transmit power. Moreover, when the equipment malfunctions, due to its relatively simple structure, maintenance personnel can quickly locate the problematic parts. In addition, the standardized design of valve blocks and joints makes the replacement of parts during maintenance more convenient, reduces maintenance costs and time costs, and ensures the continuous and efficient operation of the drilling rig. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external front elevation structure of the front clamp of the drilling rig according to this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the front clamping cylinder of this utility model;

[0017] Figure 3 This is a schematic diagram of the piston cover plate structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the piston slip structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the front cover structure of this utility model.

[0020] In the diagram: 1. Front clamp cylinder body, 2. Slip piston, 3. Front end cover, 4. Copper sleeve, 5. Piston cover plate, 6. First Y-type seal, 7. Second Y-type seal, 8. First Glyd ring, 9. Second Glyd ring, 10. Third Glyd ring, 11. Dustproof seal, 12. O-ring, 13. Rear end cover, 14. Valve block, 15. Connector, 16. Slip, 17. Front pressure cover, 18. Safety valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1, as Figures 1 to 5 As shown, a front clamp for an all-around directional drilling rig includes a front clamp cylinder 1. The front clamp cylinder 1 has a cylindrical structure with a cylindrical cavity at its center, and a cylindrical mounting cavity is provided inside the front clamp cylinder 1. A slip piston 2 is slidably connected inside the mounting cavity. A slip 16 is slidably connected to the inner wall of the front clamp cylinder 1. One side of the slip 16 slidably abuts against the slip piston 2. Two annular grooves are left on the inner side of the front half of the front clamp cylinder 1. A second Y-type seal 7 and a second Glyd ring 9 are installed in sequence in the two annular grooves. A cylinder copper sleeve is installed inside the front end of the front clamp cylinder 1.

[0023] A front cover 3 is provided on the front end face of the front clamping cylinder 1, and a front pressure cover 17 is provided on the side of the front cover 3 away from the front clamping cylinder 1. The bottom surface of the front pressure cover 17 is connected to the front surface of the front cover 3 by screws.

[0024] The slip piston 2 has three conical grooves inside. The slip 16 slides in the conical grooves, and one side of the slip 16 has a conical surface that slides in the slip piston 2. The front end of the slip piston 2 near the front clamping cylinder 1 is set as a small head structure, and a dustproof sealing ring 11 is installed inside the front end of the small head. A groove is set on the outside of the small head, and two first glyphs 8 are installed in the groove.

[0025] The front cover 3 is provided with a slot, and the conical groove of the slip piston 2 is set in a corresponding manner with the slot of the front cover 3. The slip 16 is installed between the slot and the conical groove. The outer wall of the front clamp cylinder 1 is provided with a valve block 14, and a safety valve 18 is provided at the front end of the valve block 14. Two connectors 15 are connected to the side of the valve block 14.

[0026] In this invention, by setting a slip piston 2 and slips 16, oil is injected into the copper sleeve 4 through the connector 15 on the valve block 14. The pressure of the oil pushes the slip piston 2 to move, and through the mutual cooperation of the conical surfaces, the slips 16 are pushed to move radially within the front clamping cylinder 1, forming a piston-type linkage structure. Utilizing the incompressibility of the oil, pressure can be transmitted to the slip piston 2 quickly and efficiently. This oil-medium driving method, compared with traditional mechanical transmission, eliminates the transmission gaps and energy losses caused by complex mechanical structures, allowing the slip piston 2 to respond instantly under pressure and quickly push the slips 16 to move. For example, in operations where drill bits or drill rods are frequently changed. In this scenario, the structure can significantly shorten the opening and closing time of the front clamping device, improve overall work efficiency, and reduce project delays caused by slow equipment operation. Based on the hydraulically driven piston linkage structure, it can easily adapt to temperature and humidity changes in different working environments. Whether in high-temperature desert areas or cold polar environments, the physical properties of the hydraulic fluid are relatively stable, and it can still reliably transmit power. Moreover, when the equipment malfunctions, due to its relatively simple structure, maintenance personnel can quickly locate the problematic parts. In addition, the standardized design of valve block 14 and connector 15 makes the replacement of parts during maintenance more convenient, reduces maintenance costs and time costs, and ensures the continuous and efficient operation of the drilling rig.

[0027] Example 2, as Figures 1 to 5 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0028] The slip piston 2 has a piston cover plate 5 at one end. The piston cover plate 5 has a notch that corresponds to the conical groove of the slip piston 2. The piston cover plate 5 has a groove at one end inside, and a third Glyd ring 10 is installed in the groove. A first Y-type seal 6 is installed on one side of the third Glyd ring 10. A copper sleeve 4 is installed at the port of the piston cover plate 5. An O-ring 12 is installed on the outer wall of the piston cover plate 5 to prevent oil contamination or wear on parts. The multiple seals work together to significantly improve the sealing performance and reliability of the front clamp of the drilling rig, and prevent insufficient clamping force or equipment failure due to leakage.

[0029] A rear end cover 13 is installed on the rear end face of the front clamping cylinder 1. The rear end cover 13 is connected and locked to the front clamping cylinder 1 by screws. The screw connection method makes the installation and disassembly of the rear end cover 13 and the front clamping cylinder 1 extremely simple.

[0030] When using this drilling rig, first connect the connector 15 to the external oil guide pipe, and inject oil into the valve block 14 through the guide pipe. The oil enters the front clamping cylinder 1 through the copper sleeve 4 and generates pressure to push the slip piston 2 to move in the front clamping cylinder 1. At this time, the conical surfaces of the slip piston 2 and the slip 16 slide against each other, pushing the slip 16 radially along the front clamping cylinder 1 to clamp and lock the drill rod.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A front clamp for an omnidirectional directional drilling rig, comprising a front clamp cylinder (1), characterized in that, The front clamping cylinder (1) is a cylindrical structure with a cylindrical cavity at its center, and a cylindrical mounting cavity is provided inside the front clamping cylinder (1). A slip piston (2) is slidably connected inside the mounting cavity. A slip (16) is slidably connected to the inner wall of the front clamping cylinder (1). One side of the slip (16) slides against the slip piston (2). The front half of the front clamping cylinder (1) has two annular grooves on its inner side. A second Y-type seal (7) and a second glyph (9) are installed in the two annular grooves in sequence. A cylinder copper sleeve is installed inside the front end of the front clamping cylinder (1).

2. The front clamp of an omnidirectional directional drilling rig according to claim 1, characterized in that: The front end face of the front clamping cylinder (1) is provided with a front end cover (3), and a front pressure cover (17) is provided on the side of the front end cover (3) away from the front clamping cylinder (1). The bottom surface of the front pressure cover (17) is connected to the front surface of the front end cover (3) by screws.

3. The front clamp of an omnidirectional directional drilling rig according to claim 2, characterized in that: The slip piston (2) has three conical grooves inside. The slip (16) slides in the conical grooves. One side of the slip (16) has a conical surface that slides in the slip piston (2). The front end of the slip piston (2) near the front clamping cylinder (1) is set as a small head structure. A dustproof sealing ring (11) is installed inside the front end of the small head. A groove is set on the outside of the small head. Two first glyphs (8) are installed in the groove.

4. The front clamp of an omnidirectional directional drilling rig according to claim 3, characterized in that: The front cover (3) is provided with a slot, and the conical groove of the slip piston (2) is set in correspondence with the slot of the front cover (3). The slip (16) is installed between the slot and the conical groove.

5. The front clamp of an omnidirectional drilling rig according to claim 4, characterized in that: The slip piston (2) is provided with a piston cover plate (5) at one end. The piston cover plate (5) is provided with a notch, which corresponds to the conical groove of the slip piston (2). A groove is reserved at one end of the piston cover plate (5), and a third glyph ring (10) is installed in the groove. A first Y-type seal (6) is installed on one side of the third glyph ring (10), and a copper sleeve (4) is provided at the port of the piston cover plate (5). An O-ring seal (12) is provided on the outer wall of the piston cover plate (5).

6. The front clamp of an omnidirectional directional drilling rig according to claim 5, characterized in that: The rear end cover (13) is installed on the rear end face of the front clamping cylinder (1), and the rear end cover (13) is connected and locked to the front clamping cylinder (1) by screws.

7. The front clamp of an omnidirectional drilling rig according to claim 1, characterized in that: A valve block (14) is provided on the outer wall of the front clamping cylinder (1), and a safety valve (18) is provided at the front end of the valve block (14). Two connectors (15) are connected to the side of the valve block (14).

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