Axial clamp holder for coal mine directional drilling
The axial clamp for directional drilling in coal mines addresses hydraulic oil leakage and wear issues by using detachable wear-resistant rings and sealing mechanisms, ensuring stable clamping and easy replacement of worn parts, thus maintaining drill rod stability.
Patent Information
- Application Number
- CN202421025001.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-05-13
AI Technical Summary
The existing axial clamps for directional drilling in coal mines suffer from hydraulic oil leakage, leading to loosening and falling of the drill rod due to wear of the wear-resistant sleeve, which is inconvenient to monitor and replace.
The axial clamp incorporates detachable front clamp wear-resistant rings and sealing mechanisms, including Y-shaped sealing rings and PTFE pads, to reduce wear and prevent oil leakage, with detachable end covers for easy inspection and replacement of worn parts.
The solution effectively reduces wear between the drill pipe and clamp components, prevents oil leakage, and allows for timely replacement of worn parts, ensuring stable clamping and preventing drill rod slippage during drilling.
Smart Images
Figure CN222141188U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an axial clamp, in particular to an axial clamp for directional drilling in coal mines, belonging to the technical field of coal mine drilling. Background Art
[0002] The working principle of directional drilling is to achieve the drill bit drilling along the predetermined trajectory through the synergy of core components and technologies. Directional drilling technology can achieve precise control of the drilling trajectory to meet the specific needs of coal mines. By adjusting the direction and angle of the drill bit or drilling tool, the trajectory of the drilling hole can be accurately controlled to ensure that the drilling hole extends in the predetermined direction. During the directional drilling process, the axial clamp firmly fixes the drill rod in the predetermined position through its clamping mechanism. When the drill bit starts drilling, the clamp will maintain the clamping force on the drill rod to ensure that the drill bit moves in the predetermined direction.
[0003] During the construction process of the existing clamp, after the clamp clamps the drill rod for a long time, the hydraulic oil in the oil cylinder leaks as the clamping time increases, causing the drill rod to loosen and fall out of the cylinder.
[0004] The public technical solution announcement number CN220036618U discloses a clamp assembly for a drilling rig. The slip adopts a structure in which the guide part and the clamping part are integrally connected to ensure stable sliding fit between the slip and the clamp seat, and the wear-resistant sleeve is in contact with the drill rod, which increases the wear resistance of the clamp assembly and reduces the wear of the slip seat after the drill rod rotates on the inside of the perforation.
[0005] The circumferential outer edge of the wear-resistant sleeve is sealed and fixedly connected with the circumferential inner wall of the mounting seat. When the drill pipe moves axially, friction with the wear-resistant sleeve is inevitable, resulting in wear of the wear-resistant sleeve. The wear-resistant sleeve needs to be replaced in time according to the usage of the wear-resistant sleeve. The wear-resistant sleeve is directly installed in the mounting seat, which makes it inconvenient to observe the wear condition of the wear-resistant sleeve. Utility Model Content
[0006] In view of the deficiencies of the prior art, the utility model provides a plastic spraying device which is convenient for adjusting the plastic spraying angle, and solves the problems mentioned in the above background technology.
[0007] The utility model provides an axial clamp for directional drilling in coal mines to solve the problem that the wear-resistant sleeve is directly installed in a mounting seat and the wear condition of the wear-resistant sleeve is inconvenient to observe.
[0008] To achieve the above-mentioned purpose, the utility model achieves the above-mentioned purpose through the following technical solutions: an axial clamp for directional drilling in coal mines, comprising a front clamp cylinder, a front clamp torque transmission ring arranged at the front end of the front clamp cylinder, and a slip installed in the front clamp cylinder, a three-jaw chuck piston is arranged on one side of the slip, and a front clamp wear-resistant ring A is arranged above the three-jaw chuck piston, a chuck piston is arranged on the other side of the slip, a front clamp wear-resistant ring B is arranged below the three-jaw chuck piston, a front clamp end cover A is arranged on the top of the front clamp wear-resistant ring A, and the front clamp wear-resistant ring B is arranged on the top of the front clamp end cover A. The bottom is equipped with a front clamp end cover B, a first Y-shaped sealing ring is provided at the connection between the front clamp wear ring B and the three-jaw chuck piston, and a first polytetrafluoroethylene pad is provided on one side of the first Y-shaped sealing ring, a second Y-shaped sealing ring is provided at the connection between the front clamp wear ring A and the three-jaw chuck piston, and a second polytetrafluoroethylene pad is provided on one side of the second Y-shaped sealing ring, a second wear-resistant ring is provided on the right side of the three-jaw chuck piston, and a first wear-resistant ring is provided on the left side of the three-jaw chuck piston, a front clamp transition ring is provided on the outside of the second polytetrafluoroethylene pad, and a Tecongel ring is installed between the three-jaw chuck piston and the front clamp cylinder.
[0009] Preferably, a third hexagonal bolt is inserted into the interior of the front clamp end cover A, and a second elastic washer is installed between the third hexagonal bolt and the front clamp end cover A.
[0010] Preferably, a first hexagonal bolt is also passed through the interior of the front clamp end cover A, and a first elastic washer is installed between the first hexagonal bolt and the front clamp end cover A.
[0011] Preferably, a third internally threaded cylindrical pin is provided on the surface of the front clamp end cover A.
[0012] Preferably, a second hexagonal head bolt is passed through the interior of the front clamp end cover B, and a first internally threaded cylindrical pin and a second internally threaded cylindrical pin are opened on the surface of the front clamp end cover B, and the first internally threaded cylindrical pin and the second internally threaded cylindrical pin are symmetrical to each other about the vertical center line of the front clamp end cover B.
[0013] Preferably, an O-ring is sleeved outside the front clamp transition ring.
[0014] Preferably, a hexagon socket screw plug is installed on the surface of the front clamp cylinder, and the internal thread of the hexagon socket screw plug is connected with a hexagon socket cylindrical head screw.
[0015] The utility model provides an axial clamp for directional drilling in coal mines, which has the following beneficial effects:
[0016] First, by installing the front clamp wear ring A and the front clamp wear ring B inside the front clamp cylinder, the wear between the drill pipe and the front clamp torque transmission ring after rotating inside the perforation is reduced. At the same time, the front clamp wear ring A and the front clamp wear ring B are equipped with detachable front clamp end covers A and B, which can facilitate the observation of the wear of the front clamp wear ring A and the front clamp wear ring B before use, and timely replace the front clamp wear ring A and the front clamp wear ring B;
[0017] Second: The Y-shaped sealing ring and PTFE pad can improve the sealing effect between the wear-resistant ring and the front clamp cylinder, and the use of O-shaped sealing ring can avoid oil leakage. The hexagon socket head screw is convenient for fixing the top cover to keep the connection clean when not in use. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a structural schematic diagram of another perspective of the utility model;
[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;
[0021] Figure 4 It is a structural schematic diagram of the chuck piston of the utility model.
[0022] In the figure: 1. O-ring; 2. Hexagon socket head screw; 3. First elastic washer; 4. Second elastic washer; 5. First internal thread cylindrical pin; 6. Second internal thread cylindrical pin; 7. First hexagon head bolt; 8. Second hexagon head bolt; 9. Third hexagon head bolt; 10. First wear-resistant ring; 11. Second wear-resistant ring; 12. Hexagon socket screw plug; 13. Tecongel ring; 14. Front clamp end cover A; 15. Front clamp wear ring B; 16, chuck piston; 17, front clamp transition ring; 18, front clamp end cover B; 19, front clamp wear ring A; 20, front clamp torque transfer ring; 21, slip; 22, three-jaw chuck piston; 23, front clamp cylinder; 24, third internal threaded cylindrical pin; 25, first Y-type sealing ring; 26, second Y-type sealing ring; 27, first PTFE pad; 28, second PTFE pad. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0026] Embodiment 1, as Figures 1 to 4 As shown, an axial clamp for directional drilling in coal mines comprises a front clamp cylinder 23, a front clamp torque transmission ring 20 arranged at the front end of the front clamp cylinder 23, and a slip 21 installed in the front clamp cylinder 23, a three-jaw chuck piston 22 is arranged on one side of the slip 21, and a front clamp wear ring A19 is arranged above the three-jaw chuck piston 22, a chuck piston 16 is arranged on the other side of the slip 21, a front clamp wear ring B15 is arranged below the three-jaw chuck piston 22, and the top of the front clamp wear ring A19 is matched A front clamp end cover A14 is provided, a third hexagonal bolt 9 is passed through the interior of the front clamp end cover A14, and a second elastic washer 4 is installed between the third hexagonal bolt 9 and the front clamp end cover A14, a first hexagonal bolt 7 is also passed through the interior of the front clamp end cover A14, and a first elastic washer 3 is installed between the first hexagonal bolt 7 and the front clamp end cover A14, a front clamp end cover B18 is matched with the bottom of the front clamp wear-resistant ring B15, and a second hexagonal bolt 8 is passed through the interior of the front clamp end cover B18.
[0027] By providing the detachable front clamp end cover A14 and the front clamp end cover B18, it is convenient to observe the wear condition of the front clamp wear ring A19 and the front clamp wear ring B15 before use, and replace the front clamp wear ring A19 and the front clamp wear ring B15 in time.
[0028] Embodiment 2. In addition to all the technical features of Embodiment 1, this embodiment also includes: a first Y-shaped sealing ring 25 is provided at the connection between the front clamp wear ring B15 and the three-jaw chuck piston 22, and a first polytetrafluoroethylene pad 27 is provided on one side of the first Y-shaped sealing ring 25; a second Y-shaped sealing ring 26 is provided at the connection between the front clamp wear ring A19 and the three-jaw chuck piston 22, and a second polytetrafluoroethylene pad 28 is provided on one side of the second Y-shaped sealing ring 26; a second wear ring 11 is provided on the right side of the three-jaw chuck piston 22, and a first wear ring 10 is provided on the left side of the three-jaw chuck piston 22; a front clamp transition ring 17 is provided on the outside of the second polytetrafluoroethylene pad 28; and the three-jaw chuck piston 2 2 and the front clamp barrel 23 are installed with a Tecongel ring 13, the surface of the front clamp end cover A14 is provided with a third internal thread cylindrical pin 24, the surface of the front clamp end cover B18 is provided with a first internal thread cylindrical pin 5 and a second internal thread cylindrical pin 6, and the first internal thread cylindrical pin 5 and the second internal thread cylindrical pin 6 are symmetrical with each other about the vertical center line of the front clamp end cover B18, the outer sleeve of the front clamp transition ring 17 is provided with an O-ring 1, the surface of the front clamp barrel 23 is installed with a hexagon socket screw plug 12, and the internal thread of the hexagon socket screw plug 12 is connected with a hexagon socket head screw 2, and the hexagon socket head screw 2 is convenient for fixing the top cover plate to keep the connection clean when not in use.
[0029] When using the axial clamp for directional drilling in coal mines, high-pressure oil enters the front clamp cylinder 23 and pushes the three-jaw chuck piston 22 to move axially. The slip 21 installed on the inner inclined surface of the three-jaw chuck piston 22 applies radial pressure to the axially limited slip 21 through the axial displacement of the chuck piston 16, thereby realizing the clamping function. The axial clamp is installed at the front end of the frame, and its function is to clamp the drill rod to prevent the drill rod from slipping out of the borehole, and cooperate with the chuck to tighten or loosen the connecting thread between the drill rods. The auxiliary pump provides high-pressure oil to the front clamp to provide a power source for the clamping and loosening of the front clamp. When in use, the wear resistance of the front clamp wear ring A19 and the front clamp wear ring B15 can be observed by removing the first hexagonal bolt 7 and the second hexagonal bolt 8 on the front clamp end cover A14 and the front clamp end cover B18, so as to replace the wear ring as needed.
[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. An axial clamp for directional drilling in coal mines, comprising a front clamp barrel (23), a front clamp torque transmission ring (20) arranged at the front end of the front clamp barrel (23), and a slip (21) installed in the front clamp barrel (23), characterized in that: A three-jaw chuck piston (22) is provided on one side of the slip (21), and a front clamp wear ring A (19) is provided above the three-jaw chuck piston (22); a chuck piston (16) is provided on the other side of the slip (21); a front clamp wear ring B (15) is provided below the three-jaw chuck piston (22); a front clamp end cover A (14) is provided on the top of the front clamp wear ring A (19); a front clamp end cover B (18) is provided on the bottom of the front clamp wear ring B (15); a first Y-shaped sealing ring (25) is provided at the connection between the front clamp wear ring B (15) and the three-jaw chuck piston (22); A first polytetrafluoroethylene pad (27) is arranged on one side of the first Y-shaped sealing ring (25); a second Y-shaped sealing ring (26) is arranged at the connection between the front clamp wear ring A (19) and the three-jaw chuck piston (22); a second polytetrafluoroethylene pad (28) is arranged on one side of the second Y-shaped sealing ring (26); a second wear ring (11) is arranged on the right side of the three-jaw chuck piston (22); a first wear ring (10) is arranged on the left side of the three-jaw chuck piston (22); a front clamp transition ring (17) is arranged outside the second polytetrafluoroethylene pad (28); and a Tecongel ring (13) is installed between the three-jaw chuck piston (22) and the front clamp cylinder (23).
2. The axial clamp for directional drilling in coal mines according to claim 1, characterized in that: A third hexagonal bolt (9) is inserted into the interior of the front clamp end cover A (14), and a second elastic washer (4) is installed between the third hexagonal bolt (9) and the front clamp end cover A (14).
3. The axial clamp for directional drilling in coal mines according to claim 1, characterized in that: A first hexagonal bolt (7) is also inserted into the interior of the front clamp end cover A (14), and a first elastic washer (3) is installed between the first hexagonal bolt (7) and the front clamp end cover A (14).
4. The axial clamp for directional drilling in coal mines according to claim 1, characterized in that: A third internally threaded cylindrical pin (24) is provided on the surface of the front clamp end cover A (14).
5. The axial clamp for directional drilling in coal mines according to claim 1, characterized in that: A second hexagonal head bolt (8) is inserted into the interior of the front clamp end cover B (18), and a first internally threaded cylindrical pin (5) and a second internally threaded cylindrical pin (6) are provided on the surface of the front clamp end cover B (18), and the first internally threaded cylindrical pin (5) and the second internally threaded cylindrical pin (6) are symmetrical with respect to the vertical center line of the front clamp end cover B (18).
6. The axial clamp for directional drilling in coal mines according to claim 1, characterized in that: The front clamp transition ring (17) is sleeved externally with an O-type sealing ring (1).
7. The axial clamp for directional drilling in coal mines according to claim 1, characterized in that: A hexagon socket screw plug (12) is installed on the surface of the front clamp cylinder (23), and the internal thread of the hexagon socket screw plug (12) is connected to a hexagon socket cylindrical head screw (2).