Inclined sleeve structure for assisting horizontal directional drill to penetrate through hard rock

Abstract

The utility model relates to the technical field of drilling construction, in particular to an inclined sleeve structure for assisting a horizontal directional drill to penetrate through hard rock, which comprises a down-the-hole hammer, the down-the-hole hammer comprises a circular main drill bit and an annular auxiliary drill bit sleeved outside the circular main drill bit, and a sealing convex ring is arranged on the annular auxiliary drill bit; the spiral drill rod is coaxially connected with the circular main drill bit; the spiral drill rod and the circular main drill bit are sleeved with the steel sleeve, the annular auxiliary drill bit is located between the circular main drill bit and the steel sleeve, and the sealing convex ring is arranged outside the steel sleeve. The drill rod and the down-the-hole hammer can be conveniently guided through the steel sleeve, the precision and stability of drilling work are improved, meanwhile, air leakage of the pneumatic down-the-hole hammer is conveniently reduced, slurry generated during drilling can be spirally discharged through the steel sleeve in cooperation with the spiral drill rod, unified treatment is facilitated, and the circular main drill bit and the annular auxiliary drill bit are matched with each other. And the annular auxiliary drill bit and the sealing protrusions can improve the sealing performance between the steel sleeve and the round main drill bit, and the working capacity of the down-the-hole hammer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling construction, in particular to an inclined casing structure for assisting horizontal directional drilling to penetrate hard rock. Background Art

[0002] Horizontal directional drilling is generally used in drilling construction. However, in some places with hard geology, such as when drilling through a soil layer with granite, it is difficult to drill with only a horizontal directional drill. Therefore, a pneumatic down-the-hole hammer is combined with a horizontal directional drill. The down-the-hole hammer is installed in front of the drill rod and is used to quickly break the rock layer. However, the impact generated by the down-the-hole hammer is large, which also makes the drilling process unstable.

[0003] In addition, due to environmental protection requirements, even if the mud produced by drilling is non-toxic and harmless, there must be no mud leakage or outflow during the entire construction process, so the mud needs to be centrally treated. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the technical problems in the prior art, the utility model provides an inclined casing structure for assisting horizontal directional drilling to penetrate hard rock.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an inclined casing structure for assisting horizontal directional drilling to pass through hard rock, comprising a down-the-hole hammer, the down-the-hole hammer comprising a circular main drill bit and an annular auxiliary drill bit sleeved outside the circular main drill bit, the annular auxiliary drill bit being provided with a sealing convex ring; a spiral drill rod, the spiral drill rod being coaxially connected to the circular main drill bit; a steel casing for being sleeved on the spiral drill rod and the circular main drill bit, the annular auxiliary drill bit being located between the circular main drill bit and the steel casing, the sealing convex ring being arranged outside the steel casing, and the outer diameter of the sealing convex ring being greater than the inner diameter of the steel casing. The steel casing is used to be sleeved on the drill rod and the down-the-hole hammer; a limit bracket, mounted on the ground, two limit plates being connected to the limit bracket, a limit groove for placing the steel casing being formed between the two limit plates, the limit bracket being further connected to a support member for supporting the steel casing, the side of the support member in contact with the steel casing being arranged inclined.

[0006] This utility model assists horizontal directional drilling through hard rock with an inclined casing structure. The steel casing facilitates guidance of the drill rod and down-the-hole hammer, improving drilling accuracy and stability while also reducing air leakage from the pneumatic down-the-hole hammer. Mud generated during drilling can also be spirally discharged through the steel casing in conjunction with the auger drill rod for unified processing. The circular main drill bit and the annular auxiliary drill bit cooperate to enhance drilling performance. The annular auxiliary drill bit and the sealing protrusion enhance the seal between the steel casing and the circular main drill bit, further improving the working capacity of the down-the-hole hammer. The limit bracket and limit plate facilitate supporting the portion of the steel casing above the ground, improving its stability.

[0007] Furthermore, the support member includes a support seat, a V-shaped groove is provided on the support seat, and the steel sleeve is placed on the V-shaped groove.

[0008] Furthermore, a cylindrical roller is provided on the groove surface of the V-shaped groove, and the cylindrical roller contacts the side wall of the steel pipe sleeve.

[0009] Furthermore, the support member also includes a support plate, the support plate is connected to a bearing seat, the bottom surface of the support seat is connected to a support plate, the support plate is connected to a rotating shaft, and the rotating shaft is inserted into the inner ring of the bearing seat.

[0010] Furthermore, a fixing plate is connected between the two limiting plates, a first screw is threadedly connected to the fixing plate, the first screw is rotatably connected to the support plate, a first guide rod is connected to the bottom of the support plate, and the first guide rod passes through the fixing plate.

[0011] Furthermore, each of the limiting plates is provided with a group of clamping members, and the movable ends of the two groups of clamping members are suitable for contacting the side walls of the steel casing.

[0012] Furthermore, the clamping member includes a second screw, a clamping plate and a second guide rod, the second screw is threadedly connected to the limit plate, the clamping plate is rotatably connected to the second screw, the clamping plate is suitable for contacting the steel casing, one end of the second guide rod is connected to the clamping plate, and the other end passes through the limit plate.

[0013] Furthermore, a handle is provided at one end of the second screw away from the clamping plate.

[0014] Furthermore, an anti-slip block is connected to one end of the second guide rod away from the clamping plate.

[0015] Furthermore, a reinforcing rib is connected between the limiting bracket and the limiting plate.

[0016] The beneficial effects of the present invention are:

[0017] 1. The steel casing facilitates the guidance of the drill pipe and down-the-hole hammer, improving the accuracy and stability of the drilling work and reducing air leakage of the pneumatic down-the-hole hammer. The mud generated by drilling can also be spirally discharged by the steel casing and the auger drill pipe for unified treatment. The circular main drill bit and the annular auxiliary drill bit cooperate with each other to improve the drilling capacity. At the same time, the annular auxiliary drill bit and the sealing protrusion can improve the sealing between the steel casing and the circular main drill bit, further improving the working capacity of the down-the-hole hammer. The limit bracket and limit plate facilitate the support of the part of the steel casing located on the ground, improving the stability of the steel casing.

[0018] 2. The arrangement of the first screw and the support plate facilitates adjustment of the height of the support seat to suit the height of the steel casing;

[0019] 3. The arrangement of two sets of clamping parts makes it easy to clamp the steel casing and to weld the steel casing with other steel casings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of the entire inclined casing structure for assisting horizontal directional drilling through hard rock in the present invention.

[0022] Figure 2 It is a schematic diagram showing the connection between a down-the-hole hammer and a spiral drill rod in the utility model.

[0023] Figure 3 It is a schematic diagram of the limiting bracket in the present utility model.

[0024] In the figure: 1. Steel casing; 2. Limit bracket; 21. Limit plate; 22. Support member; 221. Support plate; 222. Support seat; 2221. V-groove; 2222. Cylindrical roller; 223. First screw; 224. First guide rod; 225. Support plate; 226. Bearing seat; 227. Rotating shaft; 228. Turntable; 23. Fixed plate; 24. Reinforcement rib; 25. Clamping member; 251. Second screw; 252. Clamping plate; 253. Second guide rod; 254. Handle; 255. Anti-slip block; 3. Auger rod; 31. Connecting pipe; 4. Down-the-hole hammer; 41. Circular main drill bit; 42. Annular auxiliary drill bit; 421. Sealing cam; 43. Guide screw rod. DETAILED DESCRIPTION

[0025] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] The utility model discloses an inclined casing structure for assisting horizontal directional drilling to penetrate hard rock.

[0028] Reference Figures 1 to 3 An inclined casing structure for assisting horizontal directional drilling through hard rock includes a down-the-hole hammer 4, an auger rod 3, a steel casing 1, and a limit bracket 2. The down-the-hole hammer 4 includes a circular main drill bit 41, an annular auxiliary drill bit 42 sleeved outside the circular main drill bit 41, and a guide screw rod 43 coaxially fixedly connected to the circular main drill bit 41. The circular main drill bit 41 and the annular auxiliary drill bit 42 are spirally connected so that the circular main drill bit 41 rotates together with the annular auxiliary drill bit 42 when the circular main drill bit 41 is rotated forward, and the annular auxiliary drill bit 42 can be withdrawn from the circular main drill bit 41 when the circular main drill bit 41 is reversed. The auger rod 3 and the guide screw rod 43 are coaxially welded via a connecting pipe 31. The steel casing 1 is sleeved over the auger rod 3 and the circular main drill bit 41, and the annular auxiliary drill bit 42 is located between the circular main drill bit 41 and the steel casing 1. A sealing convex ring 421 is integrally formed on the annular auxiliary drill bit 42 . The sealing convex ring 421 is arranged outside the steel casing 1 , and the outer diameter of the sealing convex ring 421 is larger than the inner diameter of the steel casing 1 , so as to improve the sealing between the steel casing 1 and the circular main drill bit 41 .

[0029] The steel casing 1 facilitates guiding the drill rod 3 and the down-the-hole hammer 4, improving the accuracy and stability of the drilling operation, while also facilitating the reduction of air leakage from the pneumatic down-the-hole hammer 4. The mud generated during drilling can also be spirally discharged by the steel casing 1 in conjunction with the auger rod 3 for unified processing. The limit bracket 2 is mounted on the ground. Two limit plates 21 are welded to the limit bracket 2. A limit groove for placing the steel casing 1 is formed between the two limit plates 21. The limit bracket 2 is also connected to a support member 22 for supporting the steel casing 1. The side of the support member 22 in contact with the steel casing 1 is tilted to accommodate the tilted steel casing 1. The limit bracket 2 and the limit plate 21 facilitate supporting the portion of the steel casing 1 located above the ground, improving the stability of the steel casing 1. Reinforcing ribs 24 are welded between the limit bracket 2 and the limit plate 21 to enhance overall strength. The limit plate 21 can be made of I-beam.

[0030] During drilling, a section of steel casing 1 is first driven into the ground at an angle. As drilling continues, other sections of steel casing 1 are connected to the steel casing 1 by welding to increase the overall length of the steel casing 1.

[0031] Specifically, the support member 22 comprises a support plate 221 and a support seat 222. A fixed plate 23 is welded between the two limit plates 21. A first screw 223 is threadedly connected to the fixed plate 23, and the support plate 221 is rotatably connected to the first screw 223. Two first guide rods 224 are fixedly connected to the bottom of the support plate 221, and both first guide rods 224 pass through the fixed plate 23. A bearing seat 226 is fixedly connected to the support plate 221. Two support plates 225 are fixedly connected to the bottom surface of the support seat 222. A rotating shaft 227 is rotatably connected between the two support plates 225. The rotating shaft 227 is also inserted into the inner ring of the bearing seat 226, allowing the support seat 222 to rotate relative to the support plate 221 along the length of the steel casing 1, thereby facilitating a more precise fit with the inclined steel casing 1. A rotating disk 228 is fixedly connected to the bottom of the first screw 223 to facilitate the rotation of the first screw 223.

[0032] More specifically, the support seat 222 is provided with a V-shaped groove 2221, and the steel casing 1 is placed on the V-shaped groove 2221. A cylindrical roller 2222 is rotatably connected to the groove surface of the V-shaped groove 2221, and the cylindrical roller 2222 is used to contact the side wall of the steel casing to reduce the friction between the steel casing and the surface of the V-shaped groove 2221.

[0033] Each limiting plate 21 is provided with a group of clamping members 25 , and the movable ends of the two groups of clamping members 25 are suitable for contacting the side wall of the steel casing 1 .

[0034] Specifically, the clamping member 25 includes a second screw 251, a clamping plate 252 and two second guide rods 253. The second screw 251 is threadedly connected to the limiting plate 21, and the clamping plate 252 is rotatably connected to the second screw 251. The clamping plate 252 is suitable for contacting the steel casing 1. One end of the two second guide rods 253 is fixedly connected to the clamping plate 252, and the other end passes through the limiting plate 21 and is respectively connected with an anti-slip block 255. The anti-slip block 255 and the second guide rod 253 can be threadedly connected.

[0035] To facilitate the rotation of the second screw rod 251 , a handle 254 is fixedly connected to one end of the second screw rod 251 away from the clamping plate 252 .

[0036] Working Principle: The steel casing 1 facilitates the guidance of the drill rod 3 and down-the-hole hammer 4, improving the accuracy and stability of the drilling operation and reducing air leakage from the pneumatic down-the-hole hammer 4. The mud generated by drilling can also be spirally discharged through the steel casing 1 and the auger 3 for unified treatment. The circular main drill bit 41 and the annular auxiliary drill bit 42 cooperate with each other to improve drilling performance. At the same time, the annular auxiliary drill bit 42 and the sealing protrusion can improve the sealing between the steel casing 1 and the circular main drill bit 41, further improving the working capacity of the down-the-hole hammer 4. The limit bracket 2 and the limit plate 21 facilitate supporting the portion of the steel casing 1 located on the ground, improving the stability of the steel casing 1.

[0037] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An inclined casing structure for assisting horizontal directional drilling through hard rock, characterized in that: include A down-the-hole hammer (4), comprising a circular main drill bit (41) and an annular auxiliary drill bit (42) sleeved outside the circular main drill bit (41), wherein a sealing convex ring (421) is provided on the annular auxiliary drill bit (42); A spiral drill rod (3), wherein the spiral drill rod (3) is coaxially connected to a circular main drill bit (41); A steel casing (1) is sleeved on a spiral drill rod (3) and a circular main drill bit (41), the annular auxiliary drill bit (42) is located between the circular main drill bit (41) and the steel casing (1), the sealing convex ring (421) is arranged outside the steel casing (1), and the outer diameter of the sealing convex ring (421) is larger than the inner diameter of the steel casing (1); A limiting bracket (2) is installed on the ground. Two limiting plates (21) are connected to the limiting bracket (2). A limiting groove for placing the steel casing (1) is formed between the two limiting plates (21). The limiting bracket (2) is also connected to a support member (22) for supporting the steel casing (1). The side of the support member (22) in contact with the steel casing (1) is inclined.

2. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 1, characterized in that: The support member (22) comprises a support seat (222), a V-shaped groove (2221) is provided on the support seat (222), and the steel casing (1) is placed on the V-shaped groove (2221).

3. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 2, characterized in that: A cylindrical roller (2222) is provided on the groove surface of the V-shaped groove (2221), and the cylindrical roller (2222) is in contact with the side wall of the steel pipe sleeve.

4. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 2, characterized in that: The support member (22) further includes a support plate (221), a bearing seat (226) is connected to the support plate (221), a support plate (225) is connected to the bottom surface of the support seat (222), a rotating shaft (227) is connected to the support plate (225), and the rotating shaft (227) is inserted into the inner ring of the bearing seat (226).

5. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 3, characterized in that: A fixing plate (23) is connected between the two limiting plates (21), a first screw rod (223) is threadedly connected to the fixing plate (23), the first screw rod (223) is rotatably connected to the support plate (221), a first guide rod (224) is connected to the bottom of the support plate (221), and the first guide rod (224) passes through the fixing plate (23).

6. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 5, characterized in that: Each of the limiting plates (21) is provided with a group of clamping members (25), and the movable ends of the two groups of clamping members (25) are suitable for contacting the side wall of the steel casing (1).

7. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 6, characterized in that: The clamping member (25) includes a second screw (251), a clamping plate (252) and a second guide rod (253), wherein the second screw (251) is threadedly connected to the limiting plate (21), and the clamping plate (252) is rotationally connected to the second screw (251), and the clamping plate (252) is suitable for contacting the steel casing (1), and one end of the second guide rod (253) is connected to the clamping plate (252), and the other end passes through the limiting plate (21).

8. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 7, characterized in that: A handle (254) is provided at one end of the second screw rod (251) away from the clamping plate (252).

9. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 7, characterized in that: One end of the second guide rod (253) away from the clamping plate (252) is connected to an anti-slip block (255).

10. The inclined casing structure for assisting horizontal directional drilling through hard rock according to claim 1, characterized in that: A reinforcing rib (24) is connected between the limiting bracket (2) and the limiting plate (21).

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