Geothermal survey drill with filling function

Abstract

A geothermal survey drill with a filling function comprises a drill bit, a drill sleeve and a drill rod, the drill rod is located in the drill sleeve and connected in a sliding mode, the lower end of the drill sleeve is fixedly connected with the drill bit, a filling hole is formed in the drill rod in the vertical direction, and the drill rod and the drill sleeve enable the lower end of the filling hole to be opened or closed through a limiting mechanism. According to the geothermal survey drill with the filling function, when the drill bit moves downwards, the lower end face of the drill rod is attached to the upper surface of the drill bit to avoid blockage, and when the drill bit moves upwards, the limiting groove located below the lower end face of the drill rod communicates with the hole and the filling hole to form a filling channel; the hole is filled with the filler through the filling hole and the filling channel, so that the purposes that the drill bit is prevented from being blocked in the process of drilling, namely moving downwards, and filling is facilitated in the process of taking out the drill bit, namely moving upwards are achieved, efficiency can be improved, and operation is easy.

Description

Technical Field

[0001] The invention relates to the technical field of geothermal exploration equipment, and in particular to a geothermal exploration drill with a filling function. Background Art

[0002] Geothermal survey refers to the exploration of the underground to find viable active geothermal areas, with the goal of building a geothermal power plant, where thermal fluids drive turbines to generate electricity. Geothermal survey requires drilling to survey the heat underground. The traditional way is to use a large drilling rig to dig and drill. After drilling, the larger and ineffective holes need to be filled. When filling, it is generally necessary to remove the drill bit and use a filling tool to fill. The process is cumbersome and inefficient. Some also set connection holes on the survey drill equipment to connect to the ground equipment to achieve filling. At present, this type of connection hole is easy to mix with soil and other materials during the drilling process of the drill bit, causing blockage, affecting the filling work. Summary of the invention

[0003] The purpose of the present invention is to provide a geothermal exploration drill with a filling function, so that the drill bit can avoid being blocked during the drilling process, reduce process operations and improve filling efficiency.

[0004] To achieve the above-mentioned purpose, the following technical solution is adopted: a geothermal exploration drill with a filling function, comprising a drill bit, a drill sleeve and a drill rod, the drill rod is slidably connected in the drill sleeve, the lower end of the drill sleeve is fixedly connected to the drill bit, a filling hole is arranged in the drill rod along the vertical direction, and the drill rod and the drill sleeve are limited by a limiting mechanism to open or close the lower end of the filling hole.

[0005] Preferably, the limiting mechanism includes a limiting groove and a connecting block, the limiting grooves are evenly distributed on the side wall of the lower end of the drill sleeve and are arranged along the vertical direction, the connecting blocks are evenly distributed on the outer wall of the lower end of the drill rod, and the connecting blocks are respectively located in the limiting grooves and slidably cooperate with them.

[0006] Preferably, it also includes a blocking mechanism, the lower end of which is connected to the connecting block, the inner side of the upper end of the blocking mechanism is in contact with the outer wall of the drill sleeve, and the limiting groove is in a closed state when the lower end of the filling hole is in contact with the upper surface of the drill bit.

[0007] Preferably, the blocking mechanism is a plurality of baffle plates or annular plates.

[0008] Preferably, the upper surface of the drill bit has a first flow-guiding surface protruding upward, and the lower end surfaces of the drill rod and the connecting block have concave surfaces matching the first flow-guiding surface.

[0009] Preferably, the drill body of the drill bit has a second flow-guiding surface, and the second flow-guiding surface transitions to the first flow-guiding surface in a circular arc.

[0010] Preferably, the second guide surface is provided with grooves along an inclined direction.

[0011] Beneficial effects achieved by the present invention: The present invention provides a geothermal exploration drill with a filling function. During drilling, the bottom of the drill bit is against the drilled object through a limiting mechanism and a filling hole. The drill rod is driven to rotate and pressurized by a drilling rig so that the lower end surface of the drill rod fits against the upper surface of the drill bit to avoid blockage. When the drill bit is taken out, the drill rod is moved upward by the drilling rig, and the connecting block moves upward in the limiting groove. At this time, the limiting grooves below the lower end surface of the drill rod are respectively connected with the hole and the filling hole to form a filling channel. When filling is required, the filler is filled into the hole through the filling hole and the filling channel, thereby achieving the purpose of preventing the drill bit from being blocked during the drilling process, i.e., moving downward, and facilitating filling during the removal of the drill bit, i.e., moving upward, while improving efficiency and simplifying operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the present invention.

[0014] Figure 3 for Figure 2 Schematic diagram of the AA cross-section structure.

[0015] Figure 4 It is a schematic diagram of the structure of the first guide surface of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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, and therefore cannot be understood as a limitation on the present invention.

[0018] See attached Figure 1-4A geothermal exploration drill with a filling function comprises a drill bit 1, a drill sleeve 2 and a drill rod 3. The drill rod 3 is slidably connected in the drill sleeve 2, and the lower end of the drill sleeve 2 is fixedly connected to the drill bit 1. A filling hole 4 is arranged in the drill rod 3 along the vertical direction. The drill rod 3 and the drill sleeve 2 open or close the lower end of the filling hole 4 through a limiting mechanism. During drilling, the bottom of the drill bit 1 is pressed against the drilled object, and the drill rod 3 is driven to rotate and pressurize by the drilling rig so that the lower end surface of the drill rod 3 is attached to the upper surface of the drill bit 1 to avoid blockage. When the drill bit 1 is taken out, the drill rod 3 is moved upward by the drilling rig. At this time, the lower end surface of the drill rod 3 and the upper surface of the drill bit 1 form a filling channel. When filling is required, the filler is filled into the hole through the filling hole 4 and the filling channel.

[0019] The cam 6 is provided with a plurality of holes 5 for holding the drill bit 1 in place and a plurality of holes 6 are provided for holding the drill bit 1 in place.

[0020] In this embodiment, in order to prevent sand, gravel and soil from entering the limiting groove and affecting the movement of the connecting block 6, i.e., the drill rod 3, a blocking mechanism 7 is also included. The lower end of the blocking mechanism 7 is connected to the connecting block 6, and the inner side of the upper end of the blocking mechanism 7 is in contact with the outer wall of the drill sleeve 2. When the lower end of the filling hole 4 is in contact with the upper surface of the drill bit 1, the limiting groove 5 is in a closed state, thereby ensuring that the size of the filling channel is not affected and improving the backfilling efficiency.

[0021] Wherein, the blocking mechanism 7 is a plurality of baffles or annular sheets. When the blocking mechanism 7 is a plurality of baffles, they are respectively connected to the corresponding connecting blocks 6, and the baffles can cover the limiting groove 5 and be higher than a predetermined height; when the blocking mechanism 7 is annular sheets, the plurality of connecting blocks 6 are connected together under the annular sheets.

[0022] In this embodiment, in order to allow the backfill to enter the bottom of the hole, the upper surface of the drill bit 1 has an upwardly protruding first guide surface 8, and the lower end surfaces of the drill rod 3 and the connecting block 6 have concave surfaces that cooperate with the first guide surface 8.

[0023] Furthermore, the drill body of the drill bit 1 has a second guide surface 9, which transitions with the first guide surface 8 in a circular arc. The second guide surface 9 is provided with a groove (not shown in the figure) along an inclined direction, so that the backfill can enter the bottom of the hole, avoiding or reducing the obstruction of the backfill by the drill bit 1; wherein the backfill is concrete for filling the hole, and can also be cooling water for cooling the drill bit.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A geothermal exploration drill with a filling function, comprising a drill bit (1), a drill sleeve (2) and a drill rod (3), characterized in that: The drill rod (3) is slidably connected inside the drill sleeve (2); the lower end of the drill sleeve (2) is fixedly connected to the drill bit (1); a filling hole (4) is provided in the drill rod (3) along the vertical direction; the drill rod (3) and the drill sleeve (2) are connected via a limiting mechanism so that the lower end of the filling hole (4) is opened or closed.

2. A geothermal exploration drill with filling function according to claim 1, characterized in that: The limiting mechanism comprises limiting grooves (5) and connecting blocks (6); the limiting grooves (5) are evenly distributed on the side wall of the lower end of the drill sleeve (2) and are arranged in the vertical direction; the connecting blocks (6) are evenly distributed on the outer wall of the lower end of the drill rod (3); the connecting blocks (6) are respectively located in the limiting grooves (5) and slidably cooperate with the limiting grooves (5).

3. The geothermal exploration drill with filling function according to claim 2, characterized in that: It also comprises a blocking mechanism (7), the lower end of the blocking mechanism (7) is connected to the connecting block (6), the inner side of the upper end of the blocking mechanism (7) is in contact with the outer wall of the drill sleeve (2), and when the lower end of the filling hole (4) is in contact with the upper surface of the drill bit (1), the limiting groove (5) is in a closed state.

4. The geothermal exploration drill with filling function according to claim 3, characterized in that: The blocking mechanism (7) is a plurality of baffle plates or annular plates.

5. The geothermal exploration drill with filling function according to claim 2, characterized in that: The upper surface of the drill bit (1) has a first flow guide surface (8) protruding upward, and the lower end surfaces of the drill rod (3) and the connecting block (6) have concave surfaces matching the first flow guide surface (8).

6. The geothermal exploration drill with filling function according to claim 1, characterized in that: The drill body of the drill bit (1) has a second flow-guiding surface (9), and the second flow-guiding surface (9) transitions to the first flow-guiding surface (8) in an arc.

7. The geothermal exploration drill with filling function according to claim 6, characterized in that: The second guide surface (9) is provided with grooves along an inclined direction.

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