Reducing reamer for geological exploration

Abstract

The utility model discloses a geological exploration variable-diameter reamer which comprises a drill tail, one end of the drill tail is provided with a connecting spline and a center hole, the other end of the drill tail is provided with internal threads meshed with external threads at the tail of a drill bit, the center of the end face of the other end of the drill bit is provided with a protruding positioning core, and the center of the positioning core is provided with a hole communicated with the center hole of the drill tail. Positioning teeth are arranged at the position close to the hole, cutting teeth are arranged on the inclined face of the positioning core, a side air hole leading to the center hole is formed between every two cutting teeth, secondary cutting teeth are arranged in the concave area close to the root of the positioning core, a plurality of reaming alloy bases are evenly distributed on the edge of the end face of the drill bit, and a ball tooth alloy column is horizontally welded to each base. And a slag discharging opening is formed between every two bases. According to the utility model, multi-step-surface self-positioning is realized, and the problems of difficulty in positioning during broaching, hole deviation, nonstandard holes, inconsistent hole diameters and the like in actual production are solved.

Description

Technical Field

[0001] The utility model relates to a variable-diameter reamer for geological exploration, in particular to a variable-diameter reamer for geological exploration with convenient reaming positioning, controllable hole diameter consistency and high working efficiency, belonging to the technical field of geological drilling tools and equipment. Background Technique

[0002] At present, when drilling holes in geological exploration, in order to improve work efficiency and meet the requirements of actual production technology, it is necessary to first drill a small hole (i.e., a process hole), and then use a drill bit with a diameter larger than this hole diameter to expand the hole diameter. However, in actual operation, due to the inability of the drill bit to be accurately positioned, the hole is prone to deviation, resulting in problems such as non-standard hole eyes and inconsistent hole diameters, causing the drill bit to be stuck and scrapped, affecting work efficiency, bringing a series of problems to actual production, and at the same time increasing production costs. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a variable-diameter reamer for geological exploration, which has the characteristics of convenient reaming positioning, controllable hole diameter consistency and high working efficiency.

[0004] To solve the above technical problem, the technical solution of the utility model is: a variable-diameter reamer for geological exploration, the innovation of which lies in: the variable-diameter reamer for geological exploration includes a drill tail and a drill bit connected to the drill tail. The drill bit and the drill tail are respectively provided with a first central hole and a second central hole located in their cores. The central axes of the first central hole and the second central hole coincide. A protruding conical frustum-shaped positioning core is provided at one end of the drill bit away from the drill tail. Positioning teeth are provided on the top surface of the positioning core, and cutting teeth are provided on the conical surface of the positioning core. The first central hole is communicated with the second central hole, and the first central hole penetrates through to the top surface of the positioning core, and the second central hole penetrates to the bottom of the drill tail.

[0005] Preferably, the positioning core is provided with a positioning hole for placing the positioning teeth, and the positioning hole coincides with the central axis of the first central hole.

[0006] Preferably, the positioning hole is a stepped hole, including a large hole located above and a small hole located below. The positioning teeth are located in the large hole. A connecting sleeve nested in the large hole and the small hole is provided between the first central hole and the positioning teeth. The connecting sleeve is a sleeve-shaped structure with a central opening, and the central axis of the connecting sleeve coincides with the central axis of the first central hole.

[0007] Preferably, the positioning core and the drill bit are of an integral structure.

[0008] Preferably, a plurality of the positioning teeth are evenly distributed on the top surface of the positioning core, and a plurality of the cutting teeth are evenly distributed on the conical surface of the positioning core, and the positioning teeth and the cutting teeth are staggeredly distributed;

[0009] Side air holes penetrating through to the first central hole are arranged on the positioning teeth, and the included angle between the central axis of the side air holes and the central axis of the first central hole is 15-45 degrees; the air outlet at one end of the side air holes far from the first central hole is between two adjacent cutting teeth.

[0010] Preferably, a reaming alloy base is arranged at the edge of the drill bit on the drill bit, and the reaming alloy base and the positioning core form a recessed area on the top surface of the drill bit. A spherical positioning pit is arranged on the reaming alloy base, and a ball tooth alloy column is welded on the spherical positioning pit.

[0011] Preferably, a plurality of the reaming alloy bases are arranged on the drill bit, and the plurality of reaming alloy bases are distributed in a circle around the positioning core; a plurality of secondary cutting teeth located on the top surface of the drill bit are arranged in the recessed area.

[0012] Preferably, the reaming alloy base and the drill bit are of an integral structure; the secondary cutting teeth are evenly distributed in a circle around the positioning core.

[0013] Preferably, a slag discharge port for discharging cutting waste residue is arranged between the reaming alloy base and the adjacent reaming alloy base.

[0014] Preferably, an internal thread matching with the external thread on the drill bit is arranged on the drill tail; a connecting spline for connecting with other components is arranged on the drill tail.

[0015] The advantages of the present utility model are as follows: The present utility model reams a pre-drilled process hole during geological drilling operations, realizes multi-step surface self-positioning, and avoids problems such as difficult positioning during reaming, deviation of the hole, non-standard hole, inconsistent hole diameter, etc. in actual production. The present utility model has a separate design for the drill bit body. When the alloy of the drill bit is worn or scrapped or when the hole diameter needs to be changed due to different drilling sizes, only the size of the drill bit needs to be replaced, and the drill body can be reused. The tail of the drill body of the present utility model is connected to the drill pipe of the drilling rig through a spline connection device, with good sealing effect, stable drilling, and fast penetration speed. It solves problems such as deviation of the hole, non-standard hole, inconsistent hole diameter, etc. in actual production, improves work efficiency, and reduces production costs. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural view of a variable-diameter reamer for geological exploration of the present invention.

[0018] Figure 2 It is a sectional view of a variable-diameter reamer for geological exploration of the present invention.

[0019] Figure 3 It is a top view of a variable-diameter reamer for geological exploration of the present invention.

[0020] Figure 4 It is a schematic structural view of the connecting spline part in a variable-diameter reamer for geological exploration of the present invention.

[0021] In the figure: 1 - drill tail, 2 - drill bit, 3 - first central hole, 4 - second central hole, 5 - positioning core, 6 - positioning teeth, 7 - cutting teeth, 8 - connecting sleeve, 9 - side air holes, 10 - reaming alloy base, 11 - spherical tooth alloy column, 12 - secondary cutting teeth, 13 - slag discharge port, 14 - connecting spline. Specific embodiments

[0022] The variable-diameter reamer for geological exploration of the present invention includes a drill tail 1 and a drill bit 2 connected to the drill tail 1. The drill bit 2 and the drill tail 1 are respectively provided with a first central hole 3 and a second central hole 4 at their cores. The central axes of the first central hole 3 and the second central hole 4 coincide. At one end of the drill bit 2 far from the drill tail 1, a protruding conical positioning core 5 is provided. Positioning teeth 6 are provided on the top surface of the positioning core 5, and cutting teeth 7 are provided on the conical surface of the positioning core 5. The first central hole 3 communicates with the second central hole 4, and the first central hole 3 penetrates to the top surface of the positioning core 5, and the second central hole 4 penetrates to the bottom of the drill tail 1. The present invention reams the pre-drilled process hole during geological drilling operations, realizing multi-step surface self-positioning, and avoiding problems such as difficult positioning during reaming, deviation of the hole, non-standard hole, and inconsistent hole diameter in actual production. The drill bit 2 of the present invention is designed with a separate drill body. When the alloy of the drill bit 2 is worn or scrapped or when the hole size needs to be changed due to different drilling requirements, only the size of the drill bit 2 needs to be replaced, and the drill body can be reused. The drill body tail of the present invention is connected to the drill rod of the drilling rig through a spline connection device, with good sealing effect, stable drilling, and fast penetration speed. It solves problems such as hole deviation, non-standard hole, and inconsistent hole diameter in actual production, improves work efficiency, and reduces production costs.

[0023] A positioning hole for inserting a positioning tooth 6 is provided on the above-mentioned positioning core 5, and the central axis of the positioning hole coincides with the central axis of the first central hole 3. In order to accommodate positioning teeth 6 of different specifications and sizes, the positioning hole is a stepped hole, including a large hole at the upper part and a small hole at the lower part. The positioning tooth 6 is located in the large hole, and a connecting sleeve 8 nested in the large hole and the small hole is arranged between the first central hole 3 and the positioning tooth 6. The connecting sleeve 8 is a sleeve-shaped structure with a central opening, and the central axis of the connecting sleeve 8 coincides with the central axis of the first central hole 3. In order to ensure the connection strength, the positioning core 5 and the drill bit 2 are of an integral structure.

[0024] A number of positioning teeth 6 are evenly distributed on the top surface of the above-mentioned positioning core 5, and a number of cutting teeth 7 are evenly distributed on the conical surface of the positioning core 5. The positioning teeth 6 and the cutting teeth 7 are staggered. A side air hole 9 penetrating through to the first central hole 3 is provided on the positioning tooth 6, and the included angle between the central axis of the side air hole 9 and the central axis of the first central hole 3 is 15 - 45 degrees; the air outlet at one end of the side air hole 9 far from the first central hole 3 is between two adjacent cutting teeth 7.

[0025] In order to realize synchronous drilling of large apertures, a reaming alloy base 10 is provided on the drill bit 2 at the edge of the drill bit 2. The reaming alloy base 10 and the positioning core 5 form a recessed area on the top surface of the drill bit 2. A spherical positioning pit is provided on the reaming alloy base 10, and a spherical tooth alloy column 11 is welded on the spherical positioning pit.

[0026] In order to realize multi-stage cutting, a number of reaming alloy bases 10 are provided on the drill bit 2, and the number of reaming alloy bases 10 are distributed in a circle around the positioning core 5. A number of secondary cutting teeth 12 located on the top surface of the drill bit 2 are provided in the recessed area. The reaming alloy base 10 and the drill bit 2 are of an integral structure; the secondary cutting teeth 12 are evenly distributed in a circle around the positioning core 5. A slag discharge port 13 for discharging cutting waste residue is provided between the reaming alloy base 10 of the present utility model and the adjacent reaming alloy base 10.

[0027] An internal thread matching the external thread on the drill bit 2 is provided on the above-mentioned drill tail 1; a connecting spline 14 for connecting with other components is provided on the drill tail 1, and the connecting spline 14 has 6 - 8 keys. The diameter of the drill bit 2 can be switched between 50 mm and 200 mm according to the drilling requirements, and the diameters of the first central hole 3 and the second central hole 4 are 10 mm - 20 mm. The positioning teeth 6 and the cutting teeth 7 are blade-shaped hard alloys, and their hardness is between f8 - f12.

[0028] It should be understood that the above description is for illustrative purposes and not for limitation. Upon reading the above description, many embodiments and many applications other than the provided examples will be apparent to those skilled in the art. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled. For the sake of completeness, all articles and references, including patent applications and published disclosures, are incorporated herein by reference. Omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the inventor has not considered such subject matter to be a part of the disclosed utility model subject matter.

Claims

1. A variable diameter reamer for geological exploration, characterized in that: The variable diameter reamer for geological exploration includes a drill tail and a drill bit connected to the drill tail, the drill bit and the drill tail are respectively provided with a first center hole and a second center hole located at the core thereof, the central axes of the first center hole and the second center hole coincide with each other, a protruding truncated cone-shaped positioning core is provided on the end of the drill bit away from the drill tail, positioning teeth are provided on the top surface of the positioning core, and cutting teeth are provided on the conical surface of the positioning core; the first center hole is connected with the second center hole, and the first center hole passes through to the top surface of the positioning core, and the second center hole passes through to the bottom of the drill tail.

2. A variable diameter reamer for geological exploration according to claim 1, characterized in that: The positioning core is provided with a positioning hole for the positioning tooth to be placed therein, and the positioning hole coincides with the central axis of the first center hole.

3. A variable diameter reamer for geological exploration according to claim 2, characterized in that: The positioning hole is a stepped hole, including a large hole located at the top and a small hole located at the bottom. The positioning tooth is located in the large hole. A connecting sleeve nested in the large hole and the small hole is provided between the first center hole and the positioning tooth. The connecting sleeve is a sleeve-like structure with a central opening, and the central axis of the connecting sleeve and the first center hole coincides.

4. A variable diameter reamer for geological exploration according to claim 1, characterized in that: The positioning core and the drill bit are an integrated structure.

5. The variable diameter reamer for geological exploration according to claim 1, characterized in that: A plurality of the positioning teeth are evenly distributed on the top surface of the positioning core, and a plurality of the cutting teeth are evenly distributed on the conical surface of the positioning core, and the positioning teeth and the cutting teeth are staggered in distribution; The positioning tooth is provided with a side wind hole which passes through the first center hole, and the angle between the central axis of the side wind hole and the central axis of the first center hole is 15-45 degrees; the air outlet of the side wind hole away from one end of the first center hole is between two adjacent cutting teeth.

6. A geological prospecting variable diameter reamer according to claim 1, characterized in that: The drill bit is provided with a hole-expanding alloy base located at the edge of the drill bit, the hole-expanding alloy base and the positioning core form a recessed area on the top surface of the drill bit, and the hole-expanding alloy base is provided with a spherical positioning pit, and a ball-tooth alloy column is welded on the spherical positioning pit.

7. A variable diameter reamer for geological exploration according to claim 6, characterized in that: The drill bit is provided with a plurality of hole-expanding alloy bases, which are distributed around the positioning core; the recessed area is provided with a plurality of secondary cutting teeth located on the top surface of the drill bit.

8. A variable diameter reamer for geological exploration according to claim 7, characterized in that: The hole-expanding alloy base and the drill bit are an integrated structure; the positioning cores of the secondary cutting tooth ring are evenly distributed around a circle.

9. A geological prospecting variable diameter reamer according to claim 7, characterized in that: A slag discharge port for discharging cutting waste is arranged between the hole-expanding alloy base and the adjacent hole-expanding alloy base.

10. The variable diameter reamer for geological exploration according to claim 1, characterized in that: The drill tail is provided with an internal thread that matches the external thread on the drill bit; and the drill tail is provided with a connecting spline that is connected to other components.

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