Drilling machine drill bit with large-size waste rock cleaning capacity

Abstract

According to the drilling machine drill bit with the large-size waste rock cleaning capacity, the net basket is arranged at the end of the drilling pipe, the cross section area of at least part of the net basket is gradually decreased in the direction away from the drilling teeth, the opening is formed in the axis of the drilling pipe, and under the suction effect of a drilling machine, the waste rock can be cleaned away from the drilling teeth. Regular strip-shaped and block-shaped obstacles in a drill hole are forced to abut against the inner wall of the net basket to rotate and enter the drill barrel through the opening of the net basket, when suction force is insufficient, the obstacles can fall on the net basket, and therefore the obstacles are prevented from falling into the drill hole again, the obstacles which cannot be sucked and captured conventionally can be effectively cleaned out of the drill hole, the drill hole slag suction efficiency is greatly improved, and the drill hole slag suction efficiency is improved. And invalid loss of the drill bit is avoided.

Description

Technical Field

[0001] The utility model relates to a drilling rig drill bit with the ability to clean up relatively large waste rocks, and belongs to the technical field of drilling rig equipment. Background Art

[0002] A drilling rig is a piece of mechanical equipment used for drilling holes underground or underwater. It is usually used in mining, construction, geological exploration, infrastructure construction and other fields. It is widely used in industries such as mining exploration, geological exploration, construction engineering, water conservancy engineering and infrastructure construction.

[0003] In some construction projects, the project surface is covered with thick layers of miscellaneous fill and plain fill, which are mainly composed of large-sized obstacles such as crushed stone, concrete blocks, original old building beams and foundations, and most of them are regular strips and blocks. Such debris is easy to fall into the bottom of the hole during the drilling process. During the construction of existing drilling rigs, obstacles such as large-sized concrete blocks enter the drill pipe, and the obstacles are lifted up by suction. When the suction is insufficient, they will fall back into the borehole and then be repeatedly absorbed. In this process, the bottom sediment, pebbles, and waste slurry that should be absorbed are greatly reduced, the drilling and hole cleaning efficiency is reduced, and the drill bit will also be ineffectively worn. Utility Model Content

[0004] The utility model aims to provide a drill bit for a drilling rig with the ability to clean larger-sized waste rocks, which can prevent regular strip-shaped and block-shaped waste rocks from being repeatedly sucked in, thereby affecting the drilling and hole cleaning efficiency, and reducing the ineffective loss of the drill bit.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a drill bit for a drilling rig capable of cleaning large-sized waste rocks, the drill bit for the drilling rig comprising:

[0006] A drill pipe connected to the drilling rig;

[0007] A drill tooth, arranged at the end of the drill pipe;

[0008] The net basket is arranged in the drill pipe at one end close to the drill bit, and the cross-sectional area of ​​at least part of the net basket decreases in the direction away from the drill bit, and an opening is formed at the axis of the drill pipe.

[0009] Furthermore, the net basket is truncated cone-shaped and is colinear with the axis of the drill pipe.

[0010] Furthermore, the net basket comprises a plurality of support ribs arranged obliquely toward the axis of the drill pipe and a plurality of annular reinforcement ribs arranged at intervals around the support ribs.

[0011] Furthermore, a connecting rib is provided between the supporting rib and the drill pipe, and the connecting rib is located at one end where the supporting rib and the drill pipe are connected.

[0012] Furthermore, the drill teeth include a connecting arm connected to the outside of the drill pipe and a plurality of drill teeth extending in a straight line and arranged on the connecting arm, and the extending direction of the drill teeth crosses the center of the cross section of the drill pipe.

[0013] Furthermore, the connecting arm includes a fixed end fixedly connected to the drill pipe and a drill tooth end for mounting the drill tooth, and the drill tooth end gradually approaches the drill pipe from the center toward both ends.

[0014] Furthermore, the net basket includes a plurality of steel strands spaced apart along the inner wall of the drill pipe, and the steel strands include a connecting section fitted with the inner wall of the drill pipe and a bending section inclined from the end of the connecting section toward the axis of the drill pipe.

[0015] Furthermore, a plurality of drill teeth are arranged at intervals at the end of the drill pipe, the drill teeth are arranged obliquely, and the included angle of the cross section of the drill pipe is an acute angle.

[0016] The beneficial effect of the utility model is that: by arranging a net basket at the end of the drill pipe, and the cross-sectional area of ​​at least part of the net basket decreases in the direction away from the drill tooth, and an opening is formed at the axis of the drill pipe, under the suction of the drilling rig, regular strip-shaped and block-shaped obstacles in the borehole are forced to rotate against the inner wall of the net basket and enter the drill tube through the opening of the net basket; when the suction is insufficient, the obstacles will fall on the net basket, thereby preventing them from falling into the borehole again, and can effectively clean out the obstacles that cannot be captured by conventional means, greatly improving the efficiency of drilling slag suction and avoiding ineffective loss of the drill bit.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a drilling rig drill bit capable of clearing larger-sized waste rocks, as shown in one embodiment of the present application.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle net basket.

[0020] Figure 3 This is a schematic structural diagram of a drilling rig drill bit capable of clearing larger-sized waste rocks, shown in another embodiment of the present application. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In addition, in the present utility model, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] Please refer to Figures 1 to 3 The present application shows a drilling rig drill bit (hereinafter referred to as "drilling rig drill bit") with the ability to clean up larger-sized waste rocks. The drilling rig drill bit includes a drill pipe 1, drill teeth 2 and a net basket 3.

[0027] The drill pipe 1 is connected to the drilling rig, and the drill bit 2 is arranged at the end of the drill pipe 1. The drill pipe 1 is driven to rotate by the drilling rig to drive the drill bit 2 to perform drilling operations. The drilling rig is also provided with a fan, which generates negative pressure in the drill pipe 1 to absorb mud and rock chips in the hole. It only applies to smaller and lighter concrete blocks. This is the existing technology and will not be described in detail here.

[0028] The net basket 3 is arranged at one end of the drill pipe 1 near the drill bit 2, and the cross-sectional area of ​​at least part of the net basket 3 decreases in the direction away from the drill bit 2, and an opening is formed at the axis of the drill pipe 1. In this way, the net basket 3 has two openings, one large and one small, wherein one end of the large opening is connected to the end of the drill pipe 1 near the drill bit 2, and the small opening faces the direction away from the drill bit 2. During the operation of the drill bit of the drilling rig, the small opening is at the top and the large opening is at the bottom. Obstacles will enter the drill pipe 1 along the mesh or small opening of the net basket 3 and move toward the outlet, and stick to the inner wall of the drill pipe 1 under the action of centrifugal force. When the suction force is not enough to suck out larger obstacles, the larger obstacles will fall toward the direction of the drilling hole, and be collected in the drill pipe 1 under the action of the net basket 3, avoiding falling into the drilling hole again, and then cyclically moving between the drilling hole and the drill pipe 1 to affect other obstacles to be sucked, resulting in reduced efficiency in cleaning the drilling hole.

[0029] In this embodiment, the net basket 3 is truncated cone-shaped and is colinear with the axis of the drill pipe 1. The inner wall of the truncated cone-shaped net basket 3 is an arc-shaped conical surface, which is conducive to forcing obstacles such as concrete blocks in the drill hole to rotate against the inner wall of the net basket 3 and enter the drill pipe 1 through the opening on the net basket 3 during construction, which is convenient for collecting obstacles such as concrete blocks. The axis of the net basket 3 is colinear with the axis of the drill pipe 1, so that the distance between the small opening of the net basket 3 and the inner wall of the drill pipe 1 is balanced, reducing obstacles such as concrete blocks from falling into the drill hole from the small opening.

[0030] The net basket 3 includes a plurality of support ribs 31 inclined toward the axis of the drill pipe 1 and a plurality of annular reinforcing ribs 32 arranged at intervals around the support ribs 31. The support ribs 31 are arranged at intervals on the inner wall of the drill pipe 1 and inclined toward the axis of the drill pipe 1 to form an arc-shaped conical surface with an opening at the upper end. A long strip gap is formed between two adjacent support ribs 31. The annular reinforcing ribs 32 are arranged at intervals around the support ribs 31 to divide the long strip gap into a plurality of block gaps to prevent obstacles from falling back into the drill hole and improve the strength of the net basket 3. The support ribs 31 and the annular reinforcing ribs 32 are both steel bars, and the number can be set according to the size of the obstacle, which is not specifically limited here.

[0031] A connecting rib 33 is provided between the support rib 31 and the drill pipe 1, and the connecting rib 33 is located at one end where the support rib 31 is connected to the drill pipe 1. The connecting rib 33 is annular, sandwiched between the bottom end of the support rib 31 and the drill pipe 1, and is fully welded to the inner wall of the drill pipe 1 to improve the connection strength between the net basket 3 and the drill pipe 1, and to prevent the connection between the net basket 3 and the drill pipe 1 from breaking due to an obstacle being too heavy, causing the net basket 3 to fall into the drill hole.

[0032] The drill bit 2 includes a connecting arm connected to the outside of the drill pipe 1 and a plurality of drill teeth 23 extending in a straight line on the connecting arm, and the extending direction of the drill teeth 23 crosses the center of the cross section of the drill pipe 1. The drill bit 2 is provided with a center of the cross section of the drill pipe 1 connected to the outside of the drill pipe 1, and the drill teeth 23 are provided on the connecting wall of the part of the drill bit 2 that crosses the center of the cross section of the drill pipe 1, and a spacing space is formed between the part and the end of the drill pipe 1 to facilitate the absorption of obstacles. Of course, in other embodiments, two drill teeth 2 can also be provided, which are cross-shaped and arranged at the end of the drill pipe 1, or multiple drill teeth 2 can be provided, which can be set according to needs and are not specifically limited here.

[0033] The connecting arm includes a fixed end 21 fixedly connected to the drill pipe 1 and a drill tooth 23 end 22 for mounting the drill tooth 23, and the drill tooth 23 end 22 gradually approaches the drill pipe 1 from the center to both ends. In this way, the end of the drill hole formed by the drill tooth 2 is tapered, which can effectively reduce the difficulty of drilling and improve the drilling efficiency.

[0034] In another embodiment, please refer to Figure 3 The net basket 3 includes a plurality of steel strands 4 arranged at intervals along the inner wall of the drill pipe 1. The steel strands 4 include a connecting section 41 that fits the inner wall of the drill pipe 1 and a bending section 42 that is inclined from the end of the connecting section 41 toward the axis of the drill pipe 1. The connecting section 41 is connected to the inner wall of the drill pipe 1, and the length of the connecting section 41 is at least one-fourth of the diameter of the drill pipe 1 to ensure that the connection strength of the net basket 3 is higher. The bending section 42 is arranged at an angle of 25° to the inner wall of the drill pipe 1 toward the center line of the drill pipe 1. The interval between the steel strands 4 is 2CM. With such an arrangement, when the obstacle rises under the action of suction, it can stretch the steel strands 4 and move upward. However, during the falling process, under the action of suction, its own gravity is not enough to stretch the steel strands 4, so that it is collected above the steel strands 4. The length of the bending section 42 can be set according to demand and is not specifically limited here.

[0035] The end of the drill pipe 1 is provided with a plurality of drill teeth 23 at intervals, the drill teeth 23 are arranged obliquely, and the included angle of the cross section of the drill pipe 1 is an acute angle. The drill teeth 23 are directly installed on the end of the drill pipe 1, and the pipe wall is arranged obliquely at intervals, so as to be a barrel drill suitable for rock breaking by a rotary drilling rig.

[0036] The present application arranges a net basket at the end of the drill pipe, and the cross-sectional area of ​​at least part of the net basket decreases in the direction away from the drill tooth, and an opening is formed at the axis of the drill pipe. Under the suction of the drilling rig, regular strip-shaped and block-shaped obstacles in the borehole are forced to rotate against the inner wall of the net basket and enter the drill tube through the opening of the net basket. When the suction is insufficient, the obstacles will fall on the net basket, thereby preventing them from falling into the borehole again. Obstacles that cannot be captured by conventional methods can be effectively cleaned out of the borehole, thereby greatly improving the efficiency of drilling slag suction and avoiding ineffective loss of the drill bit.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A drill bit capable of cleaning large-sized waste rock, characterized in that: The drilling rig drill bit comprises: A drill pipe connected to the drilling rig; A drill tooth, arranged at the end of the drill pipe; The net basket is arranged in the drill pipe at one end close to the drill bit, and the cross-sectional area of ​​at least part of the net basket decreases in the direction away from the drill bit, and an opening is formed at the axis of the drill pipe.

2. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 1, characterized in that: The net basket is in a truncated cone shape and is colinear with the axis of the drill pipe.

3. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 2, characterized in that: The net basket comprises a plurality of support ribs arranged obliquely toward the axis of the drill pipe and a plurality of annular reinforcing ribs arranged at intervals around the support ribs.

4. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 3, characterized in that: A connecting rib is provided between the supporting rib and the drill pipe, and the connecting rib is located at one end where the supporting rib is connected to the drill pipe.

5. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 4, characterized in that: The drill teeth include a connecting arm connected to the outside of the drill pipe and a plurality of drill teeth extending in a straight line and arranged on the connecting arm, wherein the extending direction of the drill teeth crosses the center of the cross section of the drill pipe.

6. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 5, characterized in that: The connecting arm comprises a fixed end fixedly connected to the drill pipe and a drill tooth end for mounting the drill tooth, and the drill tooth end gradually approaches the drill pipe from the center toward both ends.

7. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 1, characterized in that: The net basket comprises a plurality of steel strands spaced apart along the inner wall of the drill pipe, wherein the steel strands comprise a connecting section fitted to the inner wall of the drill pipe and a bending section inclined from the end of the connecting section toward the axis of the drill pipe.

8. The drill bit for drilling rigs with large-sized waste rock cleaning capability as claimed in claim 7, characterized in that: A plurality of drill teeth are arranged at intervals at the end of the drill pipe, the drill teeth are arranged in an inclined manner, and the included angle of the cross section of the drill pipe is an acute angle.

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