Guide hole gauge protection device and drilling equipment

Abstract

The utility model belongs to the technical field of mining equipment, and discloses a guide hole gauge protection device and drilling equipment, the guide hole gauge protection device comprises a pipe body, the pipe body is provided with a through hole axially penetrating through the pipe body, and the inner side wall of the through hole is in transmission connection with a reducer union through a limiting structure; rock breaking teeth and stabilizing teeth are arranged on the peripheral wall of the pipe body and are respectively arranged at the two ends of the pipe body in the axis direction; in the radial direction of the pipe body, the tooth crest diameter of the rock breaking teeth is equal to the diameter of the roller bit, and the tooth crest diameter of the stabilizing teeth is equal to the diameter of the guide hole. The drilling equipment comprises a reducer union, a roller bit and the guide hole gauge protection device, the roller bit is connected with the reducer union, and the guide hole gauge protection device is arranged on the reducer union in a sleeving mode. According to the guide hole gauge protection device, the rock breaking teeth can participate in rock breaking operation after the roller bit is abraded, and the guide hole efficiency is improved; the stabilizing teeth can be attached to the hole wall of the guide hole, the stabilizing and supporting effects are achieved during guide hole operation, and the quality of the guide hole is ensured.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a guide hole guide and drilling equipment. Background Technology

[0002] When operating a raise drilling rig, the process typically begins with drilling a pilot hole in the upper tunnel using a roller cone drill bit. Once the pilot hole connects to the lower tunnel, the roller cone drill bit is removed, and a large-diameter reamer is connected. The raise drilling rig's feed cylinder and rotary gearbox generate tension and rotational torque to create rock-breaking drilling pressure, forming a large-diameter raise. During pilot hole drilling, the raise drilling rig applies rotational torque and drilling pressure to the roller cone drill bit. The roller cone drill bit impacts, compresses, and scrapes the rock, separating it from the rock mass to form a circular pilot hole.

[0003] The quality of the pilot hole construction in a well drilling rig is crucial for the successful completion of the well. However, roller cone drill bits experience wear during drilling through rock formations, especially in deep wells, ultra-hard rock formations, and abrasion-resistant rock formations, where wear is accelerated. As the roller cone drill bit wears and the drilling depth increases, the pilot hole diameter becomes smaller and smaller, making it impossible to guarantee the consistency of the pilot hole diameter. The gradual reduction in the pilot hole diameter can cause a series of engineering problems, such as abnormal wear of the stabilizer rod, slow drilling speed, difficulty in removing slag, abnormal wear of the cutterhead in subsequent hole enlargement processes, increased cutterhead wobbling, and even breakage of the cutterhead tie rod. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a guide hole diameter maintainer, which can adjust the guide hole diameter after wear of the roller cone drill bit, ensuring the quality of the guide hole.

[0005] This utility model also proposes a drilling device having the above-mentioned guide hole diameter maintainer.

[0006] The guide hole diameter maintainer according to the first aspect of the present invention includes:

[0007] The tube body has a through hole that axially penetrates the tube body, and the inner sidewall of the through hole has a limiting structure;

[0008] Rock-breaking teeth are provided on the outer peripheral wall of the pipe body and at the first end in the axial direction of the pipe body;

[0009] A stabilizing tooth is disposed on the outer peripheral wall of the tube body and at the second end in the axial direction of the tube body;

[0010] Along the radial direction of the tube body, the tip diameter of the rock-breaking tooth is equal to the diameter of the roller cone drill bit, and the tip diameter of the stabilizing tooth is equal to the diameter of the guide hole.

[0011] The guide hole diameter maintainer according to the embodiment of this utility model has at least the following beneficial effects:

[0012] The rock-breaking teeth on the guide hole retainer have a tooth tip diameter equal to the diameter of the roller cone drill bit, allowing them to participate in rock-breaking operations after the roller cone drill bit wears down, thereby reducing wear and improving guide hole efficiency. The stabilizing teeth on the guide hole retainer have a tooth tip diameter equal to the diameter of the guide hole, allowing them to fit against the hole wall and providing stable support during guide hole operations, ensuring guide hole quality. The pipe body is fitted onto the reducer through a through hole, and the pipe body is connected to the reducer through a limiting structure, facilitating the disassembly and replacement of the pipe body.

[0013] According to some embodiments of the present invention, the outer peripheral wall of the tube is provided with a plurality of ribs protruding from its surface, the plurality of ribs being arranged at intervals around the circumference, and a slag discharge groove being formed between adjacent ribs;

[0014] The length extension direction of the rib is parallel to the axial direction of the tube body.

[0015] According to some embodiments of this utility model, the connection between the rib and the tube body is provided with an arc-shaped chamfer.

[0016] According to some embodiments of the present invention, the rock-breaking teeth and / or the stabilizing teeth are mounted on the ribs.

[0017] According to some embodiments of the present invention, the rock-breaking tooth is installed at the first end of the rib along its length, and the stabilizing tooth is installed at the second end of the rib along its length.

[0018] According to some embodiments of the present invention, along the axial direction of the tube body, the rib includes a first mounting surface and a second mounting surface; along the radial direction of the tube body, the first mounting surface is lower than the second mounting surface.

[0019] The rock-breaking tooth is installed on the first mounting surface, and the stabilizing tooth is installed on the second mounting surface.

[0020] According to some embodiments of the present invention, a transition surface is provided between the first mounting surface and the second mounting surface, and the transition surface is inclined.

[0021] According to some embodiments of this utility model, the rock-breaking teeth are wedge-shaped teeth.

[0022] According to some embodiments of this utility model, the stabilizing tooth is an arc-shaped tooth.

[0023] The drilling equipment according to the second aspect of the present invention includes the above-mentioned guide hole diameter maintainer; the drilling equipment of this embodiment has good consistency of guide hole diameter, fast guide hole drilling speed, and good safety; since the drilling equipment includes the above-mentioned guide hole diameter maintainer, it also has at least all the beneficial effects of the guide hole diameter maintainer.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a schematic diagram of the guide hole diameter maintainer according to the first aspect of this application;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 for Figure 1 Assembly diagram of the guide hole diameter maintainer.

[0029] Icon labels:

[0030] Pipe body 100, through hole 110, limiting structure 111, rib 120, arc chamfer 121, first mounting surface 122, second mounting surface 123, transition surface 124, slag discharge groove 130;

[0031] Rock-breaking teeth 200;

[0032] Stabilizing tooth 300;

[0033] 400 reducing adapter, 410 roller cone drill bit. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] The roller cone drill bit 410 of the drilling equipment is usually connected to the drill rod via a reducing coupling 400, see reference. Figure 3 As shown, in this embodiment, the guide hole guide valve is installed on the reducing joint 400. (Refer to...) Figures 1 to 3 The guide hole diameter maintainer of the first aspect of this utility model includes a tube body 100, a through hole 110 axially penetrating the tube body 100, a limiting structure 111 on the inner side wall of the through hole 110, a reducing joint 400 passing through the through hole 110, and the reducing joint 400 being connected to the tube body 100 by a spline drive, which facilitates the disassembly and replacement of the tube body 100; however, other transmission connection methods can also be selected between the tube body 100 and the reducing joint 400 according to the actual situation.

[0039] Reference Figure 1 As shown, in this embodiment, the outer peripheral wall of the pipe body 100 is equipped with rock-breaking teeth 200 and stabilizing teeth 300. The rock-breaking teeth 200 are located at the first end in the axial direction of the pipe body 100, and the stabilizing teeth 300 are located at the second end in the axial direction of the pipe body 100. Along the radial direction of the pipe body 100, the tooth tip diameter of the rock-breaking teeth 200 is equal to the diameter of the roller cone drill bit 410, so that the rock-breaking teeth 200 can participate in rock-breaking operations after the roller cone drill bit 410 wears, thereby reducing the wear of the roller cone drill bit 410 and improving the drilling efficiency. The tooth tip diameter of the stabilizing teeth 300 is equal to the diameter of the drilling hole, so that the stabilizing teeth 300 can fit against the hole wall of the drilling hole, playing a stabilizing support role during drilling operations and ensuring the quality of the drilling hole.

[0040] In an embodiment of this utility model, the outer peripheral wall of the pipe body 100 is provided with a plurality of protruding ribs 120, which are spaced apart around the circumference, and a slag discharge groove 130 is formed between adjacent ribs 120; the length extension direction of the ribs 120 is parallel to the axial direction of the pipe body 100; the number of ribs 120 can be adjusted according to the diameter of the pipe body 100. The function of the slag discharge groove 130 is to provide drainage and slag discharge during the guide hole operation. To facilitate the discharge of wastewater and waste residue, refer to... Figure 2As shown, in this embodiment, the connection between the rib 120 and the pipe body 100 is provided with an arc-shaped chamfer 121. The arc-shaped chamfer 121 can make the cross-section of the slag discharge trough 130 arc-shaped, thereby effectively preventing slag from getting stuck and improving the smoothness of drainage and slag discharge.

[0041] In an embodiment of this utility model, the rock-breaking teeth 200 and / or stabilizing teeth 300 are mounted on the rib 120. Specifically, refer to... Figure 1 , Figure 3 As shown, both the rock-breaking tooth 200 and the stabilizing tooth 300 are installed on the rib 120. The rock-breaking tooth 200 is installed at the first end of the rib 120 along its length, and the stabilizing tooth 300 is installed at the second end of the rib 120 along its length. The first end of the rib 120 along its length is located at the first end of the tube body 100 along its axis, and the second end of the rib 120 along its length is located at the second end of the tube body 100 along its axis. The first end of the rib 120 along its length is close to the roller cone drill bit 410, and the second end of the rib 120 along its length is far away from the roller cone drill bit 410. This ensures that both the rock-breaking tooth 200 and the stabilizing tooth 300 can function effectively.

[0042] In an embodiment of this utility model, along the axial direction of the pipe body 100, the rib 120 includes a first mounting surface 122 and a second mounting surface 123; along the radial direction of the pipe body 100, the first mounting surface 122 is lower than the second mounting surface 123; the rock-breaking tooth 200 is mounted on the first mounting surface 122, and the stabilizing tooth 300 is mounted on the second mounting surface 123. Specifically, refer to... Figure 1 As shown, the tip diameter of the rock-breaking tooth 200 is basically equal to the tip diameter of the stabilizing tooth 300. However, the size of the rock-breaking tooth 200 is larger than the size of the stabilizing tooth 300. Therefore, the first mounting surface 122 is lower than the second mounting surface 123 to ensure that the tip diameter of the rock-breaking tooth 200 is basically equal to the tip diameter of the stabilizing tooth 300.

[0043] Furthermore, the pipe body 100 is provided with a plurality of rock-breaking teeth 200, which are spaced apart along the length direction of the first mounting surface 122; the pipe body 100 is provided with a plurality of stabilizing teeth 300, which are arranged on the second mounting surface 123.

[0044] In this embodiment of the invention, the rock-breaking tooth 200 is a wedge-shaped tooth. The tooth shape and size of the rock-breaking tooth 200 are basically the same as those of the teeth on the roller cone drill bit 410. When the teeth on the roller cone drill bit 410 wear down, the rock-breaking tooth 200 can achieve the same rock-breaking effect as the roller cone drill bit 410. The stabilizing tooth 300 is an arc-shaped tooth. The stabilizing tooth 300 mainly fits against the wall of the guide hole. Setting the stabilizing tooth 300 as arc-shaped can reduce the wear of the stabilizing tooth 300 and extend its service life.

[0045] In an embodiment of this utility model, a transition surface 124 is provided between the first mounting surface 122 and the second mounting surface 123, and the transition surface 124 is inclined. Specifically, refer to... Figure 1 , Figure 2 As shown, the inclined transition surface 124 can reduce the impact of debris on the transition surface 124 and reduce the wear of the transition surface 124, thereby extending the service life of the pipe body 100.

[0046] The drilling equipment according to the second aspect of the present invention includes the aforementioned guide hole diameter maintainer; the drilling equipment of this embodiment has good consistency in the diameter of the guide hole, fast drilling speed, and good safety; since the drilling equipment includes the aforementioned guide hole diameter maintainer, it also has at least all the beneficial effects of the guide hole diameter maintainer, which will not be elaborated here.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0048] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pilot hole guide, characterized in that, The application relates to a drill hole diameter stabilizer, comprising: a pipe body provided with a through hole penetrating through the pipe body in the axial direction, the inner side wall of the through hole being provided with a limiting structure; a rock breaking tooth arranged on the outer peripheral wall of the pipe body and at the first end in the axial direction of the pipe body; a stabilizing tooth arranged on the outer peripheral wall of the pipe body and at the second end in the axial direction of the pipe body; in the radial direction of the pipe body, the tooth top diameter of the rock breaking tooth is equal to the diameter of the roller bit, and the tooth top diameter of the stabilizing tooth is equal to the diameter of the guide hole.

2. The pilot bore gage of claim 1 wherein: the outer peripheral wall of the pipe body is provided with a plurality of ribs protruding from the surface, the plurality of ribs are arranged at intervals around the circumference, and a residue discharging groove is formed between adjacent ribs; the length extension direction of the ribs is parallel to the axial direction of the pipe body.

3. The pilot bore gage of claim 2 wherein: the connection between the ribs and the pipe body is provided with an arc-shaped chamfer.

4. The pilot bore gage of claim 2 wherein: the rock breaking tooth and / or the stabilizing tooth is / are mounted on the ribs.

5. The pilot bore gage of claim 4 wherein: the rock breaking tooth is mounted at the first end in the length direction of the ribs, and the stabilizing tooth is mounted at the second end in the length direction of the ribs.

6. The pilot bore gage of claim 4 wherein: in the axial direction of the pipe body, the ribs comprise a first mounting surface and a second mounting surface; in the radial direction of the pipe body, the first mounting surface is lower than the second mounting surface; the rock breaking tooth is mounted on the first mounting surface, and the stabilizing tooth is mounted on the second mounting surface.

7. The pilot bore gage of claim 6 wherein: the first mounting surface and the second mounting surface have a transition surface therebetween, and the transition surface is arranged in an inclined manner.

8. The pilot bore gage of claim 1 wherein: the rock breaking tooth is a wedge-shaped tooth.

9. The pilot bore gage of claim 1 wherein: the stabilizing tooth is an arc-shaped tooth.

10. A drilling apparatus, characterized by: the application further relates to a drill hole diameter stabilizer, comprising a variable diameter joint, a roller bit and the drill hole diameter stabilizer according to any one of claims 1 to 9, the roller bit is connected with the variable diameter joint, and the drill hole diameter stabilizer is sleeved on the variable diameter joint.

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