A drill rod structure for extracting rock powder in a borehole

Abstract

The utility model discloses a drill rod structure for extracting rock powder in a borehole, belonging to the technical field of drilling equipment; it includes an outer tube structure and an inner tube structure installed in the outer tube structure; the outer tube structure includes: a drill rod, a powder extraction tube, a connecting tube I, and a drill bit; the inner tube structure includes: an injection tube, a connecting tube II, and a water injection tube plug. The utility model sets an outer tube structure and an inner tube structure, and uses a powder extraction tube to complete the collection of rock powder when extracting rock powder in a deep hole, which will not be affected by factors such as formation and depth constraints, pump pressure, etc., and can ensure the rock powder extraction effect when extracting rock powder in a deep hole; the utility model has a simple structure, is easy to install and easy to modify, and is suitable for rock powder collection work at different drilling depths.

Description

Technical Field

[0001] The utility model relates to a drill rod structure, in particular to a drill rod structure for extracting rock powder in a borehole, and belongs to the technical field of drilling equipment. Background Art

[0002] The core extraction rate is a very important indicator in the drilling process, which directly affects the quality of drilling. The ultimate goal of drilling is to extract the core. Through the analysis of the core, we can obtain information such as the changes in stratum lithology and the mechanical indicators of the rock and soil. When encountering complex geological conditions such as rock strata fragmentation, it is very necessary to extract rock powder in the borehole, which can provide reliable data support for subsequent geological exploration, engineering surveys and mining.

[0003] The Chinese utility model patent with publication number: CN216197953U discloses a combined drilling tool structure for fishing rock powder in a hole with a multi-stage powder collecting tube, including a drill rod, a reverse-thread drill bit, a first powder collecting tube, a second powder collecting tube, a core tube and a positive-thread drill bit. This utility model solution collects rock powder by setting a first powder collecting tube and a second powder collecting tube. However, when extracting rock powder from a deep hole, due to the constraints of the formation and depth, and the influence of factors such as pump pressure, when using this utility model to extract rock powder from a deep hole, the rock powder extraction rate is not high and the powder extraction effect is not good.

[0004] Based on the above problems, there is an urgent need for a drill rod structure for extracting rock powder in a borehole, which can ensure the rock powder extraction effect when extracting rock powder in a deep hole. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art mentioned above, the utility model provides a drill rod structure for extracting rock powder in a borehole, which can ensure the rock powder extraction effect when extracting rock powder in a deep hole.

[0006] The technical solution adopted by the utility model is to design a drill rod structure for extracting rock powder in a borehole, which comprises an outer tube structure and an inner tube structure installed in the outer tube structure, and the inner tube structure is coaxially arranged with the outer tube structure.

[0007] The outer tube structure includes: a drill rod, a powder extraction pipe, a drill bit and a connecting pipe I; the outer tube structure is provided with at least one drill rod, such as one drill rod, two drill rods or three drill rods, etc., which can be specifically provided according to the length of the borehole. The drill rods are connected to each other through a connecting pipe I, and the drill rod at the lowest end is connected to the upper end of the powder extraction pipe through the connecting pipe I; the drill bit is installed at the lower end of the powder extraction pipe through the connecting pipe I; a powder inlet hole is provided on the wall of the powder extraction pipe, and a chiseling sawtooth is provided at the lower end of the drill bit.

[0008] The inner tube structure includes: a water injection pipe, a connecting pipe II and a water injection pipe plug; the inner tube structure is provided with at least two water injection pipes, such as two water injection pipes, three water injection pipes or four water injection pipes, which are specifically arranged according to the length of the outer tube structure, and the water injection pipes are connected and communicated with each other through the connecting pipe II, and a water injection pipe plug is installed at the lower end of the water injection pipe located at the lower end; the water injection pipe plug is located in the drill bit and blocks the inner cavity of the drill bit at its position, and the water injection pipe on which the water injection pipe plug is installed passes through the water injection pipe plug.

[0009] The two ends of the outer tube structure respectively extend beyond the two ends of the inner tube structure, so as to facilitate the drilling operation of the outer tube structure.

[0010] Furthermore, the top and bottom outer walls of the drill rod of the present design are respectively provided with threads, the top and bottom outer walls of the powder extraction pipe are also respectively provided with threads, and the top and bottom inner walls of the connecting pipe I are also respectively provided with threads. The drill rod is connected to the powder extraction pipe by threaded connection through the connecting pipe I, and the structural setting is simple, and the connection is reliable and stable.

[0011] Furthermore, a thread is provided on the top outer wall of the drill bit of the present design, and the drill bit is installed at the bottom of the powder extraction pipe in a threaded connection manner through the connecting pipe I, which is convenient for connection and disassembly and assembly.

[0012] Furthermore, the powder extraction pipe of the present design is provided with three powder inlet holes on the pipe wall, and is arranged on the pipe wall at different heights of the powder extraction pipe, specifically at the upper, middle and lower positions of the powder extraction pipe, so as to quickly fill the entire powder extraction pipe to complete the powder extraction operation, and the powder inlet holes are staggered in the height direction of the powder extraction pipe, so as to reduce damage caused by stress concentration and ensure that the powder extraction pipe has good structural strength.

[0013] Furthermore, the powder inlet hole provided on the tube wall of the powder extraction tube of the present design is a triangular hole, and is an inverted triangular hole, which is convenient for powder feeding.

[0014] Furthermore, threads are respectively provided on the outer walls of both ends of the water injection pipe of the present design, and threads are also respectively provided on the top and bottom inner walls of the connecting pipe II. The water injection pipe is threadedly connected to the connecting pipe II, which is convenient for quick disassembly and assembly.

[0015] Furthermore, the water injection pipe plug of the present design is an annular structure, and its inner wall is provided with threads. The water injection pipe plug is installed at the lower end of the water injection pipe by means of threaded connection, and the connection is tight and reliable.

[0016] Furthermore, the water injection pipe plug of the present design is made of elastic material and has an interference fit with the inner cavity of the drill bit. The water injection pipe plug is a rubber water injection pipe plug and can also be made of a metal structure, but in this case, interference fit cannot be used and the sealing performance is relatively poor.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model sets an outer tube structure and an inner tube structure, and when extracting rock powder in a deep hole, a powder collection tube is used to complete the collection of rock powder, which will not be affected by factors such as formation and depth constraints, pump pressure, etc., and can ensure the rock powder extraction effect when extracting rock powder in a deep hole; the utility model has a simple structure, is easy to install and easy to modify, and the length can be flexibly set and adjusted, which is suitable for rock powder collection work at different drilling depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram (cross-sectional view) of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the outer tube structure in the utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the inner tube structure in the utility model;

[0022] Figure 4 A schematic diagram of the structure of the powder taking pipe in the utility model;

[0023] Figure 5 A schematic structural diagram of a water injection pipe in the utility model.

[0024] In the figure, 1-external pipe structure, 101-drill rod, 102-powder extraction pipe, 103-drill bit, 104-connecting pipe I, 105-powder inlet hole, 2-inner pipe structure, 201-water injection pipe, 202-connecting pipe II, 203-water injection pipe plug. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example 1

[0028] like Figure 1-5 As shown, a drill rod structure for extracting rock powder in a borehole comprises: an outer tube structure 1 and an inner tube structure 2 installed in the outer tube structure 1.

[0029] The outer tube structure 1 comprises: a drill rod 101, a powder collecting tube 102, a drill bit 103, and a connecting tube I 104. The outer diameters of the drill rod 101, the powder collecting tube 102, the drill bit 103 and the connecting tube I 104 are consistent.

[0030] The top and bottom outer walls of the drill rod 101 are provided with threads, the top and bottom outer walls of the powder extraction pipe 102 are also provided with threads, and the top and bottom inner walls of the connecting pipe I 104 are also provided with threads. The drill rod 101 is connected to the powder extraction pipe 102 through the connecting pipe I 104. The top outer wall of the drill bit 103 is provided with threads, and the drill bit 103 is installed at the bottom of the powder extraction pipe 102 through the connecting pipe I 104;

[0031] The tube wall of the powder taking tube 102 is provided with a plurality of powder inlet holes 105;

[0032] The inner pipe structure includes: an injection pipe 201, a connecting pipe II 202, and an injection pipe plug 203; a thread is provided on the bottom outer wall of the injection pipe 201, and the injection pipe plug 203 is installed at the bottom of the injection pipe 202 by threaded connection; the outer diameter of the injection pipe plug 203 corresponds to the inner diameter of the drill bit 103.

[0033] It is understandable that drilling research at different depths can be accommodated by setting multiple drill rods 101 according to the drilling depth and connecting multiple drill rods 101 with connecting pipes I 104. Similarly, drilling research at different depths can be accommodated by setting multiple connecting pipes II 202 to connect multiple water injection pipes 201.

[0034] Working process of the utility model: After the structure of the utility model is installed according to the drilling depth and excavated to the specified depth, the rock powder generated by drilling will be mixed with the water flowing out of the water injection pipe 201. As the water continues to flow out of the water injection pipe 201, the mixed liquid of rock powder and water will overflow from the bottom of the drill bit 103 into the borehole due to the obstruction of the water injection pipe plug 203, and will continue to rise along the gap between the outer tube structure 1 and the borehole. When the mixed liquid rises to the position of the powder inlet hole 105 on the powder collection pipe 102, the mixed liquid will flow from the powder inlet hole 105 into the powder collection pipe. At this point, the powder collection pipe 102 completes the collection of rock powder. It can be understood that by setting up multiple powder collection pipes 102, a large amount of rock powder collection work can be achieved.

[0035] The advantages of the solution of the utility model are: the utility model uses the outer tube structure 1 and the inner tube structure 2 to collect rock powder in a deep hole, and adopts a powder collection tube 102 to complete the collection of rock powder. It will not be affected by factors such as formation and depth constraints, pump pressure, etc., and can ensure the rock powder extraction effect when extracting rock powder in a deep hole; the utility model has a simple structure, is easy to install and easy to modify, and is suitable for rock powder collection work at different drilling depths.

[0036] Example 2

[0037] The present application can also cancel the connecting pipe I 104 and the connecting pipe II 202, that is, there is no need to set the connecting pipe I 104 and the connecting pipe II 202. Correspondingly, this structural setting only needs to change the thread structure design of the drill rod 101, the powder extraction pipe 102 and the water injection pipe 201. Specifically, the outer wall of the upper end of the drill rod 101 is provided with an external thread, and the inner wall of the lower end is provided with an internal thread, the outer wall of the upper end of the powder extraction pipe 102 is provided with an external thread, and the inner wall of the lower end is provided with an internal thread, and the inner wall of the upper end of the water injection pipe 201 is provided with an internal thread, and the outer wall of the lower end is provided with an external thread. At this time, threaded connections can be formed between the drill rods 101, between the drill rods 101 and the powder extraction pipe 102, between the powder extraction pipe 102 and the drill bit 103, between the water injection pipes 201, and between the water injection pipe 201 and the water injection pipe plug 203. Specifically:

[0038] Between the drill rods 101: screw the upper end of the drill rod 101 at the lower position into the lower end of the drill rod 101 at the upper position;

[0039] Between the drill rod 101 and the powder extraction pipe 102: screw the upper end of the powder extraction pipe 102 into the lower end of the drill rod 101;

[0040] Between the powder extraction pipe 102 and the drill bit 103: screw the upper end of the drill bit 103 into the lower end of the powder extraction pipe 102;

[0041] Between the water injection pipes 201: screw the lower end of the water injection pipe 201 at the upper position into the upper end of the water injection pipe 201 at the lower position;

[0042] Between the water injection pipe 201 and the water injection pipe plug 203: screw the lower end of the water injection pipe 201 into the water injection pipe plug 203 and pass through the water injection pipe plug 203.

[0043] In addition, in the description of the present utility model, unless otherwise specified, if the terms "multiple", "multiple roots", "multiple groups" are used, they mean two or more than two, and "several", "several roots", "several groups" mean one or more than one. In the description of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, it is only for the convenience of describing the present utility model and simplifying the description, and does 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 utility model. In addition, if the terms "first", "second", "third" are used, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A drill rod structure for extracting rock powder in a borehole, characterized in that: It comprises an outer tube structure and an inner tube structure installed in the outer tube structure, wherein the inner tube structure is coaxially arranged with the outer tube structure; The outer tube structure comprises: a drill rod, a powder extraction pipe, a drill bit and a connecting pipe I; the outer tube structure is provided with at least one drill rod, and the drill rods are connected to each other through a connecting pipe I, and the drill rod at the lowest end is connected to the upper end of the powder extraction pipe through the connecting pipe I; the drill bit is installed at the lower end of the powder extraction pipe through the connecting pipe I; a powder inlet hole is provided on the tube wall of the powder extraction pipe; The inner tube structure includes: a water injection pipe, a connecting pipe II and a water injection pipe plug; the inner tube structure is provided with at least two water injection pipes, and the water injection pipes are connected to each other through the connecting pipe II, and a water injection pipe plug is installed at the lower end of the water injection pipe located at the lower end; the water injection pipe plug is located in the drill bit and blocks the inner cavity of the drill bit at its position, and the water injection pipe on which the water injection pipe plug is installed passes through the water injection pipe plug.

2. A drill rod structure for extracting rock powder in a borehole according to claim 1, characterized in that: The top and bottom outer walls of the drill rod are respectively provided with threads, the top and bottom outer walls of the powder extraction pipe are also respectively provided with threads, and the top and bottom inner walls of the connecting pipe I are also respectively provided with threads. The drill rod is connected to the powder extraction pipe in a threaded manner through the connecting pipe I.

3. A drill rod structure for extracting rock powder in a borehole according to claim 2, characterized in that: The top outer wall of the drill bit is provided with threads, and the drill bit is installed at the bottom of the powder extraction pipe in a threaded connection manner through a connecting pipe I.

4. A drill rod structure for extracting rock powder in a borehole according to claim 3, characterized in that: A plurality of powder inlet holes are arranged on the tube wall of the powder taking tube, and are arranged on the tube wall at different heights of the powder taking tube, and the powder inlet holes are staggered in the height direction of the powder taking tube.

5. A drill rod structure for extracting rock powder in a borehole according to claim 4, characterized in that: The powder inlet hole arranged on the tube wall of the powder taking tube is a triangular hole, and is an inverted triangular hole.

6. A drill rod structure for extracting rock powder in a borehole according to claim 5, characterized in that: The outer walls of both ends of the water injection pipe are respectively provided with threads, and the top and bottom inner walls of the connecting pipe II are also respectively provided with threads, and the water injection pipe is threadedly connected with the connecting pipe II.

7. A drill rod structure for extracting rock powder in a borehole according to claim 6, characterized in that: The water injection pipe plug is an annular structure, the inner wall of which is provided with threads, and the water injection pipe plug is installed at the lower end of the water injection pipe by means of threaded connection.

8. The drill rod structure for extracting rock powder in a borehole according to claim 7, characterized in that: The water injection pipe plug is made of elastic material and has an interference fit with the inner cavity of the drill bit. The water injection pipe plug is a rubber water injection pipe plug.

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