Small-caliber spiral advanced drilling tool and drilling equipment

Abstract

The utility model relates to the technical field of drilling exploration, in particular to a small-caliber spiral advanced drilling tool and drilling equipment. The small-caliber spiral advanced drilling tool comprises an outer pipe, a connecting block, an inner pipe and a drilling bit. A reamer bit is arranged at the end of the outer wall of the outer pipe. The connecting block is located in the outer pipe and detachably connected with the outer pipe. The inner pipe is located in the outer pipe, the inner pipe and the outer pipe are coaxially arranged, and the inner pipe is connected with the connecting block; the drilling bit is located on one side of the end of the outer pipe and connected with the connecting block through a screw rod, the screw rod is located in the inner pipe, and a gap is formed between the drilling bit and a port of the outer pipe. The drilling coring device is convenient to operate, and the construction efficiency in the drilling coring process can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of drilling and exploration, and in particular to a small-diameter spiral advance drill and drilling equipment. Background Art

[0002] Drilling exploration is a method commonly used in geological exploration and mining projects. It uses a drill or other tool to drill underground to obtain the physical properties and structural characteristics of underground rock formations in order to understand underground geological conditions, mineral resource distribution, groundwater and other information. Drilling exploration usually includes the following steps: Determine the exploration target and area: determine the area to be explored, the purpose of exploration, the depth and other information; Select the appropriate exploration method: According to the exploration target and geological conditions, select the appropriate drilling method, such as drill rod drilling, core drilling, rotary drilling, etc.; Perform drilling operations: Drill holes underground with drilling equipment to obtain samples or data of underground rock formations; Core collection and analysis: When using the core drilling method, core samples of underground rock formations can be collected for analysis and research to obtain geological information; Data processing and interpretation: Process and interpret the collected data to analyze underground geological structures, mineral resource enrichment and other information; Prepare exploration reports: According to the drilling results and analysis, prepare corresponding exploration reports and provide them to relevant departments or units for reference and decision-making.

[0003] In the process of drilling operations, when drilling in sand layers, pulverized coal layers, and mud, traditional drilling tools were used in the past. Coring required the entire drill to be lifted, which was time-consuming and the construction efficiency needed to be improved. Utility Model Content

[0004] The present application provides a small-diameter spiral advance drill and drilling equipment. The drill can be disassembled underground, and construction personnel can extract the core individually without lifting the drill as a whole, thereby solving the problem of time-consuming coring process in the past.

[0005] This application is implemented through the following technical solutions:

[0006] In a first aspect, the present application provides a small-caliber spiral advance drilling tool, comprising:

[0007] An outer tube, wherein an outer wall end of the outer tube is provided with a reaming drill bit;

[0008] A connecting block, the connecting block is located inside the outer tube and is detachably connected to the outer tube;

[0009] An inner tube, the inner tube is located inside the outer tube and is coaxially arranged with the outer tube, and the inner tube is connected to the connecting block;

[0010] A drilling bit is located at one side of the end of the outer tube, and the drilling bit is connected to the connecting block through a screw, wherein the screw is located in the inner tube, and there is a gap between the drilling bit and the port of the outer tube.

[0011] The small-diameter spiral advance drilling tool provided by the present application can realize hole drilling through the drilling bit, and expand the hole diameter through the reaming drill bit on the outer tube to form a borehole; the core formed by drilling with the drilling bit is brought into the outer tube, and the core is brought into the inner tube through the screw between the drilling bit and the connecting block to realize temporary storage of the core. After the core sampling is completed, the connecting block and the outer tube are separated from each other, and the connecting block and the inner tube are taken out of the borehole together to realize the acquisition of the core, and the replacement operation of the drilling bit is realized, and there is no need to perform the overall drill lifting operation of the drilling tool, which takes relatively short time and relatively improves the construction efficiency.

[0012] In some optional embodiments, a reamer is disposed on the outer wall of the outer tube.

[0013] The small-diameter spiral advance drilling tool provided in this application sets the reamer on the outer wall of the outer tube, which makes the entire drilling process more efficient and stable. The reamer on the outer wall can effectively expand the borehole diameter to meet specific engineering needs; at the same time, setting the reamer on the outer wall of the outer tube can reduce the resistance during the drilling process, making it easier for the drill bit to pass through the formation, thereby improving the drilling efficiency; and the setting of the reamer can enhance the stability of the drilling structure and avoid deformation or collapse of the drilling hole.

[0014] In some optional embodiments, the number of the reamers is configured to be multiple and arranged at intervals along the axial direction of the outer tube.

[0015] The small-diameter spiral advance drilling tool provided in the present application is provided with multiple reamers, which is conducive to stably expanding the borehole diameter, thereby further improving the stability of the borehole structure and further reducing the risk of deformation or collapse of the borehole.

[0016] In some optional embodiments, a salvage cap is provided on the connection block.

[0017] The small-diameter spiral advance drilling tool provided in the present application, after setting a salvage cap on the connecting block, the construction personnel can operate the salvage tool in the well to cooperate with the salvage cap to separate the connecting block from the outer pipe, which is convenient to operate and implement, and is conducive to improving construction efficiency.

[0018] In some optional embodiments, a spring card is provided on the connection block, and a snap-fit ​​groove adapted to the spring card is provided on the inner wall of the outer tube.

[0019] The small-diameter spiral advance drilling tool provided in the present application utilizes a spring card and a clamping groove to form a detachable connection between an outer tube and a connecting block. The operation is simple. The connecting block and the outer tube can be separated by applying an external force to the connecting block to elastically deform the spring card. The disassembly efficiency is relatively high. At the same time, in the process of matching the connecting block and the outer tube, the connection between the connecting block and the outer tube can be achieved by applying an external force to the connecting block so that the spring card elastically deforms and enters the clamping groove. The operation is simple, the requirements for disassembly tools are relatively low, and it is beneficial to improve the construction efficiency.

[0020] In some optional embodiments, the spring card is configured as an annular spring piece, wherein the snap-in groove is constructed as an annular groove.

[0021] The small-diameter spiral advance drilling tool provided by the present application has a spring card configured as an annular spring piece and a clamping groove constructed as an annular groove. The cooperation between the spring card and the clamping groove is more stable, which can resist increased vibration and avoid the situation where the connecting block and the outer tube separate from each other during the drilling process, thereby ensuring the stability of the drilling process.

[0022] In some optional embodiments, the screw and the inner tube are coaxially arranged.

[0023] The small-diameter spiral advance drilling tool provided in the present application, after the core is brought into the inner tube, since the screw and the inner tube are coaxially arranged, the screw is subjected to balanced force in the circumferential direction, which can ensure the structural stability of the screw and the connection stability between the screw and the connecting block.

[0024] In some optional embodiments, the outer tube includes a first section and a second section, and the inner diameter of the first section is smaller than the inner diameter of the second section;

[0025] Wherein, the reaming drill bit is configured in the first section.

[0026] The small-diameter spiral advance drill provided in the present application has an inner diameter of the first section that is smaller than the inner diameter of the second section, that is, the wall thickness of the first section is greater than the wall thickness of the second section, so that the structural strength of the first section is greater than the structural strength of the second section, and can withstand the pressure from the reaming drill bit to ensure the overall structural stability of the drill.

[0027] In some optional embodiments, the end surface of the first segment close to the second segment is constructed as a wedge surface structure.

[0028] The small-diameter spiral advance drill provided in the present application has a first section and a second section transitioned by a wedge surface structure, so that the structural strength between the two is better, the overall structural stability of the drill is guaranteed, and it is conducive to the stable drilling operation.

[0029] In a second aspect, the present application provides a drilling device, comprising any one of the above-mentioned small-diameter spiral advance drilling tools.

[0030] Compared with the prior art, this application has the following advantages and beneficial effects:

[0031] The small-diameter spiral advance drill and drilling equipment provided by the present application can realize hole drilling through the drilling bit, and expand the hole diameter through the reaming drill bit on the outer tube to form a borehole; the core formed by drilling with the drilling bit is brought into the outer tube, and the core is brought into the inner tube through the screw between the drilling bit and the connecting block to realize temporary storage of the core. After the core sampling is completed, the connecting block and the outer tube are separated from each other, and the connecting block and the inner tube are taken out of the borehole together to realize the acquisition of the core, and the replacement operation of the drilling bit is realized, and there is no need to perform the overall drill lifting operation of the drilling tool, the time consumption is relatively short, and the construction efficiency is relatively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of a small-diameter spiral advance drilling tool provided in an embodiment of the present application.

[0034] Marks and corresponding parts names in the attached drawings:

[0035] 1-outer tube, 2-connecting block, 3-inner tube, 4-drilling bit, 5-screw, 6-reaming bit, 7-reamer, 8-fishing cap, 9-pop-up card, 10-clip slot. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with examples and drawings. The illustrative implementation scheme of the present application and its description are only used to explain the present application and are not intended to limit the present application.

[0037] First, as Figure 1 As shown, an embodiment of the present application provides a small-diameter spiral advance drilling tool, which includes an outer tube 1, a connecting block 2, an inner tube 3 and a drilling bit 4.

[0038] The outer tube 1 can be configured as a circular tube such as a steel tube, a titanium alloy tube, or a nickel-based alloy tube. A reaming drill bit 6 is disposed on the outer wall end of the outer tube 1 , and the reaming drill bit 6 can be fixedly connected to the end face of one end of the outer tube 1 .

[0039] The connecting block 2 can be configured as a hollow circular cylinder, and necessary electrical components, such as data acquisition chips, sensors, wireless modules, etc., can be configured in the connecting block 2. The connecting block 2 is located in the outer tube 1 and is detachably connected to the outer tube 1, wherein the connecting block 2 and the outer tube 1 are coaxially arranged with a spacing therebetween, so that after the connection between the connecting block 2 and the outer tube 1 is released, the connecting block 2 can slide freely in the outer tube 1; the outer wall of the connecting block 2 can be subjected to sharp edge blunting treatment, for example, the sharp edges can be rounded, so that the connecting block 2 can slide more smoothly in the outer tube 1, reducing the risk of the connecting block 2 being stuck.

[0040] The inner tube 3 can be configured as a circular tube body. The main function of the inner tube 3 is to temporarily store the core. The material of the inner tube 3 is not particularly limited. It can be configured as a steel tube. The inner tube 3 is located inside the outer tube 1 and is coaxially arranged with the outer tube 1. There is also a gap between the inner tube 3 and the outer tube 1. The inner tube 3 is connected to the connecting block 2, so that the inner tube 3 can be driven by the connecting block 2 to slide freely in the outer tube 1. In actual implementation, the outer diameter of the inner tube 3 can be equal to the diameter of the connecting block 2; wherein, the inner tube 3 and the connecting block 2 are detachably connected. When the connecting block 2 drives the inner tube 3 to move outside the well, the core can be obtained by disassembling the inner tube 3 and the connecting block 2.

[0041] The drilling bit 4 can be configured as an alloy drill bit commonly used for drilling holes. The drilling bit 4 is located at one side of the end of the outer tube 1. The drilling bit 4 is connected to the connecting block 2 through a screw 5, wherein the screw 5 is located in the inner tube 3, and there is a gap between the drilling bit 4 and the port of the outer tube 1.

[0042] The small-diameter spiral advance drilling tool provided in the embodiment of the present application can realize hole drilling through the drilling bit 4, and expand the hole diameter through the reaming drill bit 6 on the outer tube 1 to form a borehole; the core formed by drilling with the drilling bit 4 is brought into the outer tube 1, and the core is brought into the inner tube 3 through the screw 5 between the drilling bit 4 and the connecting block 2 to realize temporary storage of the core. After the core sampling is completed, the connecting block 2 and the outer tube 1 are separated from each other, and the connecting block 2 and the inner tube 3 are taken out of the borehole together to realize the acquisition of the core, and the replacement operation of the drilling bit 4 is realized, and there is no need to perform the overall drilling operation of the drilling tool, the time consumption is relatively short, and the construction efficiency is relatively improved.

[0043] In some optional embodiments, a reamer 7 is disposed on the outer wall of the outer tube 1 .

[0044] The small-diameter spiral advance drilling tool provided in the embodiment of the present application, by setting the reamer 7 on the outer wall of the outer tube 1, makes the entire drilling process more efficient and stable. The reamer 7 on the outer wall can effectively expand the borehole diameter to meet specific engineering needs; at the same time, setting the reamer 7 on the outer wall of the outer tube 1 can reduce the resistance during the drilling process, making it easier for the drill bit to pass through the formation, thereby improving the drilling efficiency; and the setting of the reamer 7 can enhance the stability of the drilling structure and avoid deformation or collapse of the drilling hole.

[0045] In some optional embodiments, the number of the reamers 7 is configured to be multiple and arranged at intervals along the axial direction of the outer tube 1.

[0046] The small-diameter spiral advance drilling tool provided in the embodiment of the present application is provided with a plurality of reamers 7, which is conducive to stably expanding the borehole diameter, thereby further improving the stability of the borehole structure and further reducing the risk of deformation or collapse of the borehole.

[0047] In some optional embodiments, the connection block 2 is provided with a salvage cap 8, the salvage cap 8 and the screw 5 are respectively located on opposite sides of the connection block 2, and the salvage cap 8 can be constructed into a conical shape, that is, the salvage cap 8 can include a connecting column and a salvage head, the connecting column is connected to the connection block 2, the salvage head is a conical block, and the salvage head is connected to the connecting column.

[0048] The small-diameter spiral advance drilling tool provided in the embodiment of the present application, after setting the salvage cap 8 on the connecting block 2, the construction personnel can operate the salvage tool on the well to cooperate with the salvage cap 8 to separate the connecting block 2 from the outer tube 1, which is convenient to operate and implement, and is conducive to improving the construction efficiency.

[0049] In some optional embodiments, a spring card 9 is provided on the connecting block 2, and a snap-in groove 10 adapted to the spring card 9 is provided on the inner wall of the outer tube 1; wherein, the number of the spring card 9 can be set to multiple, and the multiple spring card 9 is evenly distributed circumferentially around the axial direction of the outer tube 1.

[0050] The small-diameter spiral advance drilling tool provided in the embodiment of the present application utilizes a spring card 9 and a clamping groove 10 to form a detachable connection between the outer tube 1 and the connecting block 2. The operation is simple. The connecting block 2 and the outer tube 1 can be separated by applying an external force to the connecting block 2 to elastically deform the spring card 9. The disassembly efficiency is relatively high. At the same time, in the process of matching the connecting block 2 and the outer tube 1, the connection between the connecting block 2 and the outer tube 1 can be achieved by applying an external force to the connecting block 2 and the spring card 9 elastically deforms and enters the clamping groove 10. The operation is simple, the requirements for disassembly tools are relatively low, and it is beneficial to improve the construction efficiency.

[0051] In some optional embodiments, the ejection card 9 is configured as an annular spring sheet, wherein the engaging groove 10 is constructed as an annular groove.

[0052] In the small-diameter spiral advance drilling tool provided in the embodiment of the present application, after the ejection card 9 is configured as an annular spring piece and the clamping groove 10 is constructed as an annular groove, the cooperation between the ejection card 9 and the clamping groove 10 is more stable, which can resist increased vibration and avoid the situation where the connecting block 2 and the outer tube 1 separate from each other during the drilling process, thereby ensuring the stability of the drilling process; compared with setting the number of ejection cards 9 to be multiple, the positioning process of the annular spring piece and the annular groove is simpler, and the cooperation efficiency between the connecting block 2 and the outer tube 1 is higher.

[0053] In some optional embodiments, the screw 5 and the inner tube 3 are coaxially arranged.

[0054] In the small-diameter spiral advance drilling tool provided in the embodiment of the present application, after the core is brought into the inner tube 3, since the screw 5 is coaxially arranged with the inner tube 3, the screw 5 is subjected to balanced force in the circumferential direction, thereby ensuring the structural stability of the screw 5 and the connection stability between the screw 5 and the connecting block 2.

[0055] In some optional embodiments, the outer tube 1 includes a first section and a second section, and the inner diameter of the first section is smaller than the inner diameter of the second section; wherein the reaming drill bit 6 is disposed in the first section.

[0056] The small-diameter spiral advance drill provided in the embodiment of the present application has an inner diameter of the first section that is smaller than the inner diameter of the second section, that is, the wall thickness of the first section is greater than the wall thickness of the second section, so that the structural strength of the first section is greater than the structural strength of the second section, and can withstand the pressure from the reaming drill bit 6, thereby ensuring the overall structural stability of the drill.

[0057] In some optional embodiments, the end surface of the first segment close to the second segment is constructed as a wedge surface structure.

[0058] The small-diameter spiral advance drill provided in the embodiment of the present application has a first section and a second section transitioned by a wedge surface structure, so that the structural strength between the two is better, the overall structural stability of the drill is guaranteed, and it is conducive to the stable drilling operation.

[0059] In a second aspect, an embodiment of the present application provides a drilling device, comprising any one of the above-mentioned small-diameter spiral advance drilling tools.

[0060] The above specific embodiments illustrate the implementation methods of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the above description contains many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0061] It should be noted that in this specification, similar numbers and letters represent similar items in the above drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of this application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application 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 this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A small-caliber spiral advance drilling tool, characterized in that: include: An outer tube (1), wherein an outer wall end of the outer tube (1) is provided with a reaming drill bit (6); A connecting block (2), the connecting block (2) being located inside the outer tube (1) and being detachably connected to the outer tube (1); an inner tube (3), the inner tube (3) being located inside the outer tube (1) and arranged coaxially with the outer tube (1), the inner tube (3) being connected to the connecting block (2); A drilling bit (4), the drilling bit (4) being located at one side of the end of the outer tube (1), the drilling bit (4) being connected to the connecting block (2) via a screw rod (5), wherein the screw rod (5) is located inside the inner tube (3), and there is a gap between the drilling bit (4) and the port of the outer tube (1).

2. The small-diameter spiral advance drilling tool according to claim 1 is characterized in that: A reamer (7) is arranged on the outer wall of the outer tube (1).

3. The small-diameter spiral advance drilling tool according to claim 2 is characterized in that: The number of the expanders (7) is configured to be multiple and arranged at intervals along the axial direction of the outer tube (1).

4. The small-diameter spiral advance drilling tool according to claim 1, characterized in that: The connection block (2) is provided with a salvage cap (8).

5. The small-diameter spiral advance drilling tool according to claim 1, characterized in that: The connection block (2) is provided with an elastic card (9), and the inner wall of the outer tube (1) is provided with a clamping groove (10) adapted to the elastic card (9).

6. The small-diameter spiral advance drilling tool according to claim 5, characterized in that: The spring card (9) is configured as an annular spring sheet, wherein the clamping groove (10) is constructed as an annular groove.

7. The small-diameter spiral advance drilling tool according to claim 2, characterized in that: The screw (5) and the inner tube (3) are coaxially arranged.

8. The small-diameter spiral advance drilling tool according to claim 1, characterized in that: The outer tube (1) comprises a first section and a second section, the inner diameter of the first section being smaller than the inner diameter of the second section; Wherein, the reaming drill bit (6) is arranged in the first section.

9. The small-diameter spiral advance drilling tool according to claim 8, characterized in that: An end surface of the first section close to the second section is configured as a wedge surface structure.

10. A drilling device, characterized in that: It comprises the small-diameter spiral advance drilling tool as described in any one of claims 1 to 9.

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