Non-magnetic drill rod for underground coal mine track instrument
By designing a magnetic drill rod for underground tracking instruments of coal mines and using low-carbon alloy steel or titanium alloy materials, the problem of magnetic sensors in the prior art being unable to accurately measure azimuth angle due to magnetic interference is solved, and accurate measurement and evaluation of gas extraction effect in a magnetic environment are achieved.
Patent Information
- Application Number
- CN202421907544.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-08
AI Technical Summary
During the drilling process of existing trackmeter probe pipes, due to the interference of the magnetic sensor by ferromagnetic materials, the azimuth angle cannot be accurately measured, which affects the gas extraction effect.
A magnetic-free drill pipe for underground track meter of coal mines was designed. Through a combined structure of magnetic-free drill pipe, magnetic-free drill pipe and magnetic-free drill pipe on the bottom, low-carbon alloy steel or titanium alloy material was used to ensure that the track meter probe pipe works in a magnetic-free environment.
It realizes accurate measurement of the azimuth angle of the drilling hole in a magnetic interference environment, improves the accuracy of the evaluation of gas extraction effect, and ensures safe production of coal mines.
Smart Images
Figure CN222863325U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal mine drilling, in particular to a non-magnetic drill rod for an underground tracker in a coal mine. Background Art
[0002] In some coal mines in my country, especially those with high concentrations of gas, workers use a crawler-type fully hydraulic tunnel drill for safe mining. This drill can drill multiple rotating holes on the working surface of the coal mine. The main purpose of these holes is to extract gas from the coal seam. Only when the gas content drops below the safety standard will the miners continue to dig forward.
[0003] However, during the drilling process, due to the complexity and variability of underground geological conditions and the differences in the technical level of the drillers, the path of the borehole is often not a straight line, but will deviate. In order to ensure that the borehole can effectively extract gas, we need to know the exact path of the borehole, including its inclination angle and the direction it points to, that is, the azimuth.
[0004] To achieve this, workers use a tool called a tracker probe, which can continuously measure the inclination and azimuth as the borehole goes deeper. However, the existing technology has the following problems: the tracker probe usually measures the azimuth through a magnetic sensor, while the tunnel drill, drill rod, and even the drill bit are made of ferromagnetic materials, which will interfere with the normal operation of the magnetic sensor and make it impossible to accurately measure the azimuth.
[0005] In order to solve this problem, we need to create an environment with almost no magnetic field interference for the tracker probe to accurately measure the azimuth of the borehole. When the drilling is completed, the data collected by the tracker probe can be received by the equipment near the hole mouth, and based on these data, it can be judged whether the drilling has achieved the expected extraction effect, thereby ensuring the safe production of the coal mine. Utility Model Content
[0006] According to the above technical problems, the utility model provides a non-magnetic drill rod for a tracker in a coal mine, which creates a relatively non-magnetic environment for the tracker probe to accurately measure the magnetic azimuth;
[0007] A non-magnetic drill rod for a tracker in a coal mine, comprising a lower non-magnetic drill rod, a probe tube non-magnetic drill rod and an upper non-magnetic drill rod, wherein the lower non-magnetic drill rod, the probe tube non-magnetic drill rod and the upper non-magnetic drill rod are sequentially connected by threads, a tracker probe tube is fixedly installed in the probe tube non-magnetic drill rod, the upper non-magnetic drill rod is connected to the probe tube non-magnetic drill rod and the tracker probe tube is fixed in the probe tube non-magnetic drill rod, so as to ensure that the tracker probe tube is in a relatively non-magnetic environment when working;
[0008] Furthermore, the left and right ends of the upper non-magnetic drill rod are respectively provided with an upper non-magnetic female thread and an upper non-magnetic male thread; the left and right ends of the probe tube non-magnetic drill rod are respectively provided with a probe tube non-magnetic female thread and a probe tube non-magnetic male thread; the left and right ends of the lower non-magnetic drill rod are respectively provided with a lower non-magnetic female thread and a lower non-magnetic male thread; the upper non-magnetic drill rod is connected to the probe tube non-magnetic female thread of the probe tube non-magnetic drill rod through the upper non-magnetic male thread; the probe tube non-magnetic drill rod is connected to the lower non-magnetic female thread of the lower non-magnetic drill rod through the probe tube non-magnetic male thread;
[0009] Furthermore, the thread surfaces of the non-magnetic male thread of the probe tube and the lower non-magnetic male thread are both conical structures and are threadedly connected to each other; the taper range is 1:4 to 1:8; the thread tooth shape of the non-magnetic male thread of the probe tube and the lower non-magnetic male thread is a 60° triangular thread;
[0010] Furthermore, the thread surfaces of the probe tube without magnetic female threads and the upper non-magnetic male threads are both conical structures and are threadedly connected to each other; the taper range is 1:10 to 1:30; the thread tooth shape of the probe tube without magnetic female threads and the upper non-magnetic female threads is a 60° triangular thread;
[0011] Furthermore, a tracker probe tube is arranged inside the probe tube non-magnetic drill rod; a fixing plate is fixedly connected to the outer side wall of the tracker probe tube; a mounting groove for fixing the tracker probe tube is opened on the inner side wall of the probe tube non-magnetic drill rod, and the mounting groove fixes the tracker probe tube by clamping the fixing plate; a centralizer is arranged between the tracker probe tube and the probe tube non-magnetic drill rod;
[0012] Furthermore, the lower non-magnetic drill rod male thread is matched and connected with the used drill bit female thread, and the upper non-magnetic drill rod female thread is matched and connected with the male thread of the common drill rod;
[0013] Furthermore, the cross-section of the lower non-magnetic drill rod, the probe non-magnetic drill rod and the upper non-magnetic drill rod can be processed into any shape of a circle, a triangle, or a spiral according to the equipped drilling tool. The outer diameter range of the lower non-magnetic drill rod, the probe non-magnetic drill rod and the upper non-magnetic drill rod is φ50~φ89
[0014] Furthermore, the material of the lower non-magnetic drill rod, the probe non-magnetic drill rod and the upper non-magnetic drill rod is one of low-carbon alloy steel and titanium alloy to ensure a non-magnetic environment inside.
[0015] The beneficial effects of the utility model are:
[0016] The utility model adds a lower non-magnetic drill rod, a probe tube non-magnetic drill rod and an upper non-magnetic drill rod, adopts low-carbon alloy steel and titanium alloy, and fixes the tracker probe tube inside the probe tube non-magnetic drill rod through a fixing plate, thereby ensuring that it is in a non-magnetic environment and is not disturbed by the magnetic field, so as to more accurately measure the azimuth. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural diagram of the non-magnetic drill rod of the utility model.
[0018] Figure 2 This is a structural diagram of the non-magnetic drill rod of the probe tube of the utility model.
[0019] Figure 3 This is a structural diagram of the non-magnetic drill rod of the utility model.
[0020] Figure 4 The utility model is a schematic diagram of assembling a non-magnetic drill rod for a coal mine underground tracker.
[0021] As shown in the figure: 1. Non-magnetic drill rod on top; 1-1. Non-magnetic female thread on top; 1-2. Non-magnetic male thread on top; 1-3. Bell mouth; 2. Non-magnetic drill rod on probe tube; 2-1. Non-magnetic female thread on probe tube; 2-2. Non-magnetic male thread on probe tube; 2-3. Step hole; 3. Non-magnetic drill rod on bottom; 3-1. Non-magnetic female thread on bottom; 3-2. Non-magnetic male thread on bottom; 4. Tracker probe tube; 4-1. Fixing plate; 4-2. Centralizer. DETAILED DESCRIPTION
[0022] The following is combined with Figure 1-4 The utility model is further described in detail:
[0023] This embodiment provides a non-magnetic drill rod for a coal mine underground tracker. Figure 1 to Figure 4 As shown, it includes a lower non-magnetic drill rod 3, a probe tube non-magnetic drill rod 2 and an upper non-magnetic drill rod 1, wherein the lower non-magnetic drill rod 3, the probe tube non-magnetic drill rod 2 and the upper non-magnetic drill rod 1 are connected in sequence by threads, a tracker probe tube 4 is fixedly installed in the probe tube non-magnetic drill rod 2, and the upper non-magnetic drill rod 1 is connected to the probe tube non-magnetic drill rod 2 and the tracker probe tube 4 is fixed in the probe tube non-magnetic drill rod 2, so as to ensure that the tracker probe tube 4 is in a relatively non-magnetic environment when working; in this embodiment, the non-magnetic drill rod is composed of three parts: the lower non-magnetic drill rod 3, the probe tube non-magnetic drill rod 2 and the upper non-magnetic drill rod 1, which are connected in sequence by threads; this design facilitates assembly and disassembly, and at the same time ensures that the tracker probe tube 4 is in a relatively non-magnetic environment when working; the segmented design improves the flexibility of use, and the non-magnetic environment ensures the accuracy of the measurement data of the tracker probe tube 4, which is crucial to the evaluation of the gas extraction effect;
[0024] according to Figure 1 to Figure 4As shown, the left and right ends of the upper non-magnetic drill rod 1 are respectively provided with an upper non-magnetic female thread 1-1 and an upper non-magnetic male thread 1-2; the left and right ends of the probe tube non-magnetic drill rod 2 are respectively provided with a probe tube non-magnetic female thread 2-1 and a probe tube non-magnetic male thread 2-2; the left and right ends of the lower non-magnetic drill rod 3 are respectively provided with a lower non-magnetic female thread 3-1 and a lower non-magnetic male thread 3-2; the upper non-magnetic drill rod 1 is connected to the probe tube non-magnetic female thread 2-1 of the probe tube non-magnetic drill rod 2 through the upper non-magnetic male thread 1-2; the probe tube non-magnetic drill rod 2 is connected to the lower non-magnetic female thread 3-1 of the lower non-magnetic drill rod 3 through the probe tube non-magnetic male thread 2-2; the thread surfaces of the probe tube non-magnetic male thread 2-2 and the lower non-magnetic male thread 3-2 are both conical structures, and are threadedly connected to each other; the taper range is 1:4 to 1:8; the thread tooth shape of the probe tube non-magnetic male thread 2-2 and the lower non-magnetic male thread 3-2 is 60 ° triangular thread; the thread surfaces of the probe tube non-magnetic female thread 2-1 and the upper non-magnetic male thread 1-2 are both conical structures and are threadedly connected to each other; the taper range is 1:10~1:30; the thread tooth shape of the probe tube non-magnetic female thread 2-1 and the upper non-magnetic female thread 1-1 is a 60° triangular thread; in this embodiment, the lower non-magnetic drill rod 3, the probe tube non-magnetic drill rod 2 and the upper non-magnetic drill rod 1 are connected to each other through specific non-magnetic female threads and male threads, such as between the upper non-magnetic drill rod 1 and the probe tube non-magnetic drill rod 2, and between the probe tube non-magnetic drill rod 2 and the lower non-magnetic drill rod 3; the thread surface adopts a conical structure and a 60° triangular thread, with different taper ranges; the conical thread enhances the tightness and stability of the connection, and the 60° triangular thread is easy to process and has good sealing; different taper designs adapt to the needs of different connection parts to ensure connection strength and sealing;
[0025] according to Figure 1 to Figure 4 As shown, a tracker probe tube 4 is arranged inside the probe tube non-magnetic drill rod 2; a fixing plate 4-1 is fixedly connected to the outer wall of the tracker probe tube 4; a mounting groove 1-3 for fixing the tracker probe tube 4 is opened on the inner wall of the probe tube non-magnetic drill rod 2, and the mounting groove 1-3 fixes the tracker probe tube 4 by clamping the fixing plate 4-1; a centralizer 4-2 is arranged between the tracker probe tube 4 and the probe tube non-magnetic drill rod 2; in this embodiment, a mounting groove 1-3 is arranged inside the probe tube non-magnetic drill rod 2, and the tracker probe tube 4 is fixed in the drill rod by clamping the fixing plate 4-1; at the same time, a centralizer 4-2 is also arranged between the tracker probe tube 4 and the drill rod; this fixing method is stable and reliable, which ensures the stability of the tracker probe tube 4 during the drilling process and reduces the measurement error caused by vibration or impact; the centralizer 4-2 further ensures the center position of the probe tube in the drill rod, and improves the measurement accuracy;
[0026] according to Figure 1 to Figure 4As shown, the male thread of the lower non-magnetic drill rod 3 is matched with the female thread of the drill bit used, and the female thread of the upper non-magnetic drill rod 1 is matched with the male thread of the ordinary drill rod; in this embodiment, the lower non-magnetic drill rod 3 is connected to the drill bit through a specific thread, and the upper non-magnetic drill rod 1 is connected to the ordinary drill rod, thereby achieving compatibility with different drilling tools; this design enables the non-magnetic drill rod to be easily integrated into the existing drilling system without large-scale modification of the existing equipment, thereby reducing the use cost and time cost;
[0027] according to Figure 1 to Figure 4 As shown, the lower non-magnetic drill rod 3, the probe non-magnetic drill rod 2 and the upper non-magnetic drill rod 1 can be processed into any shape of round, triangular, or spiral according to the equipped drilling tools, and the outer diameters of the lower non-magnetic drill rod 3, the probe non-magnetic drill rod 2 and the upper non-magnetic drill rod 1 are in the range of φ50 to φ89; in this embodiment, the selection of a variety of shapes and sizes enables the non-magnetic drill rod to adapt to different geological conditions and drilling requirements, thereby improving the drilling efficiency and success rate;
[0028] according to Figure 1 to Figure 4 As shown, the material of the lower non-magnetic drill rod 3, the probe non-magnetic drill rod 2 and the upper non-magnetic drill rod 1 is one of low-carbon alloy steel and titanium alloy to ensure the internal non-magnetic environment. In this embodiment, both low-carbon alloy steel and titanium alloy have good non-magnetic properties and mechanical properties, and can maintain stability and reliability in a complex downhole environment; at the same time, these materials also have high corrosion resistance and wear resistance, which extends the service life of the drill rod.
[0029] In summary, the implementation principle of the utility model is:
[0030] When using this utility model, press Figure 4 As shown, the lower non-magnetic drill rod 3, the probe tube non-magnetic drill rod 2 and the upper non-magnetic drill rod 1 are connected end to end in sequence, the tracker probe tube 4 is installed in the probe tube non-magnetic drill rod 2, the fixing plate 4-1 is embedded in the step hole 2-3 of the probe tube non-magnetic drill rod, and the stabilizer 4-2 ensures that the tracker probe tube is located at the center of the probe tube non-magnetic drill rod. After the lower non-magnetic drill rod, the probe tube non-magnetic drill rod and the upper non-magnetic drill rod are connected, the tracker probe tube is in a relatively non-magnetic environment, which can measure accurate azimuth and ensure effective measurement.
[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A non-magnetic drill rod for a coal mine underground tracker, comprising a lower non-magnetic drill rod (3), a probe non-magnetic drill rod (2) and an upper non-magnetic drill rod (1), characterized in that: The lower non-magnetic drill rod (3), the probe tube non-magnetic drill rod (2) and the upper non-magnetic drill rod (1) are connected in sequence via threads; a tracker probe tube (4) is fixedly installed in the probe tube non-magnetic drill rod (2); the upper non-magnetic drill rod (1) is connected to the probe tube non-magnetic drill rod (2) and the tracker probe tube (4) is fixed in the probe tube non-magnetic drill rod (2) to ensure that the tracker probe tube (4) is in a relatively non-magnetic environment when working.
2. The non-magnetic drill rod for underground tracker in coal mine according to claim 1, characterized in that The left and right ends of the upper non-magnetic drill rod (1) are respectively provided with an upper non-magnetic female thread (1-1) and an upper non-magnetic male thread (1-2); the left and right ends of the probe tube non-magnetic drill rod (2) are respectively provided with a probe tube non-magnetic female thread (2-1) and a probe tube non-magnetic male thread (2-2); the left and right ends of the lower non-magnetic drill rod (3) are respectively provided with a lower non-magnetic female thread (3-1) and a lower non-magnetic male thread (3-2); the upper non-magnetic drill rod (1) is connected to the probe tube non-magnetic female thread (2-1) of the probe tube non-magnetic drill rod (2) through the upper non-magnetic male thread (1-2); the probe tube non-magnetic drill rod (2) is connected to the lower non-magnetic female thread (3-1) of the lower non-magnetic drill rod (3) through the probe tube non-magnetic male thread (2-2).
3. The non-magnetic drill rod for underground tracker in coal mine according to claim 2, characterized in that The thread surfaces of the probe tube non-magnetic male thread (2-2) and the lower non-magnetic male thread (3-2) are both conical structures and are threadedly connected to each other; the taper range is 1:4 to 1:8; the thread tooth shape of the probe tube non-magnetic male thread (2-2) and the lower non-magnetic male thread (3-2) is a 60° triangular thread.
4. The non-magnetic drill rod for underground tracker in coal mine according to claim 2, characterized in that The thread surfaces of the probe tube non-magnetic female thread (2-1) and the upper non-magnetic male thread (1-2) are both conical structures and are threadedly connected to each other; the taper range is 1:10 to 1:30; the thread tooth shape of the probe tube non-magnetic female thread (2-1) and the upper non-magnetic female thread (1-1) is a 60° triangular thread.
5. The non-magnetic drill rod for underground coal mine tracker according to claim 1, characterized in that A tracker probe tube (4) is arranged inside the probe tube non-magnetic drill rod (2); a fixing plate (4-1) is fixedly connected to the outer side wall of the tracker probe tube (4); a mounting groove (1-3) for fixing the tracker probe tube (4) is provided on the inner side wall of the probe tube non-magnetic drill rod (2), and the mounting groove (1-3) fixes the tracker probe tube (4) by clamping the fixing plate (4-1); and a centralizer (4-2) is arranged between the tracker probe tube (4) and the probe tube non-magnetic drill rod (2).
6. The non-magnetic drill rod for underground tracker in coal mine according to claim 2, characterized in that The male thread of the lower non-magnetic drill rod (3) is matched and connected with the female thread of the drill bit used, and the female thread of the upper non-magnetic drill rod (1) is matched and connected with the male thread of an ordinary drill rod.
7. The non-magnetic drill rod for underground tracker in coal mine according to claim 1, characterized in that The cross-sections of the lower non-magnetic drill rod (3), the probe non-magnetic drill rod (2) and the upper non-magnetic drill rod (1) can be processed into any shape of a circle, a triangle or a spiral according to the drill tools provided. The outer diameters of the lower non-magnetic drill rod (3), the probe non-magnetic drill rod (2) and the upper non-magnetic drill rod (1) range from φ50 to φ89.
8. The non-magnetic drill rod for underground coal mine tracker according to claim 1, characterized in that The material of the lower non-magnetic drill rod (3), the probe non-magnetic drill rod (2) and the upper non-magnetic drill rod (1) is one of low-carbon alloy steel and titanium alloy to ensure a non-magnetic environment inside.