A cable-free multifunctional directional detection equipment based on gravity

Abstract

The utility model discloses a kind of cableless directional detection equipment of drilling under gravity action, spiral non-magnetic drill pipe is arranged, first end support assembly, gravity eccentric measuring assembly and second end support assembly are sequentially arranged in the axial direction in the spiral non-magnetic drill pipe;The first end support assembly is provided with first shock-absorbing plug, first bearing and first bearing outer sleeve are sleeved in first shock-absorbing plug outer end portion, first shock-absorbing support is arranged outside first bearing outer sleeve;The second end support assembly is provided with second shock-absorbing plug, second bearing and second bearing outer sleeve are sleeved in second shock-absorbing plug outer end portion, second shock-absorbing support is arranged outside second bearing outer sleeve.In the scheme, central measuring site is gravity eccentric design, both ends support realizes unobstructed rotation, keep gravity eccentric measuring probe pipe in upper and lower direction at any time, finally realize entire coal seam drilling structure detection and low resistance hazard directional detection.

Description

Technical Field

[0001] This utility model belongs to the technical field of underground drilling measurement instruments in coal mines, and relates to a multi-functional directional detection equipment for cableless drilling based on gravity. Background Technology

[0002] Currently, most methods for detecting directional structures and low-resistivity hazards along coal seams in underground coal mines involve omnidirectional drilling within the coal seam. This method has the drawback of not being able to detect directional structures and low-resistivity hazards along the coal seam, and there is significant ambiguity in the post-processing of data measured by the borehole probe and in the accurate detection of directional structures and low-resistivity hazards. This invention addresses these shortcomings by employing a gravity-eccentric measurement probe design. The probe contains both a directional structure measurement module and a low-resistivity hazard detection module, and rolling bearings at both ends allow for unimpeded rotation. Therefore, during drilling-while-drilling directional structure measurement and low-resistivity hazard detection around the borehole in underground coal mines, the gravity-eccentric measurement probe remains in the vertical direction at all times, ultimately achieving the goal of directional structure measurement and low-resistivity hazard detection around the entire borehole. Furthermore, the multi-functional directional detection equipment for cableless drilling under gravity based on the present invention is applicable to both actual underground coal mine drilling and secondary re-measurement operations, thus broadening the application scope of the present invention in underground coal mines. The multi-functional directional detection equipment for cableless drilling under gravity based on the present invention has strong overall seismic resistance, excellent and stable sealing performance, and does not suffer from wire breakage, short circuit or loss of measurement data. Summary of the Invention

[0003] To address the shortcomings of the aforementioned background technology, this utility model provides a multi-functional directional detection equipment for cableless drilling under gravity. This equipment overcomes the limitations of existing technologies, such as the inability to orient boreholes along coal seams, and the significant ambiguity in post-processing of data measured by the borehole probe to determine the directional structure around the borehole and to accurately locate low-resistivity hazards.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A multi-functional directional detection device for cableless drilling under gravity is provided, which is equipped with a spiral non-magnetic drill rod, and a first end support assembly, a gravity eccentricity measurement assembly and a second end support assembly are sequentially arranged along the axial direction in the spiral non-magnetic drill rod.

[0006] The first end support assembly and the second end support assembly together support the gravity eccentricity measuring assembly to rotate freely 360° axially.

[0007] Under the influence of gravitational eccentricity, the measurement direction of the gravity eccentricity measuring component is always on the vertical line of gravity of the coal seam to be measured;

[0008] The first end support assembly is provided with a first shock-absorbing plug, and a first bearing and a first bearing outer sleeve are sleeved on the outer end of the first shock-absorbing plug. A first shock-absorbing bracket is provided outside the first bearing outer sleeve.

[0009] The second end support assembly is provided with a second shock-absorbing plug, and a second bearing and a second bearing outer sleeve are sleeved on the outer end of the second shock-absorbing plug. A second shock-absorbing bracket is provided outside the second bearing outer sleeve.

[0010] Optionally, one end of the first shock-absorbing plug is a solid conical part; the other end of the first shock-absorbing plug is a tubular structure and is embedded in the end of the gravity eccentricity measuring component for sealing connection.

[0011] Optionally, the first shock absorber bracket consists of multiple protruding blocks spaced apart circumferentially, and both the first bearing sleeve and the first shock absorber bracket are integrally injection molded from rubber; the maximum outer diameter of the first shock absorber bracket is larger than the maximum outer diameter of the first shock absorber plug, and the protruding blocks extend axially and are evenly arranged in four.

[0012] Optionally, one end of the second shock absorber plug is a solid conical part; the other end of the second shock absorber plug is a tubular structure, which is fitted and sealed to the end of the gravity eccentricity measuring component; the second shock absorber bracket consists of multiple protruding blocks spaced circumferentially, which, along with the second bearing sleeve, are integrally injection molded from rubber; the maximum outer diameter of the second shock absorber bracket is greater than the maximum outer diameter of the second shock absorber plug, and the protruding blocks extend axially and are evenly arranged in four shapes.

[0013] Optionally, the gravity eccentricity measuring component is provided with a gravity eccentric tube, and an eccentric block is provided along the outer edge of the gravity eccentric tube by axial extension and radial thickening; the thickness of the eccentric block is 3-7mm.

[0014] Optionally, a module mounting frame is also provided inside the gravity eccentric tube. The module mounting frame has at least a semi-open module mounting position along the axial direction, and a tubular module mounting cavity is also provided in axial communication with the module mounting position.

[0015] Optionally, a first measuring module is embedded in the module mounting position, and a second measuring module, a third measuring module, and a battery are coaxially connected in the module mounting cavity; a shock-absorbing component is fitted over the third measuring module, and the shock-absorbing component is a tubular component with multiple buffer slots set along the axial direction on the pipe wall.

[0016] Optionally, the third measuring module is a cylindrical block with a connector at one end and a positioning groove carved along the axial direction on its outer wall.

[0017] Optionally, a spiral annular groove is excavated on the outer wall of the spiral non-magnetic drill rod, and positioning brackets are respectively embedded in the end of the spiral non-magnetic drill rod; the wall thickness between the positioning brackets is greater than the wall thickness at the end.

[0018] Optionally, the positioning bracket is a disc-shaped bracket with a mounting hole at the center and multiple buffer cavities around the mounting hole.

[0019] Compared with the prior art, the advantages and effects of this utility model are as follows:

[0020] The measuring probe is designed with gravity eccentricity and is equipped with rolling bearings at both ends for unimpeded rotation. Therefore, when performing directional structural measurement and low-resistivity hazard detection around the borehole during drilling in coal mines, the gravity eccentric measuring probe can always be kept in the vertical direction. The measuring probe contains a directional structural measurement module and a low-resistivity hazard detection module, ultimately realizing the measurement of the surrounding structure and low-resistivity hazard detection of the entire coal seam borehole. This utility model is a cableless multi-functional directional detection equipment based on gravity, which has excellent seismic performance, excellent water leakage prevention performance, and is simple to install and operate, with high seismic performance, and more stable and reliable circuit connection and measurement data. Attached Figure Description

[0021] The accompanying drawings are provided to further understand the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof.

[0022] Figure 1 This is the general assembly drawing of the multi-functional directional drilling equipment without cables under gravity based on the present invention.

[0023] Figure 2 for Figure 1 Front view and sectional view along the AA direction of the spiral non-magnetic drill rod;

[0024] Figure 3 for Figure 1 The structural diagram of the first end support component, including the front view, left view, and sectional view along the AA direction;

[0025] Figure 4 for Figure 1 The structural diagram of the second end support component, including the front view, right view, and sectional view along the AA direction;

[0026] Figure 5 for Figure 1 A cross-sectional view of the gravity eccentric tube in the middle;

[0027] Figure 6 for Figure 1 The front view of the module installation skeleton and the sectional view of AA;

[0028] Figure 7 for Figure 1 The front view of the positioning bracket and the sectional view of AA;

[0029] Figure 8 for Figure 1 A schematic diagram of the structure of the third measurement module;

[0030] Figure label:

[0031] 1-Helical non-magnetic drill rod, 11-Helical annular groove, 12-Positioning bracket mounting position;

[0032] 2-Gravity eccentricity measurement component, 21-Gravity eccentric tube, 211-Eccentric block, 212-Second end support component mounting end, 213-First end support component mounting end, 22-Module mounting frame, 221-Mounting head, 222-Module mounting position, 223-Module mounting cavity, 23-First measurement module, 24-Second measurement module, 25-Shock absorber, 26-Third measurement module, 261-Connector, 262-Positioning groove, 27-Battery;

[0033] 3-First end support assembly, 31-First shock absorber bracket, 32-First bearing, 33-First bearing outer sleeve, 34-First shock absorber plug, 35-Sealing ring;

[0034] 4-Second end support assembly, 41-Second shock absorber bracket, 42-Second bearing, 43-Second shock absorber plug, 44-Second bearing outer sleeve;

[0035] 5-Positioning bracket, 51-Bracket mounting hole, 52-Buffer cavity. Detailed Implementation

[0036] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0037] In this disclosure, "axial direction" refers to the axial direction in which the intermediate shaft assembly or the two-shaft assembly is located. In this disclosure, "upper", "lower", "left" and "right" refer to the orientation shown in the figure. "Top", "bottom" and "side" refer to the top, bottom and perimeter of the figure, respectively. Unless otherwise specified, the above provisions apply to all contents of this disclosure.

[0038] This invention improves upon the shortcomings of existing measurement methods. The cableless, multi-functional directional drilling detection equipment based on gravity utilizes a spiral non-magnetic drill rod, optimized into a spiral shape to facilitate the removal of cuttings and slag during downhole drilling. The rubber injection-molded integrated component is optimized into a four-wing structure to enhance the stability and durability of the measuring probe within the spiral non-magnetic drill rod. The following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this improvement.

[0039] Combination Figure 1-8 This utility model discloses a multi-functional directional drilling equipment based on gravity-based cableless drilling. It includes a spiral non-magnetic drill rod 1, within which a first end support assembly 3, a gravity eccentricity measuring assembly 2, and a second end support assembly 4 are sequentially arranged axially. The first end support assembly 3 and the second end support assembly 4 jointly support the gravity eccentricity measuring assembly 2 for 360° axial free rotation. Under the influence of gravity eccentricity, the measuring direction of the gravity eccentricity measuring assembly 2 is always on the vertical gravity line of the coal seam to be measured. The first end support assembly 3 is equipped with a first shock-absorbing plug 34, with a first bearing 32 and a first bearing outer sleeve 33 fitted at the outer end of the first shock-absorbing plug 34, and a first shock-absorbing bracket 31 installed outside the first bearing outer sleeve 33. The second end support assembly 4 is equipped with a second shock-absorbing plug 43, with a second bearing 42 and a second bearing outer sleeve 44 fitted at the outer end of the second shock-absorbing plug 43, and a second shock-absorbing bracket 41 installed outside the second bearing outer sleeve 44. Because the gravity eccentric measurement component 2 installed inside the spiral non-magnetic drill rod 1 is designed with gravity eccentricity, this equipment can always keep the measuring probe in the vertical direction when measuring the surrounding structure of the borehole and detecting low-resistivity hazards around the borehole in underground coal mines. Ultimately, the entire equipment can achieve the purpose of directional detection during the drilling process. It has excellent seismic resistance and water leakage prevention performance. Moreover, the installation process is simple, the seismic performance is high, and the circuit connection and measurement data are more stable and reliable.

[0040] In the embodiments disclosed herein, one end of the first shock-absorbing plug 34 is a solid, tapered piece, with a first bearing 32 fitted over it; the other end of the first shock-absorbing plug 34 is a tubular structure, and is embedded in the end of the gravity eccentricity measuring component 2 for sealing connection. More specifically, the first shock-absorbing bracket 31 consists of multiple protruding blocks spaced circumferentially, and both it and the first bearing outer sleeve 33 are integrally injection molded from rubber; the maximum outer diameter of the first shock-absorbing bracket 31 is larger than the maximum outer diameter of the first shock-absorbing plug 34, and the protruding blocks extend axially and are evenly arranged in four pieces, providing more uniform shock-absorbing support in the circumferential direction. The first bearing 32, the first shock-absorbing plug 34, and the molded part are all formed by an internal and external tight fit, forming a single first end support component 3. This effectively reduces vibration during drilling vibration of the measuring probe.

[0041] In the embodiments disclosed herein, one end of the second damping plug 43 is a solid, tapered piece, with a second bearing 42 fitted over it; the other end of the second damping plug 43 is a tubular structure, fitted and sealed to the end of the gravity eccentricity measuring assembly 2; the second damping bracket 41 consists of multiple circumferentially spaced protrusions, both integrally injection molded with rubber as the second bearing sleeve 44; the maximum outer diameter of the second damping bracket 41 is larger than the maximum outer diameter of the second damping plug, and the protrusions extend axially and are evenly arranged in four sections, providing more uniform circumferential damping support. This effectively dampens the measuring probe during drilling vibrations.

[0042] The first bearing 32 and the second bearing 42 are preferably 61804 deep groove ball bearings. The structure of the first damping plug 34 is basically the same as that of the second damping plug 43, except that the structure is adapted to the axial mounting end of the specific gravity eccentricity measuring component 2.

[0043] In the embodiments of this disclosure, the gravity eccentric measurement component 2 is provided with a gravity eccentric tube 21, and an eccentric block 211 is provided along the outer edge of the gravity eccentric tube 21, which extends axially and is radially thickened; the thickness of the eccentric block 211 is 3 to 7 mm, preferably 5 mm; in order to ensure that the measuring probe can always detect the top and bottom plates of the coal seam during the drilling process.

[0044] In the embodiments of this disclosure, a module mounting frame 22 is also provided inside the gravity eccentric tube 21. The module mounting frame 22 has at least a semi-open module mounting position 222 along the axial direction, and a tubular module mounting cavity 223 is also provided in axial communication with the module mounting position 222. For example, a mounting head 221 is also provided at the end of the module mounting position 222 of the module mounting frame 22 for fixing the module mounting frame 22 to the second shock-absorbing plug 43 on the second end support assembly 4. The module mounting position 222 is used to install the first measurement module 23. The module mounting cavity 223 is used to place the second measurement module 24, the third measurement module 26 and the battery 27. All the modules involved in the detection are firmly installed in the module mounting frame 22, which is not only structurally stable, but also compact and has good space utilization, which is conducive to downhole data collection.

[0045] In the embodiments disclosed herein, it is preferable that a shock absorber 25 may also be fitted over the third measurement module 26. The shock absorber 25 is a tubular component with multiple buffer slots arranged axially on the pipe wall, which is beneficial for shock absorption and buffering of the data collection module.

[0046] In the embodiments of this disclosure, the third measurement module 26 is a cylindrical block with a connector 261 at one end and a positioning groove 262 carved along the axial direction on its outer wall. The second measurement module 24 and the third measurement module 26 have basically the same structure, both being embedded in the module mounting frame 22 using a plug-in structure, and cooperating with the structure on the module mounting frame 22 through the positioning groove 262 to achieve positioning and restrictive installation. For example, the third measurement module 26 is a structural detection module, and the second measurement module 24 is a low-resistivity hazard detection module.

[0047] In the embodiments of this disclosure, a spiral annular groove 11 is excavated on the outer wall of the spiral non-magnetic drill rod 1, and positioning brackets 5 are respectively embedded in the ends of the spiral non-magnetic drill rod 1; the wall thickness between the positioning brackets 5 is greater than the wall thickness at the ends. Specifically, a positioning bracket mounting position is provided on the inner wall of the spiral non-magnetic drill rod 1 for mounting the positioning brackets 5 along the vertical axis; the positioning bracket 5 is a disc-shaped bracket with a bracket mounting hole 51 at its center, and multiple buffer cavities 52 are provided around the bracket mounting hole 51.

[0048] This utility model relates to a gravity-based, storage-type top and bottom plate directional detection equipment. It employs rolling bearings at both ends of the gravity-eccentric measuring probe for unobstructed rotation. Therefore, during drilling around coal mines for structural detection and low-resistivity hazard directional detection, the gravity-eccentric measuring probe remains vertically aligned, ultimately enabling comprehensive borehole structural and low-resistivity hazard directional detection. This utility model also provides a complete set of cableless, multi-functional directional detection equipment based on gravity, exhibiting superior seismic resistance and water leakage prevention. Furthermore, it features simple installation, high seismic resistance, and more stable and reliable circuit connections and measurement data.

[0049] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0050] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0051] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A multi-functional directional drilling equipment based on gravity-based cableless drilling, characterized in that, A spiral non-magnetic drill rod (1) is provided, and a first end support assembly (3), a gravity eccentricity measuring assembly (2) and a second end support assembly (4) are sequentially arranged along the axial direction in the spiral non-magnetic drill rod (1). The first end support assembly (3) and the second end support assembly (4) together support the gravity eccentricity measuring assembly (2) to rotate freely in 360° axial direction; Under the action of gravity eccentricity, the measurement direction of the gravity eccentricity measurement component (2) is always on the vertical gravity line of the coal seam to be measured; The first end support assembly (3) is provided with a first shock-absorbing plug (34), and a first bearing (32) and a first bearing outer sleeve (33) are sleeved on the outer end of the first shock-absorbing plug (34). A first shock-absorbing bracket (31) is provided outside the first bearing outer sleeve (33). The second end support assembly (4) is provided with a second shock-absorbing plug (43), and a second bearing (42) and a second bearing outer sleeve (44) are sleeved on the outer end of the second shock-absorbing plug (43). A second shock-absorbing bracket (41) is provided outside the second bearing outer sleeve (44).

2. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 1, characterized in that, One end of the first shock-absorbing plug (34) is a solid conical part; The other end of the first shock-absorbing plug (34) is a tubular structure and is embedded in the end of the gravity eccentricity measuring component (2) for sealing connection.

3. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 1 or 2, characterized in that, The first shock absorber bracket (31) consists of multiple protruding blocks spaced apart along the circumference, and both the first bearing sleeve (33) and the first bearing sleeve are integrally injection molded from rubber. The maximum outer diameter of the first shock absorber bracket (31) is greater than the maximum outer diameter of the first shock absorber plug (34), and the protruding blocks extend axially and are evenly arranged in four.

4. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 1 or 2, characterized in that, The second shock-absorbing plug (43) has a solid conical end; The other end of the second shock-absorbing plug (43) is a tubular structure and is fitted onto the end of the gravity eccentricity measuring component (2) for sealing connection; The second shock absorber bracket (41) consists of multiple protruding blocks spaced apart along the circumference, and both the second bearing sleeve (44) and the second bearing sleeve are integrally injection molded from rubber. The maximum outer diameter of the second shock absorber bracket (41) is greater than the maximum outer diameter of the second shock absorber plug, and the protruding block extends axially and is evenly arranged in four parts.

5. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 1 or 2, characterized in that, The gravity eccentricity measurement component (2) is provided with a gravity eccentric tube (21), and an eccentric block (211) is provided along the outer edge of the gravity eccentric tube (21) by extending axially and thickening radially. The thickness of the eccentric block (211) is 3-7 mm.

6. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 5, characterized in that, A module mounting frame (22) is also provided inside the gravity eccentric tube (21). The module mounting frame (22) has at least a semi-open cavity module mounting position (222) along the axial direction. A tubular module mounting cavity (223) is also provided in axial communication with the module mounting position (222).

7. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 6, characterized in that, A first measuring module (23) is embedded in the module mounting position (222), and a second measuring module (24), a third measuring module (26) and a battery (27) are coaxially connected in the module mounting cavity (223). The third measuring module (26) is fitted with a shock absorber (25), which is a tubular component with multiple buffer seams set along the axial direction on the pipe wall.

8. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 7, characterized in that, The third measuring module (26) is a cylindrical block with a connector (261) at one end and a positioning groove (262) carved along the axial direction on the outer wall.

9. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 1 or 2, characterized in that, A spiral annular groove (11) is dug on the outer wall of the spiral non-magnetic drill rod (1), and a positioning bracket (5) is embedded in the end of the spiral non-magnetic drill rod (1). The wall thickness between the positioning brackets (5) is greater than the wall thickness at the end of the tube.

10. The multi-functional directional drilling equipment based on gravity-driven cableless drilling as described in claim 9, characterized in that, The positioning bracket (5) is a disc-shaped bracket with a bracket mounting hole (51) at the center and multiple buffer cavities (52) around the bracket mounting hole (51).

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