A mine MWD probe device

Abstract

The utility model relates to a kind of mine while drilling surveying probe device, including non-magnetic tube, the axial upper end of the non-magnetic tube is provided with the screen filter inflow valve head that can be in the way of shunt directional flow drilling fluid, still be provided with the magneto-rheological pulse regulation unit in the non-magnetic tube, and the on-off state of the screen filter inflow valve head can be adjusted in cooperation with drilling fluid flow, and the axial lower end of the magneto-rheological pulse regulation unit is also provided with the balance spring base that can provide dynamic balance support for it, the screen filter valve shell of the screen filter inflow valve head is liftable and movable plug-in with the anti-blocking valve body that can change the on-off state of the screen filter valve shell, wherein, the screen filter valve shell is detachably connected with the non-magnetic tube, and the anti-blocking valve body is connected with the axial upper end of the magneto-rheological pulse regulation unit in the way that can be linked with the magneto-rheological pulse regulation unit.

Description

Technical Field

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

[0002] In the field of oil exploration and development, the proportion of directional wells and extended reach wells is continuously increasing. During oil and gas drilling operations, equipment such as Measurement While Drilling (MWD) and Logging While Drilling (LWD) tools are commonly used to acquire parameters such as downhole pressure, temperature, and inclination angle, and to transmit the collected downhole parameters to the surface, thereby achieving real-time monitoring of the drilling process and timely optimization of parameters. Drilling engineering parameters (such as well inclination), geological parameters (such as formation gamma counts and resistivity), sonic data, and parameters measured by rotating geological steering tools, all measured by MWD and LWD, are encoded by an electronic control unit and then transmitted to the surface system via drilling mud using a pulse signal generator. The surface system collects the waveforms generated by the pulse signal generator through pressure sensors on the drilling riser, decodes them, and reconstructs them in real time as downhole engineering and geological parameters.

[0003] Existing measurement-while-drilling (MWD) systems typically require the construction of adjustable, parallel branch channels within the drill string and drill pipe to regulate the flow fluctuations of the directed drilling fluid. This allows for the controlled pulse fluctuations of the drilling fluid flow during directional delivery, facilitating data transmission. While the slotted structure at the inlet of the branch channel in existing MWD systems can filter impurities in the drilling fluid to some extent, ensuring effective flow, it generally lacks cleaning capabilities. During operation, when large particulate impurities in the drilling fluid clog the filter slots, the system cannot automatically clear these slots, hindering the effective and smooth continuous delivery of drilling fluid. Consequently, the MWD system is unable to transmit the acquired data by controlling the pulse fluctuations of the drilling fluid flow. Utility Model Content

[0004] The purpose of this invention is to provide a mining measurement-while-drilling probe device that can automatically clear the hole by utilizing the resetting motion of the valve body structure that forms the branch flow channel before the formation of pulse waves, thereby ensuring the effectiveness and accuracy of the formation of negative pulse waves in drilling fluid flow. This solves the problem that existing drilling directional measurement equipment cannot perform hole clearing on its own, resulting in blockage of the branch flow channel used to induce pulse waves in drilling fluid flow, leading to reduced flow diversion capacity and insufficient flow supply, and thus failing to effectively and accurately generate pulse waves for data transmission.

[0005] The technical solution adopted by this utility model is as follows: a mining measurement while drilling probe device, including a non-magnetic tube, a screening inlet valve head that can directionally guide drilling fluid in a diversion manner is provided at the upper axial end of the non-magnetic tube, a magnetorheological pulse control unit that can adjust the conduction state of the screening inlet valve head in coordination with the drilling fluid flow is also provided in the non-magnetic tube, and a balance spring base that can provide dynamic balance support is provided at the lower axial end of the magnetorheological pulse control unit, and an anti-clogging valve body that can change the conduction state of the screening valve body is movably inserted and lowered in the screening valve body of the screening inlet valve head, wherein the screening valve body is detachably connected to the non-magnetic tube, and the anti-clogging valve body is connected to the upper axial end of the magnetorheological pulse control unit in a manner that can be linked with the magnetorheological pulse control unit.

[0006] According to a preferred embodiment, the lower axial end of the filter valve housing is connected to a drain sleeve that can be coaxially fitted outside the non-magnetic tube and cooperate with the non-magnetic tube to form an annular chamber for directional flow of drilling fluid output from the filter valve housing.

[0007] According to a preferred embodiment, the filter valve housing includes a thick valve seat, a valve housing cylinder, a filter valve cover, and a connecting end, wherein the valve housing cylinder is connected to the top end face of the thick valve seat, and the connecting end is also connected to its bottom end face; the valve housing cylinder is also connected to the upper axial end away from the thick valve seat to a filter valve cover capable of forming an array of mesh-like holes for directional input of drilling fluid.

[0008] According to a preferred embodiment, a plurality of drainage holes for discharging drilling fluid into the valve shell are provided on the thick-body valve seat in a circumferentially spaced manner; a centrally located guide hole for movably inserting the anti-clogging valve body is also provided on the thick-body valve seat; and an end face sealing gasket is also embedded on the bottom surface of the thick-body valve seat.

[0009] According to a preferred embodiment, a plurality of liquid inlet holes are provided on the sloping annular surface of the filter valve cover in a lattice pattern, which can connect the internal cavity of the filter valve housing with the outside. Furthermore, a retrieval ring is provided at the center of the top surface of the filter valve cover.

[0010] According to a preferred embodiment, the anti-clogging valve body includes a valve head, a guide slide, and a clearing column. The valve head is vertically and flexibly inserted into the inner cavity of the filter valve housing in such a way that it can fit against the lower surface of the filter valve cover to block the liquid inlet hole, and the bottom end of the valve head is connected to a guide slide that is slidably inserted into the central guide hole. A clearing column that can be inserted into the liquid inlet hole is provided on the sloping annular surface of the valve head that fits the contour of the lower surface of the filter valve cover.

[0011] According to a preferred embodiment, the balance spring base includes a drilling fluid balance spring seat capable of dividing the cavity of the non-magnetic tube, a drilling fluid balance spring connected to the drilling fluid balance spring seat, and a sealing end that seals the port of the non-magnetic tube and is connected to the drilling fluid balance spring.

[0012] The beneficial effects of this utility model are: The screen inlet valve head provided in this application can be pushed by the cooperation of the magnetorheological pulse control unit and the balance spring base to perform a reset and lifting movement when there is no drilling fluid pressurization. This clears the screen slot at the drilling fluid inlet end, ensuring the smooth flow of the branch flow channel formed to generate negative pulse waves. This allows for the accurate generation of various negative pulse waves of different intensities during subsequent data transmission, facilitating the effective transmission of in-well measurement data.

[0013] The screening inlet valve head provided in this application can be linked with the magnetorheological pulse control unit, enabling the magnetorheological pulse control unit to adjust the conduction state of the screening inlet valve head in coordination with the hydraulic pressure of the directional drilling fluid. Based on the characteristics of magnetorheological fluids—low viscosity Newtonian fluid without a magnetic field, and high viscosity, low fluidity Bingham fluid under an applied magnetic field—and the advantages of magnetorheological fluids such as low energy consumption, fast response (milliseconds), and ease of control during state transformation, the magnetorheological pulse control unit controls the state of the magnetorheological fluid by controlling the electromagnetic field. This controls the movement of the screening inlet valve head, which generates negative pressure pulses in the drilling fluid by changing the conduction state, and enables the transmission of downhole data measured by the drilling measurement tool. This approach offers advantages such as low latency, ease of control, and low power consumption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a preferred mining measurement while drilling probe device proposed in this utility model; Figure 2 This is a schematic diagram of the partial structure of a preferred mining measurement-while-drilling probe device proposed in this utility model when there is no drilling fluid pressure. Figure 3 This is a partial structural diagram of a preferred mining measurement-while-drilling probe device proposed in this utility model when only drilling fluid pressure exists. Figure 4 This is a schematic diagram of the structure of a preferred mining measurement-while-drilling probe device proposed in this utility model when it is in the drill pipe. Detailed Implementation

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0017] The following is a detailed explanation with reference to the accompanying drawings. Example

[0018] This application provides a mining measurement while drilling probe device, which includes a non-magnetic tube 1, a screen inlet valve head 2, a magnetorheological pulse control unit 3, and a balance spring base 4.

[0019] according to Figure 1-4In one specific embodiment, a non-magnetic tubing 1 is inserted into the drill pipe of the drill string, thus following the drill bit during drilling through the formation. A screening inlet valve head 2, capable of directing drilling fluid flow in a diversion manner, is located at the upper axial end of the non-magnetic tubing 1. A magnetorheological pulse control unit 3, capable of adjusting the conduction state of the screening inlet valve head 2 in coordination with the drilling fluid flow, is also installed inside the non-magnetic tubing 1. A balance spring base 4, providing dynamic balance support, is located at the lower axial end of the magnetorheological pulse control unit 3. The screening inlet valve head 2 provided in this application can be linked with the magnetorheological pulse control unit 3, so that the magnetorheological pulse control unit 3 can adjust the conduction state of the screening inlet valve head 2 in coordination with the hydraulic pressure of the directional drilling fluid. Among them, the magnetorheological fluid exhibits the characteristics of a low-viscosity Newtonian fluid when there is no magnetic field, and exhibits the characteristics of a high-viscosity, low-flow Bingham fluid when an external magnetic field is applied. In addition, the magnetorheological fluid has the advantages of low energy consumption, fast response (millisecond level), and easy control in state transformation. The magnetorheological pulse control unit 3 controls the state of the magnetorheological fluid by controlling the electromagnetic field, thereby controlling the movement of the screening inlet valve head 2, which can generate drilling fluid negative pressure pulses by changing the conduction state, and realizing the transmission of downhole data measured by the drilling measurement tool. It has the advantages of low latency, easy control, and low power consumption. The screen inlet valve head 2 provided in this application can be pushed by the cooperation of the magnetorheological pulse control unit 3 and the balance spring base 4 to perform a reset and lifting movement when there is no drilling fluid pressurization. This allows the screen groove at the drilling fluid inlet end to be unblocked, thereby ensuring the smooth flow of the branch flow channel formed to generate negative pulse waves. This enables the accurate generation of various negative pulse waves of different intensities during subsequent data transmission, facilitating the effective transmission of in-well measurement data.

[0020] Preferably, an anti-clogging valve body 22 capable of changing the conduction state of the screen valve body 21 is movably inserted and height-adjustable within the screen valve housing 21 of the screen inlet valve head 2. Preferably, the screen valve housing 21 is detachably connected to the non-magnetic tube 1. More preferably, the anti-clogging valve body 22 is axially connected to the upper end of the magnetorheological pulse control unit 3 in a manner that allows it to be linked with the magnetorheological pulse control unit 3. Thus, the anti-clogging valve body 22 is driven to move axially by the interaction between the magnetorheological pulse control unit 3 and the drilling fluid flowing directionally through the cavity of the screen valve housing 21, so that the drilling fluid flow forms a stepped negative pulse ripple. Preferably, a drain sleeve 23 is connected to the lower axial end of the screen valve housing 21, which can be coaxially fitted outside the non-magnetic tube 1 and cooperate with the non-magnetic tube 1 to form an annular cavity for the directional flow of drilling fluid output from the screen valve housing 21.

[0021] Preferably, the filter valve housing 21 includes a thick valve seat 211, a valve housing cylinder 212, a filter valve cover 213, and a connecting end 214. Preferably, the valve housing cylinder 212, which forms a cavity for inserting and preventing clogging of the valve body 22, is connected to the top end face of the thick valve seat 211 by welding or integral molding, and the connecting end 214 is also connected to its bottom end face by welding or integral molding. Preferably, the upper axial end of the valve housing cylinder 212 away from the thick valve seat 211 is also connected to a filter valve cover 213, which forms an array of mesh holes for directional input of drilling fluid. More preferably, a retrieval ring 215 is provided at the center of the top surface of the filter valve cover 213. Specifically, the connecting end 214 is a connecting tube structure with internal threads, which allows it to be threaded onto the upper axial end of the non-magnetic tube 1 to achieve a stable connection between the filter valve housing 21 and the filter valve housing 22.

[0022] Preferably, the thick valve seat 211 has several drainage holes 2111 arranged circumferentially to drain drilling fluid into the valve housing 212. Preferably, the thick valve seat 211 also has a centrally located guide hole 2112 for the movable insertion of an anti-clogging valve body 22, effectively limiting the sliding direction of the anti-clogging valve body 22, improving its sliding stability, and preventing shaking and displacement. Preferably, the bottom surface of the thick valve seat 211 is fitted with an end-face sealing gasket 2113 to fill the mating gap when the axial end face of the non-magnetic sleeve 1 abuts against it. Preferably, the outer wall of the thick valve seat 211 also has an external threaded step that can be adapted to mate with the drainage sleeve 23.

[0023] Preferably, a plurality of liquid inlet holes 2131 are provided on the sloping annular surface of the filter valve cover 213 in a lattice pattern, which can connect the internal cavity of the filter valve housing 21 with the outside.

[0024] Preferably, the anti-clogging valve body 22 includes a valve head 221, a guide slide 222, and a clearing column 223. Preferably, the valve head 221 is vertically and flexibly inserted into the valve housing guide chamber defined by the thick valve seat 211, the valve housing cylinder 212, and the filter valve cover 213, in a manner that allows it to fit snugly against the lower surface of the filter valve cover 213 and block the liquid inlet hole 2131. More preferably, the bottom end of the valve head 221 is connected to a guide slide 222 that is slidably inserted into the central guide hole 2112. Preferably, a clearing column 223 is provided on the sloping annular surface of the valve head 221 that matches the contour of the lower surface of the filter valve cover 213. This clearing column 223 can be inserted into the liquid inlet hole 2131 to push upward and clean debris blocking the liquid inlet hole 2131, thereby effectively clearing the liquid inlet hole 2131. Preferably, the guide slide 222 extends out of the lower axial end of the central guide through hole 2112 and is connected to the magnetorheological pulse control unit 3 in the non-magnetic tube 1, so that the anti-blocking valve body 22 can move with the magnetorheological pulse control unit 3.

[0025] Preferably, the magnetorheological pulse control unit 3 includes a connecting top plate 31, a first non-magnetic spring 32, a spring through-hole pressure seat 33, and an electromagnetic field generating module 34. Preferably, the connecting top plate 31 is connected to the lower axial end of the guide slide column 222, and its plate cross-section is adapted to the cross-section of the non-magnetic tube 1. The lower surface of the connecting top plate 31 is connected to the first non-magnetic spring 32 placed in the non-magnetic tube 1. Preferably, the end of the first non-magnetic spring 32 away from the connecting top plate 31 is connected to the spring through-hole pressure seat 33, and an electromagnetic field generating module 34 is also arranged below the spring through-hole pressure seat 33. Preferably, the first non-magnetic spring 32, the spring through-hole pressure seat 33, and the electromagnetic field generating module 34 are existing technologies, and the relevant content disclosed in the existing literature "Yi Ming, Zhang Lei, Li Fuqiang, et al. Research on magnetorheological fluid negative pulse generator for vertical well drilling skew measurement [J]. Petroleum Machinery, 2023, 51(10): 32-40." can be directly referred to. Preferably, the connecting top plate 31, the spring through-hole pressure seat 33, and the electromagnetic field generating module 34 all have cross-sectional profiles adapted to the cross-section of the non-magnetic tube 1. Furthermore, the three components are seamlessly slidably installed with the non-magnetic tube 1 by fitting gap-filling washers on their sides. This allows the connecting top plate 31 and the electromagnetic field generating module 34 to segment the cavity of the non-magnetic tube 1, forming a magnetorheological fluid chamber to accommodate the magnetorheological fluid. The magnetorheological fluid can be modulated by the electromagnetic field generated by the electromagnetic field generating module 34, thus controllably suppressing the retraction movement of the anti-clogging valve body 22 under drilling fluid impact. Preferably, the magnetorheological fluid is composed of a mixture of high-permeability micron-sized soft magnetic material, a non-magnetic base fluid, and additives. Preferably, the magnetorheological fluid exists between the lower end of the connecting top plate 31 and the upper end of the drilling fluid balance spring seat 41. The first non-magnetic spring 32, the spring through-hole pressure seat 33, and the electromagnetic field generating module 34 are all immersed in the magnetorheological fluid. Preferably, an annular groove 3411 for accommodating a spiral magnetic coil 342 is formed on the outer wall of the magnetic winding tube 341 of the electromagnetic generation module 34. Preferably, a conductive cavity for accommodating magnetorheological fluid is provided inside the magnetic winding tube 341. Preferably, the magnetic coil 342 is connected to the power control device via a cable placed in the circuit groove, thereby enabling it to generate an electromagnetic field by controllably supplying current to the magnetic coil 342. More preferably, the circuit groove extends axially through the balance spring base 4 to the outside of the non-magnetic tube 1, so that the insulated wires contained in its cavity can be connected to the circuit control device on the circuit frame. Preferably, the circuit frame and battery assembly have a sealed tube shell connected to the axial lower end of the non-magnetic tube 1, and both are housed in the sealed tube shell.More preferably, the circuit frame is equipped with insulated wires and a circuit control device composed of a single-chip microcomputer. The circuit control device, the insulated wires, and the battery assembly are connected in series to form an electrical control circuit. The single-chip microcomputer-driven circuit control device acts as a switch structure to regulate the connection and disconnection between the insulated wires and the battery assembly, so that the battery assembly can adjustably input current to the magnetic induction coil 342, generating an electromagnetic field periodically. The electromagnetic field braking device of the magnetorheological pulse control unit 3 mainly relies on the magnetic induction coil 342 on the magnetic winding tube 341 to generate an induced magnetic field acting on the inside of the magnetic winding tube to achieve braking, thereby realizing the magnetorheological effect of the magnetorheological fluid, and then controlling the movement of the anti-clogging valve body 22 in conjunction with the drilling fluid pressure.

[0026] Preferably, the balance spring base 4 includes a drilling fluid balance spring seat 41 that can divide the cavity of the non-magnetic tube 1, a drilling fluid balance spring 42 connected to the drilling fluid balance spring seat 41, and a sealing end 43 that seals the port of the non-magnetic tube 1 and is connected to the drilling fluid balance spring 42. Preferably, the balance spring seat 41 is connected to the bottom surface of the magnetic winding tube 341 by spaced connecting protrusions, thereby ensuring the support and limiting of the magnetorheological pulse control unit 3. Specifically, the spaced connecting protrusions can expose at least a portion of the lower bottom surface of the magnetic winding tube 341 to the magnetorheological fluid, and are connected to the magnetic winding tube 341 by welding, adhesion, or other means. Preferably, the drilling fluid balance spring seat 41 of the balance spring base 4 and the plugging end 43 form a drilling fluid pressure balance chamber in the non-magnetic tube 1 by means of a partitioned cylinder, and the interior of the chamber is filled with drilling fluid. This is used to balance the pressure in the magnetorheological fluid chamber with the pressure in the drilling fluid pressure balance chamber when the anti-blocking valve body 22 retracts, so as to ensure that the valve head can retract smoothly under the drilling fluid pressure.

[0027] Preferably, the structures of the non-magnetic tube 1, magnetorheological pulse control unit 3, balance spring base 4, circuit skeleton, and circuit control device set in this application are all existing technologies. The relevant content is directly quoted from the existing literature "Yi Ming, Zhang Lei, Li Fuqiang, et al. Research on magnetorheological fluid negative pulse generator for vertical well drilling skew measurement [J]. Petroleum Machinery, 2023, 51(10): 32-40." The specific structure, parameter dimensions, and other information can be directly referred to the relevant content in the existing literature. It is a direct use of the existing technology without any additional improvements or innovations. Therefore, this part will not be elaborated on further. This application only changes the valve body structure for constructing the branch flow channel to link with the existing magnetorheological pulse control unit 3. When the valve body structure moves to reset with the magnetorheological pulse control unit 3, it can be ventilated. This ensures that when the drilling fluid is diverted in the branch flow channel and negative pulse fluctuations are generated, the branch flow channel with smaller gaps can be kept unobstructed, avoiding blockage and other problems.

[0028] Preferably, the working principle of this application is as follows: During normal drilling, the electromagnetic generator module 34 does not generate a magnetic field, and the magnetorheological fluid exhibits low-viscosity Newtonian fluid characteristics. Affected by the surface drilling pump pressure, the anti-clogging valve body 22 experiences significant drilling fluid pressure and retracts. The drilling fluid balance spring 42 in the drilling fluid pressure balance chamber and the first non-magnetic spring 32 in the magnetorheological fluid chamber are compressed, achieving pressure balance within the tool. During downhole data measurement, the electromagnetic generator module 34 still does not generate a magnetic field, and the magnetorheological fluid remains a low-viscosity Newtonian fluid. After the surface drilling pump is shut down, the drilling fluid pressure decreases, and the anti-clogging valve body 22 rises under restoring force and returns to its initial position. Sensors inside the drilling homing device (inclination angle sensor, temperature sensor, and pressure sensor, etc.) begin measuring real-time downhole data. After data acquisition is complete, the electromagnetic generator module 34 begins to generate a magnetic field, and the magnetorheological fluid instantly changes from a low-viscosity Newtonian fluid to a high-viscosity, low-flow Bingham fluid. When a negative pulse pressure signal is generated, the drilling fluid pressure increases after the surface drilling pump is turned on. The microcontroller on the circuit board, based on the measured real-time downhole data, controls the electromagnetic generation module 34 to be energized or de-energized at regular intervals, causing the magnetorheological fluid to rapidly switch between a low-viscosity Newtonian fluid and a high-viscosity, low-flow Bingham fluid. When the anti-blocking valve body 22 is impacted by the drilling fluid, it will exhibit retraction if the magnetorheological fluid is in a Newtonian fluid state, but will not retract if it is in a Bingham fluid state. By regularly controlling the retraction of the anti-blocking valve body 22 based on real-time downhole data, the throttling area on the surface of the anti-blocking valve body 22 changes periodically, generating a negative pressure pulse signal from the drilling fluid. The throttling area referred to in this application refers to the size of the valve cavity guiding area formed by the anti-blocking valve body 22 during multiple stages of descent at different distances. Therefore, the flow rates of the branch channels at different stages differ, and this, combined with the adjustment of the varying interval duration, generates varying negative pulse fluctuations. The drilling fluid negative pressure pulse signal contains the measured real-time downhole data. This negative pressure pulse signal returns to the surface along with the drilling fluid. The riser pressure analyzer on the surface reads the time interval between each falling edge of the drilling fluid negative pressure pulse signal wave, which is then read and decoded by the lower-level computer. The time interval between the falling edges is a preset multiple of the downhole data. After conversion, the data is transmitted to the upper-level computer for display. This real-time downhole data helps engineers determine the current status and adjust the plan as needed, thereby improving drilling efficiency.

[0029] Preferably, the sensor used for measurement involved in this application can be connected to the circuit control device via wires or wireless transmission to provide downhole data. The sensor is also connected to a power source such as a battery pack via wires to form a closed electrical circuit. The control method in this application is through a controller. The control circuit of the controller, such as a microcontroller, can be implemented by simple programming by those skilled in the art. The provision of power by the battery pack is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features; therefore, the control method and circuit connection will not be explained in detail here.

[0030] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0031] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A mining measurement-while-drilling probe device, comprising a non-magnetic tube (1), characterized in that, The upper axial end of the non-magnetic tube (1) is provided with a screen inlet valve head (2) that can directionally guide drilling fluid in a diversion manner. Inside the non-magnetic tube (1), there is also a magnetorheological pulse control unit (3) that can adjust the conduction state of the filter inlet valve head (2) in coordination with the drilling fluid flow, and at the lower axial end of the magnetorheological pulse control unit (3), there is also a balance spring base (4) that can provide dynamic balance support for it. An anti-clogging valve body (22) capable of changing the conduction state of the filter valve body (21) is movably inserted into the filter valve body (21) of the filter inlet valve head (2). The filter valve body (21) is detachably connected to the non-magnetic tube (1), and the anti-clogging valve body (22) is axially connected to the upper end of the magnetorheological pulse control unit (3) in a manner that can be linked with the magnetorheological pulse control unit (3).

2. The mining MWD drill collar apparatus of claim 1, wherein, The lower axial end of the filter valve housing (21) is connected to a drain sleeve (23) that can be coaxially fitted outside the non-magnetic tube (1) and cooperate with the non-magnetic tube (1) to form an annular chamber for the directional flow of drilling fluid output from the filter valve housing (21).

3. The mining MWD drill collar apparatus of claim 2, wherein, The filter valve housing (21) includes a thick valve seat (211), a valve housing cylinder (212), a filter valve cover (213), and a connecting end (214), wherein, A valve shell (212) is connected to the top end face of the thick valve seat (211), and a connecting end (214) is also connected to its bottom end face. The valve housing (212) is also connected to a screen valve cover (213) that can form an array of mesh-shaped holes for directional input of drilling fluid at its axial upper end away from the thick valve seat (211).

4. The mining MWD drill collar apparatus of claim 3, wherein, A plurality of drainage holes (2111) for drilling fluid to be discharged into the valve shell (212) are provided on the thick valve seat (211) in a circumferentially spaced manner. A centrally located guide hole (2112) is provided on the thick valve seat (211) for inserting the anti-blocking valve body (22). An end face sealing gasket (2113) is also embedded on the bottom surface of the thick valve seat (211).

5. The mining MWD drill collar apparatus of claim 4, wherein, A plurality of liquid inlet holes (2131) are provided on the sloping annular surface of the filter valve cover (213) in a lattice pattern, which can connect the internal cavity of the filter valve shell (21) with the outside. A retrieval ring (215) is also provided at the center of the top surface of the filter valve cover (213).

6. The mining measurement-while-drilling probe device as described in claim 5, characterized in that, The anti-clogging valve body (22) includes a valve head (221), a guide slide (222), and a clearing column (223), wherein, The valve head (221) is vertically and vertically inserted into the inner cavity of the filter valve housing (21) in such a way that it can fit against the lower surface of the filter valve cover (213) to block the liquid inlet hole (2131), and the bottom end of the valve head (221) is connected to a guide slide (222) that is slidably inserted in the central guide hole (2112). On the sloping annular surface of the valve head (221) that matches the lower surface contour of the filter valve cover (213), there is a lattice of a dredging column (223) that can be inserted into the liquid inlet hole (2131).

7. The mining MWD drill collar apparatus of claim 6, wherein, The balance spring base (4) includes a drilling fluid balance spring seat (41) that can divide the cavity of the non-magnetic tube (1), a drilling fluid balance spring (42) connected to the drilling fluid balance spring seat (41), and a sealing end (43) that seals the port of the non-magnetic tube (1) and is connected to the drilling fluid balance spring (42).

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