Gas-liquid two-phase jet flow coal seam anti-reflection and drilling deslagging drilling tool device and system

Abstract

The invention provides a gas-liquid two-phase jet flow coal seam anti-reflection and drilling deslagging drilling tool device and system.The gas-liquid two-phase jet flow coal seam anti-reflection and drilling deslagging drilling tool device comprises a drill bit, a valve body, a nozzle and a valve element, and a liquid injection cavity is formed in the drill bit; the valve body is connected with the drill bit, a liquid converging cavity and a sliding cavity which are communicated with each other are formed in the valve body, a first static pressure through hole and a first high pressure through hole are formed in the side wall of the sliding cavity, the first static pressure through hole and the first high pressure through hole are formed in the extending direction of the sliding cavity in a spaced mode, and the first static pressure through hole is communicated with the liquid injection cavity; the nozzle is arranged on the valve body and provided with a gas channel and a liquid channel which are concentrically arranged, and the first high-pressure through hole is communicated with the liquid channel; the valve element is arranged in the sliding cavity in a sliding mode and provided with a second static pressure through hole and a second high pressure through hole, and the second static pressure through hole and the second high pressure through hole are formed in the extending direction of the sliding cavity in a spaced mode. According to the gas-liquid two-phase jet flow coal seam anti-reflection and drilling deslagging drilling tool device and system, the efficiency and effect of coal seam drilling and anti-reflection operation can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device and system. Background Art

[0002] In the coal mining industry, coal seam permeability enhancement and drilling slag removal technologies mainly rely on gas-liquid two-phase jet devices, which mix gas and liquid in the same channel and spray them out at high speed, using the impact force of high-pressure jets to achieve coal seam permeability enhancement and slag removal operations in the borehole. In related technologies, the gas-liquid two-phase jet coal seam permeability enhancement and drilling slag removal drill tool device cannot adjust the injection state of the gas-liquid two-phase according to the specific usage scenario, resulting in low operating efficiency, unable to give full play to the permeability enhancement and slag removal potential of the gas-liquid two-phase jet, and difficult to adapt to the complex and changeable coal seam geological conditions. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] In the related technologies, the gas-liquid two-phase jet coal seam permeability enhancement and drilling slag removal drilling equipment usually adopts a fixed gas-liquid mixing and injection structure, lacking a flexible control mechanism. During the operation, the operator cannot accurately adjust the gas-liquid two-phase injection state according to the specific geological conditions of the coal seam, the depth of the borehole, and the requirements of operating efficiency. It is difficult to adapt to the complex and changeable coal seam geological conditions, and the operating efficiency is low. Moreover, under the complex and changeable coal seam geological conditions, the fixed injection state may not be able to adapt to the physical characteristics and crushing requirements of different coal seams, resulting in poor coal seam permeability enhancement effect, incomplete drilling slag removal, and even causing safety hazards such as drilling collapse.

[0005] To this end, an embodiment of the present invention proposes a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device, and the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device comprises:

[0006] A drill bit, wherein a liquid injection cavity is provided in the drill bit;

[0007] a valve body, the valve body being connected to the drill bit, the valve body being provided with a liquid confluence cavity and a sliding cavity being connected to each other, a first static pressure through hole and a first high pressure through hole being provided on a side wall of the sliding cavity, the first static pressure through hole and the first high pressure through hole being arranged at intervals in an extending direction of the sliding cavity, and the first static pressure through hole being connected to the liquid injection cavity;

[0008] A nozzle, the nozzle is arranged on the valve body, the nozzle has a gas channel and a liquid channel arranged concentrically, and the first high-pressure through hole is connected to the liquid channel;

[0009] A valve core, wherein the valve core is slidably arranged in the sliding cavity, the valve core has a second static pressure through hole and a second high pressure through hole, the second static pressure through hole and the second high pressure through hole are arranged at intervals in the extension direction of the sliding cavity, the valve core has a first position and a second position in the sliding cavity, when in the first position, the first static pressure through hole and the second static pressure through hole are connected to allow liquid to flow into the injection cavity through the liquid confluence cavity; when in the second position, the first high pressure through hole and the second high pressure through hole are connected to allow liquid to flow into the nozzle through the liquid confluence cavity.

[0010] In summary, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drill tool device provided in the embodiment of the present invention can adjust the position of the valve core according to the needs, realize multiple functions such as drill bit wetting, punching and deslagging, and significantly improve the efficiency and effect of coal seam drilling and permeability enhancement operations.

[0011] In some embodiments, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device also includes an elastic member and a plug. The plug is arranged at one end of the sliding cavity away from the liquid confluence cavity, and the elastic member is arranged in the sliding cavity. The two ends of the elastic member are correspondingly connected to the valve core and the plug. When the liquid pressure in the liquid confluence cavity increases, the liquid in the liquid confluence cavity pushes the valve core to move from the first position to the second position.

[0012] In some embodiments, the nozzle is disposed on a side wall of the valve body, and a straight line where an injection direction of the nozzle is located intersects with a straight line where a drilling direction of the drill bit is located.

[0013] In some embodiments, the valve body includes an outer tube and an inner tube which are connected to each other, a gas merging chamber is provided between the outer tube and the inner tube, the gas merging chamber is connected to the gas channel, and the liquid merging chamber is provided in the inner tube.

[0014] In some embodiments, the valve body is provided with a connected expansion channel and a reduction channel, the expansion channel is connected to the second static pressure through hole, the reduction channel is connected to the injection cavity, and the flow cross-sectional area of ​​the reduction channel is smaller than the flow cross-sectional area of ​​the expansion channel.

[0015] In some embodiments, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device also includes a drill rod and a rotating water braid, and the rotating water braid, the drill rod and the valve body are sequentially connected by threads.

[0016] In some embodiments, the rotating water braid includes a fixed body, a rotating body and a sealing assembly, the fixed body and the rotating body are rotatably connected, the fixed body is provided with a first groove, the rotating body is provided with a second groove matching the first groove, the first groove and the second groove are combined to form a accommodating cavity, and the sealing assembly is arranged in the accommodating cavity.

[0017] In some embodiments, the sealing assembly includes an elastomer, a gasket and a sealing ring, wherein the sealing ring, the elastomer and the gasket are arranged in sequence along the flow direction of the gas, and two ends of the elastomer are correspondingly connected to the sealing ring and the gasket.

[0018] In some embodiments, a first protrusion and a first groove are provided on the outer wall of the fixed body, and a second protrusion and a second groove are provided on the inner wall of the rotating body, the first protrusion is correspondingly snapped into the first groove, and the second protrusion is correspondingly snapped into the second groove;

[0019] And / or, the rotary water braid, the drill pipe and the valve body are arranged to be connected by a tapered thread.

[0020] In addition, an embodiment of the present invention also provides a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drill tool system, which includes a gas supply device, a liquid supply device and the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drill tool device described in the above embodiment, the gas supply device is connected to the gas channel, and the liquid supply device is connected to the liquid confluence chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device in one embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a valve body, a nozzle and a valve core in a first position in a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device in one embodiment of the present invention.

[0023] Figure 3 It is a structural schematic diagram of a valve body, a nozzle and a valve core in a second position in a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device in one embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a valve body in a gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device in one embodiment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of a rotating water braid in a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device in one embodiment of the present invention.

[0026] Figure 6It is a schematic structural diagram of a drill rod in a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device in one embodiment of the present invention.

[0027] Reference numerals: 100, gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device;

[0028] 10. Drill bit; 11. Liquid injection chamber;

[0029] 20. Valve body; 21. Liquid confluence chamber; 22. Sliding chamber; 221. First static pressure through hole; 222. First high pressure through hole; 23. Inner tube; 24. Outer tube; 25. Gas confluence chamber; 26. Diameter expansion channel; 27. Diameter reduction channel;

[0030] 30. Nozzle; 31. Gas channel; 32. Liquid channel;

[0031] 40. valve core; 41. second static pressure through hole; 42. second high pressure through hole; 43. hollow cavity; 431. open mouth; 45. elastic member; 46. plug; 47. anti-collision pad;

[0032] 50, drill pipe; 51, inner tube; 52, outer tube;

[0033] 60. Rotating water braid; 61. Fixed body; 611. First groove; 612. First protrusion; 613. First groove; 62. Rotating body; 621. Second groove; 622. Second protrusion; 623. Second groove; 63. Sealing assembly; 631. Elastomer; 632. Spacer; 633. Sealing ring; 64. Accommodating cavity; 65. Sealing column. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 6As shown, an embodiment of the present invention provides a gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device 100, which includes a drill bit 10, a valve body 20, a nozzle 30 and a valve core 40. The drill bit 10 is provided with a liquid injection chamber 11, the valve body 20 is connected to the drill bit 10, and the valve body 20 is provided with a liquid converging chamber 21 and a sliding chamber 22 that are connected. The side wall of the sliding chamber 22 is provided with a first static pressure through hole 221 and a first high pressure through hole 222. The first static pressure through hole 221 and the first high pressure through hole 222 are arranged at intervals in the extension direction of the sliding chamber 22, and the first static pressure through hole 221 is connected to the liquid injection chamber 11; the nozzle 30 is arranged on the valve body 2 0, the nozzle 30 has a gas channel 31 and a liquid channel 32 which are arranged concentrically, and the first high-pressure through hole 222 is connected to the liquid channel 32; the valve core 40 is slidably arranged in the sliding chamber 22, and the valve core 40 has a second static pressure through hole 41 and a second high-pressure through hole 42, and the second static pressure through hole 41 and the second high-pressure through hole 42 are arranged at intervals in the extension direction of the sliding chamber 22, and the valve core 40 has a first position and a second position in the sliding chamber 22, and the first static pressure through hole 221 and the second static pressure through hole 41 are connected to allow liquid to flow into the injection chamber 11 through the liquid confluence chamber 21; in the second position, the first high-pressure through hole 222 and the second high-pressure through hole 42 allow liquid to flow into the nozzle 30 through the liquid confluence chamber 21.

[0036] Specifically, a hollow cavity 43 is provided in the valve core 40, and the second static pressure through hole 41 and the second high pressure through hole 42 are provided on the side wall of the hollow cavity 43, and an opening 431 is provided at one end of the hollow cavity 43, so that the liquid in the liquid converging cavity 21 can enter the hollow cavity 43 through the opening 431, and then flow to the first static pressure through hole 221 and the second high pressure through hole 42. When the valve core 40 is in the first position, the first static pressure through hole 221 and the second static pressure through hole 41 are connected, and the first high pressure through hole 222 and the second high pressure through hole 42 are arranged in a staggered manner, so that the liquid in the liquid converging cavity 21 flows to the injection cavity 11 in the drill bit 10 only through the first static pressure through hole 221 and the second static pressure through hole 41. When the valve core 40 is in the second position, the first high-pressure through hole 222 and the second high-pressure through hole 42 are connected, and the first static pressure through hole 221 and the second static pressure through hole 41 are staggered, so that the liquid in the liquid converging chamber 21 flows to the liquid channel 32 of the nozzle 30 only through the first high-pressure through hole 222 and the second high-pressure through hole 42.

[0037] Among them, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device 100 can be connected to an external gas supply device and a liquid supply device, and provide liquid and gas to the liquid confluence chamber 21 and the gas channel 31 respectively. During the drilling process of the drill bit 10, the valve core 40 can be located at the first position of the sliding chamber 22, and the liquid in the liquid confluence chamber 21 can be injected into the liquid injection chamber 11 in the drill bit 10 through the second static pressure through hole 41 and the first static pressure through hole 221 in sequence, which can wet the drill bit 10 and improve the drilling efficiency.

[0038] When the drill bit 10 completes drilling or reaches the designated coal seam position, the valve core 40 can be moved from the first position to the second position, and the liquid in the liquid confluence chamber 21 can be injected into the liquid channel 32 in the nozzle 30 through the second high-pressure through hole 42 and the first high-pressure through hole 222 in sequence. The gas supply device can provide gas through the gas channel 31. The gas and liquid in the nozzle 30 can converge at the ends of the gas channel 31 and the liquid channel 32, and be sprayed toward the hole wall drilled by the drill bit 10, thereby effectively increasing the permeability of the coal seam and achieving efficient completion of the punching operation.

[0039] After the punching operation is completed, the supply of liquid to the liquid confluence chamber 21 can be stopped, and the gas supply to the gas channel 31 can be increased, so that the gas enters the borehole drilled by the drill bit 10 through the gas channel 31, and the powerful kinetic energy of the gas is used to effectively remove the coal slag accumulated in the borehole, creating a cleaner and smoother working environment for subsequent operations.

[0040] In summary, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drill device 100 provided in the embodiment of the present invention can adjust the position of the valve core 40 according to the needs, realize multiple functions such as wetting, punching and deslagging of the drill bit 10, and significantly improve the efficiency and effect of coal seam drilling and permeability enhancement operations.

[0041] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device 100 also includes an elastic member 45 and a plug 46. The plug 46 is arranged at one end of the sliding cavity 22 away from the liquid confluence cavity 21. The elastic member 45 is arranged in the sliding cavity 22. The two ends of the elastic member 45 are correspondingly connected to the valve core 40 and the plug 46. When the liquid pressure in the liquid confluence cavity 21 increases, the liquid in the liquid confluence cavity 21 pushes the valve core 40 to move from the first position to the second position.

[0042] Specifically, the plug 46 is disposed at one end of the sliding cavity 22 away from the liquid confluence cavity 21, and effectively closes the sliding cavity 22, thereby accurately controlling the movement range of the valve core 40 in the sliding cavity 22, preventing the valve core 40 from exceeding the preset movement limit under the push of high-pressure liquid, and ensuring the stable operation of the entire device. At the same time, the presence of the plug 46 also effectively prevents liquid from leaking from the end of the sliding cavity 22, maintaining the liquid pressure balance and clean working environment inside the device.

[0043] During the operation of the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device 100, when the liquid pressure in the liquid confluence chamber 21 gradually increases, the force exerted by the liquid on the valve core 40 also gradually increases, so as to push the valve core 40 to move from the first position to the second position along the sliding chamber 22, and at the same time, the deformation amount of the elastic member 45 increases. When the liquid pressure in the liquid confluence chamber 21 gradually decreases, the force exerted by the liquid on the valve core 40 will also gradually decrease, and the valve core 40 moves from the second position to the first position under the elastic restoring force of the elastic member 45.

[0044] This design makes it extremely easy to adjust the position of the valve core 40. By simply controlling the liquid pressure in the liquid confluence chamber 21, the direction of liquid flow can be flexibly changed. This control method not only improves the automation of the device, but also reduces the difficulty of operation, so that the gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device 100 can play a more outstanding performance in coal seam permeability enhancement operations. In this embodiment, the elastic member 45 can be set as a spring or a rubber elastic body 631 and other components. The plug 46 is set as a T-shaped member.

[0045] Furthermore, in the drilling direction of the drill bit 10, the first static pressure through hole 221 is arranged close to the drill bit 10 relative to the second static pressure through hole 41. That is, in the drilling direction of the drill bit 10, the liquid in the liquid confluence chamber 21 can push the valve core 40 to move toward the drill bit 10, making the structure of the entire device more reasonable, the regulation more convenient, and the response speed of the device can also be improved.

[0046] Furthermore, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device 100 also includes an anti-collision pad 47, which is arranged at the end of the valve core 40 away from the elastic member 45. When the valve core 40 moves toward the second position, the anti-collision pad 47 plays a role of buffering and shock absorption to avoid violent collision.

[0047] like Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, the anti-collision pad 47 is generally made of a material with high elasticity, wear resistance and low friction coefficient, such as rubber, polyurethane or special synthetic materials, etc. These materials can effectively absorb the impact energy during the movement of the valve core 40 and convert it into heat energy or other forms of energy dissipation, thereby significantly reducing the collision force and frequency between the valve core 40 and the inner wall of the sliding cavity 22.

[0048] It should be noted that sealing rings are provided at the connections between the valve core 40, the valve body 20 and the plug 46 to ensure stable operation under high pressure working environment and avoid performance degradation or safety hazards caused by liquid leakage. At the same time, the sealing rings also help reduce friction and wear at the connection, extending the service life of the valve core 40, the valve body 20 and the plug 46.

[0049] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the nozzle 30 is arranged on the side wall of the valve body 20, and the straight line where the nozzle 30 is sprayed is staggered with the straight line where the drilling direction of the drill bit 10 is located. In other words, the gas-liquid mixed fluid or gas can be more evenly distributed in the borehole, thereby effectively improving the working efficiency. In the punching operation, this spraying method helps to break and cut the coal seam faster, making the drilling work smoother. In the slag removal operation, the sprayed fluid or gas can generate a strong flushing force to quickly discharge impurities such as coal dust and rock dust in the borehole, avoiding the risk of blockage of the borehole. In this embodiment, the straight line where the nozzle 30 is sprayed is perpendicular to the drilling direction of the drill bit 10. In other words, the spray direction of the nozzle 30 is consistent with the radial direction of the borehole.

[0050] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the valve body 20 includes an outer tube 24 and an inner tube 23 which are connected to each other, a gas confluence chamber 25 is provided between the outer tube 24 and the inner tube 23, the gas confluence chamber 25 is connected to the gas channel 31, and the liquid confluence chamber 21 is provided in the inner tube 23, so that the gas in the gas confluence chamber 25 is annularly wrapped on the outer side of the inner tube 23, thereby achieving effective isolation and independent control of the gas and liquid. This design not only improves the overall performance and reliability of the valve body 20, but also makes the overall structure more compact and reasonable, providing strong support for the efficient and safe operation of coal seam permeability enhancement and the like.

[0051] like Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the valve body 20 is provided with a communicating enlarged diameter channel 26 and a reduced diameter channel 27, the enlarged diameter channel 26 is connected to the second static pressure through hole 41, and the reduced diameter channel is connected to the injection cavity 11, and the flow cross-sectional area of ​​the reduced diameter channel is smaller than the flow cross-sectional area of ​​the enlarged diameter channel 26, which not only realizes efficient transmission and precise control of the fluid, but also significantly improves the overall performance of the valve body 20. In this embodiment, the enlarged diameter channel 26 and the reduced diameter channel 27 are both arranged between the inner tube 23 and the outer tube 24.

[0052] Specifically, the expanding channel 26 is closely connected to the second static pressure through hole 41, so that the high-pressure fluid from the outside can directly and efficiently enter the expanding channel 26. The flow cross-sectional area of ​​the expanding channel 26 is relatively large. Such a design is not only conducive to increasing the flow volume of the fluid, but also effectively reduces the flow velocity of the fluid in the channel, thereby further reducing pressure loss and energy consumption. Connected to the expanding channel 26 is the reducing channel 27, and the design of this channel pays more attention to the precise control of fluid flow and pressure. The flow cross-sectional area of ​​the reducing channel 27 is significantly smaller than that of the expanding channel 26. Such a design makes the flow velocity of the fluid through the reducing channel 27 significantly improved, and the fluid pressure will also increase accordingly. This increase in pressure helps to push the fluid into the subsequent injection cavity 11 more effectively, thereby ensuring that the fluid can be supplied to the working area in a stable and high-pressure state.

[0053] like Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments, the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device 100 further includes a drill pipe 50 and a rotating water braid 60, and the rotating water braid 60, the drill pipe 50 and the valve body 20 are sequentially connected by threads. The rotating water braid 60 can be connected to the liquid supply device and the gas supply device, and the two ends of the drill pipe 50 are correspondingly connected to the rotating water braid 60 and the valve body 20, so that the gas and liquid are transported to the nozzle 30 and the drill bit 10.

[0054] Specifically, the rotating water braid 60 can not only efficiently transmit the gas-liquid two-phase fluid to the front end of the drill rod 50, but also realize its own rotation during the drilling process to better adapt to the complex terrain and drilling requirements of the coal seam. The threaded connection between the rotating water braid 60 and the drill rod 50 also ensures a close fit and stable transmission between the two.

[0055] In this embodiment, the rotating water braid 60 and the drill rod 50 both adopt double-layer tubes, that is, the rotating water braid 60 and the drill rod 50 both include an inner tube 51 and an outer tube 52. The liquid flows through the inner tube 51 to the liquid confluence chamber 21 of the valve body 20, and the gas flows through the gap between the inner tube 51 and the outer tube 52 into the gas confluence chamber 25.

[0056] Furthermore, the rotary water braid 60, the drill pipe 50 and the valve body 20 are connected by a tapered thread, so that the connection parts can generate a larger and larger pre-tightening force during the rotation and tightening process, thereby achieving a more secure connection effect. Compared with the traditional straight thread connection, this connection method has higher sealing and anti-loosening performance, and can maintain a stable connection state even in the process of high-pressure and high-speed fluid transmission.

[0057] like Figure 5 As shown, in some embodiments, the rotating water braid 60 includes a fixed body 61, a rotating body 62 and a sealing assembly 63. The fixed body 61 and the rotating body 62 are rotatably connected. The fixed body 61 is provided with a first groove 611, and the rotating body 62 is provided with a second groove 621 matching the first groove 611. The first groove 611 and the second groove 621 are combined to form a receiving cavity 64, and the sealing assembly 63 is arranged in the receiving cavity 64.

[0058] Specifically, the fixed body 61 is the static part of the rotating water braid 60, which can be connected to the air supply device and the liquid supply device. The rotating body 62 is the dynamic part of the rotating water braid 60, which can realize free rotation during the drilling process to adapt to the complex terrain of the coal seam. The second groove 621 provided on the rotating body 62 perfectly matches the first groove 611 on the fixed body 61, and the two are assembled to form a complete accommodating chamber 64. This accommodating chamber 64 not only provides an installation space for the sealing component 63, but also ensures the stability and sealing of the fluid during the transmission process. The sealing component 63 is carefully installed in the accommodating chamber 64 formed by the fixed body 61 and the rotating body 62. It can effectively prevent leakage and contamination of the fluid during the transmission process, and ensure that the fluid can reach the working area in the best state. At the same time, the sealing component 63 also has excellent properties such as wear resistance and high temperature resistance, and can operate stably for a long time in harsh working environments. In addition, the rotating water braid further comprises a blocking column 65, which can block part of the gap between the inner tube and the outer tube of the fixed body so that the gap can be connected to the air supply device.

[0059] Furthermore, the sealing assembly 63 includes an elastic body 631, a cushion block 632 and a sealing ring 633. The sealing ring 633, the elastic body 631 and the cushion block 632 are sequentially arranged along the flow direction of the gas, and the two ends of the elastic body 631 are correspondingly connected to the sealing ring 633 and the cushion block 632. The three parts of the elastic body 631, the cushion block 632 and the sealing ring 633 cooperate with each other to form an efficient and reliable sealing system, which not only improves the sealing and stability of fluid transmission, but also reduces the safety hazards and operating costs caused by leakage.

[0060] Among them, the elastic body 631 has excellent elasticity and wear resistance, and can maintain a stable sealing effect during high-pressure and high-speed fluid transmission. At the same time, the two ends of the elastic body 631 are respectively connected to the sealing ring 633 and the pad 632 to form a complete sealing chain, ensuring that there is no leakage of the fluid during the transmission process.

[0061] The pad 632 is a supporting component of the elastomer 631 and can withstand the huge pressure and vibration during the drilling process. At the same time, it can also provide necessary support and fixation for the elastomer 631 to prevent the elastomer 631 from deforming or falling off under the action of high-pressure fluid.

[0062] The sealing ring 633 fits tightly on the contact surface of the rotating body 62 and the fixed body 61, forming an effective sealing barrier. The design of the sealing ring 633 fully considers the requirements of sealing and wear resistance, and adopts high-quality materials and advanced manufacturing technology to ensure its stability and reliability during long-term operation.

[0063] Furthermore, the outer wall of the fixed body 61 is provided with a first protrusion 612 and a first groove 613 at intervals, and the inner wall of the rotating body 62 is provided with a second protrusion 622 and a second groove 623 at intervals, and the first protrusion 612 is correspondingly snapped into the first groove 613, and the second protrusion 622 is correspondingly snapped into the second groove 623. It should be noted that the first protrusion 612, the first groove 613, the second protrusion 622 and the second groove 623 are correspondingly provided on the inner tube 51 and the outer tube 52 of the rotating water braid 60, which together constitute an efficient, stable and durable connection system.

[0064] Among them, when the rotating body 62 and the fixed body 61 are assembled, the first protrusion 612 will be accurately snapped into the first groove 613, and the second protrusion 622 will also be correspondingly snapped into the second groove 623, which not only ensures the close fit between the rotating body 62 and the fixed body 61, but also greatly improves the stability and firmness of the connection.

[0065] Moreover, the design of the first protrusion 612, the first groove 613, the second protrusion 622 and the second groove 623 can form a certain limiting effect between the rotating body 62 and the fixed body 61, thereby effectively preventing the rotating body 62 from excessively rotating or shaking during the drilling process, which not only improves the accuracy and efficiency of the drilling operation, but also reduces the safety hazards caused by the instability of the rotating body 62.

[0066] like Figure 1 , Figure 5 and Figure 6As shown, in this embodiment, the connection between the rotary water braid 60, the drill pipe 50 and the valve body 20 is provided with a sealing groove, and the sealing groove can be filled with a sealing component, such as a sealing ring, an O-ring, etc., so that a tight sealing barrier can be formed at the connection, effectively preventing leakage of the fluid during the transmission process. It should be noted that the various sealing rings in the embodiments of the present invention can be selected from different materials and sizes according to needs, and will not be described one by one here.

[0067] In addition, an embodiment of the present invention further provides a gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool system, which includes a gas supply device, a liquid supply device and a gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device 100 provided in the above embodiment, wherein the gas supply device is connected to the gas channel 31, and the liquid supply device is connected to the liquid confluence chamber 21, forming a powerful and stable coal seam permeability enhancement solution. This system can not only significantly improve the permeability of coal seams, but also reduce energy consumption and operating costs, injecting new vitality into the sustainable development of the coal seam mining industry.

[0068] It should be noted that the beneficial effects that can be achieved by the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drill tool system can be referred to the corresponding beneficial effects of the gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drill tool device provided above, and will not be repeated here.

[0069] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the present invention, the terms "one embodiment", "some embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0074] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device, characterized in that: include: A drill bit, wherein a liquid injection cavity is provided in the drill bit; a valve body, the valve body being connected to the drill bit, the valve body being provided with a liquid confluence cavity and a sliding cavity being connected to each other, a first static pressure through hole and a first high pressure through hole being provided on a side wall of the sliding cavity, the first static pressure through hole and the first high pressure through hole being arranged at intervals in an extending direction of the sliding cavity, and the first static pressure through hole being connected to the liquid injection cavity; A nozzle, the nozzle is arranged on the valve body, the nozzle has a gas channel and a liquid channel arranged concentrically, and the first high-pressure through hole is connected to the liquid channel; A valve core, wherein the valve core is slidably arranged in the sliding cavity, the valve core has a second static pressure through hole and a second high pressure through hole, the second static pressure through hole and the second high pressure through hole are arranged at intervals in the extension direction of the sliding cavity, the valve core has a first position and a second position in the sliding cavity, when in the first position, the first static pressure through hole and the second static pressure through hole are connected to allow liquid to flow into the injection cavity through the liquid confluence cavity; when in the second position, the first high pressure through hole and the second high pressure through hole are connected to allow liquid to flow into the nozzle through the liquid confluence cavity.

2. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device according to claim 1 is characterized in that: It also includes an elastic member and a plug, wherein the plug is arranged at one end of the sliding cavity away from the liquid merging cavity, and the elastic member is arranged in the sliding cavity. Both ends of the elastic member are correspondingly connected to the valve core and the plug. When the liquid pressure in the liquid merging cavity increases, the liquid in the liquid merging cavity pushes the valve core to move from the first position to the second position.

3. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device according to claim 1 is characterized in that: The nozzle is arranged on the side wall of the valve body, and the straight line where the spraying direction of the nozzle is located is staggered with the straight line where the drilling direction of the drill bit is located.

4. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device according to claim 1 is characterized in that: The valve body comprises an outer tube and an inner tube which are connected with each other. A gas confluence cavity is arranged between the outer tube and the inner tube. The gas confluence cavity is connected with the gas channel. The liquid confluence cavity is arranged in the inner tube.

5. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device according to claim 4 is characterized in that: The valve body is provided with an expanding channel and a reducing channel which are connected to each other. The expanding channel is connected to the second static pressure through hole, and the reducing channel is connected to the injection cavity. The flow cross-sectional area of ​​the reducing channel is smaller than the flow cross-sectional area of ​​the expanding channel.

6. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and deslagging drilling tool device according to claim 1 is characterized in that: It also includes a drill rod and a rotating water braid, wherein the rotating water braid, the drill rod and the valve body are connected in sequence through threads.

7. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device according to claim 6 is characterized in that: The rotating water braid includes a fixed body, a rotating body and a sealing assembly. The fixed body and the rotating body are rotatably connected. The fixed body is provided with a first groove, and the rotating body is provided with a second groove matching the first groove. The first groove and the second groove are combined to form an accommodating cavity, and the sealing assembly is arranged in the accommodating cavity.

8. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device according to claim 7 is characterized in that: The sealing assembly comprises an elastomer, a gasket and a sealing ring. The sealing ring, the elastomer and the gasket are arranged in sequence along the flow direction of the gas. Two ends of the elastomer are correspondingly connected to the sealing ring and the gasket.

9. The gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device according to claim 7, characterized in that: The outer wall of the fixed body is provided with a first protrusion and a first groove at intervals, and the inner wall of the rotating body is provided with a second protrusion and a second groove at intervals, the first protrusion is correspondingly snapped into the first groove, and the second protrusion is correspondingly snapped into the second groove; And / or, the rotary water braid, the drill pipe and the valve body are arranged to be connected by a tapered thread.

10. A gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool system, characterized in that: It comprises an air supply device, a liquid supply device and a gas-liquid two-phase jet coal seam permeability enhancement and drilling and slag removal drilling tool device as described in any one of claims 1 to 9, wherein the air supply device is connected to the gas channel, and the liquid supply device is connected to the liquid confluence chamber.

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