Integrated hydraulic cave-making and spray-eliminating device for outburst coal seam crossing and drilling and use working condition thereof

Abstract

The invention discloses an outburst coal seam crossing and drilling integrated hydraulic cave-making spray eliminating device and a using working condition of the outburst coal seam crossing and drilling integrated hydraulic cave-making spray eliminating device. The spray eliminating device comprises a multifunctional spray eliminating pipe body, and the two ends of the multifunctional spray eliminating pipe body are connected with a double-channel uncovering drill bit and a double-channel drill rod correspondingly; a flow control inner pipe assembly close to one side of the double-channel drill rod and a short pipe assembly close to one side of the double-channel uncovering drill bit are arranged in the multifunctional spray eliminating pipe body. The device disclosed by the invention has the beneficial effects that the device is used for discharging gas in a loose hole gas bag during drilling of a coal hole section of a crossing hole and hydraulic caving, so that the risk that gas in a spray hole exceeds the limit during drilling of the coal hole section and hydraulic caving is eliminated; after the hydraulic caving of the coal hole section is finished, an exhaust screen pipe is implanted through an exhaust pipe implanting channel before drill retreating, and gas in a hole loosening gas bag is discharged by means of the exhaust screen pipe, so that the orifice gas over-limit risk in the drill retreating process and the delayed orifice gas over-limit risk after drill retreating are eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of gas extraction drilling, permeability enhancement and blowout prevention in a protruding coal seam, and in particular to an integrated hydraulic cavitation blowout suppressor for drilling through a protruding coal seam and its use conditions. Background Art

[0002] The through-layer drilling of the protruding coal seam is a common drilling for gas extraction in protruding coal seams. Through-layer drilling is used to construct through-layer drilling holes in the area to be excavated or mined in the protruding coal seam, and hydraulic punching and hole-making are carried out in the coal hole section of the through-layer drilling hole to increase permeability. This is one of the main means of increasing permeability for gas extraction in protruding coal seams. In order to prevent the gas from exceeding the limit in the through-layer drilling hole, the traditional practice is to install a blowout prevention hole system composed of a tee, a hose, a box, an air bag, etc. at the hole mouth to avoid the gas generated by the blowout hole from overflowing into the tunnel space as much as possible, so as to prevent the occurrence of gas exceeding the limit in the blowout hole. The existing off-hole blowout prevention system can cope with most blowout phenomena and avoid the occurrence of blowout gas exceeding the limit accidents. However, it is still difficult to avoid blowout gas exceeding the limit in the gas abnormal zone. The blowout in the gas abnormal zone is violent. The severe blowout phenomenon will cause three-way leakage, hose detachment, hose thread drawing, box damage, airbag rupture and other destructive phenomena, which will lead to blowout gas exceeding the limit accidents. In addition, the existing off-hole blowout prevention system does not work for delayed blowout after drilling back, and the scale and harm of delayed blowout are greater. There are cases showing that delayed blowout can spray tens of tons or even hundreds of tons of coal slag and thousands of cubic meters or even tens of thousands of cubic meters of gas in a very short period of time.

[0003] In order to solve the problem of blowholes in drilling holes through gas-abnormal zones in coal seams, the applicant has conducted a lot of theoretical explorations. In order to reveal the blowhole mechanism of gas-abnormal zones and scientifically explain the blowhole phenomenon, the applicant has proposed three new concepts, namely "loose hole gas bag", "restricted protrusion" and "gas blocking plug", referred to as the "loose hole gas bag sudden blockage hypothesis", and has drawn two important inferences: First, if the gas blocking effect of the "gas blocking plug" of the borehole can be eliminated, the energy gathering and pressure-raising trend of the "loose hole gas bag" can be blocked, thereby eliminating the risk of gas exceeding the limit in the blowhole; Second, the design and invention of the dual-channel drilling tool can eliminate the gas blocking effect of the "gas blocking plug" of the borehole throughout the entire process, that is, the drilling tool has the function of gas drainage while drilling, which eliminates the risk of blowholes during hydraulic punching and hole making, referred to as "blowout elimination while drilling", and the drilling tool has the function of planting a pipe while drilling to implant a gas screen before withdrawing the drill, which eliminates the risk of blowholes during and after withdrawing the drill, referred to as "planting a pipe to eliminate blowout".

[0004] In order to realize the above-mentioned anti-blowout hole method relying on the structural characteristics of the drilling tool, the applicant has applied for a number of related patents, mainly including "Through-layer drilling extraction drilling tool and anti-blowout hole gas extraction method while drilling" (application number CN2022102513533.3), "Through-layer drilling ring flow supply self-cleaning and plugging split-type bottom hole extraction and blowout prevention drilling tool" (application number CN202310838603.8), "Protruding coal seam through-layer drilling hydraulic cavitation and active blowout prevention integrated drilling tool" (application number CN202310838603.9). 02410340447.7), "Through-layer drilling ring supply flow self-cleaning and plugging integrated bottom hole extraction and blowout prevention drill tool" (application number CN202310830514.9) and the matching special drill rod "High-pressure sealing while-drilling gas extraction drill rod for protruding coal seam through-layer drilling" (application number CN202310651841.8). The first three patents involve hydraulic cavitation jet control valves, air intake and exhaust blowout prevention units and other issues. During the trial production and implementation process, the following defects still exist: First, the sliding part in the sliding valve assembly in the aforementioned invention slides along the inner wall of the multifunctional pipe body, and the inner wall of the multifunctional pipe body cannot be chrome-plated for rust prevention. The inner diameter of the multifunctional pipe body is narrow, and the spraying for rust prevention cannot be used. Therefore, the multifunctional pipe body needs to be made of high-strength and high-quality stainless steel (P550). There is no universal pipe material for high-strength and high-quality stainless steel, and customized processing rods are required. This results in complicated processing technology and high processing cost for the cavitation spray suppressor.

[0005] Second, the exhaust and inlet and outlet blowdown elimination units of the hole-making blowdown elimination device have three types of channels, namely, the exhaust pipe channel at the axial center position, multiple flow supply channels at the axial edge position, and multiple radial air inlet channels. In the aforementioned invention, a cross-border pipe is used to pass through the multifunctional pipe body, the intermediate flow support pipe and the thin-walled inner pipe, which results in a complicated assembly process of the exhaust and inlet blowdown elimination unit and great difficulty in sealing, and also affects the strength of the hole-making blowdown elimination device.

[0006] Third, a flushing and anti-blocking system is arranged inside the wall of the multifunctional pipe body of the hole-making spray suppressor, which is used to flush the sieve hole air inlet plate to prevent the sieve hole air inlet plate from being blocked by coal slag and losing the air intake function. In order to prevent the flushing flow channel of the flushing and anti-blocking system from being blocked, a filter is arranged at the inlet end of the cleaning flow channel. The problem is: whether the filter is blocked is difficult to detect and difficult to replace. Summary of the invention

[0007] The purpose of the present invention is to propose an integrated hydraulic cavitation blowout suppressor for drilling through coal seams and its use conditions. In view of the problems existing in the prior art, a hole top blowout suppressor drill tool connected to the top of the borehole and the drilling gas extraction drill rod is systematically designed.

[0008] To achieve the above object, the present invention adopts the following technical solutions: An integrated hydraulic hole-making blowout suppressor for drilling through a protruding coal seam comprises a multifunctional blowout suppressor pipe body, both ends of which are respectively connected to a double-channel open-cover drill bit and a double-channel drill rod, and a flow control inner pipe assembly close to one side of the double-channel drill rod and a short pipe assembly close to one side of the double-channel open-cover drill bit are respectively arranged in the multifunctional blowout suppressor pipe body; The annular space between the inner wall of the multifunctional blowout suppressor pipe body and the outer walls of the flow control inner pipe assembly and the short pipe assembly is a flow supply channel flowing along the dual-channel drill pipe to the dual-channel open-cover drill bit, and the inner diameter center hole of the multifunctional blowout suppressor pipe body, the flow control inner pipe assembly and the short pipe assembly forms an exhaust pipe channel flowing along the dual-channel open-cover drill bit to the dual-channel drill pipe; The flow supply channel is also connected to a flushing and anti-blocking system.

[0009] Furthermore, flushing and drainage holes and jet nozzles are respectively arranged on the pipe wall of the multifunctional spray-extinguishing pipe body along the flow direction of the flow supply channel, radial flow rings and bidirectional limit rings are respectively arranged on the inner wall of the multifunctional spray-extinguishing pipe body along the flow direction of the flow supply channel, and radial air inlet holes and axial flow holes are also arranged in the middle of the multifunctional spray-extinguishing pipe body; The radial flow ring is provided with a first radial flow hole connected with the jet nozzle and a second radial flow hole connected with the flushing and drainage hole.

[0010] Furthermore, a connecting hole is provided on the side wall of the flushing and drainage hole, and the connecting hole is connected to the gland groove through the buried pipe groove; The flushing and anti-blocking system includes a capillary tube installed in the buried pipe groove and a sieve hole air inlet plate flushed by the medium in the capillary tube, one end of the capillary tube is connected to the connecting hole, and the other end of the capillary tube is connected to the check block, and the check block is installed on the gland groove through a gland; A filter mesh and a mesh thread cover are installed in the flushing and drainage hole.

[0011] Furthermore, the check block has an insertion hole for inserting the capillary tube and a check lip for preventing the coal slag from flowing back into the capillary tube. The check lip is provided with diverter concave and convex edges for dispersing the medium in the capillary tube.

[0012] Furthermore, the flow control inner tube assembly includes a chrome-plated exhaust pipe, on which are sequentially provided a sealing ring for isolating a flow supply channel and an exhaust pipe channel, a first support ring installed and matched with the inner wall of the multifunctional spray nozzle body, a flow control slide valve and a check slide valve.

[0013] Furthermore, the flow control slide valve includes a first retaining ring fixed on the outside of the chrome-plated exhaust pipe and a flow sliding ring that can slide along the outside of the chrome-plated exhaust pipe, a first spring is arranged between the first retaining ring and the flow sliding ring, and an oblique flow hole is opened on the side of the flow sliding ring away from the first retaining ring.

[0014] Furthermore, the check valve includes a second retaining ring fixed on the outside of the chrome-plated exhaust pipe and a check sliding ring that can slide along the outside of the chrome-plated exhaust pipe, a second spring is arranged between the second retaining ring and the check sliding ring, and a leakage hole is opened on the check sliding ring.

[0015] Furthermore, the elastic force of the first spring is greater than the elastic force of the second spring.

[0016] Furthermore, the short pipe assembly includes a short pipe, on which a second support ring is provided for mounting and cooperating with the inner wall of the multifunctional spray gun body.

[0017] Furthermore, the present invention also discloses the use conditions of the integrated hydraulic cavitation blowout suppressor for drilling holes in a protruding coal seam. Based on the aforementioned integrated hydraulic cavitation blowout suppressor for drilling holes in a protruding coal seam, the use conditions are divided into the following three types: S1. When drilling stops, the flow control slide valve and the check slide valve are both in the closed state. At this time, the flow sliding ring moves leftward to the right end close to the radial flow ring under the action of the first spring. At the same time, the flow sliding ring blocks the jet nozzle, and the check sliding ring moves leftward to the right end close to the two-way limit ring under the action of the second spring. S2. During hydraulic punching, low-pressure water is introduced from the left side of the flow supply channel. At this time, the water pressure is less than the elastic force of the first spring, and the flow control slide valve is in a closed state. The low-pressure water can flush away the coal dust along the flushing and anti-blocking system. At the same time, the low-pressure water will continue to move forward along the oblique flow hole and overcome the force of the second spring, pushing the check ring to move right, so that the low-pressure water cools the double-channel cover opening drill bit at its right end along the flow supply channel; S3. During hydraulic hole making, high-pressure water is introduced from the left side of the flow supply channel. At this time, the water pressure is greater than the elastic force of the first spring. The flow-through sliding ring overcomes the force of the first spring and moves right to the left end close to the two-way limit ring. The high-pressure water can wash away the coal dust along the flushing and anti-blocking system, and can also be sprayed along the jet nozzle to peel off the coal on the borehole wall over a large area. At this time, the high-pressure water cannot contact the check valve, and the check sliding ring is still close to the right end of the two-way limit ring under the action of the second spring.

[0018] The beneficial effects of the present invention are: 1. During the drilling and hydraulic cavitation of the coal hole section of the through-layer drilling, the exhaust pipe channel of this device is used to discharge the gas in the "loose hole gas bag", so as to eliminate the risk of excessive gas in the blowhole during the drilling and hydraulic cavitation of the coal hole section; after the hydraulic cavitation of the coal hole section is completed, the exhaust screen pipe is implanted through the exhaust pipe channel before drilling back, and the gas in the "loose hole gas bag" is discharged by relying on the exhaust screen pipe, so as to eliminate the risk of excessive gas in the blowhole during the drilling back process and the risk of excessive gas in the delayed blowhole after drilling back.

[0019] 2. Both the flow control slide valve and the check slide valve slide along the outer wall of the chrome-plated exhaust pipe, avoiding the problem that the multifunctional spray suppressor pipe body must be made of high-strength stainless steel. Compared with the slide valve sliding along the inner wall of the multifunctional spray suppressor pipe body, the processing cost of the cavitation spray suppressor can be reduced by three to five times.

[0020] 3. The filter mesh and check block are vulnerable parts in the flushing and anti-blocking system. Open the mesh thread cover to take out the filter mesh, which can be cleared or replaced. Open the pressure cover to remove the check block, which can be inspected or replaced.

[0021] 4. The radial air inlet holes, axial flow holes and axial air inlet and exhaust holes are concentrated in the same section of the multifunctional spray gun body. These cluster holes are formed by casting or machining. The formed porous parts are then friction welded with the steel pipe to form the matrix of the multifunctional spray gun body, which solves the sealing problem of the porous parts (spray gun parts) of the multifunctional spray gun body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the overall structural diagram of the hydraulic cavitation spray suppressor; Figure 2 It is a schematic diagram of the overall structure of the multifunctional spray gun body; Figure 3 This is a three-dimensional diagram illustrating the structure of the flushing and anti-blocking system; Figure 4 It is an exploded view of the assembly of the flushing and anti-blocking system and the multi-functional spray pipe body; Figure 5 It is a schematic diagram of the assembly of the flushing and anti-blocking system and the multifunctional spray pipe body (including the installation of the capillary tube and the concealment of the capillary tube by surfacing welding); Figure 6 It is a schematic diagram of the three-dimensional structure of the flow control inner group pipe; Figure 7 It is a schematic diagram of the three-dimensional structure of the short tube assembly; Figure 8 This is the assembly drawing of the hydraulic cavitation spray suppressor; Fig. 9 This is a schematic diagram of the operating conditions of the hydraulic cavitation spray suppressor.

[0023] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings. Example

[0025] like Figure 1As shown, the integrated hydraulic cavitation blowout suppressor for drilling through the protruding coal seam of this embodiment comprises a multifunctional blowout suppressor pipe body 1, the right end of which is connected to a double-channel open-cover drill bit through a male buckle, and the left end of which is connected to a double-channel drill rod through a female buckle, and a flow control inner pipe assembly 3 close to one side of the double-channel drill rod and a short pipe assembly 4 close to one side of the double-channel open-cover drill bit are respectively arranged in the multifunctional blowout suppressor pipe body 1; The annular space between the inner wall of the multifunctional blowout suppressor pipe body 1 and the outer wall of the flow control inner pipe assembly 3 and the short pipe assembly 4 is a flow supply channel 5. The flow direction of the medium (the medium is generally water) in the flow supply channel 5 is from left to right. The inner diameter center hole of the multifunctional blowout suppressor pipe body 1, the flow control inner pipe assembly 3 and the short pipe assembly 4 forms an exhaust pipe channel 6 that flows along the double-channel open-cover drill bit to the double-channel drill pipe. The flow direction of the medium (the medium is generally gas in the coal seam) in the exhaust pipe channel 6 is from right to left. The exhaust pipe channel 6 includes a first exhaust pipe channel 61 located in the multifunctional blowout suppressor pipe body 1, a second exhaust pipe channel 62 located in the flow control inner pipe assembly 3, and a third exhaust pipe channel 63 located in the short pipe assembly 4.

[0026] The flow supply channel 5 is also connected to a flushing and anti-blocking system 2, and the water therein can be used to flush coal dust to avoid blockage.

[0027] like Figure 2 As shown, flushing drainage holes 16 and jet nozzles 11 are respectively provided on the wall of the multifunctional spray-extinguishing pipe body 1 along the flow diversion direction of the flow supply channel 5. The flushing drainage holes 16 are connected to the flushing and anti-blocking system 2. The jet nozzle 11 can spray high-pressure water to the outside of the multifunctional spray-extinguishing pipe body 1 to facilitate hydraulic cavitation. The inner wall of the multifunctional blowout suppressor pipe body 1 is provided with radial flow rings 12 and bidirectional limit rings 13 along the flow direction of the flow supply channel 5. The middle part of the multifunctional blowout suppressor pipe body 1 is also provided with four rows of radial air inlet holes 14 and four axial flow holes 15. Each row of radial air inlet holes 14 is provided with dozens of holes. The radial air inlet holes 14, four axial flow holes 15 and the first exhaust pipe channel 61 are located at the same section of the multifunctional blowout suppressor pipe body 1. They can be formed by casting or machining. The formed porous parts are then friction welded with alloy steel pipes to form the matrix of the multifunctional blowout suppressor pipe body. Other machining is performed on this matrix to solve the sealing and strength problems of the porous parts of the multifunctional blowout suppressor pipe body. The radial air inlet holes 14 are used to attract external gas (mixed gas of gas and air in the coal seam) into the exhaust pipe channel 6. The axial flow holes 15 are connected to the flow supply channel 5 so that the medium water inside can flow from left to right.

[0028] like Figure 2 and Figure 3As shown, the radial flow ring 12 is provided with a first radial flow hole 121 communicating with the jet nozzle 11 and a second radial flow hole 122 communicating with the flushing and drainage hole 16 , so that the medium water in the flow supply channel 5 can flow out through the radial flow ring 12 .

[0029] A connecting hole 17 is provided on the side wall of the flushing and drainage hole 16, and the connecting hole 17 is connected to the pressure cover groove 19 through the buried pipe groove 18. The connecting hole 17 is an inclined hole, so that the medium water in the flow supply channel 5 can flow out along the second radial flow hole 122, the flushing and drainage hole 16, and the connecting hole 17 in sequence.

[0030] The flushing and anti-blocking system 2 includes a capillary tube 23 installed in the buried pipe groove 18 and a sieve hole air inlet plate 26 flushed by the medium in the capillary tube 23. One end of the capillary tube 23 is connected to the connecting hole 17, and the other end of the capillary tube 23 is connected to the check block 24. The check block 24 is installed on the pressure cover groove 19 through the pressure cover 25; the capillary tube 23 is made of stainless steel, and the check block 24 is made of rubber and plastic.

[0031] A filter mesh 21 and a mesh thread cover 22 are installed in the flushing and drainage hole 16 .

[0032] The check block 24 has an insertion hole 241 for inserting the capillary tube 23 and a check lip 242 for preventing the coal slag from flowing back into the capillary tube 23 . The check lip 242 is provided with diverter concave and convex edges 2421 for dispersing the medium in the capillary tube 23 .

[0033] During assembly, the filter mesh 21 is first placed in the flushing and drainage holes 16, the mesh threaded cover 22 is pressed on the filter mesh 21 (installed in the flushing and drainage holes 16), the cap 23 is placed in the buried pipe groove 18, and the ends of the cap 23 are respectively connected to the connecting hole 17 and the check block 24. After the check block 24 is placed on the gland groove 19, the gland 25 fixes the check block 24 in the gland groove 19 and fixes it to the multifunctional spray pipe body 1 with four small bolts.

[0034] In this embodiment, the flushing and drainage holes 16, the connecting holes 17, the buried pipe grooves 18 and the gland grooves 19 are two symmetrical and identical groups. The number of groups is not limited in actual implementation, but the number of groups shall not be greater than the number of radial air inlet holes 14. In this embodiment, only two of the four sieve hole air inlet plates 26 are flushed and blocked. In some embodiments, all sieve hole air inlet plates 26 can also be flushed and blocked, which is also within the scope of protection of this patent. The filter mesh 21 and the check block 24 are consumable parts in the flushing and blocking prevention system 2. By opening the mesh thread cover 22, the filter mesh 21 can be taken out for clearing or replacement, and the check block 24 can be inspected or replaced by opening the gland 25.

[0035] like Figure 4 and Figure 5As shown, after the capillary tube 23 is installed in the buried pipe groove 18, its exposed part is buried in the wall thickness of the multifunctional spray-extinguishing pipe body 1 by surfacing welding, which does not affect the overall appearance of the equipment and can also play a certain protective role. In this embodiment, four mesh air intake plates 26 cover four rows of radial air intake holes 14, and the number of radial air intake holes 14 is not limited (it can be set according to actual usage), and the mesh air intake plates 26 are installed on the multifunctional spray-extinguishing pipe body 1 by spot welding.

[0036] like Figure 6 As shown, the flow control inner tube assembly 3 includes a chrome-plated exhaust pipe 33, on which a sealing ring 31 for isolating the flow supply channel 5 and the exhaust pipe channel 6, a first support ring 32 mounted and matched with the inner wall of the multifunctional spray gun body 1, a flow control slide valve 34 and a check slide valve 35 are sequentially arranged. The inner hole of the chrome-plated exhaust pipe 33 is the second exhaust pipe channel 62.

[0037] The flow control slide valve 34 includes a first baffle ring 343 fixed on the outside of the chrome-plated exhaust pipe 33, a flow-through sliding ring 341 that can slide along the outside of the chrome-plated exhaust pipe 33, and a common guide sleeve, a sealing ring, a baffle ring, etc. A first spring 342 is arranged between the first baffle ring 343 and the flow-through sliding ring 341, and an oblique flow hole 3411 is provided on the side of the flow-through sliding ring 341 away from the first baffle ring 343. The first baffle ring 343 is a gear-shaped baffle ring. During the rightward movement of the flow-through sliding ring 341, the water flow and the slag in the water may not be able to flow out from the vicinity of the first spring 342 in time, thereby causing the flow-through sliding ring 341 to fail to operate. The gear-shaped arrangement can ensure that it can flow out from the vicinity of the first spring 342 smoothly.

[0038] The non-return sliding valve 35 includes a second retaining ring 353 fixed on the outside of the chrome-plated exhaust pipe 33, a non-return sliding ring 351 that can slide along the outside of the chrome-plated exhaust pipe 33, and common seals, guide sleeves, retaining rings, etc. A second spring 352 is arranged between the second retaining ring 353 and the non-return sliding ring 351, and a leakage hole 3511 is provided on the non-return sliding ring 351. When the non-return sliding ring 351 moves to the right, the water flow and the slag in the water may not be able to flow out from the vicinity of the second spring 352 in time, thereby causing the non-return sliding ring 351 to fail to work. The setting of the leakage hole 3511 can ensure that it can flow out from the vicinity of the second spring 352 smoothly.

[0039] In this embodiment, the first spring 342 and the second spring 352 are both compression springs. The elastic force of the first spring 342 is set according to the minimum water pressure for hole formation, and the elastic force of the second spring 352 is set according to the maximum friction resistance of the non-return sliding ring 351. The elastic force of the first spring 342 is much greater than the elastic force of the second spring 352. In some embodiments, if the dedicated two-way cover opening drill bit is already provided with a non-return device, the non-return sliding valve 35 can be eliminated, which is also within the scope of protection of this patent. Since both the through-flow sliding ring 341 and the non-return sliding ring 351 slide along the outer wall of the chrome-plated exhaust pipe 33, the rust prevention problem of the inner wall of the multifunctional spray-extinguishing pipe body 1 is avoided. Compared with sliding along the inner wall of the multifunctional spray-extinguishing pipe body 1, the processing cost of the hole formation spray-extinguishing device can be reduced by several times.

[0040] like Figure 7 As shown, the short pipe assembly 4 includes a short pipe 41, and a second support ring 42 is provided on the short pipe 41 to be mounted and matched with the inner wall of the multifunctional spray pipe body 1. The short pipe 41 does not need to be chrome-plated, and the inner hole of the short pipe 41 is the third exhaust pipe channel 63.

[0041] like Figure 8 As shown, two step holes are also provided in the first exhaust pipe channel 61 section in the multifunctional spray nozzle body 1, which can be sealed and plugged with the chrome-plated exhaust pipe 33 and the short pipe 41 respectively.

[0042] like Fig. 9 As shown, the present invention also discloses the use conditions of the integrated hydraulic cavitation blowout suppressor for drilling holes in a protruding coal seam. Based on the aforementioned integrated hydraulic cavitation blowout suppressor for drilling holes in a protruding coal seam, the use conditions are divided into the following three types: S1, such as Fig. 9 As shown in the top figure, when drilling stops, the flow control slide valve 34 and the check slide valve 35 are both in the closed state. At this time, the flow sliding ring 341 moves to the left to the right end close to the radial flow ring 12 under the action of the first spring 342. At the same time, the flow sliding ring 341 blocks the jet nozzle 11, and the check sliding ring 351 moves to the left to the right end close to the two-way limit ring 13 under the action of the second spring 352; at this time, the drill pipe can be replaced or the drill pipe can be withdrawn from the coal seam.

[0043] S2, such as Fig. 9 As shown in the middle figure, during hydraulic punching, low-pressure water is introduced from the left side of the flow supply channel 5. At this time, the water pressure is less than the elastic force of the first spring 342, and the flow control slide valve 34 is in a closed state. The low-pressure water can flush away the coal dust along the flushing and anti-blocking system 2. At the same time, the low-pressure water will continue to move forward along the oblique flow hole 3411 and overcome the force of the second spring 352, pushing the non-return sliding ring 351 to move rightward, so that the low-pressure water cools the double-channel cover opening drill bit at the right end along the flow supply channel 5; S3, such as Fig. 9As shown in the bottom figure, during hydraulic hole making, high-pressure water is introduced from the left side of the flow supply channel 5. At this time, the water pressure is greater than the elastic force of the first spring 342, and the flow sliding ring 341 overcomes the force of the first spring 342 and moves right to the left end close to the two-way limit ring 13. The high-pressure water can wash away the coal dust along the flushing and anti-blocking system 2, and can also be sprayed along the jet nozzle 11 to peel off the coal on the borehole wall over a large area. At this time, the high-pressure water cannot contact the check valve 35, and the check sliding ring 351 is still close to the right end of the two-way limit ring 13 under the action of the second spring 352.

[0044] The above embodiments do not impose any formal limitations on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

[0045] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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 cannot be understood as a limitation on the protection content of the present invention.

[0046] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated hydraulic hole-making blowout suppressor for drilling holes through a protruding coal seam, comprising a multifunctional blowout suppressor pipe body (1), characterized in that: The two ends of the multifunctional blowout suppressor pipe body (1) are respectively connected to a dual-channel open-cover drill bit and a dual-channel drill rod, and the multifunctional blowout suppressor pipe body (1) is provided with a flow control inner pipe assembly (3) close to one side of the dual-channel drill rod and a short pipe assembly (4) close to one side of the dual-channel open-cover drill bit; The annular space between the inner wall of the multifunctional blowout suppressor pipe body (1) and the outer walls of the flow control inner pipe assembly (3) and the short pipe assembly (4) is a flow supply channel (5) for flowing along the dual-channel drill pipe toward the dual-channel open-cover drill bit, and the inner diameter center hole of the multifunctional blowout suppressor pipe body (1), the flow control inner pipe assembly (3) and the short pipe assembly (4) forms an exhaust pipe channel (6) for flowing along the dual-channel open-cover drill bit toward the dual-channel drill pipe; The flow supply channel (5) is also connected to a flushing and anti-blocking system (2).

2. The integrated hydraulic hole-making and blowout suppressor for drilling holes in protruding coal seams according to claim 1 is characterized in that: Flushing and drainage holes (16) and jet nozzles (11) are respectively arranged on the pipe wall of the multifunctional spray-extinguishing pipe body (1) along the flow direction of the flow supply channel (5); radial flow rings (12) and bidirectional limit rings (13) are respectively arranged on the inner wall of the multifunctional spray-extinguishing pipe body (1) along the flow direction of the flow supply channel (5); and radial air inlet holes (14) and axial flow holes (15) are also arranged in the middle of the multifunctional spray-extinguishing pipe body (1); The radial flow ring (12) is provided with a first radial flow hole (121) connected to the jet nozzle (11) and a second radial flow hole (122) connected to the flushing and drainage hole (16).

3. The integrated hydraulic hole-making and blowout suppressor for drilling holes in protruding coal seams according to claim 2 is characterized in that: A connecting hole (17) is provided on the side wall of the flushing and drainage hole (16), and the connecting hole (17) is connected to the gland groove (19) via the buried pipe groove (18); The flushing and anti-blocking system (2) comprises a capillary tube (23) installed in a buried pipe groove (18) and a sieve hole air inlet plate (26) flushed by a medium in the capillary tube (23); one end of the capillary tube (23) is connected to the connecting hole (17); the other end of the capillary tube (23) is connected to a check block (24); and the check block (24) is installed on the gland groove (19) via a gland (25); A filter mesh (21) and a mesh thread cover (22) are installed in the flushing and drainage hole (16).

4. The integrated hydraulic cavitation and blowout suppressor for drilling through the protruding coal seam according to claim 3 is characterized in that: The check block (24) has an insertion hole (241) for inserting the capillary tube (23) and a check lip (242) for preventing coal slag from flowing back into the capillary tube (23). The check lip (242) is provided with a flow diversion concave-convex ridge (2421) for dispersing the medium in the capillary tube (23).

5. The integrated hydraulic cavitation and blowout suppressor for drilling through the protruding coal seam according to claim 2 is characterized in that: The flow control inner tube assembly (3) comprises a chrome-plated exhaust pipe (33), on which are arranged in sequence a sealing ring (31) for isolating a flow supply channel (5) and an exhaust pipe channel (6), a first support ring (32) mounted and matched with the inner wall of the multifunctional spray gun body (1), a flow control slide valve (34) and a check slide valve (35).

6. The integrated hydraulic cavitation and blowout suppressor for drilling through the protruding coal seam according to claim 5 is characterized in that: The flow control slide valve (34) comprises a first retaining ring (343) fixed on the outside of the chrome-plated exhaust pipe (33) and a flow-through sliding ring (341) that can slide along the outside of the chrome-plated exhaust pipe (33), a first spring (342) being arranged between the first retaining ring (343) and the flow-through sliding ring (341), and an oblique flow-through hole (3411) being provided on a side of the flow-through sliding ring (341) away from the first retaining ring (343).

7. The integrated hydraulic cavitation and blowout suppressor for drilling through the protruding coal seam according to claim 6 is characterized in that: The non-return sliding valve (35) comprises a second retaining ring (353) fixed to the outside of the chrome-plated exhaust pipe (33) and a non-return sliding ring (351) that can slide along the outside of the chrome-plated exhaust pipe (33), a second spring (352) is provided between the second retaining ring (353) and the non-return sliding ring (351), and a leakage hole (3511) is provided on the non-return sliding ring (351).

8. The integrated hydraulic cavitation and blowout suppressor for drilling through the protruding coal seam according to claim 7 is characterized in that: The elastic force of the first spring (342) is greater than the elastic force of the second spring (352).

9. The integrated hydraulic cavitation and blowout suppressor for drilling through the protruding coal seam according to claim 1 is characterized in that: The short pipe assembly (4) comprises a short pipe (41), on which a second support ring (42) is provided, which is mounted and matched with the inner wall of the multifunctional spray-extinguishing pipe body (1).

10. The working condition of the integrated hydraulic cavitation and blowout suppressor for drilling holes in protruding coal seams, based on the integrated hydraulic cavitation and blowout suppressor for drilling holes in protruding coal seams as claimed in claim 8, characterized in that: There are three types of operating conditions: S1. When drilling stops, the flow control slide valve (34) and the check slide valve (35) are both in a closed state. At this time, the flow sliding ring (341) moves to the left under the action of the first spring (342) to be close to the right end of the radial flow ring (12). At the same time, the flow sliding ring (341) blocks the jet nozzle (11). The check sliding ring (351) moves to the left under the action of the second spring (352) to be close to the right end of the bidirectional limit ring (13); S2. During hydraulic punching, low-pressure water is introduced from the left side of the flow supply channel (5). At this time, the water pressure is less than the elastic force of the first spring (342), and the flow control slide valve (34) is in a closed state. The low-pressure water can flush away the coal dust along the flushing and anti-blocking system (2). At the same time, the low-pressure water will continue to move forward along the oblique flow hole (3411) and overcome the force of the second spring (352), pushing the non-return sliding ring (351) to move rightward, so that the low-pressure water cools the double-channel cover opening drill bit at the right end of the flow supply channel (5); S3. During hydraulic hole making, high-pressure water is introduced from the left side of the flow supply channel (5). At this time, the water pressure is greater than the elastic force of the first spring (342). The flow-through sliding ring (341) overcomes the force of the first spring (342) and moves rightward to the left end close to the two-way limit ring (13). The high-pressure water can wash away the coal dust along the flushing and anti-blocking system (2), and can also be sprayed along the jet nozzle (11) to peel off the coal on the borehole wall over a large area. At this time, the high-pressure water cannot contact the check valve (35). The check sliding ring (351) is still close to the right end of the two-way limit ring (13) under the action of the second spring (352).

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