CN114183089B - Novel colliery is beaten in pit and is bored blowout preventer - Google Patents
Novel colliery is beaten in pit and is bored blowout preventer Download PDFInfo
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- CN114183089B CN114183089B CN202111524426.3A CN202111524426A CN114183089B CN 114183089 B CN114183089 B CN 114183089B CN 202111524426 A CN202111524426 A CN 202111524426A CN 114183089 B CN114183089 B CN 114183089B
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- hole
- blowout prevention
- drilling
- sealing
- clamping sleeve
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- 238000007789 sealing Methods 0.000 claims abstract description 98
- 238000005553 drilling Methods 0.000 claims abstract description 64
- 230000002265 prevention Effects 0.000 claims abstract description 58
- 239000003245 coal Substances 0.000 claims abstract description 37
- 239000002893 slag Substances 0.000 claims abstract description 33
- 238000010276 construction Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims description 30
- 239000005060 rubber Substances 0.000 claims description 30
- 238000000605 extraction Methods 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 31
- 230000009471 action Effects 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000004220 aggregation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of coal seam gas control equipment, in particular to a novel underground drilling blowout prevention device for a coal mine, which comprises a fixed support arranged on a guide rail of a drilling machine clamp holder, a blowout prevention collecting device arranged on the fixed support, a drill rod sealing device arranged at the front end of the blowout prevention collecting device, and a drilling sealing device arranged at the rear end of the blowout prevention collecting device, wherein the blowout prevention collecting device and the drilling machine clamp holder are coaxial. According to the invention, a large amount of gas and coal water slag generated by drilling are collected in a limited space under the action of negative pressure, gas, water and slag are separated, each gas escape point in the drilling process is controlled, the gas content overrun in a roadway caused by gas aggregation is effectively prevented, and the construction environment and safety are ensured.
Description
Technical Field
The invention relates to the technical field of coal seam gas control equipment, in particular to a novel underground coal mine drilling blowout preventer.
Background
When the mine is used for carrying out drilling to treat gas, the 'jet hole' is one of the difficult problems of restricting the safe and efficient construction of the gas extraction drilling, and the characteristics of high strength, large emission amount, uncontrollable jet hole time and the like of the gas jet hole are highlighted, so that the high-concentration gas and coal (rock) powder sprayed out not only influence the physical health of operators, but also easily cause the overrun of the gas in the drilling site or a roadway, and influence the safety and the construction efficiency of the operation environment.
Therefore, the blowout prevention device is added at the drilling position for blowout prevention protection in the drilling process of the underground coal mine. However, because of certain differences of occurrence conditions and exploitation conditions of coal beds of all mines, factors which have great influence on drilling construction, such as the specification and size of a roadway, the gradient and fluctuation state of a bottom plate, the arrangement of facilities such as pipelines in the roadway and the like, the model structures of drilling machines and the like, and the patterns, the sizes and the installation modes of blowout preventers used by all mines are also characterized and different.
The blowout preventer commonly used at present is mostly steel structure, and is bulky, though can be effectual collection beat the pulverized coal and the gas of boring the blowout in the period, nevertheless exist blowout preventer cover bulky, heavy, adopt the manpower installation time long, dismantle troublesome, the availability factor scheduling problem. Partial blowout preventer has poor tightness, so that gas in a drilled hole overflows from the inside and the outside of the device, blowout prevention can not be achieved at all, the gas is affected by the sudden nature of gas jet holes of the drilled hole and the randomness of the strength of the jet holes, and the manual drilling stopping and secondary protection often have obvious hysteresis effects, so that the safety risk of the operation of site constructors is increased, and great hidden danger is caused to the mine.
Disclosure of Invention
The invention aims to solve the problems, and provides a novel underground coal mine drilling blowout preventer which enables gas and coal water slag in a coal layer to enter a blowout preventer through a hole sealing pipe, enables gas to enter an underground negative pressure extraction pipeline through an extraction pipe, and enables a coal water slag mixture to enter a subsequent coal water slag separation device through a slag discharging pipe.
In order to solve the problems, the invention adopts the following technical scheme:
the utility model provides a novel colliery is beaten in pit and is spouted device, includes the fixed bolster of installing on rig holder guide rail, installs the collection device that prevents spouting on the fixed bolster, installs at the drilling rod sealing device who prevents spouting collection device front end to and install at the drilling sealing device who prevents spouting collection device rear end, prevent spouting collection device and rig holder coaxial.
The fixing support comprises two guide posts symmetrically arranged, two adjustable stand columns vertically upwards arranged on each guide post, a horizontal guide rod transversely arranged between the two adjustable stand columns on the same guide post, a lower clamping sleeve rotatably arranged on one horizontal guide rod through two sleeve rods and an upper clamping sleeve rotatably arranged on the other horizontal guide rod through two sleeve rods, wherein the lower clamping sleeve and the upper clamping sleeve are of a semi-cylindrical cavity structure, a boss and a U-shaped groove are reserved at the tail end of the lower clamping sleeve and are vertically symmetrically arranged, gaskets of the same size are arranged in the lower clamping sleeve and the upper clamping sleeve, mounting shafts matched with positioning sleeves on a guide rail of a drilling machine clamp holder are arranged at two ends of each guide post, a fixing lock catch is arranged between the lower clamping sleeve and the upper clamping sleeve in a matched mode, and the height of the adjustable stand columns is adjusted through a set screw.
The distance between the first loop bars is smaller than the distance between the second loop bars.
The blowout prevention collecting device comprises a blowout prevention box body arranged between a lower clamping sleeve and an upper clamping sleeve, extraction pipes and slag discharging pipes symmetrically arranged on two sides of the blowout prevention box body, a hole sealing pipe fixedly connected with the front end of the blowout prevention box body through a hole sealing pipe flange, and a baffle fixedly connected with the tail end of the blowout prevention box body through a baffle flange in a sealing way, wherein a filter screen is arranged inside the extraction pipes.
The drill rod sealing device comprises wear-resistant rubber and sealing gaskets, the drill rod sealing device adopts a 1+2+1+2 structure, the wear-resistant rubber is of a cavity semi-cylindrical structure, two wear-resistant rubbers are of a group, the inner diameter size of the two wear-resistant rubbers is consistent with the outer diameter of a drill rod, the sealing gaskets are of a disc structure, the diameter of a central hole is smaller than the outer diameter size of the drill rod, micro grooves are radially machined along the central hole, the diameter of the bottoms of the micro grooves is larger than the outer diameter size of the drill rod, and the two sealing gaskets are installed in a staggered mode when the drill rod sealing device is used.
The drilling sealing device comprises an in-hole seal and an orifice seal, wherein the in-hole seal is rubber teeth which are distributed on the outer side of a hole sealing pipe along an axial array, the overall appearance structure of the in-hole seal is conical, the outer diameter size of the rubber teeth which are distributed along the axial direction of the in-hole seal is continuously increased, the minimum size of the rubber teeth is between the outer diameter of the hole sealing pipe and the inner diameter of a drilling hole, the maximum size of the rubber teeth is larger than the inner diameter of the drilling hole, the overall structure of the orifice seal is of a horn shape and can be compressed along the axial direction, and the small-diameter end of the orifice seal is in sealing connection with a blowout prevention box body through an orifice sealing flange.
A novel construction flow of a coal mine underground drilling blowout prevention device comprises the following steps:
1) Firstly, constructing a rock hole with a designed length at a construction site, then installing a fixed bracket on a guide rail of a drilling machine, and then placing the installed blowout prevention collecting device between a lower clamping sleeve and an upper clamping sleeve, and clamping and fixing the blowout prevention collecting device through a fixed lock catch;
2) Then, the four adjustable upright posts keep the same height by adjusting the set screw, so that the coaxial center of the blowout prevention collecting device and the drilling machine clamp holder is ensured
3) Sequentially passing a drill rod through a drill holder, a drill rod sealing device, a blowout prevention box body and a hole sealing pipe, and then installing a baffle plate to fix the tail end;
4) The azimuth angle of the drilling machine is adjusted, the hole sealing pipe is sent into the original construction drilling hole by means of the expansion and contraction of the guide rail oil cylinder, and the hole sealing rubber is extruded and sealed with the hole wall in a fitting way, so that double sealing inside and outside the hole is realized;
5) The box body extraction pipe is connected with an underground extraction pipeline, the slag discharging pipe is connected with a subsequent coal water slag separation device, and discharged gas coal water slag enters the blowout prevention box body through the hole sealing pipe in the drilling construction process, so that separation is realized, and safe operation is ensured;
6) After the installation is completed, drilling construction is continued, gas and coal water slag in the coal seam enter the blowout prevention box body through the hole sealing pipe, the gas enters the underground negative pressure extraction pipeline through the extraction pipe, and the coal water slag mixture enters the subsequent coal water slag separation device through the slag discharging pipe.
The gain effect of the invention is:
according to the invention, a large amount of gas and coal water slag generated by drilling are collected in a limited space under the action of negative pressure, gas, water and slag are separated, each gas escape point in the drilling process is controlled, the gas content overrun in a roadway caused by gas aggregation is effectively prevented, and the construction environment and safety are ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the fixing bracket of the present invention.
Fig. 3 is a cross-sectional view of the present invention.
Fig. 4 is a schematic structural view of the drill rod sealing device of the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings.
See fig. 1, 2, 3 and 4, where the numbers are: the anti-spraying device comprises a fixing support 1, a spraying-prevention collecting device 2, a drill rod sealing device 3, a drilling sealing device 4, a guide rod 11, an adjustable upright column 12, a set screw 13, a horizontal guide rod 14, a lower clamping sleeve 15, an upper clamping sleeve 16, a clamping sleeve gasket 17, a sleeve rod 151, a sleeve rod 161, a fixing lock catch 19, a sealing hole pipe 21, a gasket 22, a spraying-prevention box 23, a baffle gasket 24, a baffle 25, a wear-resistant rubber 31, a sealing gasket 32, a hole sealing 41, an orifice sealing 42, a mounting shaft 111, a sealing hole pipe flange 231, an orifice sealing flange 232, a baffle flange 233, a pumping pipe 234, a filter screen 235 and a slag discharging pipe 236.
The invention discloses a novel underground coal mine drilling blowout preventer, which comprises a fixed support 1, a blowout prevention collecting device 2, a drill rod sealing device 3 and a drill hole sealing device 4, wherein the fixed support 1 is arranged on a guide rail of a drill holder, the blowout prevention collecting device 2 is arranged on the fixed support 1, the drill rod sealing device 3 is arranged at the front end of the blowout prevention collecting device 2, and the drill hole sealing device 4 is arranged at the rear end of the blowout prevention collecting device 2, and the blowout prevention collecting device 2 and the drill holder are coaxial.
The fixing support 1 comprises two guide posts 11 which are symmetrically arranged, two adjustable upright posts 12 which are vertically and upwards arranged on each guide post 11, a horizontal guide rod 14 which is transversely arranged between the two adjustable upright posts 12 on the same guide post 11, a lower clamping sleeve 15 which is rotatably arranged on one horizontal guide rod 14 through two sleeve rods 151, and an upper clamping sleeve 16 which is rotatably arranged on the other horizontal guide rod 14 through two sleeve rods 161, wherein the lower clamping sleeve 15 and the upper clamping sleeve 16 are of a semi-cylindrical cavity structure, a boss and a U-shaped groove are reserved at the tail end of the lower clamping sleeve 15 and the tail end of the upper clamping sleeve 16, gaskets 17 of the same size are transversely arranged at the tail ends of the lower clamping sleeve 15 and the upper clamping sleeve 16, mounting shafts 111 which are matched with positioning sleeves on a clamp holder guide rail are respectively arranged at the two ends of the guide posts 11, fixing locks 19 are arranged between the lower clamping sleeve 15 and the upper clamping sleeve 16 in a matching mode, and the height of the adjustable upright posts 12 are adjusted through fixing bolts 13.
The distance between the first loop bars 151 is smaller than the distance between the second loop bars 161.
The blowout prevention collecting device 2 comprises a blowout prevention box body 23 arranged between a lower clamping sleeve 15 and an upper clamping sleeve 16, a suction pipe 234 and a slag discharging pipe 236 symmetrically arranged on two sides of the blowout prevention box body 23, a hole sealing pipe 21 fixedly connected with the front end of the blowout prevention box body 23 through a hole sealing pipe flange 231, and a baffle 25 fixedly connected with the tail end of the blowout prevention box body 23 in a sealing way through a baffle flange 233, wherein a filter screen 235 is arranged inside the suction pipe 234.
The drill rod sealing device 3 comprises wear-resistant rubber 31 and sealing gaskets 32, the drill rod sealing device adopts a structure of '1 sealing gaskets 32+2 wear-resistant rubber 31+1 sealing gaskets 32+2 wear-resistant rubber 31', the wear-resistant rubber 31 is of a cavity semi-cylindrical structure, the two wear-resistant rubbers 31 are in a group, the inner diameter size of the two wear-resistant rubbers is consistent with the outer diameter of a drill rod, the sealing gaskets 32 are of a disc structure, the diameter of a central hole is smaller than the outer diameter size of the drill rod, micro grooves are radially machined along the central hole, the diameter of the bottoms of the micro grooves is larger than the outer diameter size of the drill rod, and the two sealing gaskets 32 are installed in a staggered mode during use.
The drilling sealing device 4 comprises an in-hole sealing 41 and an orifice sealing 42, wherein the in-hole sealing 41 is rubber teeth which are distributed on the outer side of a hole sealing pipe along an axial array, the overall appearance structure of the in-hole sealing 41 is conical, the outer diameter of the rubber teeth which are distributed along the axial direction of the in-hole sealing 41 is continuously increased, the minimum size of the rubber teeth is between the outer diameter of the hole sealing pipe and the inner diameter of a drilling hole, the maximum size of the rubber teeth is larger than the inner diameter of the drilling hole, the overall structure of the orifice sealing 42 is a horn shape and can be compressed along the axial direction, and the small-diameter end of the orifice sealing 42 is in sealing connection with a blowout prevention box body through an orifice sealing flange.
The whole device adopts a split combination mode, all parts are connected in a clamping hoop, a bolt, a splicing mode and the like, the assembly, the disassembly, the replacement and the maintenance are convenient, the mounting shafts 111 are symmetrically distributed at the two ends of the guide rod 11 and matched with the positioning sleeve on the guide rail of the drilling machine clamp holder, the whole device is positioned, a symmetrical structure is adopted, front and back and left and right do not need to be distinguished during use, the installation is more convenient and rapid, and the efficiency is higher. When the blowout preventer is used, the device and a drilling machine clamp holder must be ensured to be coaxial, four adjustable upright posts 12 can be adjusted to the same height to realize the blowout preventer, the device can be suitable for drilling machines of different models through adjusting the height, the application range is wider, the lower clamping sleeve 15 and the tail end of the upper clamping sleeve 16 are provided with a boss and a U-shaped groove which are vertically symmetrical, in order to ensure the axial stress of the device, the tail ends of the lower clamping sleeve 15 and the upper clamping sleeve 16 adopt a boss structure, so that the abrasion between the devices is reduced, the vibration is reduced, a gasket 17 is arranged between the lower clamping sleeve 15 and the upper clamping sleeve 16 and the blowout preventer body 23, the support balance strength of the fixed support 1 is high, the installation is simple, the bilateral support is realized, the overall stability of the device is enhanced, the lifting is flexible and rapid, the crawler drilling machine is utilized to provide supporting force with a propelling cylinder, and the operation is convenient.
The whole material of blowout prevention collection device 2 adopts carbon fiber material, intensity is high quality little to fire-retardant antistatic, blowout prevention box 23 wholly is cylindrical cavity structure, is convenient for arrange sediment, and two mouth of pipe of its upper and lower symmetric distribution, one is for taking out the adoption pipe 234, and the opposite side is the scum pipe 236, is for preventing the dust and get into taking out the adoption pipeline, has filter screen 235 at taking out the pipe 234 internally mounted, for the installation of being convenient for whole mechanism and use, baffle 25 designs to two semicircle disc structures, and the size is unanimous, through baffle flange 233 and blowout prevention box 23 seal fixation.
In order to enhance the sealing effect, the first drill rod sealing device 3 is integrally of a 1+2+1+2 structure, and in order to further enhance the sealing effect, the two sealing gaskets 32 are arranged in a staggered manner during use. In the construction process, the drill rod is in a rotary motion state relative to the blowout preventer, and the sealing effect can be ensured to the greatest extent by adopting the structure.
The integral structure of the orifice seal 42 is a horn, and the orifice seal 42 can be compressed along the axial direction by utilizing the fold structure of the orifice seal 42 and is connected with the blowout prevention box body 2 in a sealing way through the orifice seal flange 232, and the orifice seal 42 is continuously compressed and is attached to the roadway wall or the rock wall under the action of the guide rail oil cylinder of the drilling machine, so that the orifice seal is realized. The device adopts hole mouth double containment, can effectively reduce drilling gas leakage, cooperates great blowout prevention box 23, when effectively having increased the ability of holding gas, has reduced the escape volume of hole gas toward the tunnel in.
A novel construction flow of a coal mine underground drilling blowout prevention device comprises the following steps:
1) Firstly, constructing a rock hole with a designed length at a construction site, then installing a fixed bracket 1 on a drill guide rail, then placing the installed blowout prevention collecting device 2 between a lower clamping sleeve 15 and an upper clamping sleeve 16, and clamping and fixing the blowout prevention collecting device through a fixed lock catch 19;
2) Then, the four adjustable upright posts 12 are kept at the same height by adjusting the set screws 13, so that the coaxiality of the blowout prevention collecting device 2 and the drill holder is ensured
3) Sequentially passing a drill rod through a drill holder, a drill rod sealing device 3, a blowout prevention box 23 and a hole sealing pipe 21, and then installing a baffle plate to fix the tail end;
4) The azimuth angle of the drilling machine is adjusted, the hole sealing pipe is sent into the original construction drilling hole by means of the expansion and contraction of the guide rail oil cylinder, and the hole sealing rubber is extruded and sealed with the hole wall in a fitting way, so that double sealing inside and outside the hole is realized;
5) The box body extraction pipe 234 is connected with an underground extraction pipeline, the slag discharging pipe 236 is connected with a subsequent coal water slag separation device, and discharged gas coal water slag enters the blowout prevention box body 23 through the hole sealing pipe 21 in the drilling construction process, so that separation is realized, and safe operation is ensured;
6) After the installation is completed, drilling construction is continued, gas and coal water slag in a coal bed enter a blowout prevention box body through a hole sealing pipe, the gas enters an underground negative pressure extraction pipeline through an extraction pipe, and a coal water slag mixture enters a subsequent coal water slag separation device through a slag discharging pipe;
7) The equipment is recovered and maintained, after the drilling operation is completed, the drilling tool is withdrawn, hole sealing and continuous pumping are carried out on the drilling tool, the drilling tool and the blowout preventer can be moved to the next construction site to carry out the repeated operation, after the operation is completed completely, the blowout preventer is disassembled, cleaning and recovering are carried out, the cleaning and the storing are carried out according to the requirement, and the damaged part is maintained and replaced in time.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides a novel colliery is beaten in pit and is beaten blowout preventer which characterized in that: the drilling rod sealing device is arranged at the rear end of the blowout prevention collecting device, and the blowout prevention collecting device and the drilling rod sealing device are coaxial; the fixing support comprises two guide posts symmetrically arranged, two adjustable upright posts vertically upwards arranged on each guide post, a horizontal guide rod transversely arranged between the two adjustable upright posts on the same guide post, a lower clamping sleeve rotatably arranged on one horizontal guide rod through two sleeve rods and an upper clamping sleeve rotatably arranged on the other horizontal guide rod through two sleeve rods, the lower clamping sleeve and the upper clamping sleeve are of a semi-cylindrical cavity structure, a boss and a U-shaped groove are reserved at the tail end of the lower clamping sleeve and the tail end of the upper clamping sleeve in an up-down symmetrical mode, gaskets with the same size are arranged in the lower clamping sleeve and the upper clamping sleeve, mounting shafts matched with positioning sleeves on guide rails of a drilling machine clamp holder are arranged at two ends of each guide post, a fixing lock catch is arranged between the lower clamping sleeve and the upper clamping sleeve in a matched mode, and the adjustable upright posts are adjusted in height position through a set screw; the distance between the first loop bars is smaller than the distance between the second loop bars; the blowout prevention collecting device comprises a blowout prevention box body arranged between a lower clamping sleeve and an upper clamping sleeve, extraction pipes and slag discharging pipes symmetrically arranged on two sides of the blowout prevention box body, a hole sealing pipe fixedly connected with the front end of the blowout prevention box body through a hole sealing pipe flange, and a baffle fixedly connected with the tail end of the blowout prevention box body through a baffle flange in a sealing way, wherein a filter screen is arranged in the extraction pipes; the drill rod sealing device comprises wear-resistant rubber and sealing gaskets, the drill rod sealing device adopts a structure of '1+2+1+2', the wear-resistant rubber is of a cavity semi-cylindrical structure, two wear-resistant rubbers are of a group, the inner diameter size of the two wear-resistant rubbers is consistent with the outer diameter of a drill rod, the sealing gaskets are of a disc structure, the diameter of a central hole is smaller than the outer diameter size of the drill rod, micro grooves are radially processed along the central hole, the diameter of the bottoms of the micro grooves is larger than the outer diameter size of the drill rod, and the two sealing gaskets are installed in a staggered mode when the drill rod sealing device is used; the drilling sealing device comprises an in-hole seal and an orifice seal, wherein the in-hole seal is rubber teeth which are distributed on the outer side of a hole sealing pipe along an axial array, the overall appearance structure of the in-hole seal is conical, the outer diameter size of the rubber teeth which are distributed along the axial direction of the in-hole seal is continuously increased, the minimum size of the rubber teeth is between the outer diameter of the hole sealing pipe and the inner diameter of a drilling hole, the maximum size of the rubber teeth is larger than the inner diameter of the drilling hole, the overall structure of the orifice seal is of a horn shape and can be compressed along the axial direction, and the small-diameter end of the orifice seal is in sealing connection with a blowout prevention box body through an orifice sealing flange.
2. A construction process of a novel underground coal mine drilling blowout preventer according to claim 1, comprising the steps of:
firstly, constructing a rock hole with a designed length at a construction site, then installing a fixed bracket on a guide rail of a drilling machine, and then placing the installed blowout prevention collecting device between a lower clamping sleeve and an upper clamping sleeve, and clamping and fixing the blowout prevention collecting device through a fixed lock catch;
then, the four adjustable upright posts keep the same height by adjusting the set screw, so that the coaxial center of the blowout prevention collecting device and the drilling machine clamp holder is ensured
Sequentially passing a drill rod through a drill holder, a drill rod sealing device, a blowout prevention box body and a hole sealing pipe, and then installing a baffle plate to fix the tail end; the azimuth angle of the drilling machine is adjusted, the hole sealing pipe is sent into the original construction drilling hole by means of the expansion and contraction of the guide rail oil cylinder, and the hole sealing rubber is extruded and sealed with the hole wall in a fitting way, so that double sealing inside and outside the hole is realized;
the box body extraction pipe is connected with an underground extraction pipeline, the slag discharging pipe is connected with a subsequent coal water slag separation device, and discharged gas coal water slag enters the blowout prevention box body through the hole sealing pipe in the drilling construction process, so that separation is realized, and safe operation is ensured;
after the installation is completed, drilling construction is continued, gas and coal water slag in the coal seam enter the blowout prevention box body through the hole sealing pipe, the gas enters the underground negative pressure extraction pipeline through the extraction pipe, and the coal water slag mixture enters the subsequent coal water slag separation device through the slag discharging pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111524426.3A CN114183089B (en) | 2021-12-14 | 2021-12-14 | Novel colliery is beaten in pit and is bored blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111524426.3A CN114183089B (en) | 2021-12-14 | 2021-12-14 | Novel colliery is beaten in pit and is bored blowout preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183089A CN114183089A (en) | 2022-03-15 |
| CN114183089B true CN114183089B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111524426.3A Active CN114183089B (en) | 2021-12-14 | 2021-12-14 | Novel colliery is beaten in pit and is bored blowout preventer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115199318B (en) * | 2022-07-15 | 2023-12-12 | 铁福来装备制造集团股份有限公司 | Multifunctional integrated operation drilling construction platform for coal mine and operation method thereof |
| CN116792053B (en) * | 2023-08-25 | 2023-11-14 | 山东天河科技股份有限公司 | Underground coal mine drilling blowout preventer |
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| CA1239091A (en) * | 1985-01-21 | 1988-07-12 | Dieter Trosin | Blowout preventer valve and bop stack |
| CN103089172A (en) * | 2013-01-18 | 2013-05-08 | 杭州祥龙钻探设备有限公司 | Drilling system special for coal mine underground tunnel water control |
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