CN204060514U - Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus - Google Patents

Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus Download PDF

Info

Publication number
CN204060514U
CN204060514U CN201420200796.0U CN201420200796U CN204060514U CN 204060514 U CN204060514 U CN 204060514U CN 201420200796 U CN201420200796 U CN 201420200796U CN 204060514 U CN204060514 U CN 204060514U
Authority
CN
China
Prior art keywords
drilling
nozzle
pressure
pressure water
drill bit
Prior art date
Application number
CN201420200796.0U
Other languages
Chinese (zh)
Inventor
曹建军
张永将
孟贤正
李成成
刘军
徐遵玉
陈国红
程国建
李高帅
袁本庆
陆占金
Original Assignee
中煤科工集团重庆研究院有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中煤科工集团重庆研究院有限公司 filed Critical 中煤科工集团重庆研究院有限公司
Priority to CN201420200796.0U priority Critical patent/CN204060514U/en
Application granted granted Critical
Publication of CN204060514U publication Critical patent/CN204060514U/en

Links

Abstract

The utility model discloses a kind of colliery layer-through drilling high-pressure water jet drilling and expanding apparatus, comprise rig, high-pressure water shot streaming system, drilling rod and drill bit, rig drives drilling rod rotate and pierce colliery layer, high-pressure water shot streaming system comprises water tank, high-pressure hydraulic pump and high-pressure rubber pipe, high-pressure rubber pipe to be connected with the afterbody of drilling rod by chicksan and to communicate, drill bit is provided with the nozzle for water under high pressure injection, drill bit can rotate from axle under the rotarily driving of described drilling rod, nozzle comprises the propulsion nozzle being located at chisel edge and the side direction nozzle being located at drill bit sidewall, side direction nozzle comprises the slag-discharging nozzle favouring drill axis and offer backward, the coal body of propulsion nozzle to front at least forms axial impact force, make stressed coal body stand water under high pressure to soak and broken or broken by drilling bit grinding gradually, by setting up towards rearward slag-discharging nozzle, broken cinder can be promoted to bore entrance one lateral movement, accelerate the discharge of cinder, avoid cinder to pile up and cause deslagging not smooth, increase depth of pore forming.

Description

Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus
Technical field
The utility model relates to a kind of colliery layer-through drilling device, particularly a kind of colliery layer-through drilling high-pressure water jet drilling and expanding apparatus.
Background technology
Along with the development of coal in China industry and national economy are to the increase of coal demand, coal production improves constantly.Like this, existing high methane and coal and gas outburst mine face the pressure improving output on the one hand, and the deepening of mine main makes original mine gradually become high methane, projecting mine more and more on the other hand.For projecting coal bed and high gas layer, gas drainage under suction is the measure that effects a permanent cure that gas was given prominence to and administered in control, and gas suction by drilling is feasible and comparatively economic a kind of drainage method, has obtained and has applied more and more widely.China is the country that coal and gas prominent disaster is the most serious, and according to incompletely statistics, outstanding number of times is more than 600 times every year on average, and protrusion-dispelling is the main task of Safety of Coal Mine Production.
In order to solve at China's high-ground stress, the problem that in weak seam, the boring of conventional mechanical drilling machine construction concordant is difficult and sector hole footpath, layer-through drilling coal seam is little, realize the object of coal seam concordant boring and reaming synchronization implementation and layer-through drilling reaming, also coal seam high pressure water jet drilling reaming system is there is in prior art, it comprises high-pressure water jet generation systems, rig, drill rod boring tool system, high-pressure water jet generation systems comprises the storage tank be connected successively, high-pressure hydraulic pump, high-pressure rubber pipe, rig comprises rig console and rig body, drill rod boring tool system comprises high-pressure rotary sealing device, high pressure sealing drilling rod, the jet machinery vane group with High pressure water jet nozzle closes tower type drill bit, by high-pressure water jet at the bottom of hole and the cutting and grinding synergy of the circumgyration incision of hole wall coal body and mechanical blade realize creeping into of hole, coal seam and reaming, effectively can avoid the bit freezing in coal bed drilling process and stick of tool phenomenon, at high-ground stress, wide-aperture long drilled holes is formed in weak seam, increase gas permeability and the relief range of boring surrounding medium, improve gas drainage under suction effect and the protrusion-dispelling effect of coal bed drilling.But, in actual applications, this system is only paid attention to carry out axially boring surrounding medium, radial, tiltedly forward direction jet hit, broken and moistening, although the bulk cinder occurred in boring procedure can be polished respectively, but along with the increase of depth of pore forming, a large amount of cinder is piled up boring and is caused deslagging not smooth, makes the Completion of Drilling Hole degree of depth limited, greatly limit its application.
Therefore, just need a kind of improved colliery layer-through drilling high-pressure water jet drilling and expanding apparatus, it can not only carry out jet strike, fragmentation and moistening to boring surrounding medium in boring procedure, the discharge of drilling cuttings in reaming can also be accelerated, avoiding cinder to pile up causes deslagging not smooth, increase depth of pore forming, increase the range of application of drilling and expanding apparatus.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of colliery layer-through drilling high-pressure water jet drilling and expanding apparatus, it can not only carry out jet strike, fragmentation and moistening to boring surrounding medium in boring procedure, the discharge of drilling cuttings in reaming can also be accelerated, avoiding cinder to pile up causes deslagging not smooth, increase depth of pore forming, increase the range of application of drilling and expanding apparatus.
Colliery of the present utility model layer-through drilling high-pressure water jet drilling and expanding apparatus, it comprises rig, high-pressure water shot streaming system, drilling rod and be connected the drill bit communicated with described drilling rod, described rig drives described drilling rod rotate and pierce colliery layer, described high-pressure water shot streaming system comprises the water tank connected successively, high-pressure hydraulic pump and high-pressure rubber pipe, described high-pressure rubber pipe to be connected with the afterbody of described drilling rod by chicksan and to communicate, described drill bit is provided with the nozzle for water under high pressure injection, described drill bit can rotate from axle under the rotarily driving of described drilling rod, described nozzle comprises the propulsion nozzle being located at described chisel edge and the side direction nozzle being located at described drill bit sidewall, described side direction nozzle comprises the slag-discharging nozzle favouring described drill axis and offer backward.
Further, the angle between described slag-discharging nozzle axis and described drill axis is 30 °-70 °.
Further, described slag-discharging nozzle is arranged in equally spaced manner, and is circumferentially symmetrical arranged at least two in same longitudinal section.
Further, described side direction nozzle also comprises the reaming jet nozzle offered along described drill bit radial direction, before described reaming jet nozzle is located at described slag-discharging nozzle.
Further, described reaming jet nozzle is arranged in equally spaced manner, and is circumferentially symmetrical arranged at least two in same longitudinal section.
Further, described chisel edge evenly arranges at least three by Central Symmetry and bores tooth, described propulsion nozzle comprises be located at described bit central straight to nozzle and the oblique nozzle be located between each described brill tooth, and the angle between described oblique nozzle-axis and described drill axis is 10 °-60 °.
Further, described chicksan comprises the axis of rotation of housing, bearing, sealing ring and hollow, flange plate structure is processed at described housing two ends, described axis of rotation is arranged on described enclosure interior and can realizes axial-rotation with described bearing fit under external force, the junction of described bearing, axis of rotation and described housing is sealed by sealing ring, one end of described axis of rotation is connected with described drilling rod, the other end is fixedly connected with described high-pressure rubber pipe, described housing has the oilhole passing to described bearing.
Further, the connection between described drill bit and drilling rod, and the connection successively when lengthening described run of steel between many described drilling rods head and the tail all adopts built-in crush seal connected mode.
Further, be connected by snap joint between described high-pressure rubber pipe with described chicksan.
The beneficial effects of the utility model: colliery of the present utility model layer-through drilling high-pressure water jet drilling and expanding apparatus, water under high pressure sends into nozzle through drilling rod, form high pressure fine jet to impact coal body, wherein the coal body of propulsion nozzle to front at least forms axial impact force, make stressed coal body stand water under high pressure to soak and broken or broken by drilling bit grinding gradually, side direction nozzle forms side impacting force to surrounding coal body, especially towards rearward slag-discharging nozzle, it can to the broken cinder of promotion to bore entrance one lateral movement, accelerate the discharge of cinder, avoiding cinder to pile up causes deslagging not smooth, increase depth of pore forming, the utility model structure is simple, easy to use, has very strong application value.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of drill bit of the present utility model;
Fig. 3 is the structural representation of chicksan of the present utility model;
Fig. 4 is the built-in extruded sealing structure schematic diagram of drilling rod of the present utility model.
Detailed description of the invention
Fig. 1 is structural representation of the present utility model, Fig. 2 is the structural representation of drill bit of the present utility model, Fig. 3 is the structural representation of chicksan of the present utility model, Fig. 4 is the built-in extruded sealing structure schematic diagram of drilling rod of the present utility model, as shown in the figure: the colliery layer-through drilling high-pressure water jet drilling and expanding apparatus of the present embodiment, it comprises rig 1, high-pressure water shot streaming system, drilling rod 2 and be connected the drill bit 3 communicated with described drilling rod 2, described rig 1 drives described drilling rod 2 rotate and pierce colliery layer, described high-pressure water shot streaming system comprises the water tank 41 connected successively, high-pressure hydraulic pump 42 and high-pressure rubber pipe 43, described high-pressure rubber pipe 43 is connected by the afterbody of chicksan 5 with described drilling rod 2 and is communicated, described drill bit 3 is provided with the nozzle for water under high pressure injection, described drill bit 3 can rotate from axle under the rotarily driving of described drilling rod 2, described nozzle comprises the propulsion nozzle being located at described drill bit 3 front end and the side direction nozzle being located at described drill bit 3 sidewall, described side direction nozzle comprises the slag-discharging nozzle 31 favouring described drill bit 3 axis and offer backward, water tank 41 is for storing water source, high-pressure hydraulic pump 42 can use the water under high pressure plunger displacement pump that rated pressure is 25MPa, metered flow is 75L/min, control valve is provided with coutroi velocity in high-pressure rubber pipe 43, drilling rod 2, drill bit 3 are hollow structure, with conveying high-pressure water, the one end be positioned at when drill bit 3 is to hole above is front end, water under high pressure sends into nozzle through drilling rod 2, form high pressure fine jet to impact coal body, wherein the coal body of propulsion nozzle to front at least forms axial impact force, make stressed coal body stand water under high pressure to soak and broken or grind fragmentation by drill bit 3 gradually, side direction nozzle forms side impacting force to surrounding coal body, especially towards rearward slag-discharging nozzle 31, it can to the broken cinder of promotion to bore entrance one lateral movement, accelerate the discharge of cinder, avoid cinder to pile up and cause deslagging not smooth, increase depth of pore forming, in addition, slag-discharging nozzle 31 can also be designed to self-rotation structure, namely can fast rotational under the driving of water under high pressure, thus ring-type cutting is formed to borehole wall, accelerate the discharge of cinder further, angle α between described slag-discharging nozzle 31 axis and described drill bit 3 axis is 50 °, the tapered shape of slag-discharging nozzle 31, to strengthen jet impact force.
In the present embodiment, described slag-discharging nozzle 31 is arranged in equally spaced manner, and is circumferentially symmetrical arranged at least two in same longitudinal section; Slag-discharging nozzle 31 can arrange equally spaced many groups, often organizes equal circumference and is uniformly distributed, to form uniform impact force when rotated.
In the present embodiment, described side direction nozzle also comprises the reaming jet nozzle 32 offered along described drill bit 3 radial direction, before described reaming jet nozzle 32 is located at described slag-discharging nozzle 31; Reaming jet nozzle 32 pairs of surrounding coal bodies form radial impact power, are conducive to expanding bore diameter; Before reaming jet nozzle 32 is located at slag-discharging nozzle 31, comprehensive crushing force can be strengthened, also can avoid affecting the impetus to cinder.
In the present embodiment, described reaming jet nozzle 32 is arranged in equally spaced manner, and is circumferentially symmetrical arranged at least two in same longitudinal section; Reaming jet nozzle 3 can arrange equally spaced many groups, often organizes equal circumference and is uniformly distributed, to form uniform impact force when rotated.
In the present embodiment, described drill bit 3 front end evenly arranges at least three by Central Symmetry and bores tooth 3a, described propulsion nozzle comprises be located at described drill bit 3 center straight to nozzle 33 and the oblique nozzle (not shown) be located between each described brill tooth 3a, and the angle between described oblique nozzle-axis and described drill bit 3 axis is 35 °, boring tooth 3a utilizes the mechanical movement of rig 1 driving to realize borehole axial cutting coal, strengthens the abrasive action of drill bit 3, Main Function directly to nozzle 10 makes hole ground coal body broken in advance, reduces the grinding difficulty of boring tooth 3a, improve drilling efficiency, drill bit 3 additionally uses the oblique nozzle that quantity is identical with the quantity of boring tooth 3a, oblique nozzle to be arranged between adjacent brill tooth 3a and to be uniformly distributed on the front end face of drill bit 3, angle is there is between the axis of oblique nozzle and the axis of drill bit 3, along water outlet direction, the angular range of this angle is 10 °-60 °, the Main Function of oblique nozzle is formed to have tangential rotating jet under drill bit 3 rotarily drives effect, at the bottom of drilling hole and under the comprehensive crushing force effect that applies at rotating jet of hole wall coal body, coal body is produced to destroy, reach the effect of creeping into reaming simultaneously.
In the present embodiment, described chicksan 5 comprises housing 51, bearing 52, the axis of rotation 54 of sealing ring 53 and hollow, flange plate structure is processed at described housing 51 two ends, described axis of rotation 54 is arranged on described housing 51 inside and can coordinates with described bearing 52 under external force and realizes axial-rotation, described bearing 52, axis of rotation 54 is sealed by sealing ring 53 with the junction of described housing 51, one end of described axis of rotation 54 is connected with described drilling rod 2, the other end is fixedly connected with described high-pressure rubber pipe 43, described housing 51 has the oilhole 55 passing to described bearing 52, drilling and carrying out in high-pressure hydraulic punching, expansion process, chicksan 5 can ensure that drilling rod 2 connects in high-pressure rubber pipe 43 process and can rotate, and good airproof performance, high pressure resistant, bearing 52 can use ball bearing, and sealing ring 53 can select O type circle, oilhole 55 comprises tank filler sleeve and oil leak hole, opens tank filler sleeve and is convenient to add neat lubricant oil to ensure the verticity of bearing 52, axis of rotation 54 in good time, open oil leak hole and be convenient to draining.
In the present embodiment, the connection between described drill bit 3 and drilling rod 2, and the connection successively when lengthening described drilling rod 2 length between many described drilling rods 2 head and the tail all adopts built-in crush seal connected mode; When carrying out high-pressure water jet coal seam drilling hole, the pressure of working media is higher, during boring, most place is all adopt manual operation, thus require that high pressure drilling rod will have the welding of enough compressive strength, its joint and sealing to have strict demand, by adopting crush seal, sealing performance can reach desirable effect.
In the present embodiment, be connected by snap joint 6 between described high-pressure rubber pipe 43 with described chicksan 5, be convenient to Fast Installation.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.

Claims (9)

1. a colliery layer-through drilling high-pressure water jet drilling and expanding apparatus, comprise rig, high-pressure water shot streaming system, drilling rod and be connected the drill bit communicated with described drilling rod, described rig drives described drilling rod rotate and pierce colliery layer, described high-pressure water shot streaming system comprises the water tank connected successively, high-pressure hydraulic pump and high-pressure rubber pipe, described high-pressure rubber pipe to be connected with the afterbody of described drilling rod by chicksan and to communicate, described drill bit is provided with the nozzle for water under high pressure injection, described drill bit can rotate from axle under the rotarily driving of described drilling rod, it is characterized in that: described nozzle comprises the propulsion nozzle being located at described chisel edge and the side direction nozzle being located at described drill bit sidewall, described side direction nozzle comprises the slag-discharging nozzle favouring described drill axis and offer backward, described propulsion nozzle comprises be located at described bit central straight to nozzle and the oblique nozzle be located between each brill tooth.
2. colliery according to claim 1 layer-through drilling high-pressure water jet drilling and expanding apparatus, is characterized in that: the angle between described slag-discharging nozzle axis and described drill axis is 30 °-70 °.
3. colliery according to claim 2 layer-through drilling high-pressure water jet drilling and expanding apparatus, is characterized in that: described slag-discharging nozzle is arranged in equally spaced manner, and is circumferentially symmetrical arranged at least two in same longitudinal section.
4. colliery according to claim 1 layer-through drilling high-pressure water jet drilling and expanding apparatus, is characterized in that: described side direction nozzle also comprises the reaming jet nozzle offered along described drill bit radial direction, before described reaming jet nozzle is located at described slag-discharging nozzle.
5. colliery according to claim 4 layer-through drilling high-pressure water jet drilling and expanding apparatus, is characterized in that: described reaming jet nozzle is arranged in equally spaced manner, and is circumferentially symmetrical arranged at least two in same longitudinal section.
6. colliery according to claim 1 layer-through drilling high-pressure water jet drilling and expanding apparatus, it is characterized in that: described chisel edge evenly arranges at least three by Central Symmetry and bores tooth, and the angle between described oblique nozzle-axis and described drill axis is 10 °-60 °.
7. colliery according to any one of claim 1 to 6 layer-through drilling high-pressure water jet drilling and expanding apparatus, it is characterized in that: described chicksan comprises housing, bearing, the axis of rotation of sealing ring and hollow, flange plate structure is processed at described housing two ends, described axis of rotation is arranged on described enclosure interior and can realizes axial-rotation with described bearing fit under external force, described bearing, the junction of axis of rotation and described housing is sealed by sealing ring, one end of described axis of rotation is connected with described drilling rod, the other end is fixedly connected with described high-pressure rubber pipe, described housing has the oilhole passing to described bearing.
8. colliery according to any one of claim 1 to 6 layer-through drilling high-pressure water jet drilling and expanding apparatus, it is characterized in that: the connection between described drill bit and drilling rod, and the connection successively when lengthening described run of steel between many described drilling rods head and the tail all adopts built-in crush seal connected mode.
9. colliery according to any one of claim 1 to 6 layer-through drilling high-pressure water jet drilling and expanding apparatus, is characterized in that: described high-pressure rubber pipe is connected by snap joint with between chicksan.
CN201420200796.0U 2014-04-22 2014-04-22 Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus CN204060514U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420200796.0U CN204060514U (en) 2014-04-22 2014-04-22 Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420200796.0U CN204060514U (en) 2014-04-22 2014-04-22 Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus

Publications (1)

Publication Number Publication Date
CN204060514U true CN204060514U (en) 2014-12-31

Family

ID=52202053

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420200796.0U CN204060514U (en) 2014-04-22 2014-04-22 Colliery layer-through drilling high-pressure water jet drilling and expanding apparatus

Country Status (1)

Country Link
CN (1) CN204060514U (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563899A (en) * 2015-01-08 2015-04-29 赵津梁 Continuous drill pipe under pressure, swing-jet grouting device using drill pipe and swing-jet grouting construction method
CN105317380A (en) * 2015-07-03 2016-02-10 河南焦煤能源有限公司科学技术研究所 Integrated flow-variable drilling and punching nozzle
CN105464596A (en) * 2015-12-29 2016-04-06 河南理工大学 Metering system and method for hydraulic reaming pressure-relief permeability-enhancing reaming coal quantity
CN106150500A (en) * 2016-08-26 2016-11-23 中煤科工集团重庆研究院有限公司 Ultrahigh pressure bores, expands, cuts integrated apparatus
CN106223861A (en) * 2016-08-29 2016-12-14 中煤科工集团重庆研究院有限公司 Ultrahigh pressure bores, expand, cut bit Integrated
CN106988680A (en) * 2017-05-27 2017-07-28 湖南科技大学 Ice pellets abradant jet Aided Machine drills and coal seam cutting method
CN107023295A (en) * 2017-04-14 2017-08-08 华北科技学院 A kind of hard coal erosion control destressing borehole construction method and equipment
CN107178307A (en) * 2017-05-10 2017-09-19 刘丽娟 A kind of Assembled punch for water conservancy construction
WO2018121815A1 (en) * 2016-12-30 2018-07-05 Hochschule Bochum Drilling device
WO2021008212A1 (en) * 2019-07-15 2021-01-21 中国矿业大学 High-pressure water-powered precise coal crushing and filling mining method in inclined coal seam

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563899A (en) * 2015-01-08 2015-04-29 赵津梁 Continuous drill pipe under pressure, swing-jet grouting device using drill pipe and swing-jet grouting construction method
CN104563899B (en) * 2015-01-08 2017-09-12 赵津梁 Drilling rod and the pendulum spray apparatus and pendulum spraying construction method using the drilling rod with pressure of continuing
CN105317380A (en) * 2015-07-03 2016-02-10 河南焦煤能源有限公司科学技术研究所 Integrated flow-variable drilling and punching nozzle
CN105317380B (en) * 2015-07-03 2017-08-08 河南焦煤能源有限公司科学技术研究所 A kind of variable-flow bores and rushes unitary nozzle
CN105464596B (en) * 2015-12-29 2018-03-23 河南理工大学 The metering system and metering method for expansion coal amount that hydraulic reaming release is anti-reflection
CN105464596A (en) * 2015-12-29 2016-04-06 河南理工大学 Metering system and method for hydraulic reaming pressure-relief permeability-enhancing reaming coal quantity
CN106150500A (en) * 2016-08-26 2016-11-23 中煤科工集团重庆研究院有限公司 Ultrahigh pressure bores, expands, cuts integrated apparatus
CN106223861B (en) * 2016-08-29 2019-01-01 中煤科工集团重庆研究院有限公司 Ultrahigh pressure bores, expands, it is bit Integrated to cut
CN106223861A (en) * 2016-08-29 2016-12-14 中煤科工集团重庆研究院有限公司 Ultrahigh pressure bores, expand, cut bit Integrated
WO2018121815A1 (en) * 2016-12-30 2018-07-05 Hochschule Bochum Drilling device
CN107023295A (en) * 2017-04-14 2017-08-08 华北科技学院 A kind of hard coal erosion control destressing borehole construction method and equipment
CN107178307A (en) * 2017-05-10 2017-09-19 刘丽娟 A kind of Assembled punch for water conservancy construction
CN106988680A (en) * 2017-05-27 2017-07-28 湖南科技大学 Ice pellets abradant jet Aided Machine drills and coal seam cutting method
WO2021008212A1 (en) * 2019-07-15 2021-01-21 中国矿业大学 High-pressure water-powered precise coal crushing and filling mining method in inclined coal seam

Similar Documents

Publication Publication Date Title
CN202337979U (en) Air slurry separation device and drill rod combination structure with same
CN105156085B (en) The coal mine underground coal bed tree-shaped uniform anti-reflection method of drilling composite fracturing
CN103362516B (en) Combined type shield tunneling machine
CN102080525B (en) High-pressure gas injection hole-drilling pressure-releasing outburst prevention method
CN102747953B (en) Multiple step type drilling and protecting integrated system and process for soft coal seam
CN102155254A (en) Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection
CN101614133A (en) High pressure jet drilling and slotting integration pressure-release anti-burst method
CN202117705U (en) Water cutting device for converting high pressure and low pressure
CN1959058B (en) Rotary dual jet flows boring method under high pressure
CN103206190B (en) Fast aeration slip-casting hole-sealing method
CN102434102B (en) Pulse cavitation multiple jet nozzle
CN104358514B (en) A kind of underground coal mine nearly horizontal orientation long drilled holes pressure control drilling system and method
CN203499569U (en) Water-pressure-controlled drilling and blanking integrated efficient drill bit
CN101718191A (en) Directional cracking method for waterpower slotting
CN103835653B (en) Self-advancing type landwaste abrasive material direct rotary mixing jet drill bit
CN102418549B (en) Technical method for extracting coal bed methane from constructed coal development area
CN202990851U (en) Screw type high-frequency percussion drilling tool
CN100485163C (en) Coal bed gas drainage method and device
CN206352481U (en) Pipe-following drilling system and the anti-collapse aperture apparatus of steel floral tube
CN105134127B (en) A kind of anti-collapse grouting reinforcement device and its application method
CN103061798B (en) Down-hole concordant long drilled holes consecutive makes cave extraction coal bed gas method
CN202039854U (en) Novel cutter disk of shield machine
CN105239928B (en) Ultrahigh-pressure swirling abrasive water jet drilling machine
CN202325239U (en) Hydraulic jetting radial drilling device
CN201424940Y (en) Mud cake prevention device for slurry shield machine

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant