CN103470297B - One is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof - Google Patents
One is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof Download PDFInfo
- Publication number
- CN103470297B CN103470297B CN201310408507.6A CN201310408507A CN103470297B CN 103470297 B CN103470297 B CN 103470297B CN 201310408507 A CN201310408507 A CN 201310408507A CN 103470297 B CN103470297 B CN 103470297B
- Authority
- CN
- China
- Prior art keywords
- water
- gas
- spray orifice
- separated
- discharger
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The invention discloses one to bore, take out, arrange integrated coal seam pressure relief permeability improvement device and using method thereof, this device comprises water jet high-low voltage switching device, anti-spray orifice guiding device, gas slag separation discharger.Described water jet high-low voltage switching device, between drill bit and drilling rod, can realize low pressure and creep into and switch flexibly with high-pressure water jet slot, punching; Described anti-spray orifice guiding device between drilling rod and boring, for the water cinder, the gas that sprays in boring being imported described gas slag separation discharger; Described gas slag is separated discharger and is connected with described anti-spray orifice guiding device by pipeline, for water cinder, gas being separated in enclosed environment, discharging.Package unit can realize high-low pressure and creep into flexible switching, and collected by gas slag in time, be separated and discharge, simple and reliable, installing/dismounting is simple and direct, conveniently repeatedly uses, the multiple bore operation in especially same job site.
Description
Technical field
The present invention relates to coal mining apparatus field, particularly one is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof.
Background technology
Spray orifice phenomenon is often there is in the waterpower measure work progresss such as the high-pressure water jet slot in the anti-reflection measure of current colliery local release or punching, once spray orifice is very easy to cause tunnel gas exceeding limit, and water cinder sprays everywhere and makes operating environment more severe.Blowout prevention hole packer conventional under current mine is a simple three-way device, device and drilling rod poorly sealed, contact not tight with boring, anti-spray orifice weak effect, notably whole device sprays boring along with the generation of extensive spray orifice, cause danger, when spray orifice is too serious, the effect eliminating gas exceeding limit can not be reached;
Simultaneously, the frequent phenomenon such as drilling rod is moved back in generation repeatedly, drill bit blocks, the high-pressure water jet pressure loss in high-pressure water jet slot or punching operation process, a kind of way is rushed bit Integrated as brill cuts or bores by upgrading drill bit, but above-mentioned bit Integrated complex structure, processing precise degree requires very high, causes involving great expense and is very easy to damage; Another kind of way is exactly simply ensure to creep in chisel edge perforate, arranges nozzle and realizes slot, but so greatly can lose the pressure of high-pressure water jet, do not reach slot or the punching requirement of expection in drill bit side.
In addition, when gas slag is separated, be stopped by simple baffle in hell major part, the water cinder around spray preventing hell from spraying, or utilize Simple water coal gas separator to derive, gas can not be discharged in time when running into spray orifice, cause tunnel gas exceeding limit.And water coal device separator needs labor cleaning's cinder, its pipeline connected easily blocks, and causes extraction thrashing.
Comprehensive above-mentioned reason, realizes common drilling construction and high-pressure water jet operating flexibility in the anti-reflection operation process of coal seam local release and switches, and do not lose high-pressure water shot flowing pressure; The water cinder that boring is discharged and gas are reliably derived, are collected, and separation automatically, discharge multifunctional all have important practical significance.
Summary of the invention
The object of the invention is to open one bore, take out, arrange integrated coal seam pressure relief permeability improvement device and using method thereof.
For achieving the above object, technical scheme of the present invention is: provide one to bore, take out, arrange integrated coal seam pressure relief permeability improvement device, comprises water jet high-low voltage switching device (24), anti-spray orifice guiding device (23), gas slag separation discharger (15);
Described water jet high-low voltage switching device (24), comprise linkage, high-low voltage switching device, nozzle (29), front end is connected with drill bit (1), and rear end is connected with drilling rod (25);
Described anti-spray orifice guiding device (23), comprise the sleeve (35) of band water conservancy diversion branch road, the capsule (3) of band water injection pipe (4), capsule liner (34), capsule crimp (33), is sleeved on the drill rod sealing device (5) of drilling rod (25) rear end;
Described gas slag is separated discharger (15) and is connected by the water conservancy diversion branch road (39) of pipeline with described anti-spray orifice guiding device (23), comprises and breathes buffer (13), water cinder automatic discharge device.
Preferably, described linkage is internal and external screw thread joint; Described switching device shifter (24) comprises the funnelform contraction door (31) of horizontal and switches steel ball (28), and described switching steel ball (28) diameter is large compared with described contraction door (31) minimum-value aperture; Described nozzle (29) diameter is 2 ~ 4mm.
Preferably, the capsule (3) of described band water injection pipe (4) is fixed on sleeve (35) front end of described band water conservancy diversion branch road by the capsule liner (34) under it and the capsule crimp (33) on it; Described drill rod sealing device (5) comprises drilling rod seal (37), drilling rod seal gland (38), both middle airtight and watertight paddings (36); Described drilling rod seal (37) is fixedly connected with described sleeve (35) inwall, described airtight and watertight padding (36) and drilling rod (25) interference fit.
Preferably, described breathing buffer (13), by flexible and have that good loft material makes, be separated remover (15) with described gas slag and be fixedly connected with; Described water cinder automatic discharge device is by motor (12), form with the slush pump (17) that motor output shaft is connected by connecting rod.
Preferably, described brill, take out, arrange the using method of integrated coal seam pressure relief permeability improvement device, comprise the steps:
First, common 1 ~ the 2m that drills, exit drill bit (1) and drilling rod (25), described water jet high-low voltage switching device (24) is installed between drill bit (1) and drilling rod (25), then the drilling rod (25) of band drill bit (1) is injected from anti-spray orifice guiding device (23) front end, anti-spray orifice guiding device (23) is inserted in boring (2) together with the drilling rod (25) of band drill bit (1);
Then, capsule (3) on anti-spray orifice guiding device (23) is all filled in boring, water filling (gas) from water filling (gas) pipe (4), pressure stops to during 2MPa, capsule (3) expands and boring (2) hole wall close contact, then regulate drill rod sealing device (5) that drilling rod (25) can freely be crept into, the water conservancy diversion branch road of anti-spray orifice guiding device (23) is separated discharger (15) with described gas slag and connects with pipeline;
Finally, the drainage tube (10) gas slag being separated discharger (15) is connected on mine gas extraction main line (8) by snap joint (11), the manual gas extruded in breathing buffer (13), makes it to be in contraction state, and scum pipe (14) outlet connects mine car.
beneficial effect
A technical scheme tool in technique scheme has the following advantages or beneficial effect:
Owing to have employed technique scheme, the present invention can realize low pressure and creep into flexible switching with high-pressure water jet slot or punching, high-pressure water pressure loss will be caused to affect the effect of water jet slot or punching because of the weep hole of drill bit; The water cinder sprayed from boring and gas are carried out being separated, collecting and discharging to corresponding receiving system through water conservancy diversion, the gas exceeding limit accident preventing spray orifice from causing, the main drainage tube of gas automatic suction mine, water cinder is automatically discharged and is entered mine car, effective preventing pollution environment on coalface; Whether determine the unlatching of slush pump by transparent observing room, avoid blindly operation; Breathe gas that the use of buffer effectively prevent the ejection of large-scale spray orifice to extract out in time and pour in tunnel and cause gas exceeding limit.Package unit processing procedure is carried out in totally sealed environment, can effectively prevent tunnel gas exceeding limit, ensures construction safety; To creep into or a large amount of high concentration gas that slot discharges enter main extraction pipeline, can for generating or civilian, energy conservation, protection of the environment; Avoid the working environment destruction that spray orifice causes; Reduce the labour intensity of cleaning tunnel water cinder, increase work efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention
Accompanying drawing 2 is the structural representation of high-low voltage switching device
Accompanying drawing 3 is the structural representation of anti-spray orifice guiding device
As shown in drawings, wherein: drill bit-1, boring-2, capsule-3, water filling (gas) pipe-4, drill rod sealing device-5, drill pipe clamp-6, water pigtail-7, extraction main line-8, rig-9, drainage tube-10, snap joint-11, motor-12, breathe buffer-13, scum pipe-14, gas slag is separated discharger-15, peep hole-16, slush pump-17, baffle plate-18, clean-out door-19, slag feed pipe-20, connecting line-21, rig bracket-22, anti-spray orifice guiding device-23, water jet high-low voltage switching device-24, drilling rod-25, male connection-26, drilling rod space-27, switch steel ball-28, nozzle-29, female adapter-30, shrink door-31, capsule crimp-32, capsule liner-33, sleeve-34, airtight and watertight padding-35, drilling rod seal-36, drilling rod seal gland-37, water conservancy diversion branch road-38, dredging pipe-39, sampling pipe-40.
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, simple introduction is done below by the accompanying drawing used required in embodiment or description of the prior art, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Detailed description of the invention
Below by specific embodiment, the present invention is further illustrated.Specific implementation process is as follows:
Package unit is carried out by the following method connect, assemble,
First, common 1 ~ the 2m that drills, exit drill bit 1 and drilling rod (25), described water jet high-low voltage switching device 24 is installed between drill bit 1 and drilling rod 25, then the drilling rod 25 of band drill bit 1 is injected from anti-spray orifice guiding device 23 front end, anti-spray orifice guiding device 23 is inserted in boring 2 together with the drilling rod 25 of band drill bit 1;
Then, capsule 3 on anti-spray orifice guiding device 23 is all filled in boring, water filling (gas) from water filling (gas) pipe 4, pressure stops to during 2MPa, capsule 3 expands and boring 2 hole wall close contacts, then regulate drill rod sealing device 5 that drilling rod 25 can freely be crept into, the water conservancy diversion branch road of anti-spray orifice guiding device 23 is separated discharger 15 with described gas slag and connects with pipeline;
Finally, the drainage tube 10 gas slag being separated discharger 15 is connected on mine gas extraction main line 8 by snap joint 11, manually extrudes the gas breathed in buffer 13, makes it to be in contraction state, and scum pipe 14 outlet connects mine car.
After package unit all connects, the water cinder quality of extracting out from scum pipe 14 differentiates the position that drill bit is deeply holed, when drill bit achieves the goal position, change water under high pressure into from water pigtail 7 and carry out hydraulic slotted liner technique or punching, fill in from drilling rod 2 and water pigtail 7 shaft connection place and switch steel ball 28, switch steel ball 28 and flow to contraction door 31 place with current along drilling rod space 27, block this door, water under high pressure can only spray from nozzle 29, under the operation of equal-wattage high-pressure pump, discharge reduction makes water jet pressure rise, realize height setting-out to switch, then high-pressure water jet slot or the anti-reflection operation of punching release is carried out.
Water cinders, gas that boring 2 is gushed out enter anti-spray orifice guiding device 23 from the space between boring 2 and drilling rod 25, because capsule 3 water filling (gas) is expanded afterwards, capsule 3 and boring 2 hole wall close contacts, capsule 3 produces distortion as flexible material and fully fits with hole wall wall under certain pressure effect, can effectively prevent methane gas from overflowing on the one hand, produce friction force with wall on the other hand, be ejected when preventing extensive spray orifice.Airtight and watertight padding 35 in sleeve 34 rear end drill rod sealing device 5 and drilling rod 25 interference fit, can prevent methane gas from overflowing from the gap between drilling rod 25 and sleeve 34 further; Drilling rod seal 36 embeds sleeve 34 inwall, be fixedly connected with, be reserved with and ensure that drilling rod 25 normally turns the gap of entering, water cinder moves to drilling rod seal 37 front end face to be stopped, and moves to airtight and watertight padding 35 front end face stop at least partially through the water cinder in gap between drilling rod seal 37 and drilling rod 25.This part not timely water cinder flowed out from water conservancy diversion branch road 38 can be used as sealant to a certain extent and seals.Water cinder, gas flow out from the water conservancy diversion branch road 38 of anti-spray orifice guiding device 23, flow into slag feed pipe 20 through connecting line 21, enter gas slag and are separated discharger 15.The methane gas of ejection enters extraction main line 20 from extraction pipeline 10, and water cinder then drives slush pump 17 to be discharged to the mine car of outside by scum pipe 14 by motor 12.Water cinder amount observed by the peep hole 16 being separated discharger by gas slag, controls the start and stop of motor 12.
When there is extensive spray orifice, baffle plate 18 stops that the large water gaging cinder of ejection prevents other components in its damage gas slag separating slag device 15.The gas that gas pumping pipe 10 can not be extracted out in time enters breathes buffer 13, plays cushioning effect through expansion air-breathing, and the gas collected of then slowly breathing out, extracts out from gas pumping pipe 10.Whole flow process is in sealing state, therefore can effectively prevent tunnel or local gas to transfinite accident, when avoiding spray orifice water cinder disorderly spray pollute working environment.
Package unit is after a drilling construction, and rig stops operating, and first cleans anti-spray orifice guiding device from dredging pipe, is then separated discharger, with waterproof cinder accumulated plugging associated pipe with water rinse water cinder from clean-out door.
Apply specific embodiment herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.The above is only the preferred embodiment of the present invention, should be understood that, due to the finiteness of literal expression, and objectively there is unlimited concrete structure, for those skilled in the art, under the premise without departing from the principles of the invention, some improvement, retouching or change can also be made, also above-mentioned technical characteristic can be combined by rights; These improve retouching, change or combination, or the design of invention and technical scheme are directly applied to other occasion without improving, and all should be considered as protection scope of the present invention.
Claims (1)
1. one kind is bored, takes out, arranges integrated coal seam pressure relief permeability improvement device, comprise water jet high-low voltage switching device (24), anti-spray orifice guiding device (23), gas slag separation discharger (15), described water jet high-low voltage switching device (24), comprise linkage, high-low voltage switching device, nozzle (29), front end is connected with drill bit (1), and rear end is connected with drilling rod (25); Described anti-spray orifice guiding device (23), comprise the sleeve (35) of band water conservancy diversion branch road, the capsule (3) of band water injection pipe (4), capsule liner (34), capsule crimp (33), is sleeved on the drill rod sealing device (5) of drilling rod (25) rear end; Described gas slag is separated discharger (15) and is connected by the water conservancy diversion branch road (39) of pipeline with described anti-spray orifice guiding device (23), it is characterized in that: described gas slag is separated discharger (15) and comprises breathing buffer (13), water cinder automatic discharge device, described breathing buffer (13), by flexible and have that good loft material makes, be separated remover (15) with described gas slag and be fixedly connected with; Described water cinder automatic discharge device is by motor (12), form with the slush pump (17) that motor output shaft is connected by connecting rod, water cinder drives slush pump (17) to be discharged by scum pipe (14) by motor 12, and gas slag is separated discharger and is provided with peep hole (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408507.6A CN103470297B (en) | 2013-09-10 | 2013-09-10 | One is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408507.6A CN103470297B (en) | 2013-09-10 | 2013-09-10 | One is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103470297A CN103470297A (en) | 2013-12-25 |
| CN103470297B true CN103470297B (en) | 2015-11-18 |
Family
ID=49795320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310408507.6A Expired - Fee Related CN103470297B (en) | 2013-09-10 | 2013-09-10 | One is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103470297B (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747071B (en) * | 2015-01-12 | 2016-10-19 | 徐州博安科技发展有限责任公司 | A kind of hydrodynamic force drilling slotting method |
| 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 |
| CN105370236B (en) * | 2015-12-11 | 2018-02-23 | 王士勇 | Blowout prevention aperture apparatus and drilling rig |
| CN106437599A (en) * | 2016-10-26 | 2017-02-22 | 淮北矿业股份有限公司 | Blowout preventing device for coal seam drilling |
| CN107806322B (en) * | 2017-10-31 | 2019-06-28 | 河南理工大学 | A kind of pipe-following drilling device |
| CN108150105B (en) * | 2017-12-25 | 2020-06-02 | 杨宏伟 | Dustless type water conservancy cutting perforator of environmental protection |
| CN108915760A (en) * | 2018-07-16 | 2018-11-30 | 贵州盘江精煤股份有限公司 | To hole pumping and mining method under a kind of underground coal mine |
| CN109209282A (en) * | 2018-11-07 | 2019-01-15 | 孔维 | Easy-to-use type drilling construction blowout hookup |
| CN109296319B (en) * | 2018-11-16 | 2020-01-14 | 河南理工大学 | Gas drainage hole drilling device |
| CN110242347B (en) * | 2019-07-01 | 2021-02-12 | 辽宁工程技术大学 | Construction method for integrally preventing and controlling coal and rock composite disasters through pressure relief, extraction and water injection |
| CN110617044B (en) * | 2019-07-23 | 2020-09-29 | 重庆大学 | Ultrahigh-pressure water jet slotting system and using method thereof |
| CN110500035B (en) * | 2019-09-09 | 2020-12-29 | 中煤科工集团西安研究院有限公司 | Drilling slag separating and transferring system and method for coal mine underground air directional drilling |
| CN110953013B (en) * | 2019-12-05 | 2021-03-19 | 中煤科工集团西安研究院有限公司 | Controllable jet flow punching pressure relief and permeability increase device and method for soft coal seam |
| CN110985111A (en) * | 2019-12-18 | 2020-04-10 | 苏三星 | Drilling, punching, screening and transporting integrated gas treatment method |
| CN111088993B (en) * | 2020-02-11 | 2020-12-08 | 山东科技大学 | Drilling-cutting-sealing-pressing drilling equipment and method for deep low-permeability high-gas coal seam |
| CN111577282A (en) * | 2020-05-26 | 2020-08-25 | 内蒙古福城矿业有限公司 | High-low negative pressure separate source coal mine gas drainage process |
| CN111911225B (en) * | 2020-09-11 | 2022-06-03 | 中煤科工集团重庆研究院有限公司 | Drilling and water injection integrated device and method for coal seam |
| CN112593999B (en) * | 2020-12-24 | 2023-04-25 | 山西晋煤集团技术研究院有限责任公司 | Directional long-drilling hydraulic permeability-increasing method for soft coal seam and/or soft and hard composite coal seam |
| CN112832703B (en) * | 2021-01-04 | 2022-10-25 | 中煤科工集团重庆研究院有限公司 | Hydraulic slotting and drilling coal cinder conveying and separating device |
| CN113417569B (en) * | 2021-07-12 | 2023-09-26 | 河南永锦能源有限公司云盖山煤矿一矿 | Coal mine water control and blowout prevention integrated device and manufacturing and using method thereof |
| CN113669058A (en) * | 2021-10-08 | 2021-11-19 | 冀中能源集团有限责任公司 | Anti-spraying coal mine underground high-pressure water jet cross-layer drilling coal breaking permeability increasing device |
| CN114412407B (en) * | 2021-12-30 | 2023-09-08 | 煤炭科学技术研究院有限公司 | Underground coal mine drilling sealing dust-falling blowout preventer |
| CN115199317B (en) * | 2022-07-14 | 2024-03-12 | 山西沁新能源集团股份有限公司 | Device and method for preventing overrun water, gas and slag separation during underground coal mine drilling |
| CN117514108B (en) * | 2023-11-20 | 2024-08-16 | 重庆大学 | Ultrasonic-hydraulic acupoint-making pressure-relief composite fracturing permeability-increasing system and application method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201391331Y (en) * | 2009-04-23 | 2010-01-27 | 河南理工大学 | Integral in-hole drilling tool for drilling slotting punched hole of coal seam |
| EP2192261A1 (en) * | 2008-11-27 | 2010-06-02 | HILTI Aktiengesellschaft | Method for anchoring an attachment element |
| CN101881150A (en) * | 2010-06-17 | 2010-11-10 | 山西潞安环保能源开发股份有限公司 | Hydraulic cutting nozzle with residue filer device |
| CN102392676A (en) * | 2011-09-14 | 2012-03-28 | 成都晟鑫机电设备有限公司 | Integrated device for separating gas, water and slag |
| CN103195470A (en) * | 2013-04-15 | 2013-07-10 | 双鸭山市吉昌机械制造有限公司 | Gas discharge collecting device for drilling construction |
-
2013
- 2013-09-10 CN CN201310408507.6A patent/CN103470297B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2192261A1 (en) * | 2008-11-27 | 2010-06-02 | HILTI Aktiengesellschaft | Method for anchoring an attachment element |
| CN201391331Y (en) * | 2009-04-23 | 2010-01-27 | 河南理工大学 | Integral in-hole drilling tool for drilling slotting punched hole of coal seam |
| CN101881150A (en) * | 2010-06-17 | 2010-11-10 | 山西潞安环保能源开发股份有限公司 | Hydraulic cutting nozzle with residue filer device |
| CN102392676A (en) * | 2011-09-14 | 2012-03-28 | 成都晟鑫机电设备有限公司 | Integrated device for separating gas, water and slag |
| CN103195470A (en) * | 2013-04-15 | 2013-07-10 | 双鸭山市吉昌机械制造有限公司 | Gas discharge collecting device for drilling construction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103470297A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103470297B (en) | One is bored, takes out, is arranged integrated coal seam pressure relief permeability improvement device and using method thereof | |
| CN205047207U (en) | Colliery binary channels segmentation in pit hydraulic fracturing device | |
| CN104879088B (en) | A kind of filling guard aperture method for hyposmosis weak seam mash gas pumping drilling | |
| CN110578505B (en) | Drilling deslagging and oscillation fracturing gas extraction system and method based on nano fluid | |
| CN202176355U (en) | Coal mine downhole drilling hole dust-reducing device | |
| CN104481580B (en) | A kind of down-hole coal bed mash gas pumping drilling restorative procedure and the device of use thereof | |
| CN201037427Y (en) | Extrusive danger coal bed safety guide spraying drilling device | |
| CN108547604A (en) | A kind of brill punching press integrated apparatus and method | |
| CN105298391A (en) | Drilling-punching integral construction method for gas extraction drill hole | |
| CN203655213U (en) | Blowout-preventing embedded flow guide device | |
| CN101586470B (en) | Advanced drilling method for high-pressure water-rich filling cavity | |
| CN204552809U (en) | Drill anti-spray orifice Pre-control System in a kind of colliery | |
| CN102996160A (en) | Safety protection device and method for slotting to increase permeability by water jet | |
| CN206942804U (en) | A kind of novel hydropower punching operation machine | |
| CN103306715B (en) | Gas extraction drilling orifice device and operating method thereof | |
| CN208416512U (en) | A kind of brill punching press integrated apparatus | |
| CN104564105B (en) | A kind of apparatus and method of two grades of sleeve pipes of seat earth grouting and reinforcing | |
| CN203879424U (en) | Novel continuous sand removal device for oil and water well | |
| CN111236954B (en) | Sand box counter-force device for shield initiation in tunnel and negative ring pipe piece dismantling method | |
| CN101881150A (en) | Hydraulic cutting nozzle with residue filer device | |
| CN202882810U (en) | Novel multifunctional dust falling device | |
| CN204532169U (en) | A kind of aperture gas drainage under suction dedusting blowout hookup | |
| CN108868702B (en) | Coal bed gas ultrasonic desorption drainage method | |
| CN203879533U (en) | Orifice dust removal device for coal seam drilled hole | |
| CN203531830U (en) | Expansion type anti-spraying hole sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 410004, No. 658 Jing Wan Road, Yuhua District, Hunan, Changsha Applicant after: HUNAN COAL SCIENCE RESEARCH INSTITUTE Address before: 410004, No. 658 Jing Wan Road, Yuhua District, Hunan, Changsha Applicant before: Coal Research Inst.,Hunan |
|
| CB03 | Change of inventor or designer information |
Inventor after: Huang Yuanyue Inventor after: Huang Haiyan Inventor after: Xu Quan Inventor after: Zhao Pengtao Inventor after: Huang Jue Inventor after: Xu Dongfang Inventor after: Huang Yuanyue, Huang Haiyan, Xu Quan, Zhao Pengtao, Huang Jue, Xu Dongfang, Qin Zhen Inventor before: Huang Yuanyue Inventor before: Huang Haiyan Inventor before: Xu Quan Inventor before: Liu Feifei Inventor before: Xu Dongfang Inventor before: Huang Yuanyue, Huang Haiyan, Xu Quan, Liu Feifei, Xu Dongfang, Tan Zuoya |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20190910 |