[go: up one dir, main page]

CN105484686A - Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device - Google Patents

Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device Download PDF

Info

Publication number
CN105484686A
CN105484686A CN201510871685.1A CN201510871685A CN105484686A CN 105484686 A CN105484686 A CN 105484686A CN 201510871685 A CN201510871685 A CN 201510871685A CN 105484686 A CN105484686 A CN 105484686A
Authority
CN
China
Prior art keywords
cylinder type
collect plant
dust collect
type hydraulic
aperture
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.)
Pending
Application number
CN201510871685.1A
Other languages
Chinese (zh)
Inventor
许帮贵
陈家祥
李建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaibei Mining Co Ltd
Original Assignee
Huaibei Mining Co Ltd
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 Huaibei Mining Co Ltd filed Critical Huaibei Mining Co Ltd
Priority to CN201510871685.1A priority Critical patent/CN105484686A/en
Publication of CN105484686A publication Critical patent/CN105484686A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/01Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
    • E21B21/011Dust eliminating or dust removing while drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/01Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
    • E21B21/015Means engaging the bore entrance, e.g. hoods for collecting dust

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a coal road dry type drill hole oil cylinder type automatic propelling dust collecting device which comprises a drilling machine, an oil cylinder type hydraulic propelling device, an orifice dust collecting device and a fixing and connecting device. The oil cylinder type hydraulic propelling device is fixed to the tail end of the drilling machine through a fixing base assembly and a bolt. The orifice dust collecting device and the oil cylinder type hydraulic propelling device fixed to the tail end of the drilling machine are connected into a whole through a bolt and screw member. A correcting and adjusting plate enables the drilling machine, the oil cylinder type hydraulic propelling device, the orifice dust collecting device and a drill rod of the drilling machine to be kept on the same axis. The orifice dust collecting device comprises a conical front part and a cylindrical rear part. The cylindrical rear part is connected to the front end of the oil cylinder type hydraulic propelling device. A ring-shaped groove is formed in the outer side wall of the middle of the orifice dust collecting device. As the oil cylinder type hydraulic propelling device is arranged and utilized for automatically conveying the orifice dust collecting device to the position, to be opened, of a drill hole, the technical problem that the orifice dust collecting device for the drill hole is difficult to install is solved.

Description

A kind of coal road dry drilling cylinder type advances dust collect plant automatically
Technical field
The invention belongs to mine gas or dust prevention and control field, particularly the multi-functional coal road dry drilling cylinder type of a kind of colliery coal dust, gas and protrusion-dispelling advances dust collect plant automatically.
Background technology
In coal roadway drilling construction, a large amount of coal dust and high concentration gas are gushed out and are caused the oxygen content in underground coal mine air reduce and affect health; Also can cause causing a large amount of casualtiess and mine facility to destroy because of coal dust, gas combustion or explosion accident.
Existing coal bed drilling aperture, colliery dust collect plant needs manually to do brill nest in advance at aperture position, be inserted in advance to bore in nest and fix, then connect all the other flexible pipes etc., both wasted time and energy, again when opening absolute altitude is higher than staff, aperture dust collect plant is then thrown in too late by staff.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of coal road dry drilling cylinder type collected coal dust, gas and have protrusion-dispelling function concurrently and automatically advance dust collect plant, be intended to effectively solve wasting time and energy and the difficult problem having input too late of the existing artificial boring input in colliery, for pre-coal dust control and gas explosion accident, the generation of coal and gas prominent accident and operating environment optimization provide safety guarantee and advantage.
The technical scheme that the present invention realizes above-mentioned purpose is as follows:
A kind of coal road dry drilling cylinder type advances dust collect plant automatically, it comprises rig, cylinder type hydraulic feed device, aperture dust collect plant and fixed connection apparatus five parts, described cylinder type hydraulic feed device is by holder assembly and the end being bolted to rig, before drilling machine construction, aperture dust collect plant and the cylinder type hydraulic feed device bolt screw component being fixed on rig end are linked into an integrated entity, the correction adjustment plate be fixed on holder assembly is utilized to make described rig, cylinder type hydraulic feed device, the drilling rod of aperture dust collect plant and rig all keeps on the same axis, wherein aperture dust collect plant comprises conical forward portion and cylindrical rear, cylindrical rear is connected to the front end of cylinder type hydraulic feed device, in the middle part of the dust collect plant of aperture, lateral wall establishes annular groove, being convenient to movable protrusion-dispelling baffle plate inlays wherein, for when avoiding drilling rod deflection and metal to rub the harm examined and produce spark and cause gas explosion disaster.
Further, also comprise movable protrusion-dispelling baffle plate, described movable protrusion-dispelling baffle plate is embedded in the annular groove on the middle part lateral wall of described aperture dust collect plant.
Further, at movable protrusion-dispelling baffle plate by rib side, hard rubber in fixing one deck so that with irregular rib close contact, protrusion-dispelling baffle plate and aperture dust collect plant adopt screw rod to fix, and are convenient to load and unload.Permanent position is aperture dust collect plant.
Further, described cylindrical rear, upper end arranges the connecting interface be connected with dust flexible pipe with guiding gas, dress pressure wind inlet I inside interface, lower end arranges cinder scavenge port, pressure wind inlet I is convenient to form wind jet zone of positive pressure, guides in connecting hose, and reduce gathering of aperture dust collect plant rear end coal dust by the coal dust etc. that aperture blows out; Cinder scavenge port is convenient to be connected with the connecting hose of collection slag cloth bag and dust arrester.
Further, porous inner ring is set in described cylindrical rear, and pressure wind inlet II is set, form air curtain system, operationally to rely on pressure wind to form air curtain wall stop that the coal dust that aperture blows out directly enters in coal road through the gap between drilling rod and aperture dust collect plant.
Further, described cylinder type hydraulic propelling system comprises the total part of first-stage cylinder, the total part of secondary cylinder and cuts off parts; Every grade of oil cylinder forms by cylinder bottom, cylinder barrel, cylinder cap, piston, piston rod and fairlead; Utilizing drilling rig hydraulic system to draw a branch road provides the hydraulic oil of certain pressure to promote the piston of oil cylinder, piston rod movement and realize automatic propulsion functions to this two-level oil cylinder; Described cylinder type hydraulic feed device is circular configuration, and outer wall is provided with oil-in and oil-out.
Described fastening devices, comprise and correct adjustment plate, holder assembly and bolt screw, described holder assembly is installed on drill spindle end, described correction adjustment plate is arranged on the clamper of rig in company with holder assembly, according to the different structure form of different model rig end of coal roadway drilling construction, compliance and the flexibility strong fastening devices being convenient to load and unload is adopted to be fixed on the clamper of rig end by cylinder type hydraulic feed device.
Described aperture dust collect plant, and copper alloy processing and fabricating of high strength wear-resisting by circle forms, front end is tapered, be convenient to insert in coal body, rear end is circular, and is connected with cylinder type hydraulic feed device, and hollow, be convenient to drilling rod through and rotation, contact to rub to examine with aperture dust collect plant once boring and do not produce spark.
Described movable protrusion-dispelling baffle plate, is fixed on the dust collect plant of aperture, according to the soft or hard degree determination different size in drilling construction row and coal seam, guarantees effectively to stop that rib is caving.
Described cylinder type hydraulic feed device, utilizes the hydraulic system of rig own to draw a branch, and supply cylinder type hydraulic propelling system oil-feed and fuel-displaced oil circuit, its maximum hydraulic pressure oil pressure is 10MPa.
The pressure wind of this device is provided by the air line being supplied to borer system at mine, draws other two branch roads wherein: a branch road to being supplied to the air curtain ring of aperture dust collect plant to press wind, to form air curtain wall; Another branch road, by dust collect plant upper end, aperture and flexible pipe connecting interface, forms positive wine pressure and is imported in connecting hose by aperture coal dust gas.
Beneficial effect of the present invention is:
(1) the present invention arranges cylinder type hydraulic feed device, utilizes cylinder type hydraulic feed device that aperture dust collect plant is delivered to boring automatically and treats aperture position place, solves drilling orifice dust collect plant and installs difficult technical problem.
(2) stable hydraulic that the present invention is provided by the protrusion-dispelling plate on the dust collect plant of aperture and cylinder type hydraulic feed device feeds power to realize protrusion-dispelling function, effectively can stop that rib is caving and because of the coal and gas prominent that brings out of holing.
(3) aperture of the present invention dust collect plant and air curtain system have been worked in coordination with and have been collected and dust-break work, aperture dust collect plant is adopted to collect in drilling construction process because of the cinder of pressure wind discharge, coal dust and gas, its loss from the gap between drilling rod and dust collect plant, in coal road air, substantially improves the environment of coal roadway drilling construction to utilize air curtain principle to stop.
Accompanying drawing explanation
Fig. 1 is longitudinal sectional drawing of the present invention.
Fig. 2 is horizontal projection of the present invention.
Fig. 3 is transverse cross-sectional view of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1,2 and 3, apparatus of the present invention main part comprises rig 1, cylinder type hydraulic feed device 2 and aperture dust collect plant 3, cylinder type hydraulic feed device 2 is fixed on the end (i.e. gripper position) of rig 1 by fastening devices, described aperture dust collect plant 3 comprises conical forward portion and cylindrical rear, described cylindrical rear is connected by bolt screw with cylinder type hydraulic feed device 2, and the drilling rod of described cylinder type hydraulic feed device 2 and aperture dust collect plant 3 and rig 1 is on same main shaft 4.
Aperture dust collect plant 3 is formed by the circular copper alloy tube processing and fabricating of high-strength wearable, and front end is tapered, is convenient to insert in coal body, and rear end is cylindrical, and is connected with cylinder type hydraulic feed device, and hollow, be convenient to drilling rod and pass and rotation.
Described fastening devices comprises correction adjustment plate 5, holder assembly 6 and bolt screw, and described holder assembly 6 is installed on rig 1 spindle nose, and described correction adjustment plate 5 is arranged on the clamper of rig 1 in company with holder assembly 6.
Also comprise movable protrusion-dispelling baffle plate 10, described movable protrusion-dispelling baffle plate 10 is embedded in the annular groove on the middle part lateral wall of aperture dust collect plant 3.
Dust collect plant center, aperture is provided with endoporus in the axial direction, facilitates drilling rod to pass through wherein; The cylindrical rear of aperture dust collect plant, upper end arranges pressure wind inlet I13, and lower end arranges cinder scavenge port, and pressure wind inlet I13 is convenient to form positive wine pressure, aperture coal dust gas imports in the connecting hose of dust arrester by positive wine pressure, and reduces gathering of aperture dust collect plant rear end coal dust; Cinder scavenge port is convenient to be connected with the connecting hose of collection slag cloth bag and dust arrester.
Porous inner ring is set in the cylindrical rear of aperture dust collect plant, and pressure wind inlet II12 is set, form air curtain system, operationally to rely on pressure wind to form air curtain wall stop that the coal dust that aperture blows out directly enters in coal road through the gap between drilling rod and aperture dust collect plant.
Described cylinder type hydraulic feed device comprises the total part of first-stage cylinder 7, the total part 8 of secondary cylinder and cuts off parts 9; Described cylinder type hydraulic feed device is circular configuration, and outer wall is provided with oil-in and oil-out, and links up with the hydraulic oil pipe system of rig.
The material of described aperture dust collect plant adopts the alloy copper pipe of high-strength abrasion-proof, has both ensured its high intensity, and deviation and its inner chamber rub unlikely generation spark when examining to avoid again its drilling rod to occur.
The I and II cylinder body length direction of described cylinder type hydraulic feed device controls as far as possible within 1.2m, to adapt to the use in the boring of coal road sidewall construction concordant.
Oil cylinder tight seal is got up by spring washer and packing ring etc. by described cylinder type hydraulic feed device, to adapt to underground coal dust pollution.
Described cylinder type hydraulic feed device two ends connect into an organic whole with the clamper of rig and aperture dust collect plant bolt screw fixation kit respectively.
The on-site construction operations step of apparatus of the present invention is as follows:
Step 1: prepare the various kinds of equipment facilities such as rig, hydraulic system, compressed-air system needed for coal roadway drilling.
Step 2: the utilization of the rear end of cylinder type hydraulic feed device of the present invention is fixedly connected with assembly and is fixed on the clamper of rig.
Step 3: utilize bolt connection assembly to be fixedly connected with the rear end of aperture dust collect plant the front end of cylinder type hydraulic feed device of the present invention.
Step 4: the groove location movable protrusion-dispelling baffle plate being arranged on aperture dust collect plant.
Step 5: primer fluid force feed way switch, makes cylinder type hydraulic feed device under oil pressure effect, aperture dust collect plant is advanced into boring aperture position along drill rod axis direction.
Step 6: start rod boring switch, while rod boring, cylinder type hydraulic feed device constantly increases the power of feeding, the front end of aperture dust collect plant is made to be inserted into coal body projected depth, on-the-spot to estimate protrusion-dispelling plate washer and rib close contact is advisable, and keep the masterpiece that feeds of this hydraulic circuit to be and the support force of rib close contact or barrier force, make that rib is unlikely to be caving or to stop coal and gas prominent.
Step 7: start compressed-air system branch switch, air curtain wall is started working, the malleation blowing of connecting hose is also started working.
Step 8: start rig switch, rig is constantly crept into, wind power slag-discharging system starts.Cinder at the bottom of drilling hole, coal dust and gas in pressure wind effect blowing down in the dust collect plant of aperture.The wind jet of Ya Feng fluerics, the rear portion formation of aperture dust collect plant, be then directed to coal dust and gas in the flexible pipe be connected with rear dust arrester.
Step 9: the porous air curtain ring being fixed on dust collect plant rear portion, aperture forms double-layer wind curtain wall under the effect of pressure wind, stop the coal dust at dust collect plant rear portion, aperture and gas from the gap between drilling rod and aperture dust collect plant inner chamber loss in coal road.

Claims (9)

1. a coal road dry drilling cylinder type advances dust collect plant automatically, it is characterized in that: it comprises rig, cylinder type hydraulic feed device, aperture dust collect plant and fixed connection apparatus five parts, described cylinder type hydraulic feed device is by holder assembly and the end being bolted to rig, described aperture dust collect plant is linked into an integrated entity by bolt screw component with the cylinder type hydraulic feed device being fixed on rig end, the correction adjustment plate be fixed on holder assembly makes described rig, cylinder type hydraulic feed device, the drilling rod of aperture dust collect plant and rig all keeps on the same axis, described aperture dust collect plant comprises conical forward portion and cylindrical rear, and cylindrical rear is connected to the front end of cylinder type hydraulic feed device, in the middle part of the dust collect plant of aperture, lateral wall establishes annular groove.
2. coal road dry drilling cylinder type according to claim 1 advances dust collect plant automatically, it is characterized in that: also comprise movable protrusion-dispelling baffle plate, and described movable protrusion-dispelling baffle plate is embedded in the annular groove on the middle part lateral wall of described aperture dust collect plant.
3. coal road dry drilling cylinder type according to claim 1 and 2 advances dust collect plant automatically, it is characterized in that: described cylindrical rear, upper end arranges the connecting interface be connected with dust flexible pipe with guiding gas, and dress pressure wind inlet I inside interface, lower end arranges cinder scavenge port.
4. coal road dry drilling cylinder type according to claim 3 advances dust collect plant automatically, it is characterized in that: arrange porous inner ring in described cylindrical rear, and arranges pressure wind inlet II, forms air curtain wall.
5. coal road dry drilling cylinder type according to claim 4 advances dust collect plant automatically, it is characterized in that: described fastening devices, comprise and correct adjustment plate, holder assembly and bolt screw, described holder assembly is installed on drill spindle end, and described correction adjustment plate is arranged on the clamper of rig in company with holder assembly.
6. coal road dry drilling cylinder type according to claim 5 advances dust collect plant automatically, it is characterized in that: described cylinder type hydraulic feed device comprises the total part of first-stage cylinder, the total part of secondary cylinder and cuts off parts; Every grade of oil cylinder forms by cylinder bottom, cylinder barrel, cylinder cap, piston, piston rod and fairlead; Utilizing drilling rig hydraulic system to draw a branch road provides the hydraulic oil of certain pressure to promote the piston of oil cylinder, piston rod movement and realize automatic propulsion functions to this two-level oil cylinder; Described cylinder type hydraulic feed device is circular configuration, and outer wall is provided with oil-in and oil-out.
7. coal road dry drilling cylinder type according to claim 6 advances dust collect plant automatically, it is characterized in that: described movable protrusion-dispelling baffle plate, fixes hard rubber in one deck by rib side.
8. coal road dry drilling cylinder type according to claim 7 advances dust collect plant automatically, it is characterized in that: described movable protrusion-dispelling baffle plate and aperture dust collect plant adopt screw rod to fix.
9. coal road dry drilling cylinder type according to claim 8 advances dust collect plant automatically, it is characterized in that: described aperture dust collect plant adopts the Cu alloy material of wear-resisting high-strength.
CN201510871685.1A 2015-12-02 2015-12-02 Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device Pending CN105484686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510871685.1A CN105484686A (en) 2015-12-02 2015-12-02 Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510871685.1A CN105484686A (en) 2015-12-02 2015-12-02 Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device

Publications (1)

Publication Number Publication Date
CN105484686A true CN105484686A (en) 2016-04-13

Family

ID=55671931

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510871685.1A Pending CN105484686A (en) 2015-12-02 2015-12-02 Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device

Country Status (1)

Country Link
CN (1) CN105484686A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107762431A (en) * 2016-08-22 2018-03-06 山特维克知识产权股份有限公司 Drifter drill for underground and its dust head device and component and dust collecting method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939392A2 (en) * 2006-12-28 2008-07-02 Shibuya Company, Ltd. Water treatment pad for core drill
CN102536231A (en) * 2012-02-27 2012-07-04 河南大有能源股份有限公司 Rapid propulsion system of drill mounted unit for coal mine
KR20150038815A (en) * 2013-09-30 2015-04-09 한국전력공사 Well cleaning device
CN204419085U (en) * 2015-01-27 2015-06-24 淮北矿业股份有限公司 The board-like dust arrester in coal road dry drilling aperture
CN204492706U (en) * 2014-12-20 2015-07-22 湖南科技大学 Coal roadway drilling construction protrusion-dispelling control of dust deslagging integrated apparatus
CN204591337U (en) * 2015-04-10 2015-08-26 湖南科技大学 A kind of coal road dry drilling aperture dust collect plant
CN204591189U (en) * 2015-01-28 2015-08-26 湖南科技大学 Coal road dry drilling aperture dust arrester hydrofeeder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939392A2 (en) * 2006-12-28 2008-07-02 Shibuya Company, Ltd. Water treatment pad for core drill
CN102536231A (en) * 2012-02-27 2012-07-04 河南大有能源股份有限公司 Rapid propulsion system of drill mounted unit for coal mine
KR20150038815A (en) * 2013-09-30 2015-04-09 한국전력공사 Well cleaning device
CN204492706U (en) * 2014-12-20 2015-07-22 湖南科技大学 Coal roadway drilling construction protrusion-dispelling control of dust deslagging integrated apparatus
CN204419085U (en) * 2015-01-27 2015-06-24 淮北矿业股份有限公司 The board-like dust arrester in coal road dry drilling aperture
CN204591189U (en) * 2015-01-28 2015-08-26 湖南科技大学 Coal road dry drilling aperture dust arrester hydrofeeder
CN204591337U (en) * 2015-04-10 2015-08-26 湖南科技大学 A kind of coal road dry drilling aperture dust collect plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107762431A (en) * 2016-08-22 2018-03-06 山特维克知识产权股份有限公司 Drifter drill for underground and its dust head device and component and dust collecting method
CN107762431B (en) * 2016-08-22 2021-10-15 山特维克知识产权股份有限公司 Underground drilling rig and dust collecting head device and assembly thereof, and dust collecting method

Similar Documents

Publication Publication Date Title
CN201810206U (en) High pressure water jet drilling and expanding integrated device
CN102797474B (en) Three-degree-of-freedom self-walking minitype shield machine
CN1455716A (en) Spindle device of machine tool
CN106150500A (en) Ultrahigh pressure hydraulic drilling, expanding and cutting integrated device
CN105525900A (en) Composite fracturing and uniform permeability increasing equipment for treelike drilling in coal seam of underground coal mine
CN110469297B (en) Device and method for completing long-distance sieve tube in coal mine underground gas extraction directional drilling
CN104453751A (en) Outburst-prevention, dust collection and slag discharging integrated device for coal roadway drilling construction
CN201391331Y (en) Coal seam drilling slotting and punching integrated hole drilling tool
CN103028755A (en) Method and device for improving processing efficiency of drilling machine
CN204492706U (en) Coal roadway drilling construction protrusion-dispelling control of dust deslagging integrated apparatus
CN202176271U (en) Air drill for gas drainage hole and venturi tube joint of air drill
CN105484686A (en) Coal road dry type drill hole oil cylinder type automatic propelling dust collecting device
CN202768008U (en) Three-degree-of-freedom self-walking mini-type shield mechanism
CN103801730B (en) For the conveying pressing mechanism of bearing ring rig
CN105156024A (en) Quick-percussion, wear-resistant and long-service-life down-the-hole percussive drill tool
CN104514504A (en) Drilling dust collection hood
CN105298975A (en) Pillared shoe cylinder
CN105239937B (en) Rig multifunctional manual clamper
CN104074516B (en) A kind of brill formula coal-winning machine filling drill bit
CN206707754U (en) A kind of coal mine drilling water filling slag-draining device
CN204552627U (en) A kind of wet drilling drilling rod
CN203030951U (en) Self-made pneumatic drilling machine
CN102128047A (en) Gas-slag separation and recovering system for drilling construction
CN105003216A (en) Orifice dust remover
CN205778536U (en) A kind of drilling in coal anti-blocking instrument of jet deslagging

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20160413

RJ01 Rejection of invention patent application after publication