CN110273687A - A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming - Google Patents

A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming Download PDF

Info

Publication number
CN110273687A
CN110273687A CN201910552786.0A CN201910552786A CN110273687A CN 110273687 A CN110273687 A CN 110273687A CN 201910552786 A CN201910552786 A CN 201910552786A CN 110273687 A CN110273687 A CN 110273687A
Authority
CN
China
Prior art keywords
pipe
canopy
drilling
drilling rod
forming
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.)
Withdrawn
Application number
CN201910552786.0A
Other languages
Chinese (zh)
Inventor
周峰
李军
焦海涛
杨顺
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.)
Beijing Tian Heng Construction Group Co Ltd
Original Assignee
Beijing Tian Heng Construction Group 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 Beijing Tian Heng Construction Group Co Ltd filed Critical Beijing Tian Heng Construction Group Co Ltd
Priority to CN201910552786.0A priority Critical patent/CN110273687A/en
Publication of CN110273687A publication Critical patent/CN110273687A/en
Withdrawn legal-status Critical Current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
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/04Directional drilling
    • E21B7/046Directional drilling horizontal drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/04Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10Making by using boring or cutting machines
    • E21D9/1006Making by using boring or cutting machines with rotary cutting tools

Landscapes

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

Abstract

The invention discloses a kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming, realize that the canopy construction equipment of this method includes containing auger stem, horizontal directional drilling machine and guide instrument.Drilling diameter of the present invention is less than pipe canopy diameter, and pipe canopy is by rotation jacking hole, maximally reducing because of drilling bring sedimentation;Pipe canopy of the present invention can be set to floral tube, and by slip casting in pipe, the diffusion of floral tube slurries is more advantageous to settlement Control and the effect of canopy shield;The advanced pore-forming of auger stem of the present invention, canopy pipe constrain drilling rod advance, while canopy tube top into when, drilling rod constrain canopy pipe advance, and wired guide instrument monitoring in time correction, be conducive to the accuracy in pipe-s hed drilling direction;Drilling construction of the present invention does not need mud, avoids the trouble of the environmental pollution of mud bring and mud conditioning.

Description

A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming
Technical field
The present invention relates to a kind of pipe shed construction methods, especially a kind of to be conducive to settlement Control, be oriented to, the pipe of dry pore-forming Canopy construction method.It is primarily adapted for use in the soft layers such as sand, silt, clay layer.
Background technique
Barrel vault advanced support method is a kind of new technology that tunnel piercing is carried out in weak surrounding rock that developed recently gets up.Pipe Canopy drilling machine is the equipment of most critical in piped shed conslruction technology, and earliest piped shed conslruction is using common horizontal drill.With Pipe shed method widely apply, dedicated pipe shed drilling rig comes into being.Especially pipe shed method is used for Urban Underground boring construction, passes through Existing structure building, settling amount require control stringent.Auxiliary construction measure of the pipe canopy as tunneling primarily serves Anticollapse supporting protection work With, but be unfavorable factor for settlement Control.
Currently used pipe shed construction method is " wired guiding is once with pipe pipe shed construction method ", and this method is with pipe canopy Drilling rod manages interior and pipe outer ring-like slip casting using mud off pore-forming.Since pore-forming is greater than pipe canopy diameter, slip casting is difficult to this method Reach full, it is easy to cause road surface to settle, and construction needs mud, mud conditioning difficulty is big, be easy to cause environment dirty Dye.
Summary of the invention
In order to overcome existing Pipe Roofing Construction Technology, the drawbacks such as roadbed subsidence and environmental pollution are be easy to cause, the present invention provides A kind of dry pore-forming of pipe inside spin, wired guiding, the pipe shed construction method of hydraulic jacking.
The technical scheme adopted by the invention is that: one kind can the dry pore-forming pipe roof construction equipment of guide pipe inside spin, the equipment Including containing auger stem, horizontal directional drilling machine and guide instrument.Auger stem is made of drill bit 1 and spiral shaft, auger stem Guide instrument probe 2 is installed in interior forward end position, and guide instrument probe 2 connects guide instrument fuselage 11 by guide instrument cable 9;Level is fixed It include drive joint 5, rotating device fuselage 6, hydraulic device 7, guide rail 8, oil pump 12, console 10 and pipeline 13 to drilling machine, Drive joint 5 is driven by rotating device fuselage 6, and hydraulic device 7 is that rotating device fuselage 6 provides hydraulic-driven power;Rotating device Fuselage 6 is mounted on guide rail 8;Oil pump 12 is separately connected rotating device fuselage 6, hydraulic device 7 and console 10 by pipeline 13, Console 10 is connect by pipeline 13 with rotating device fuselage 6;When auger stem is installed on horizontal directional drill drive joint 5 When, it is passed through inside canopy pipe 4, carries out advanced dry pore-forming operation, when canopy pipe 4 is installed on horizontal directional drill drive joint, canopy pipe 4 Rotate jacking operation.
Drill bit 1 is process using steel plate and steel pipe, and lozenges is provided on drill bit 1, and lozenges uses straight less than pipe canopy The steel pipe 18 (maximum gauge that can be passed through out of pipe canopy is advisable) and 17 processing and fabricating of steel plate of diameter.Auger stem merogenesis screw thread connects It connects, inner hollow, be easily installed guide instrument probe and wear cable.
Drive joint 5 of the present invention can individually be connect with drilling rod 3, pipe canopy 4, to creep into and jacking construction.
Working principle of the present invention are as follows:
1, guide instrument probe is mounted on auger stem front end, and cable passes through inside auger stem, convenient for connection guide instrument Fuselage;
2, the auger stem that group installs probe is mounted on horizontal directional drill drive joint in place, passes through horizontal directional drill Machine transmission device drives auger, and rotation takes soil in advance inside pipe canopy, while being advanced by hydraulic device;
3, after creeping into a distance, auger and drive joint are detached from, and pipe canopy is installed to drive joint, are filled by transmission Set and hydraulic device along drilling rod rotation by canopy tube top into;
4, guide instrument cable is connected, guide instrument fuselage is fed back information to by drilling rod front end probe;
5, it is detached from canopy pipe and drive joint, guide instrument cable passes through the second section drilling rod, and connect with first segment drilling rod, simultaneously Drive joint is connected, deviation is shown according to guide instrument, is rectified a deviation in drilling by drill bit lozenges, to guarantee drilling side To.
6, after the completion of the second section rod boring, drive joint and drilling rod are detached from, double section tube canopy is connected, carries out pipe ceiling Into operation.
7,3,4,5,6 steps are repeated, until pipe canopy requires to set length.
Compared with prior art, beneficial effects of the present invention:
Drilling diameter of the present invention is less than pipe canopy diameter, and pipe canopy is by maximally reducing because of drilling in rotation jacking hole Bring sedimentation;Pipe canopy of the present invention can be set to floral tube, by slip casting in pipe, floral tube slurries diffusion be more advantageous to settlement Control and The effect of canopy shield;The advanced pore-forming of auger stem of the present invention, canopy pipe constrain drilling rod advance, while canopy tube top into when, drilling rod constrain canopy pipe Advance, and wired guide instrument monitoring correction in time, is conducive to the accuracy in pipe-s hed drilling direction;Drilling construction of the present invention is not required to Mud is wanted, the trouble of the environmental pollution of mud bring and mud conditioning is avoided.
Detailed description of the invention
Fig. 1 is pipe roof construction device systems schematic diagram;
Fig. 2 is drive connector schematic diagram;
Fig. 3 is augers schematic diagram;
Fig. 4 is drill bit cross-sectional view.
Fig. 5 is drill bit side view.
1. drill bit in figure, 2. guiding probes, 3. spiral shafts, 4. canopy pipes, 5. drive joints, 6. transmission device fuselages, 7. Hydraulic device, 8. guide rails, 9. guide instrument cables, 10. consoles, 11. guide instrument fuselages, 12. oil pumps, 13. pipelines, 14. drilling rods Connecting sleeve, 15. pipe canopy connecting sleeves, 16. transmission shafts, 17. steel plate lozenges, 18. semicircle steel pipes, 19. steel plates.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
If Fig. 1 is device therefor of the present invention, including horizontal directional drilling machine, auger stem and guide instrument.Wherein horizontal orientation Drilling machine includes drive joint 5, rotating device fuselage 6, hydraulic device 7, guide rail 8, oil pump 12, console 10 and 13 groups of pipeline At;Auger stem is made of drill bit 1 and spiral shaft 2;Guide instrument is made of probe 2, cable 9 and guide instrument fuselage 11.Work When transmission device and hydraulic device urged by console control oil pump run, drive joint connects auger stem and hydraulic device Collective effect drilling and forming hole;After one section of drilling, drive joint and auger stem are detached from, and are installed a section pipe canopy and are connected with drive joint It connects, jacking tube canopy is rotated by transmission device and hydraulic device collective effect;Guide instrument cable is connected, is mentioned by guide instrument instrument Show angular deviation in next drilling process by the jacking of drill bit lozenges rectify a deviation, circulation procedure above until pipe roof construction just Drilling rod and drill bit are exited by hydraulic device in position, and pipe-s hed drilling construction is completed.
If Fig. 2 is horizontal directional drilling machine drive joint, drive joint includes transmission shaft 16, drilling rod connecting sleeve 14, Guan Peng Connecting sleeve 15.The drilling rod and pipe canopy connecting sleeve of drive joint are selected according to the diameter of drilling rod and pipe canopy, in order to guarantee to creep into Intensity requirement, drilling rod connecting sleeve are welded on pipe canopy connecting sleeve inner face, two casings directly with transmission shaft firm welding.
It as in Figure 3-5, is the present invention and prior art main difference place: auger, including drill bit 1 and spiral shaft 3 two parts.The thick steel plate and steel-pipe welding that wherein drill bit tip selects hardness big form, and diameter of steel tube is less than pipe canopy diameter, choosing It is advisable with the steel pipe for the maximum gauge that can be passed through out of pipe canopy pipe;Jail is welded with auger stem after the completion of the welding processing of drill bit tip Gu drilling rod inner hollow, is easily installed guiding probe and wire line, end mantle fiber connects convenient for next section drilling rod.
For the ease of object above realization, drilling machine, oil pump, hydraulic device need to be according to the sizes of pipe canopy diameter, drilling length The applicable specifications and models of equal specific requirements selection, construct to meet and provide sufficient torque, top power.One kind can spiral shell in guide pipe It is spin-dried for pore-forming pipe shed construction method, specific implementation step is as follows:
(1) installing pipe canopy equipment, connection electric line and oil pump pipeline carry out equipment debugging according to field condition.Simultaneously According to pin adjustment guide rail and orientation outside pipe canopy hole location and pipe roof construction, prepare for drilling.
(2) suitable augers and drilling rod are selected according to pipe canopy diameter, the installation guiding probe inside drill bit shaft, Guarantee that probe and drilling rod are concentric.Jointed rod and driving head, make the drill bit tip being installed and lozenges vertically upward or Lozenges direction is determined when downward, to facilitate correction.
(3) drilling rod and guide device debugging are completed, the first section rod boring construction of progress, after pore-forming, lay down drilling rod, transmission fills It postpones and moves back, canopy pipe is inserted in drilling rod, connects canopy pipe and drive joint, carry out first section canopy pipe and rotate jacking;Head section canopy pipe requires short Yu Shoujie drilling rod, canopy tube top, which proceeds at first section drilling rod jointing, to be stopped.
(4) drive joint is detached from canopy pipe, connection guiding probe and guide instrument route, determines drilling deviation situation, calculates inclined Poor orientation and angle.
(5) next section drilling rod is installed, is rectified a deviation according to when calculating deviation situation drilling.
(6) (3), (4), (5) step operation are repeated, until the construction of single pipe-s hed drilling is completed.
(7) nozzle closure is carried out after the completion of drilling, is reserved gas vent, is carried out slip casting in pipe.After gas vent returns slurry, close Gas vent continues grouting under pressure, reach design grouting pressure and grouting amount reach design 80% or more grouting amount when (do not reach To design pressure, when grouting amount reaches 1.5 times of design grouting amount), terminate slip casting.
(8) drilling machine and guide rail position are adjusted, (3), (4), (5), (6), (7) step operation is repeated, carries out other pipe canopies and apply Work.

Claims (4)

1. one kind can the dry pore-forming pipe roof construction equipment of guide pipe inside spin, it is characterised in that: the equipment include containing auger stem, Horizontal directional drilling machine and guide instrument;Auger stem is made of drill bit (1) and spiral shaft, the installation of auger stem interior forward end position Guide instrument probe (2), guide instrument probe (2) pass through guide instrument cable (9) connection guide instrument fuselage (11);Horizontal directional drilling machine packet Include drive joint (5), rotating device fuselage (6), hydraulic device (7), guide rail (8), oil pump (12), console (10) and pipeline (13), drive joint (5) is driven by rotating device fuselage (6), and hydraulic device (7) is that rotating device fuselage (6) provide hydraulic drive Power;Rotating device fuselage (6) is mounted on guide rail (8);Oil pump (12) is separately connected rotating device fuselage by pipeline (13) (6), hydraulic device (7) and console (10), console (10) are connect by pipeline (13) with rotating device fuselage (6);Work as spiral shell When rotary drill bar is installed on horizontal directional drill drive joint (5), is passed through from canopy pipe (4) is internal, carry out advanced dry pore-forming operation, when When canopy pipe (4) is installed on horizontal directional drill drive joint, canopy pipe (4) rotates jacking operation.
2. one kind according to claim 1 can the dry pore-forming pipe roof construction equipment of guide pipe inside spin, it is characterised in that: drill bit (1) it is process using steel plate and steel pipe, lozenges is provided on drill bit (1), lozenges uses the steel pipe less than pipe canopy diameter (18) and steel plate (17) processing and fabricating;Auger stem merogenesis screwed connection, inner hollow are easily installed guide instrument probe and wear Cable.
3. one kind according to claim 1 can the dry pore-forming pipe roof construction equipment of guide pipe inside spin, it is characterised in that: transmission Connector (5) can individually be connect with drilling rod (3), canopy pipe (4), to creep into and jacking construction.
4. a kind of pipe roof construction side for being conducive to settlement Control and being oriented to dry pore-forming carried out using equipment described in claim 1 Method, it is characterised in that: specific implementation step is as follows,
(1) installing pipe canopy equipment, connection electric line and oil pump pipeline carry out equipment debugging according to field condition;Basis simultaneously Pipe canopy hole location and the outer pin adjustment guide rail of pipe roof construction and orientation, prepare for drilling;
(2) suitable augers and drilling rod are selected according to pipe canopy diameter, installation guiding probe, guarantees inside drill bit shaft Probe is concentric with drilling rod;Jointed rod and driving head make the drill bit tip being installed and lozenges vertically upward or downward, Lozenges direction is determined when facilitating correction;
(3) drilling rod and guide device debugging are completed, and carry out first section rod boring construction, after pore-forming, lay down drilling rod, after transmission device It moves back, canopy pipe is inserted in drilling rod, connects canopy pipe and drive joint, carry out first section canopy pipe and rotate jacking;Head section canopy pipe requires to be shorter than head Drilling rod is saved, canopy tube top, which proceeds at first section drilling rod jointing, to be stopped;
(4) drive joint is detached from canopy pipe, connection guiding probe and guide instrument route, determines drilling deviation situation, calculates deviation side Position and angle;
(5) next section drilling rod is installed, is rectified a deviation according to when calculating deviation situation drilling;
(6) (3), (4), (5) step operation are repeated, until the construction of single pipe-s hed drilling is completed;
(7) nozzle closure is carried out after the completion of drilling, is reserved gas vent, is carried out slip casting in pipe;After gas vent returns slurry, exhaust is closed Hole continues grouting under pressure, reach design grouting pressure and grouting amount reach design 80% or more grouting amount when, terminate note Slurry;
(8) drilling machine and guide rail position are adjusted, (3), (4), (5), (6), (7) step operation is repeated, carries out other pipe roof constructions.
CN201910552786.0A 2019-06-25 2019-06-25 A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming Withdrawn CN110273687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910552786.0A CN110273687A (en) 2019-06-25 2019-06-25 A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910552786.0A CN110273687A (en) 2019-06-25 2019-06-25 A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming

Publications (1)

Publication Number Publication Date
CN110273687A true CN110273687A (en) 2019-09-24

Family

ID=67961830

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910552786.0A Withdrawn CN110273687A (en) 2019-06-25 2019-06-25 A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming

Country Status (1)

Country Link
CN (1) CN110273687A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112343509A (en) * 2020-11-26 2021-02-09 广州地铁设计研究院股份有限公司 Guiding and deviation rectifying device for pipe shed construction in sandy cobble stratum
CN113756845A (en) * 2021-09-01 2021-12-07 中煤地质集团有限公司中南分公司 Underground pedestrian passageway construction method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2298338Y (en) * 1997-08-14 1998-11-25 铁道建筑研究设计院 Drilling for construction in clayed layer large tube shed
CN105201406A (en) * 2015-09-23 2015-12-30 西安荣盛管道技术工程有限公司 High-accuracy pipeline construction technology of horizontal spiral drill
CN205154174U (en) * 2015-11-21 2016-04-13 中铁二十局集团第二工程有限公司 Weak surrounding rock tunnel pipe -shed advance support construction structures
CN205908255U (en) * 2016-08-03 2017-01-25 西安荣盛管道技术工程有限公司 High accuracy hydraulic pressure spiral level is directional bores
CN206816260U (en) * 2017-03-10 2017-12-29 中国水利水电第十三工程局有限公司 A kind of split type spiral push-bench
CN207673345U (en) * 2017-12-21 2018-07-31 北京瑞一管道科技有限公司 A kind of screw conveyor micro-push bench

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2298338Y (en) * 1997-08-14 1998-11-25 铁道建筑研究设计院 Drilling for construction in clayed layer large tube shed
CN105201406A (en) * 2015-09-23 2015-12-30 西安荣盛管道技术工程有限公司 High-accuracy pipeline construction technology of horizontal spiral drill
CN205154174U (en) * 2015-11-21 2016-04-13 中铁二十局集团第二工程有限公司 Weak surrounding rock tunnel pipe -shed advance support construction structures
CN205908255U (en) * 2016-08-03 2017-01-25 西安荣盛管道技术工程有限公司 High accuracy hydraulic pressure spiral level is directional bores
CN206816260U (en) * 2017-03-10 2017-12-29 中国水利水电第十三工程局有限公司 A kind of split type spiral push-bench
CN207673345U (en) * 2017-12-21 2018-07-31 北京瑞一管道科技有限公司 A kind of screw conveyor micro-push bench

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
乔东: "浅埋隧道下穿高速初支变形控制施工技术", 《山西建筑》 *
何占江等: "北京地铁暗挖工程工装浅析", 《市政技术》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112343509A (en) * 2020-11-26 2021-02-09 广州地铁设计研究院股份有限公司 Guiding and deviation rectifying device for pipe shed construction in sandy cobble stratum
CN113756845A (en) * 2021-09-01 2021-12-07 中煤地质集团有限公司中南分公司 Underground pedestrian passageway construction method

Similar Documents

Publication Publication Date Title
US4858705A (en) Assembly for making oriented bore-holes
US6682264B1 (en) Method of accurate trenchless installation of underground pipe
CN103590833B (en) Screw conveyor push pipe pipe curtain construction method
CN100567698C (en) Tunnel advanced support air circulated drilling construction method and drilling tool
CN204002822U (en) A kind of push pipe pipe curtain construction equipment
CN103306687A (en) Construction method for deformation control via horizontal whirling jet grouting of long cantilever in soft-rock tunnel
CN1865650A (en) Construction method for push pipe by cooperation of horizontal auger driller and horizontal directional driller
CN111946263A (en) Screw motor deflecting drilling method
CN111022059A (en) Freezing hole construction process
CN114060036B (en) Horizontal positioning grouting reinforcement construction process suitable for municipal construction of muddy soft soil stratum
BRPI0922967B1 (en) cementing jet equipment
CN112696207A (en) Construction method of overlong large pipe shed of shallow-buried bias-pressure underground excavation tunnel
CN106837411B (en) Arrangement structure and method for filling and grouting of deep-buried shield tunnel
CN110273687A (en) A kind of pipe shed construction method for being conducive to settlement Control and being oriented to dry pore-forming
CN111911712A (en) Push pipe type trenchless pipeline construction method
CN206458319U (en) Fetched earth in a kind of steel taper pile and use inclined drill
CN112815144A (en) Artificial pipe jacking construction process
CN215927267U (en) Soft rock tunnel pipe canopy is with tub drilling equipment
CN111927346B (en) River channel bottom directional drilling machine and construction method thereof
CN208651806U (en) The construction equipment that small-bore pipeline is worked continuously
CN108412518A (en) A kind of double set cylinder drill pipes and its construction method with orientation given layer slip casting function
CN210067987U (en) Raise boring machine capable of drilling directional pilot hole
CN206267141U (en) The material conveying pipe mechanism of power underneath type drilling rod
CN111749618A (en) Laser guide drilling method and system based on double-wall drill rod
CN113266283A (en) Well-guiding type shaft heading machine starting process

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20190924

WW01 Invention patent application withdrawn after publication