The system is constructed by drilling method and the air intake and the gas outlet are connected by a directional drilling hole.
介绍了对吉林省双阳煤矿边缘部分所遗留的煤层所设计的煤炭地下气化炉 ,该气化炉采用定向钻孔贯通 ,钻孔法建炉 ,通过计算可获得较大的经济和社会效
As a trenchless construction method, directional drilling and PE pipe dragging is uniquely advantageous, with less impact on nearby buildings and traffic, lower cost for maintenance, better protection of the ground services, etc.
定向钻孔拖拉高密度聚乙烯平壁管(HDPE管)作为一种非开挖施工方式,具有对周围构筑物、交通的影响小,维修费用少,对管线的保护作用大等独特的优越性。
Spiral and round curve methods of General Geological Coordinate System have established the basis on which the design of curved or directional drilling can be well calculated .
通用地质坐标系的似螺线法和圆弧线法为设计弯曲和定向钻孔提供了全定量计算的基础,并能在钻孔施工发生偏离时,指导选择钻孔纠斜方案。
The method of cement slurry injection through big-shift directional drilling and its technological parameters used in Gaoyang Iron Ore Mine to seal underground water rushing are introduced.
详细介绍了高阳铁矿实施大位移定向钻孔注浆方法和工艺参数,其成功的经验对治理矿山井下突水淹井事故具有一定的参考价值。
The construction craft research of directional note thick liquid water shutoff drill hole in the depletion region
过煤矿采空区定向钻孔施工工艺研究
The Researching of Slurry s Effect in the HDD (Horizontal Directory Drilling);
非开挖水平定向钻孔中的泥浆作用机理研究
Practice of directional hole boring for laying electric power supply lines
非开挖定向钻孔敷设电力电缆的施工实践
The Application of Directional Drilling and Towing High-Density Polyethylene(HDPE) Pipe in Municipal Pipeline Engineering;
定向钻孔牵引高密度聚乙烯管材在市政管道工程中的应用
Study on axial vibration drilling to improve positioning accuracy
轴向振动钻削提高钻孔定位精度研究
Application of Bit Water Way in HDD
水平定向钻进扩孔钻头水口应用分析
Application of Wireless-while-drilling Technology on Large Diameter Directional Hole
无线随钻技术在大口径定向工程钻孔中的应用
Application of Directional Drilling Technology in the Hole WFSD-1 of Wenchuan Earthquake Fault Scientific Drilling Project
汶川地震断裂带科学钻探一号孔(WFSD-1)定向钻进技术的应用
Of course, one should be scrupulous when drilling through the surface of a mural.
当然，透过画面向岩石钻孔一定要慎之又慎。
Study of Non-Dig Oscillate-Drilling DTH Orientation Device Applied on Hard Rock Stratum;
硬岩非开挖钻进摆动式潜孔锤定向机构的研究
The practice and application of kilometer-orientated large diameter and long-distance drilling
千米定向大直径长距离钻孔的实践与应用
Mechanism Research of Gas Drainage by Drilling Long Holes
井下预抽瓦斯定向长钻孔的合理性参数研究
The Optimal Design About the Trajectory of Non dig Guided Boring
非开挖导向钻进钻孔轨迹的优化设计
When it has been decided where we are going to drill,
当确定钻孔地点后，
A twist drill is designed to drill a hole which has a particular size.
麻花钻用来钻削具有一定尺寸的孔。
Construction Technology of Directional Branch Hole in Complex Easily Inclined Stratigraphic
若尔盖铀矿区复杂易斜地层定向分支钻孔施工技术
Application of Controlled Directional Group Borehole Drilling Technology to Grouting in Xuandong Ventilation Shaft
受控定向群孔钻进技术在宣东风井注浆中的应用
Study on Trajectory Measurement Technology of the Point-the-Bit Rotary Steerable Drilling System
指向式旋转导向钻具钻孔轨迹测量研究