GCF-20A reverse circulation percussive rotary drill rig is a multi function drill rig with percussive drilling as the main means and rotary drilling as supplemented.
GCF - 2 0A型冲击 -回转反循环工程钻机是以冲击钻进为主、回转钻进为辅的多功能钻机 ,可适应软、硬岩石等不同地层钻进的要求。
The description is made of the introduction and analysis of the popular drilling hole technique that used in large boulder formation, including normal drilling technique such as digging, percussion drilling, rotary drilling, large diameter DTH drilling, explosion drilling technique and combined drilling technique.
介绍了目前在含巨大孤石地层中的成孔方法 ,包括一般方法如开挖法、冲击钻进、回转钻进、大直径潜孔锤钻进、爆破法、复合钻进工艺。
The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No.
介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
A Technical Investigation on Drilling in Australia and the Technical Service of Wire-line Coring Percussive-rotary Drilling
澳大利亚钻探技术考察与绳索取心冲击回转钻进技术服务
Model Analysis on Electro-hydraulic Proportional Control for Rotary Drilling System of Engineering Geological Drilling Rig
工程地质钻机回转钻进比例控制系统的模拟分析
Structural Design and Mechanism Study on Water-saving Rotary Percussive Devices;
节水型回转冲击钻具结构设计与钻进机理研究
easing the bit in
钻头轻压慢转钻进地层
Design and Improvement of Back Reamer in Directional Drilling Non-excavation Pipe Laying Construction
导向钻进非开挖铺管施工扩回钻头的设计改进
Research on Load Self-adapting of Rotating System in Measuring Drill
随钻测量钻机回转系统负载自适应研究
Study on DTH with Self-propelled Round Bit and Its Simulation Analysis;
钻头自回转型潜孔锤研究及仿真分析
Modeling and Simulation of Rotating Hydraulic System in Down-the-Hole Drill
潜孔钻机回转液压系统的建模与仿真
Drilling is performed with a rotating tool called a drill.
钻孔是用一个称为“钻头”的旋转刀具进行的。
Application of Percussion Drill and Rotary Drill in the Construction of Dock Rock-socketed Oblique Piles
冲击钻机与回转钻机在码头嵌岩斜桩施工中的应用
drilling machine, rotary, self-propelled, for oil or gas
旋转式钻机,自动推进式,油田或气田用
The Development of CHF-20 Percussive-Rotary Reverse-circulation Drill;
CHF-20型冲击—回转反循环工程钻机的研制
Researches on Rotary Machine of Drilling and Grinding Carbon Fiber Reinforce Composite Component;
回转类碳纤维复合材料构件钻磨机床的研究
The Pore-forming Mechanism Study of Cam Bit on Percussive-Rotary Extruding DTH Drilling
凸轮型冲击回转挤压钻头成孔机理的研究
Application of the Positive Cycle Mechanical Rotary Boring Grout Pile on the Pile Construction of the Pebble Bed
正循环机械回转钻孔灌注桩在卵石层中的应用
Contact Analysis of Gear Transmission in Rotating Reducer of Blasthole Drills based on ANSYS
基于ANSYS的牙轮钻机回转机构齿轮接触分析
As the diamond tip of the drill revolves, it is lubricated by mud.
在钻机的金刚钻头旋转的时候，泥浆便进行了润滑。
He came back to the tent very late and crept in as silently as he could.
他很晚回到帐篷，尽可能不出声地钻了进来。