This paper introduced a new type DTH hammer drilling with eccentric simultaneous casing about the structure composition and the design idea.
介绍了新型偏心跟管钻具的结构组成以及设计思路。
Correlation study on drilling weight on bit (WOB) fluctuation rules of pendulum assembly and unbalanced assembly was carried out by using simulation device for bottom hole assembly (BHA).
利用底部钻柱动力学研究试验装置对钟摆钻具与偏轴钻具的钻压波动规律进行了对比研究。
During the operation several downhole complications took place, such as collar break, cone break off, drill pipe sticking, lost circulation, caving and eccentrically worn drill pipe.
该井在施工中发生了断钻铤、掉牙轮、卡钻事故和井漏、井壁失稳、钻具偏磨等复杂情况。
Design and Analysis on Finite Element of New Type DTH Hammer Drilling with Eccentric Simultaneous Casing
新型偏心跟管钻具的设计与有限元分析
Theoretical Analysis and Experimental Research of Flow Field by DTH Hammer Drilling with Simultaneous Casing Tool of JSL-30 Drill Rig;
基于JSL-30型砾石钻机潜孔锤同心跟管钻具的流场理论分析及试验研究
The calculation results demonstrate the effective eccentricity and the lifting force of the upper drill string are the major influential factors.
计算结果表明，有效偏心距和上部钻柱的提升力是影响近井口套管偏磨的主要因素。
combined pipe tap and drill
管用钻孔攻丝复合刀具
tools to tubing substitute
钻具连接油管的接头
Diamond core drilling equipment conventional system
GB/T16950-1997金刚石岩心钻探钻具设备
Diamond core drilling equipment--Wire line system
GB/T16951-1997金刚石绳索取心钻探钻具设备
Make Use Guide Drill Case Drill a Hole Lead to of Deviate Heart of a Drill
使用导向钻套钻孔引出的中心偏移问题
Calculation of Eccentric Wellbore Pressure Drop and Air Volume Requirements in Air Drilling
空气钻井偏心井筒压力及注气量计算
Pull out (or run in ) the string up to the shoe and hang it on the 5 inches pipe ram] .
起钻（或下钻）至套管鞋处，并把钻具悬挂在5”闸板防喷器上。
Analysis and Optimization on Invalid Casing in Casing Drilling in Luanchuan Molybdenum Mine
栾川钼矿跟管钻进套管失效分析及优化设计
A shaft on which a working tool is mounted, as in a dental drill.
心轴用于安装工具的蕊棒，如牙钻蕊棒
Development of core drill equipment for combined underwater drill rammer of rock built-in pile hole
嵌岩桩孔组合潜孔锤取心钻具的研制
Mechanical Analysis and Design of Coring BHA in Long Horizontal Segment
水平段大段取心钻具力学分析与设计
work the pipe free
活动钻具或管柱使之解卡
combined taper pipe tap and core drill
扩孔钻和锥管丝锥复合刀具
Research on the Technology Issue of Down-the-hole Hammer Drilling with Casing for Complex Stratum
复杂地层潜孔锤跟管钻进工艺问题研究
adjustable jaws center workpiece in a lathe or center tool in a drill.
在车床或钻孔机中心工具内的可调整中心工件。