Experimental research on drilling and cutting characteristics of PDC bit at home and abroad
国内外PDC钻凿特性检测试验研究
Using this method,the fractal dimension of well logs in Daqing Xujiawei had been calculated,and the relationship between fractal dimension and anti-drilling properties had been confirmed by regressive analysis.
在室内实验的基础上,通过回归分析确定了测井资料分维数与相关岩心抗钻特性间的相关关系。
Experimental research on drilling and cutting characteristics of PDC bit at home and abroad
国内外PDC钻凿特性检测试验研究
a small bit that drills a first hole to guide a larger drill.
钻凿初洞来导引大钻头的一种小钻头。
To make a hole in or through, with or as if with a drill.
钻，凿，开洞用或似用钻打洞或钻孔
bar rigged drifter
架式风钻，架式凿岩机
drill ,interchangeable, of base metal, for rock drilling or earth boring
凿岩或钻土用钻头,贱金属制,可互换式
Study on Dynamic Characteristics and Failure Mechanism of Drill String in Air Drilling
气体钻井钻柱动力学特性及钻柱失效机理研究
ANALYSING DYNAMIC CHARACTERISTICS OF DRILLING STRING EDDY OF INSIDE CONTAINING DRILL FLUID
内含钻井液的钻柱涡动动力特性分析
BHA directional behavior
底部钻具组合定向特性
Specification for operation of hydrographic geological drilling and digging for water-supply
供水水文地质钻探与凿井操作规程
Pionjar 120 motor drill and breaker
必安凿120钻孔机及轧碎机
multiple boring machine [for working metal]
钻探或开凿机械[自动推进的]
Under-drilling is calculated on the maximum theoretical burden.
底部钻凿是按最大理论抵抗线计算。
a bit for enlarging the upper part of a hole.
用来扩大凿孔上部的一种钻头。
They' re drilling a new tunnel under the Thames.
在泰晤士河河床下钻凿一条新隧道.
Phacoemulsification with phaco-drill in scleral limbal corneal tunnel incision (SLiC Incision).
角膜缘隧道切口钻凿劈核超声乳化术
Study on drilling quality of samba 261 drill for VCR stope in Tonglvshan
铜绿山VCR法采场Simba261钻机凿岩质量研究
Drill jig size calculation of the double inclined holes in the handle of YT 24 rock drill
YT24型凿岩机柄体双斜孔钻模尺寸计算
Kinematical analysis and modeling of drilling manipulator in rock drilling machine
凿岩钻车机械臂的运动学分析与建模