It is practically proved that frequency distribution of drill-core recovery is partial.
实践证明，岩心钻探取心率的频率分布是偏态的。
The riser's inner hollow core (a pipe within a pipe) is reserved for the drill string.
立管内部核心是空心的(管中管)，留给钻柱使用。
A drill assembly is typically a few tens of metres long and can only hold a core of ice of the same length.
一个钻取机通常有数十米长而且只能获取一个与之等长的冰芯。
Core sampling drill for deep seabed shallow strata is necessary equipment in exploration of deep seabed mineral resources and survey of deep seabed geology etc.
深海浅地层岩芯取样钻机是进行深海底矿产资源勘探、深海底地质调查等不可缺少的重大技术装备。
The invention comprises a handle and a drill bit, wherein the drilling bit has a trocar structure consisting of two parts, namely a sleeve and a tube core needle.
本发明包括手柄和钻头，钻头为套管针结构，包括套管和管芯针两部分组成。
My company can produce all kinds of odd and even series of core drill pipe and rope.
我公司可以生产各种规格系列的单双管及绳索取芯钻具。
In the paper, a new working layer structure of diamond core drill for solving the problem is introduced which can increase the efficiency and the working life of the drilling tool.
文章介绍了金刚石钻孔工具一种新的工作层结构，该结构可以有效解决钻孔工具排粉散热难问题，提高钻孔工具的工作效率，延长钻孔工具的使用寿命。
It can also be seen in Fig. 12.2 that a core drill has flat end.
在图12.2中同样能看到，空心钻具有平坦的端部。
The lightest core sampling drill in the world !
世界最轻便的浅层取样岩心钻机 ！
Introduction is made on the development, technical parameters, main features, version verification test, production trial and appraisal of CD - 3 core drill.
介绍了CD-3型岩心钻机研制情况、技术参数、主要特点及型式检验、生产试验和鉴定情况。
As the core technology of smart drilling, intelligent drill pipe has long been a technical problem which can not be solved by domestic research staff.
智能钻杆作为智能钻井的核心技术，一直是国内研究人员久攻不下的技术难题。
It is suggested that the collection of following information on drill core record compiling, core orientation, mine opening geological record compiling, etc., should be strengthened from now...
建议今后从地表填图、钻孔岩心编录、岩心定向、坑道编录等方面加强工程地质资料的收集。
A drill bit used for obtaining core samples in concrete or rock formations.
钻头被用来在水泥或岩层获取岩芯样品。
Vice hoist for the replacement of the drill pipe or other tools and put sand core tube can also be used for flushing operations.
钻机配有一个主卷扬机、一个副卷扬机。主卷扬机用于升降钻具、下井管等。副卷扬机用于更换钻杆或其他取芯工具及提砂筒，也可用于洗井作业。
Based on the prospecting practices of many years, the paper has summarized 8 general lithologic features of core under normal stratigraphic sequence before drilling to the coal-beds in drill hole.
根据多年的勘查实践，总结提出了八条正常地层层序下钻孔见煤前的一般岩心岩性特征，对指导见煤预告等大有裨益。
A laser holographic method of measuring the surface Rayleigh-wave rate of the core taken from the oil-drill of Daqing is given. The measured results were analyzed and discussed.
提出油田井下岩芯表面瑞利波的激光全息测试方法，给出了测量结果并进行了分析和讨论。
Shanghai Jeichu Machinery &Electric Co. , Ltd. is manufacturer specialized in research, production and sales of Diamond Core Drill, Will Saw and Diamond Series Tools.
上海杰出机电有限公司是集研发，生产，销售于一体的金刚石钻孔机、墙锯机以及金刚石系列工具的专业制造商。
Shanghai Jeichu Machinery &Electric Co. , Ltd. is manufacturer specialized in research, production and sales of Diamond Core Drill, Will Saw and Diamond Series Tools.
上海杰出机电有限公司是集研发，生产，销售于一体的金刚石钻孔机、墙锯机以及金刚石系列工具的专业制造商。
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