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geological PDC coring bit 地质PDC取心钻头
The bottom hole flow physical model of a kind of PDC coring bits is established considering the effect of junk slot and teeth layout in this paper. 以一种现场常用的PDC取心钻头为原型,充分考虑排屑槽和切削齿对于井底流动的影响,建立了与实际相接近的PDC取心钻头井底流场的物理模型。
The geologist needs to know what rocks the drill has reached, so every so often a sample is obtained with a coring bit. 地质学家需要知道钻头已以到达什么样的岩层,因此时常要用芯钻头取样。
Geologist so every so often The geologist needs to know what rocks the drill has reached, so every so often a sample is obtained with a coring bit. 地质学家需要知道钻头已经到达什么样的岩层,因此时常要用取芯钻头取样。
Among vacuum brazed diamond tools, diamond bead, diamond core bit and diamond saw blade are patent products in China. 其中钎焊金刚石工具中钎焊串珠、钎焊钻头和钎焊锯片是国家专利产品。
We can design and sidetrack cut bevel bit,core bit and eccentric bit.We can design and produce apace at the same time according the user's needs. 研究设计各种新型金刚石全面钻进钻头和金刚石取心钻头。
DEVELOPMENT AND TESTS OF LOW-TEMPERATURE ELECTROPLATED81/2" PDC CORING OIL BITS 低温电铸8(1/2)″复合片取芯油井钻头的研制与试验
Run in a diamond core bit. 下金刚石取芯钻头。
What type of core bit is it? 这是什么型号的取芯钻头?
Raising the stability of outer core barrel is the main approach to extend the life of core bit and to raise core recovery and the footage of single core barrel. The outer core barrel with centralizer is an effective method to raise its stability. 提高外筒稳定性是延长取心钻头寿命、提高岩心收获率及单简进尺的最主要途径,而外筒加扶正器是提高其稳定性的有效方法。
The Application of Epoxy Adhesive to Coring Bit 环氧胶粘剂在取芯钻头上的应用
This is jet bit and that is a PDC bit. 这是喷射式钻头，那是人造聚晶金钢石钻头。
The hard core in the party make all the decisions. 这个党的核心成员决定一切。
Laboratory study of core bit whirling 取心钻头涡动的室内实验研究
A New Kind of Stub Apply to the Core Bit 一种新型齿柱在密闭PDC取心钻头上的应用
This concept is at the very core of her theory. 这个概念是她理论的核心。
PDC bit uses polycrystalline diamond compacts (PDC) as cutters. pdc钻头用聚晶金刚石（复合片）作为刀具。
He was a military man to the core. 他是个地地道道的军人。
Let's get to the core of the argument. 咱们进入实质性的辩论吧。
The core of our appeal is freedom of speech. 我们的要求的核心是言论自由。