查询词典 drilling stem

With the electromagnetism theory and the characteristic of the well-drilling equipment,the paper brings forward the engineering technique of using drill stem as antenna in the telemeteing system of well-drilling.

此类系统大多是利用电磁波来传递信息的测试系统。发射电磁波的天线的形式和尺寸的选择，很大程度上决定了该系统的技术优势和整体成本。

This method displays the whole process of the contact between drill stem and well wall, and gives contact points and contact forces. It provides a reliable and practical aidlifetime of the drill stem. The method presented in this paper may also be adapand extended reach well drilling.

为实钻时，防止钻柱磨损和对钻柱寿命的预测提供了依据，对钻柱的结构设计以及钻柱力学的研究具有一定指导意义，本方法适用性强也可应用于定向井、大位移井等同类问题的研究。

Arrow type check valve used to be installed between drill stem and bit to prevent drilling fluid backflow from the bottom.

箭形止回阀用以安装在钻杆和钻头之间防止钻井液从井底回流。

When it is drilling, Drill stem's service life is reduced seriously, because of the flections distortion and the wear and tear with casing-pipe wall.

在钻进时，钻柱由于弯曲变形与套管壁产生磨损，严重地降低其使用寿命。

Grant prideco drilling products.co., ltd tianjin tanggu branch is wholly owned subsidiary of nov grant prideco is the world's leader in drill stem technology and drill pipe manufacturing, a global leader in drill bit technology and manufacturing, and a leading provider of high-performance engineered connections and premium tubular products.

格兰特钻具有限公司北京分公司是国民油井华高所属的一家全美资公司。格兰特公司在钻柱技术和生产以及在钻头技术和生产方面一直处于全球领先地位。同时也是全球最主要的高性能钻杆供应商之一。

John Podesta says Bush orders on stem cell research, oil and gas drilling and other matters are being re-examined.

John 说布什通过的干细胞研究，石油和煤气的开采以及其他的一些法令将会被重新审核。

Ohn Podesta says Bush orders on stem cell research, oil and gas drilling and other matters are being re-examined.

P说那些有关于肝细胞的研究、石油和天然气的开采以及其他问题将被重新审核。

Remove stem assembly and lock setting by drilling hole and inserting dowel pin.

拆卸阀杆总成，并且通过钻孔锁定设置和插入定位销。

Methods Ten mature Wistar rats were divided into normal control group (5 rats) and adenovirus (E1, E3-Deleted and carried math1 and enhanced green fluorescent protein report gene, Ad-Math1-EGFP) scala vestibuli transfer group (5 rats). Right ears of the Ad-Math1-EGFP transfering group rats were deliveried 5μl Ad-Math1-EGFP (physical tite 2.1×10^11v.p./ml) into cochleas through the way of drilling scala vestibuli of cochlear basal turn. As a control, the normal group received nothing to inner ear. In order to estimate functional condition of vestibule and cochlea, the click-evoked potentials on the surface of the cervical dura mater, auditory brain stem response and swimming time were recorded in all rats at 7 days after treatment, and then histologic and morphologic observation were carried out after animals were sacrificed. Results All animals' morphologic observation showed that inner ear hair cells were normal after transfer.

将10只成年Wistar大鼠分为正常对照组和缺失E1、E3基因片段且构建有Math1基因和绿色荧光蛋白报告基因的复制缺陷型腺病毒(adenovirus-Math1-enhanced green fluorescence protein， Ad-Math1-EGFP)前庭阶导入组，每组5只，实验组大鼠在右耳通过耳蜗底回前庭阶打孔的方法导入物理滴度为2.1×10^11v.p/ml的上述腺病毒5μl，对照组大鼠不做任何处理。7天后对动物进行颈髓硬膜外短声诱发电位(click-evoked potentials on the surface of the cervical dura mater， CDM-CEP)、听性脑干反应阈值检测和游泳试验，评价前庭和耳蜗功能，然后将动物处死进行组织形态学观察。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。