Main parts such as crownblock, mast, substructure, rotary table and travelling system of drilling rig meet API standard.

钻机天车、井架、底座、转盘及游动系统等主要配套件符合API规范。

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The expressions of energy transformation for disc brake system of drilling rigs are derived on the basis of the principle of energy conservation.

根据能量守恒原理又推导了钻机盘式刹车系统的能量转换表达式。

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In this paper, a monitoring system of drilling process by using a McS-51 single chip computer is described, and the working principle, hardware and software are given.

本文介绍了一种用MCS—51单片机实现的钻削过程故障监测系统，给出了系统的工作原理、硬件结构及软件设计思想。

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What tripped up Ezekowitz's system was Harvard drilling eight of 18 three-point attempts.

WSJ: NCAA Tournament: Harvard Outsmarts Harvard

Shell Oil Vice President Paul Goodfellow said this is the first time the company and environmental groups have reached agreement to create an entire system for reducing the effects of shale drilling.

WSJ: Both sides agree on tough new fracking standards

What this all means is that there is an incredible amount of excess drilling capacity in the system, waiting to come on line should the natural gas price firm up for any prolonged period of time.

FORBES: The Texas Shale Oil & Gas Revolution - Leading the Way to Enhanced Energy Security