1.
Research and Development on the Transmission System of the Low Temperature Top Drive DQ-40LHTY-LA
DQ-40LHTY-LA低温顶部驱动钻井系统传动装置的研制
2.
Siemens Simatic S7-300 Applications in Top-Drive Drilling Equipment;
西门子SIMATIC S7-300在顶部钻井驱动装置中的应用
3.
The rails pass up to the top of the shaft, where they are taken over a pulley which can be driven in either direction by an electric motor.
导轨直通到升降井顶部。钢丝绳在顶部绕过一个滑轮。滑轮由电动机驱动可向任一方向转动。
4.
top-drive hydraulic power head
顶部驱动液压动力头
5.
great lengths of drill pipe which are rotated by an engine at the top,
钻杆顶部安装的发动机带动钻杆旋转，
6.
If explosives are used, vibrations will cause the roof of the mine to collapse .
若是用炸药，震动会使矿井的顶部倒塌。
7.
a drilling bit with cutting edges usually hard-tipped against wear.
有靠着钻身的硬顶和切边的一种钻井钻头。
8.
Study of the Top Two-drive Drilling Hydraulic System of Anchoring Drilling Machine Based on AMESim
基于AMESim的锚杆钻机顶驱双动力装置的液压系统仿真研究
9.
a hammer driven by electric motor.
用电发动机驱动的钻。
10.
drive bushing, Kelly,for well-drilling machines
凯氏传动衬套,钻井机用
11.
mobile offshore drilling unit
海上移动式钻井平台
12.
mobile offshore drilling platform
移动式近海钻井平台
13.
offshore mobile drilling units
海上移动式钻井装置
14.
bottom-supported mobile rig
坐底式活动钻井装置
15.
electrically driven rotary sidewall sampler
电动钻进式井壁取心器
16.
STUDY ON THE INFLUENCE OF ABNORMAL WELL BORE ON BOTTOM HOLE ASSEMBLY STRESS IN GAS DRILLING
非正常井眼对气体钻井下部钻具受力影响研究
17.
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
18.
mobile offshore drilling rig
移动式近海钻井平台移动式近海钻井装置