rotary drill for shaft sinking

用法例句

Improved design of the drilling system for the large-scale shaft-well drill

大型竖井钻机钻具系统的改进设计

Present developmentsituationoflargeverticalshaftdrillshome and abroad and the drill development proposals in China ( Ⅰ )

大直径竖井钻机发展现状与我国钻机发展建议(一)

To bore(a shaft) with a trepan.

钻用钻井机钻（矿井）

Study on Vertical Structural Stability of a Super-deep Drilled Shaft in Slurry

泥浆中超深钻井井壁竖向稳定性分析

Raise-boring machines

GB/T12761-1991天井钻机

spider bow [for well drilling machines]

星形斗[钻井机用]

kelly for well-drilling machiens

旋转钻孔,钻井机用

mixed oil drilling rig

复合式石油钻井钻机

SHALLOW HORIZONTAL DRILLING TECHNOLOGY BY USING VERTICAL-WELL RIG IN HENAN OILFIELD

河南油田直井钻机钻浅层水平井钻井技术

A tall framework over a drilled hole, especially an oil well, used to support boring equipment or hoist and lower lengths of pipe.

钻架竖在钻井（尤指油井）之上的支架，用来支撑钻孔设备或提升和下放钻管

When it has been decided where we are going to drill, we put up at the surface an oil derrick.

决定了钻孔位置后，我们就在地面上竖起井架。

ERW Drilling and Completion Technology in Ultra-Shallow Heavy Oil Reservoir with Conventional Vertical Rig

直井钻机钻超浅层稠油大位移水平井钻井完井技术

APPLICATION OF ORGANIC SALT DRILLING FLUID IN THE THIRD SECTION OF WELL T4031

有机盐钻井液在T4031井三开井段的应用

Brief Talking about Grouting and Drilling Construction Process of Sealing Vertical Crack Sub-sealing at Vertical Shaft Face;

浅谈立井井筒工作面竖向裂隙封底打钻注浆施工工艺

drive bushing, Kelly,for well-drilling machines

凯氏传动衬套,钻井机用

tool joint for well-drilling machines

工具接头,钻井机用

computerized well planning program

计算机钻井设计程序

The shaft of a mine.

竖坑矿的矿井或竖井

drilling-in unit

洗井和钻油层用的小钻机