1.
Preliminary Study on Well Drilling Technique of Semi-Submersible Drilling Platform with Dual Derrick Rig
半潜式钻井平台双井架钻机作业工艺初步研究
2.
Study on Dynamic Characteristic of Double Elevating Drilling Rig Derrick and Substructure;
双升式钻机井架及其底座动态特性研究
3.
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
4.
A machine in the tower gradually cuts a narrow hole down into the ground.
井架内的钻机渐渐地往地下钻出一个小洞来。
5.
Analysis and Calculation of Static Stress of Rig Derrick by CAE Software;
应用CAE软件分析计算钻机井架静应力
6.
Development of the TZJ40(B) vertical derrick's traction-driven rig
TZJ40(B)直立井架拖挂钻机的研制
7.
Application of the high tensile material to the substructure of the super-deep well's rig derrick
高强度材料在超深井钻机井架底座中的应用
8.
"drilling rig, platform"
"钻井井架,钻井平台,见 oil (drilling) rig"
9.
Design rig's mast structure& rig's substructure.
油井的钻机的井架，珩架及底座结构件的应力分析和设计。
10.
Research of Technology Computer Simulation and Software System for Derricks in Usage;
现役钻机井架仿真技术及软件系统研究
11.
Research on Elastic and Elastic-plastic Stability of the Oil Derrik;
石油钻机井架弹性及弹塑性的稳定性分析研究
12.
Calculation of Static Stress and Stability of Model JJ225/43-K Mast;
JJ225/43-K石油钻机井架强度及稳定性计算
13.
Safety Monitoring System with Fiber Grating Based on Drilling Derrick;
基于钻机井架的光纤光栅安全监测系统
14.
Simulation model for in-service rig derrick based on finite dynamic model
基于有限元动力模型的在役钻机井架仿真模型
15.
Raise-boring machines
GB/T12761-1991天井钻机
16.
spider bow [for well drilling machines]
星形斗[钻井机用]
17.
kelly for well-drilling machiens
旋转钻孔,钻井机用
18.
mixed oil drilling rig
复合式石油钻井钻机