1.
Brief Study on the Rock Fragmentation Test Bed of Air Rotary Percussion Drilling
空气冲旋钻井破岩试验台架研制初探
2.
kelly for well-drilling machiens
旋转钻孔,钻井机用
3.
auger with valve
(钻浅井用) 带阀螺旋钻具
4.
a bit or drill having deep helical grooves.
有深螺旋状凹槽的一种钻头或钻井。
5.
rotary wash-boring equipment
旋转式水冲钻孔设备
6.
A Study of the Technique of Cable Drilling in Modern Time;
浅述近代冲击(顿钻)钻井工艺技术
7.
Study on the storage function of the measurement while drilling (MWD) system in rotary steerable drilling tool
旋转导向钻井工具随钻测量系统存储功能研究
8.
Mechanics Model of Rotation Axis in Directive Rotary Steerable Drilling System
指向式旋转导向钻井系统旋转轴力学模型
9.
Improvement of penetration rate with hydraulic pulsating-cavitation jet compound drilling technology
利用水力脉冲空化射流复合钻井技术提高钻速
10.
Research on and Design of the Driven Section of the Long-Stroke Modular Drilling Pump;
长冲程模块钻井泵动力端研究与设计
11.
ABRASION OF EXHAUST PIPE BY THE HIGH-SPEED GAS WITH THE CUTTING IN AIR DRILLING
空气钻井中颗粒对排气管的冲蚀分析
12.
Analysis Of Influence Factors On Transmissio Speed of Anti-well Drilling Mud Pulse
反井钻井泥浆脉冲信号传输速度影响因素分析
13.
Deep Alluvium Mine Shaft Drilling Construction Method
深厚冲积层煤矿井筒钻井法施工的探讨
14.
Experiment Study on Ultra-Deep Well Hydraulic Pulsating-Cavitating Water Jet Drilling
超深井水力脉冲空化射流钻井试验研究
15.
To bore(a shaft) with a trepan.
钻用钻井机钻（矿井）
16.
Design of testing system of oriented experimental rotary table for petroleum drilling
石油钻井旋转导向实验转台测试系统设计
17.
Method for eliminating centrifugal acceleration in rotary steerable drilling system.
旋转导向钻井系统中离心加速度消除方法研究
18.
FEM for a type drilling-perforating casing with screw holding in open hole completion
裸眼完井螺旋钻孔-射孔套管的有限元分析