1.
Research of Screw Drill CAD/CAPP System Based on PDM;
基于PDM的螺杆钻具CAD/CAPP系统研究
2.
Research on the Modularize Design of Downhole Motors Based on Solidworks;
基于Solidworks的螺杆钻具模块化设计研究
3.
Analysis on balling up caused by helicoid hydraulic motor bypass valve failure in combined drilling technology
复合钻井过程中螺杆钻具旁通阀刺漏造成钻头泥包分析
4.
Design of CAT System for Screw Drilling Tools and Screw Drilling Motors
螺杆钻具、螺杆泵性能计算机辅助测试系统的设计
5.
Design of the Data Acquisition and Management System on the Downhole-motors Testing Table;
螺杆钻具实验台数据采集管理系统设计
6.
The Hole Deviation Control Theory Analyses and Application on Positive Displacement Motor;
螺杆钻具控制井斜的理论分析与应用研究
7.
Structural Analysis and Optimum Design of Downhole Motor Based on CAE;
基于CAE的螺杆钻具结构分析及优化设计
8.
Analysis of Mechanics Performance and Life Prediction for Lobe Type Couplings of PDM
螺杆钻具万向轴力学特性分析及寿命预测
9.
Research and Application of the Techinic of Bridge Floor Treatment by Helicoid Hydraulic Motor
螺杆钻具处理塞面工艺技术研究及应用
10.
Structural analysis and improved design for transmission shaft of screw-drilling device
螺杆钻具传动轴的结构分析与改进设计
11.
Strength Analysis of Pressure and Torsion Combination Loads of Flapper Teeth of LTC
螺杆钻具瓣形万向轴瓣齿压扭组合强度分析
12.
The Design and Research of the Three Stations Vertical Injection Equipment for Rubber Stator of Screw Drill and Screw Pump and Simulation of 3D Dynamic Process;
螺杆钻具和螺杆泵橡胶定子的三工位立式注射成型设备的设计研究与三维动态模拟
13.
Analysis on Mechanical Properties of Positive Displacement Motor Assembly and Its Applicationin Coal Mine Engineering Hole;
煤矿工程孔中螺杆钻具组合力学特性分析及应用
14.
ANALYZING SELF-LOCKING PHENOMENON OF PDM(POSITIVE DISPLALEMENT MOTOR) WITH BENT SUB IN SAIPING 1 WELL
塞平—1井所用单弯螺杆动力钻具自锁现象分析
15.
auger with valve
(钻浅井用) 带阀螺旋钻具
16.
A large tool for boring into the earth.
土螺钻，地螺钻一种用来钻土地的大型工具
17.
shoulder dressing tool
钻杆接头端面整形工具
18.
Secondly there is error between thethread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。