1.
Cause Analyses of Pin Joint Fracture of 139.7 mm Heavy Weight Drill Pipe
139.7mm加重钻杆外螺纹接头断裂原因分析
2.
The bit was attached to a heavy length of steel suspended by a wire rope.
钻头系在由钢丝绳悬挂起来的加重杆上。
3.
hard banding of tool joint
钻杆接头表面加硬圈
4.
hard facing of tool joint
钻杆接头表面加硬层
5.
Stability and Bifurcation of the Drilling Shaft System in Processing Deep Hole Based on Boring and Trepanning Association
BTA深孔加工钻杆系统的稳定性及分岔
6.
Its main functions are maintaining borehole gage,improving drill string stability and protecting lower drill string from excessive wear.
其重要作用是保持钻头尺寸符合标准，提高钻杆稳定性，避免钻杆下部过于磨损。
7.
Research of the Servo Control Method for the Thickening Part of Drill
钻杆加厚段检测系统伺服控制方法的研究
8.
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，
9.
a round-headed bolt for timber; threaded along part of the shank; inserted into holes already drilled.
加工木料用的圆头螺栓；部分连杆有螺纹；可以插入事先钻出的孔中。
10.
Current Situation of Research on Failure Analysis and FE Analysis of Drill Pipe Upset Transition Area
石油钻杆加厚过渡区失效分析及有限元分析的研究现状
11.
Stability and Nonlinear Response of Drilling Shaft System in Deep Slot Hole Drilling
槽孔加工中钻杆系统的非线性运动与动力稳定性
12.
Stress Analysis of Sucker Rod and Application of Heavy-weight Rod in Directional Well
定向井抽油杆柱应力分析及加重杆的应用
13.
Study on the New Technology of Using Twin-Screw Extruder to Produce Textured Fish;
双螺杆挤压重组鱼肉加工新技术研究
14.
Several Thoughts about Reclaiming Heaver Loader in the Drilling Fluid of High Density
高密度钻井液加重剂再利用的几点思考
15.
OPTIMAL DESIGN ON CENTRIFUGAL SEPARATED AND RECYCLED PARAMETER OF DRILLING FLUID WEIGHTING-MATERIAL
钻井液加重剂离心分离和回收参数优化设计
16.
Ingersoll-Rand jumbo column
英格索尔－兰德钻车托杆
17.
stacking capacity of derrick
井架的钻杆立根容量
18.
plain clinometer
钻杆下部装的测斜仪