1.
According to the drillpipe structural characteristics, a dolly appropriate for drillpipe and Kelly detection is designed, of which its probe is adjustable.
根据钻杆的结构特点,设计了探头距离可调的适用于圆钻杆和方钻杆的探测小车。
2.
Design and Research on Hydraulic Non-Circular Gear Roof Bolt Driller;
非圆齿轮式液压锚杆钻机的设计研究
3.
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。
4.
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，
5.
As a typical example, the contact-impact problem between the drillstring and the bore hole wall in oil field has been calculated and analysed.
文中针对石油工程中钻柱这类典型的细长杆与圆形井壁的接触碰撞问题进行了求解。
6.
circular tooth and cylindrical worm reducer
圆弧齿圆柱蜗杆减速机
7.
the round part of the bit by which it is held in the drill.
钻头上的控制钻孔机的圆形部分。
8.
hard banding of tool joint
钻杆接头表面加硬圈
9.
Ingersoll-Rand jumbo column
英格索尔－兰德钻车托杆
10.
stacking capacity of derrick
井架的钻杆立根容量
11.
plain clinometer
钻杆下部装的测斜仪
12.
hard facing of tool joint
钻杆接头表面加硬层
13.
engine ,drill, dental, with swivel arm
牙科钻机,带旋转杆
14.
shoulder dressing tool
钻杆接头端面整形工具
15.
Defects Analysis on 37CrMnMo4 Drill Pipe Joints
37CrMnMo4钻杆接头缺陷分析
16.
5.11 The drill collar O.D. is 7.5 inch, and the drill pipe O.D. is 5 inch.
钻铤外径为7.5” ，钻杆外径为5敗£
17.
Simulation Research on Drill Pipe of 2000 Meter Water Well Rig;
2000m水井钻机的钻杆仿真研究
18.
Experimental Model and Simulation Analysis on Drill Pipe of the Reconnaissance Drilling;
勘查钻进钻杆的实验模型与仿真分析