1.
The generously designed drill rod clamping device can be opened up fully to enable the installation of drilling tools and drill casings exceeding 171/2" (444 mm) in diameter.
如图所示的钻杆夹持装置可安装最大直径为444毫米的钻具和套管.
2.
The extensive range of optional equipment includes hydraulically operated drill rod clamps, rotary casing drives and casing oscillators.
更大的直径可选装钻杆夹持器,套管驱动器和摇管器.
3.
part of a drill that grips the bit
夹头（钻或钻床上用以夹住钻头的部分）.
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.
Key type drill chuck
GB/T6087-1993扳手钻夹头
6.
quick change drilling chuck in process
不停车快换钻攻夹具
7.
drill and turning tool holder
钻孔与车削两用刀夹
8.
drill chuck with thread adapter
螺纹联接扳手钻夹头
9.
Work-holding devices are called jigs and fixtures.
工件夹持装置叫做钻模或夹具。
10.
hard banding of tool joint
钻杆接头表面加硬圈
11.
Ingersoll-Rand jumbo column
英格索尔－兰德钻车托杆
12.
stacking capacity of derrick
井架的钻杆立根容量
13.
plain clinometer
钻杆下部装的测斜仪
14.
hard facing of tool joint
钻杆接头表面加硬层
15.
engine ,drill, dental, with swivel arm
牙科钻机,带旋转杆
16.
shoulder dressing tool
钻杆接头端面整形工具
17.
Defects Analysis on 37CrMnMo4 Drill Pipe Joints
37CrMnMo4钻杆接头缺陷分析
18.
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£