jar bumper

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.

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.

part of a drill that grips the bit

夹头（钻或钻床上用以夹住钻头的部分）.

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，

Key type drill chuck

GB/T6087-1993扳手钻夹头

quick change drilling chuck in process

不停车快换钻攻夹具

drill and turning tool holder

钻孔与车削两用刀夹

drill chuck with thread adapter

螺纹联接扳手钻夹头

Work-holding devices are called jigs and fixtures.

工件夹持装置叫做钻模或夹具。

hard banding of tool joint

钻杆接头表面加硬圈

Ingersoll-Rand jumbo column

英格索尔－兰德钻车托杆

stacking capacity of derrick

井架的钻杆立根容量

plain clinometer

钻杆下部装的测斜仪

hard facing of tool joint

钻杆接头表面加硬层

engine ,drill, dental, with swivel arm

牙科钻机,带旋转杆

shoulder dressing tool

钻杆接头端面整形工具

Defects Analysis on 37CrMnMo4 Drill Pipe Joints

37CrMnMo4钻杆接头缺陷分析

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£