钻杆

• Rules for the inspection of welding drill pipes for import and export
  进出口石油对焊钻杆检验规程
• Field inspectiong of new casing , tubing , and plani end drill pipe
  新管套油管和平端钻杆现场检验方法
• Get the special hang off tool ready
  准备挂钻具的特殊短钻杆。
• Rock drilling ; flush drills ; drill rod profiles , shanks and tapers
  凿岩.冲击钻.钻杆截面.钻柄和锥度
• Inch boring bars for indexable inserts - designation and dimensions
  带有转位刀片的英制钻杆.标示和尺寸
• The oxygen corrosion behavior of s 135 drill pipe steel in drill fluid
  135钻杆钢在钻井液中的氧腐蚀行为
• Development of a drillpipe non - destructive test device with magnetic memory
  钻杆磁记忆无损检测装置研究
• Drive shaft is close to buggering ,
  钻杆什么用都没有,
• Setback bottom hole assembly
  将下部钻具立于钻杆盒内
• Development of heat treatment automatic control system for welded drill pipe
  对焊钻杆热处理自动控制系统研制