drilling head 钻头 ; 钻削动力头 ; [机] 钻削头 ; 排钻样式
multi spindle drilling head 多轴钻头
Drilling head number 钻排总数
Drilling head feeding speed 钻头进给速度
articulated drilling head 活节钻头
Installation pitch of drilling head 钻接头装配孔径
special drilling head 专用钻削头
cone twist rock-drilling head 锥螺旋凿岩钻头
Since August 21 when there was an accident at the Montara offshore drilling rig's well head, around 403, 000 litres of oil have been pumped into the Timor Sea.
自8月21日蒙达拉海上钻井平台的井口发生事故以来，约403,000公升石油被注入帝汶海。
Engineers had spent days pumping heavy drilling fluid into the leaking well head on the ocean floor in a high-pressure bid to smother the gushing crude and ultimately seal the well with cement.
工程师们数日来一直向海底的泄漏油井泵入大量的钻探泥浆，希望用高压堵住喷涌的原油，最后用水泥封死油井。
In the process of drilling, the rotating control head is often damaged by the lateral force of the kelly, and this may lead to serious accident.
在钻井过程中，方钻杆的侧向力作用常常导致旋转控制头损坏，造成事故。
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