1)drilling cost,钻井费用2)Insurance to Cover the Charges of Redrilling,重新钻井费用保险3)bit cost,钻头费用4)DWO,用油钻井5)exploration well cost,探井费用6)rotary bit,旋转钻井用钻头
用法例句
The differences existed between verlicle wellis and horizontal ones make foe method usedfor verlical well drilling cost prediction no long suitable for horizontal ones.