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This paper presents a method to select PDC bits. This method USES a correlation between shear strength and drilling cost estimation per unit length.
介绍了利用剪切强度和单位进尺钻井成本的关系来进行PD C钻头选型的新方法。
Replacing diesel by diesel-natural gas as the fuel for drilling engine unit in natural gas field is one of the effective ways for improving economic benefit and reducing development cost.
天然气气田钻井发动机机组燃料由柴油改为柴油-天然气双燃料，是提高经济效益、降低开发成本的有效途径之一。
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