Full cooperation and assistance of the drilling contractor is required in almost every instance.

几乎每一个场合都需要钻井承包商的协作和帮助。

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The depth in a drilling well at which the drilling contractor receives a lump-sum payment for reaching a particular milestone.

钻井承包商钻达到特定关键点而获得一次性总付款时所到达的井深。

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The contract depth is specified in a legal agreement between the operator, who pays for the well, and the drilling contractor, who owns and operates the drilling rig.

合同深度特规定在作业商(为井眼付款方)与钻井承包商(钻机拥有并作业的一方)的法定合同中。

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Brian Taylor of the drilling contractor KCA Deutag said he believed 10 of his crew were on board.

BBC: 'No hope' of helicopter survivors

Transocean, the world's largest offshore drilling contractor, said its top priority is safety.

CNN: Rig survivors: BP ordered shortcut on day of blast

Overlooked is the world's largest land drilling contractor, NABORS INDUSTRIES (68, NBR) .

FORBES: Drilling for Dollars