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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CONTRACTOR to provide detailed description and schematics of minimum requirements for access road and drilling location as appendix to contract.

承包商对于通路和井位，要提供最低要求的详细说明以及示意图，并作为此合同的附件。

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This paper discusses the breakeven point engineering volume, break even point unit price, profit and operating safety ratio in the contract of drilling engineering.

探讨了钻井工程承包中盈亏平衡点工程量、平衡点单价、利润及经营安全率等问题。

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There are some risks here for investors to consider: The contract drilling business is competitive, and oil and gas prices are, of course, very volatile.

FORBES: Gurus Dig Deep For Drillers

We believe that if the company continues the trend of strengthening its deepwater and ultra-deepwater assets, its average daily revenues per rig and the gross margins of its contract drilling business will be positively impacted going forward.

FORBES: Shell's Record Transocean Deal Shows The Importance Of Ultra-Deepwater

Scarabeo 9 is a semi-submersible drilling vessel recently built by Yantai Raffles, which will be on contract by Repsol YPF for deepwater exploratory drilling off Cuba.

FORBES: Cuba Chases 5 Billion Barrels of Undiscovered Oil; U.S. Groups Respond