By comparing with normal well bore, the economic efficiency of slim hole drilling was evaluated.

通过与常规井眼对比, 评价了小眼井钻井技术经济效益.

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Through a comparison, the economic benefit in slim - hole drilling for coalbed gas has been analyzed.

通过与常规煤层气试验井对比, 分析了煤层气小井眼钻井的经济效益.

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There are the bigger differences between slim hole drilling technology and routine borehole drilling technology.

小井眼与常规井眼的钻井工艺有较大差异,提高小井眼钻井速度有很大的实际意义.

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