水射流作为一种新型切割工具运用于石油钻井中，与机械联合破岩可提高破岩效率。

Water jet, as a novel rock cutting tool, can be combined with mechanical method to increase penetrating efficiency.

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实验结果表明，经预处理和生物法联合联合处理后的钻井废水可达到国家污水综合排放一级标准。

The experiment result expresses, after pretreatment and biological method, drilling sewage can attain a class standard of national waste synthetical discharge.

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为提高钻井速度，掌握水力机械联合破岩规律，开展了水力机械联合破岩主要配合参数的实验研究。

Using the experimental device of combined breaking rock, the experiment simulated the conditions at bottom of well in order to study the work-in parameters of combined breaking rock.

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为提高钻井速度，掌握水力机械联合破岩规律，开展了水力机械联合破岩主要配合参数的实验研究。

Using the experimental device of combined breaking rock, the experiment simulated the conditions at bottom of well in order to study the work-in parameters of combined breaking rock.

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