Based on the multivariable random drilling model, the multi objective reliability optimization of deep well drilling parameters is presented.

在多元随机钻井模式理论的基础上，提出了深井钻井参数多目标可靠性优化方法。

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Propagandists built up Wang Jinxi, one of the drilling foremen in the field's early days, into a model worker who did not hesitate to risk his life for the good of the people.

宣传机构把王进喜这一早期油田的钻井工人，塑造成为一个为了人民的利益可以毫不犹豫拿自己生命冒险的模范工人。

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Cordless drill: a 12-volt model will handle most drilling tasks.

无绳钻头：一个12伏型号的将会处理大部分钻井任务。

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With that in mind, the Environmental Defense Fund, Southwestern Energy and other progressive gas producers and environmental groups are working to develop a model regulatory framework for safe drilling that can serve as the foundation for better operations.

WSJ: Is Natural Gas the Road to a Clean Energy Future?