Evaluation of the service life of a rotary drilling line is of great importance to ensuring safe drilling and reducing drilling cost.

钢丝绳使用寿命评定对确保钻井安全与降低钻井成本具有十分重要的意义。

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It has less effect on the filter loss in increasing viscosity and shear, thus meeting the demands of fast and safe drilling relatively well. 1.

在提粘、提切的情况下，对滤失量影响较少，能较好地满足快速安全钻井的要求。

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It is very important to measure the volume change of mud in mud pit for the safe drilling, the control of well blowout and the lost of circulation.

测量泥浆池中泥浆体积的变化对于安全钻井，控制井涌、井漏具有十分重要的意义。

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This method of drilling is not federally supervised under the Safe Drinking Water Act.

VOA: special.2009.10.23

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?

In fact, our oil production last year reached its highest level since 2003, and we want to encourage more safe, responsible drilling where we can.

WHITEHOUSE: Weekly Address: Gas Prices & Energy Security

And because of that, the President believed it was important to pause additional deepwater drilling, but has asked the national commission that will look into the regulatory framework that we must have going forward to ensure drilling is safe, that they can and should look at the framework around deepwater drilling first and report back to him as soon as they can.

WHITEHOUSE: Press Briefing on BP Oil Spill