（3）泡沫钻井流体（Foam Drilling Fluids） 钻井中使用的泡沫是一种将气体介质（一般为空气）分散在液体中，并添加适量发 泡剂和稳定剂而形成的分散体系。
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... 平衡活度钻井液balanced activity drilling fluids 泡沫钻井液foam drilling fluids 密闭液sealing fluids ...
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The foam drilling fluids has good abilities to resist salt, calcium and crude petroleum. The system can adapt to the production need.
该泡沫钻井液抗盐(NaCl)达到2.0%;抗钙污染达到2.0%;抗原油污染达到15%;抗性显示该泡沫钻井液能够适应地层生产的需要。
参考来源 - 低密度抗高温水包油泡沫钻井液研究·2,447,543篇论文数据，部分数据来源于NoteExpress
It mainly has two parts as follows: theory research of foamed drilling fluids, and practice achievements in foam and foamed drilling technology.
论文主要包括两大部分：一是泡沫流体理论研究，二是泡沫和泡沫钻进技术的实践成果。
The aerated foam mud fluids can used in negative drilling, and enlarge the life of drilling bits for its low density, and low sap pressure.
充气泡沫泥浆由于比重低，液柱压力低，实现了负压钻进，能大幅度提高机械钻进，延长钻头寿命。
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