While drilling in arid water shortage area or in thief zones pump pressurized foam drilling technology may used in wire-line coring.
在干旱缺水矿区或漏失地层中钻孔时，可选择水泵增压装置泡沫钻进工艺用于金钢石钻进绳索取心。
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。
Well logging technology and techniques for gas drilling, foam drilling and casing drilling are summarized and analyzed in this paper.
简要介绍了气体钻井、泡沫钻井和套管钻井等特殊钻井技术。
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