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井下高承压水绕流钻孔套管固设技术

Mao-hu Tian,De-xun Wu

Shandong Coal Science and Technology（2017）

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Abstract
针对井下水文长期观测孔钻孔高承压水绕流问题,根据钻孔地质条件,对绕流原因进行分析研究,提出了套管静压腔内落沙方法,先分层段充填绕流裂隙通道并保护已钻揭含水层,再采用浓浆对套管与孔壁间的环形空隙进行动水条件下的控压、控量连续注浆固管,达到了高压动水状态下钻孔套管安全固设的目的,并满足水文长期观测孔的技术质量要求.
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