With regard to the leakiness and the formation’s low bearing pressure ability of Jiulongshan structure, various leak stoppage plans were experimented.
优选了九龙山构造深井高密度钻井液体系，提出了改善高密度钻井液流变性的
施。
词With regard to the leakiness and the formation’s low bearing pressure ability of Jiulongshan structure, various leak stoppage plans were experimented.
优选了九龙山构造深井高密度钻井液体系，提出了改善高密度钻井液流变性的施。
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