Title: Method for preparing humic acid Si type agent of aq. drilling slurry
Application Number: 85100757 Application Date: 1985.04.01
Publication Number: 1000378 Publication Date: 1986.03.10
Approval Pub. Date: Granted Pub. Date: 1986.09.17
International Classifi-cation: C09K7/02
Applicant(s) Name: Shanxi Coal Chemical Research Inst.,Chinese Academ Address:
Inventor(s) Name: Li Shanxiang, Li Yansheng, Liu Anjian, Sun Shuhe,
Attorney & Agent: ZHANG CHENGHUA
Abstract:
     This agent applicable in the drilling for petroleum, naural gas or the tenrestrial heat, is made from the nitrified products of weathered coal or brown coal or mixutre of both, or from the reaction product of purified humic acid and chlorosilanes. the slurry traeted by this agent will gain the quality of being resistant to high-temperature-denaturing and slow down the process of dewatering. In addition, it will exhibit good lubracating property and will show both hydrophilic and hydrophobic properties. Therefore, the agent possesses good ability of inhibiting the cave-in coused by expansion of the shale due to hydration and/or by structural stress.
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