DRILLING FLUID ADDITIVES

专利名称：DRILLING FLUID ADDITIVES

发明人：Yoshizi Saito,Masaru Nakamura,Toyoshi

Iida,Tsugunori Honda

申请号：US06/678840申请日：19841206公开号：US04594169A公开日：19860610

摘要：Drilling fluid additives are prepared by complexing humic acids and/or lignins,with three compounds of zirconium, nickel and iron. The metal composition of theadditives is 1.3 to 2.5% of zirconium, 0.8 to 1.5% of nickel and 0.8 to 1.5% of iron, and istotally 3.0 to 5.5%. Thus, the drilling fluid additives, containing no chromium, can be usedin wide temperature range for the drilling of oil, geothermal or gas wells with lessgelation even by various contamination and cause no serious environmental pollution.

申请人：JAPAN METALS AND CHEMICALS CO., LTD.

代理机构：Parkhurst & Oliff

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