专利名称：Oil and oil invert emulsion drilling fluids with
improved anti-settling properties
发明人：Mahalingam Santhanam,Keith McNally申请号：US09470973申请日：19991223公开号：US06339048B1公开日：20020115
摘要：This invention is of a drilling fluid composition containing a liquid thixotrope,which thixotrope is free of solvents or any other diluent, and is in easily usable, liquidform, pourable at ambient temperatures, and which provides effective and efficientrheological properties when used at low levels in such compositions. In a specific aspect,the invention provides an oil or oil invert emulsion drilling fluid composition containingone or more organoclays, and in addition contains a additive which comprises the reactionproduct of an alkoxylated nitrogen containing compound or a diamine, and one or morepolycarboxylic acids in a specified equivalent ratio.
申请人：ELEMENTIS SPECIALTIES, INC.
代理人：Michael J. Cronin
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