drilling fluid for strengthening a wellbore; use of drilling fluid; and method for producing drilling fluid

摘要

drilling fluid summary for strengthening a wellbore; use of drilling fluid; and method for producing drilling fluid The invention relates to a borehole strengthening drilling fluid that has nanoparticles and granular particles. In one aspect described herein, the drilling fluid is an inverted emulsion-based fluid. In a further aspect, the nanoparticles are iron hydroxide or calcium carbonate and, in a further aspect, from about 1 to 30 nm in size. In one aspect described herein, the granular particles are graphite or calcium carbonate and, in an additional aspect, up to 250 µm in size. nanoparticles and granular particles plug fractures in the wellbore to strengthen the wellbore.