NEW AND IMPROVED WATER-BASED DRILLING FLUID FOR USE IN SHALE FORMATIONS
A WATER-BASED DRILLING FLUID FOR USE IN SHALE FORMATIONS HAVING A GIVEN AVERAGE PORE SIZE HAS SOLUTES DISSLOVED THEREIN SIZED SO AS TO ALLOW THE PORES OF THE SHALE FORMATION TO AT LEAST PARTIALLY RESTRICT THE SOLUTES. FOR PURPOSES OF ENHANCING THE RESTRICTION OF THE SOLUTES BY THE SHALE PORES, THE D...
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