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Application filed by American Gilsonite CofiledCriticalAmerican Gilsonite Co
Publication of MY105239ApublicationCriticalpatent/MY105239A/en
Agricultural Chemicals And Associated Chemicals
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Abstract
A WATER-BASED DRILLING MUD ADDITIVE COMPRISING A PRE-BLENDED COMBINATION OF ABOUT 2 PARTS OF HIGH SOFTENING POINT UINTAITE, ABOUT 1 PART OF A LOWER SOFTENING POINT UINTAITE, ABOUT 1 PART OF CAUSTICIZED LIGNITE, AND A STRONGLY LIPOPHILIC, NON- IONIC SURFACTANT IS DISCLOSED. THIS COMPOSITION DECREASES SHALE SLOUGHING AND BOREHOLE INSTABILITY DURING DRILLING OF WELLS.