Abstract
ABSTRACT Over the last several years, the Dow Chemical Company and Westbridge Oilfield Products have been developing a novel drilling fluid system based on mixed metal layered hydroxide (MMLHC) chemistry. Among the significant advantages that these compounds provide is unparalleled solids suspension capabilities arising from a gel structure that breaks very easily and recovers rapidly. Conventional rheological models do not adequately describe the rheology of this system. Thus, a number of unconventional measurements, based on material science considerations have been utilized to develop a working rheological model from which effects of the fluid on drilling rate, bit usage, hole stability, and drilling fluid cost can be projected.
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