FILTER CONTROL HPHT ADDITIVE FOR OIL-BASED DRILLING FLUIDS WITH PETROLEUM COKE
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United States of America Patent
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Jun 15, 2017
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Dec 11, 2015
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Dec 11, 2015
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Abstract
A method for controlling filtration loss during drilling to a downhole hydrocarbon bearing formation by drilling with a drilling fluid containing a filtration control additive that is made up of petroleum coke particles impregnated with a cationic surfactant and coated with a butadiene-styrene polymer.
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