DRILLING MUD ON HYDROCARBON BASIS Russian patent published in 2013 - IPC C09K8/34 

FIELD: oil and gas industry.

SUBSTANCE: drilling mud on hydrocarbon basis, which includes highly oxidised high-melting bitumen, surface active substance - SAS and diesel fuel, contains highly oxidised high-melting bitumen in the form of 30-40% of solution in xylol or mixture of xylol and diesel fuel with content of xylol in the solvent of 50 to 99%, ABR water-repellent agent as SAS, and in addition rape oil, clay powder or marble, or their mixture in the ratio of 1:1 at the following component ratios, wt %: the above solution of highly oxidised high-melting bitumen 40-75, rape oil 15-40, ABR water-repellent agent 2-5, diesel fuel 0-20, clay powder or fine marble, or their mixture 0-30.

EFFECT: simpler preparation technology of a solution under field conditions and shortening the time required for its preparation at maintaining all its parameters.

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