DRILLING MUD Russian patent published in 2014 - IPC C09K8/36 

FIELD: oil and gas industry.

SUBSTANCE: drilling mud containing hydrocarbon phase and surface-active substances, weighing agent, mineral salts, a stabilising agent and water includes MULTIOL additive as hydrocarbon phase and surface-active substances, MULTISTAR additive, xanthane gum and additional sodium hydroxide as a stabilising agent with the following ratio of the components, wt %: MULTIOL additive 8.5-25, MULTISTAR stabilising agent 1.5-2.0, xanthane gum 0.2-0.5, calcium carbonate 5-20, magnesium chloride 4-15, sodium hydroxide 1-2, water - the remaining quantity. Invention is developed in dependent claims.

EFFECT: improvement of inhibiting and lubricating properties.

8 cl, 2 ex, 2 tbl