FIELD: oil and gas production.
SUBSTANCE: invention provides lubricating additive for drilling fluids, including weighted ones, contains 60-70% fatty acid esters with triglycerides having 14-24 carbon atoms, 2-4% neutralization agent, 4-26% substituted ammonium salts of C10-C24-fatty acids, 5-25% oligoorganosiloxanes, and water - the balance.
EFFECT: reduced foaming ability with high characteristics of lubricating and antistick properties preserved.
2 tbl
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