TY JOUR TI LUBRICANT ADDITIVE FOR DRILLING FLUIDS BASED ON LOCAL RAW MATERIALS KW drilling KW well flushing KW drilling mud KW lubricants JO Bulletin of the Angarsk State Technical University AU Scherbin, S.A. PY 2023 IS 1 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»