METHOD OF UNLOADING/LOADING OIL TANKER; METHOD OF TRANSPORTATION OR OIL IN TANKER AND SYSTEM OF PIPE LINES AND VALVES FOR OIL TANKER

摘要

FIELD: oil tankers. SUBSTANCE: oil is discharged from group of tanks or supplied to group of tanks at level of bottom maintaining contact between surface of oil and atmosphere formed by saturated gas containing hydrocarbon; this gas is fed from previous group of tanks to subsequent group. Oil is transported in fully filled tanks; risers of tanks also contain oil at level of venting valves. EFFECT: enhanced efficiency. 13 cl, 18 dwg