METHOD OF STUDYING PROCEDURE OF TANK CLEANING FROM OIL RESIDUES Russian patent published in 2014 - IPC B08B9/08 G09B25/02 

FIELD: oil and gas industry.

SUBSTANCE: in the method of studying procedure of tank cleaning from oil residues that includes delivery of detergent to the tank and removal of residual impurities according to the invention a model of a cleaned tank is calibrated by process water, after its drainage the tank is filled with an operating fluid that simulates oil residues; thereafter the operating fluid is pumped at the preset temperature to a vacuumised receptacle through the connecting line at a fixed hydraulic resistance, the cleaning parameters are registered against time and the level of the operating fluid in the tank and the receptacle. Besides the operating fluid with the following composition in wt % can be used as an oil residue simulator: fuel oil - 25; summer diesel oil - 5; silica sand with particle size less than 0.5 mm - 3; silica sand with particle size of 0.5-1mm - 3; silica sand with particle size more than 1 mm - 1; powdered iron oxide - 3; water solution of Labomid-101 detergent - remaining volume.

EFFECT: eliminating the above deficiencies in the known engineering solutions and improving efficiency of studies related to vacuum cleaning of horizontal oil tanks from oil residues in conditions of variable mirror area of oil wastes, increasing flow measurement accuracy while removing oil wastes of variable composition at different temperature.

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