Generalized are the trends of scientific-research works in the field of oil gathering and treatment in Tatarstan, carried out by JSC "Tatneft" researchers and specialists during last 15 years. II is shown, that based on the new mechanism of destroying emulsions in the presence of deemulsifyer at turbulent flow regime, 14 highly efficient technologies and processes of oil gathering and treatment have been designed, tested and implemented on JSC "Tatneft" oil fields.