METHOD OF PRODUCING WELLS OPERATION Russian patent published in 2000 - IPC

FIELD: oil production. SUBSTANCE: method may be used in maintenance of continuous optimal differential pressure on formation, reduction of probability of formation of paraffin and hydrate plugs. The method provides for withdrawal of fluid from formation into well, its overflow into tubing string and lifting to surfaces. Fluid is overflown into tubing string under critical conditions of flow corresponding to preset fluid flow rate and to value of pressure differential acted on formation. Pressure in tubing string is maintained at level corresponding to minimum permissible according to conditions of product recovery in oil field. EFFECT: higher efficiency of formation energy utilization. 2 cl