Abstract: The invention relates to the oil and gas production industry, in particular, to development and production of oil reservoirs with various permeability zones, specifically, with lateral/lateral horizontal holes, drilled from the production casing. The method described includes running into the well of a tubing string with a cable, control devices in form of electrical valves, measurement pressure and temperature sensors, and one or more packers for isolation of the downhole space, in which information from the sensors is passed to the measurement unit at the wellhead, and signals for opening/closing of the control devices are transferred from the wellhead control unit by the cable. A device for carrying out this method is also described.

Abstract: A method of well casing permitting thermal oil recovery includes drilling a wellbore to the top of productive formation, casing the wellbore with a casing string, drilling through the productive with a smaller diameter bit, running in a sand screen to the productive formation and subsequent drainage or heat carrier injection into the formation. The sand screen contains longitudinally-corrugated pipes with slots, mutually connected by the end cylindrical portions with a limited longitudinal shift possibility. Besides, the sand screen slots are internally hermetically sealed with a thermoplastic material. Running-in of the screen down to the target depth, include creating an internal excess pressure to expand the sand screen along its entire length except for cylindrical sections, fixing and hermetical anchoring to the casing. Pumping-in of a heat-carrier, under influence of which the thermoplastic material melts up, unseals the slots.

Abstract: A method of well casing permitting thermal oil recovery includes drilling a wellbore to the top of productive formation, casing the wellbore with a casing string, drilling through the productive with a smaller diameter bit, running in a sand screen to the productive formation and subsequent drainage or heat carrier injection into the formation. The sand screen contains longitudinally-corrugated pipes with slots, mutually connected by the end cylindrical portions with a limited longitudinal shift possibility. Besides, the sand screen slots are internally hermetically sealed with a thermoplastic material. Running-in of the screen down to the target depth, include creating an internal excess pressure to expand the sand screen along its entire length except for cylindrical sections, fixing and hermetical anchoring to the casing. Pumping-in of a heat-carrier, under influence of which the thermoplastic material melts up, unseals the slots.