FIELD: gas industry.
SUBSTANCE: group of inventions relates to the field of hydrocarbon production from multilateral boreholes. In implementation of the method, the main wellbore is drilled, the main wellbore is completed and intensified, sealed by transitioning the drilling fluid water extraction apparatus to the closed position, the side wellbore is drilled extending from the main wellbore, a connection providing mechanical access and hydraulic connection with the side wellbore and providing connection with the main wellbore is introduced, a drilling fluid water extraction apparatus is installed in the upper part of the equipment for completing the main wellbore, the side wellbore is intensified through the connection, wherein the drilling fluid water extraction apparatus is in the closed position, and the main wellbore is depressurised, ensuring the passage of a mixed flow from the main wellbore and the side wellbore. The drilling fluid water extraction apparatus therein has an open position wherein the fluid can pass through the apparatus, and a closed position wherein the fluid cannot flow through.
EFFECT: possibility of automatically directing objects and liquids for acid treatment for intensifying the inflow into the side wellbore and isolating the completion area of the main wellbore during the construction of the multilateral borehole.
10 cl, 15 dwg
