PROCESS OF WELL DRIVING Russian patent published in 2002 - IPC

FIELD: oil industry. SUBSTANCE: process can be used while developing oil field at moments of consolidation of network of production and injection wells, while drilling new wells in new oil fields. Process includes successive sinking of casing strings into well while it is drilled out with installation of lower part of next casing string beneath lower part of preceding casing string and pressure grouting of string clearance. In accordance with invention casing string next to the last is set on rubber packers positioned in upper and lower parts of this casing string. Drilling out of well being completed packers are transferred to transportation position and casing string next to the last is withdrawn from well. Then last casing string is sunk and space formed behind last casing string is grouted. EFFECT: increased quality of pressure grouting of string clearance.