FIELD: oil-and-gas production.
SUBSTANCE: in compliance with proposed method, well is killed, blowing valves and accessories are dismantled up to case head whereon blowout equipment is mounted. Well tubing is withdrawn from the well, blowout equipment is removed to mount coiled tubing equipment that comprises preventer unit. Flexible pipe is lowered into the well, up to its bottom, connected with pump unit to inject mortar via flexible pipe in amount sufficient for well shaft filling and to lift said flexible pipe along well shaft to its head. After mortar thickening, coiled tubing equipment with preventer unit is dismantled to mount bypass coil and central gate valve. String and pip heads as well as central; gate valve are filled with mortar. All branch pipes and top flange of central gate valve are stopped by blank flange and. Thereafter, benchmark is installed.
EFFECT: higher reliability and safety at minimum costs.
2 dwg
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