FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil-producing industry, particularly to method of sealing of well mouth. It includes mounting of preventer with casing head, allowing nozzle, on casing pipe, location nearby packer mouth with mechanical drive, taken out on original ground through the supporting pipe, insulation of bottom part of well against preventer by erection of packer, well filling higher than packer by process liquid, sealing through the preventer of supporting pipe, creation inside the preventer through the branch of casing head of testing pressure, implementation of technological isolation, pressure change valuation, conclusion about tightness or leakage of preventer, pressure release in preventer, depressurisation of preventer, packer releasing, discharge of process liquid from the space above packer into well and removing of packer with drive and supporting pipe from well.
EFFECT: providing of simplicity and reliability during operation, and also provides definition of preventer tightness on well.
2 dwg, 1 ex
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|
RU2719879C1 |
