FIELD: oil and gas production.
SUBSTANCE: invention refers to oil and gas industry, in particular to methods for completion of wells. Method describes performance of technological operations for primary opening of payout bed. Production string is lowered in well with sealing device, which separates well into upper and lower cavities. At the same time hydraulic connections "wellhead - upper cavity" and "lower cavity - payout bed" are maintained, accordingly. Well equipment is lowered down to sealing device, then lowered through sealing device into lower cavity of well, and hydraulic connection "wellhead - upper cavity - lower cavity - payout bed" is restored. Then payout bed is opened, and well is deepened. After opening of payout bed, well equipment is withdrawn from lower cavity of well, sealing device is closed, breaking hydraulic connection "wellhead - payout bed". On completion of drilling operation and withdrawal of drilling string from well, tail is lowered into its lower cavity with its further cementing.
EFFECT: method makes it possible to reduce time of action of direct hydraulic connection "payout bed wellhead", and also increases efficiency and quality of well completion.
4 dwg
