| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: invention concerns oil-and-gas producing industry, particularly devices designed for well casing with casing liners. It comprises a liner proper with a funnel in the top, radial apertures, an external packing unit, an anchor with an annular space, a shipping stand with a seat, a bushing with a seat fixed in the top of the washover string the shear element and overlapping the radial apertures of this string. The device enables hydraulic connection of a cavity of the shipping stand with the annular space of the anchor through radial apertures of the washover string and the liner while installing the bushing on the seat and following actuation, and also actuation of the external packing unit. ^ EFFECT: inventions allow simplifying the device design, improving reliability of its operation and hermetic sealing of bore hole annulus. ^ 3 cl, 1 dwg |
