CEMENTED LINER HANGER Russian patent published in 2021 - IPC E21B33/14 E21B17/14 E21B33/16 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and is intended for the arrangement of wells. The device includes a shoe, a check valve, a stop ring, a plug, a centralizer, a funnel, a disconnector. The plug consists of cuffs mounted on a rod. The centralizer includes upper and lower rings, spring bars. In this case, the shoe consists of a steel body and a drillable polymer insert. Flushing holes are made in the body. Bevels are made in the lower part of the body. The insert contains a check valve and a stop ring. The plug is made with the possibility of fixing in the stop ring. The plug has cuffs of different diameters. A tip, an O-ring and a retainer in the form of a split annular spring are installed at the lower end of the rod. The funnel has an internal thread at the top. A disconnector with a tubing is connected to the funnel by means of a thread.

EFFECT: increasing the reliability of the device, simplifying it, ensuring tightness throughout the column.

1 cl, 1 dwg