PACKER Russian patent published in 2016 - IPC E21B33/12 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and is intended for isolation of beds in well construction. Packer is installed on casing string in well and includes a housing with central and inlet channels arranged on body lengthwise-corrugated shell making with its external wall of hydraulic chamber communicated inlet channel, covered with a check valve, with central channel of housing, sealing element arranged outside shell, perimeter of shell after straightening flute shell inside pressure is equal to perimeter of well at packer. Sealing element is installed on entire length of shell, and in inlet channel between check valve and central channel of housing there is aerated, a hollow blinded from side of central channel of valve, made with possibility of breakdown during interaction with cementing plug. Valve cavity on side of shell is covered with radial collar and membrane made with possibility of breakdown as pressure rises inside housing after cementing plug to stop ring. Radial collar is made with possibility of passing liquid from central channel in hydraulic chamber via check valve made in form of self-sealing collars provided with thrusts and protective rings.

EFFECT: technical result consists in improvement of reliability of isolation of beds in well construction.

1 cl, 2 dwg