SWELLING PACKER Russian patent published in 2019 - IPC E21B33/12 

FIELD: sealing elements.

SUBSTANCE: invention relates to the swelling packers. Swelling packer contains a hollow barrel with threaded ends, installed on the hollow barrel sealing elements, made of a swelling elastomer, protective rings fixed on the hollow barrel at the sealing elements end sections, and the retainer ring. On the sealing elements end sections the separating rings are installed, fixed on the hollow barrel with the help of fasteners and made with a locking part (ledge-recess). Centralizers are installed with a gap "S" from the separating and protective rings. Retainer ring is made with a cap and with a lock part (ledge-recess) on the barrel. Number of consecutively installed retainer rings, separating rings and sealing elements is determined by the packer length.

EFFECT: technical result is increase in the sealing elements on the hollow barrel fastening reliability.

3 cl, 7 dwg