PACKER Russian patent published in 1998 - IPC

FIELD: oil and gas production industries. SUBSTANCE: this relates to devices used for hermetic isolation of annular space of well. Packer can be reliably demobilized and removed from well. It has hollow barrel connected with pipe string. In addition, device is provided with sealing members, slips, upper and lower cones, bush, and sleeve. Cones are used for wedging of slips in pipe string. Bush is connected with barrel through shear members. It is additionally fixed relative to barrel by supporting cams. Sleeve has radial holes in its side surface. Bush also has radial holes in side surface and is provided with seat for example for ball. Bush can be moved with release of supporting cams and displacement of sleeve for unlocking of device and mating its radial holes with radial holes of bush. EFFECT: higher efficiency. 3 dwg