PACKER Russian patent published in 2002 - IPC

FIELD: equipment and technology of underground repair of wells. SUBSTANCE: invention refers to devices for isolation of intertubular clearance in process of water insulation of face zone, of hydraulic fracture of seams and for other work in gas, oil and water wells. Packer has hollow body which outer surface carries collar with lower rest and upper pressing members, piston with forced-out plug. Pressing members come in the form of racks and are mounted for axial and radial movement. Lower rest of collar is fixed on body by left-hand thread. Steeple with holes in base, adjustable and fixed in axial direction, is installed inside body, under piston. EFFECT: expanded application field, avoidance of usage of additional facilities, prevention of premature wear of oil string, simplified technological process of installation of packer in well. 2 cl, 2 dwg