GEAR FOR SELECTIVE INSULATION OF POOLS AND MECHANISM CONNECTING MODULES OF THIS GEAR Russian patent published in 2002 - IPC

FIELD: insulation of pools in oil industry. SUBSTANCE: gear includes body with packing units on ends, drive in the form of cylinder that opens packers. Drive is put on body with ring piston-wedge placed in space between body and cylinder. There are ducts for flow of solutions. Recess is made in ring piston-wedge. It houses outer wedge comprising at least two separate parts. They are mounted for sliding along surface of inner wedge. Outer surface of outer wedge is made up of interconnected modules. No-return valve is positioned in space between body and cylinder. Mechanism connecting modules includes coupling to join tubes of body and end bushings with adapter coupling bushings. Pockets with ribbed internal surface for filling with cement mortar which sets quickly in case of leak of phase of mortar are made between end bushings and adapter. EFFECT: increased efficiency of insulation. 2 cl, 4 dwg