DRILLABLE PACKER Russian patent published in 2013 - IPC E21B33/1295 

FIELD: oil and gas industry.

SUBSTANCE: drillable packer includes a shaft with a notch on outside surface, a sealing element, upper and lower disruptive rams, with upper and lower cones, a movable upper support and a fixed lower support, a fastener in the form of split spring rings in an annular bore of the movable support, a nipple in an axial channel of the shaft, which is connected through the left adapter to a hollow plunger of a hydraulic setting device, a fixed support with a spring-loaded shoe valve in the form of a housing with radial holes and a sealing cup installed on the seat. The nipple is equipped with a pusher, with an annular bore at a connection point, in the axial channel of which there installed is a piston with a bar and a sleeve, which is equipped with radial holes and rigidly attached to the pusher. The shoe valve is equipped with a seat, at the connection point of the housing of the shoe valve with the nut equipped with a shell resting on the spring, in the axial channel of which there is a seat on the internal annular projection and a spring-loaded ball valve is installed. A sleeve is equipped with longitudinal slots on the end and passed through the axial channel of the seata to the axial channel of the shoe valve with possibility of the end interaction with the spring-loaded ball valve. The bar is passed through an axial channel of the sleeve so that it goes beyond its end and forms together with it an annular gap hydraulically attaching the cavity of the packer to the axial channel of the pusher.

EFFECT: avoiding conditions of occurrence of a hydraulic impact.

4 dwg