PACKER DRILLABLE Russian patent published in 2010 - IPC E21B33/12 

FIELD: oil-and-gas production.

SUBSTANCE: packer drillable contained setting tool, including hydraulic actuator with bottom rest, piston with sub, top and bottom rods. Bottom rod is outfitted by radial channel and is rigidly connected through end cap, allowing working aperture, with punch nipples, allowing punched windows. Seal assembly includes collar, deformed cartridge and mandrel. Inside the tip it is installed intercepting valve, and punched nipple below is capped by stub with nonthreaded fastener. Tip is telescoped inserted directly to deformed cartridge and into lower seat, relative to which tip in over-the-road position is fixed shear screw. Intercepting valve is implemented in the form of plug with external circular sampling. Tip is higher than punched section from the inside is outfitted by spring-load valve with saddle, passing top-down, herewith saddle from the top is implemented inclined to axis of valve.

EFFECT: presence of spring-loaded valve in structure of drilled packer provides implementation of cycling pumping of successively several types of solutions under excessive pressure.

2 dwg