DISCONNECTOR Russian patent published in 2013 - IPC E21B17/06 E21B23/04 

FIELD: oil and gas industry.

SUBSTANCE: disconnector includes a hollow housing with a bore, a reducer with holes, a load with an annular bore and a restrictor on lower end in an axial channel, fasteners in the form of balls, which are installed in the reducer's holes with possibility of interaction with the load and the hollow housing. The reducer includes a crossover, in which a nut is installed, a spring-loaded annular piston with a seat under the ball valve and a collet grip with petals passed through the nut to the axial channel of the reducer. The load is equipped with an annular bore with a cylindrical projection on upper end and a through axial channel; at that, on outer surface of the load there made are annular grooves and installed are seals, above and below fastener location place, and the reducer is installed in the axial channel of the hollow housing with possibility of axial movement and is equipped with a stop nut and a seal.

EFFECT: possibility of emergency-free lowering of downhole equipment, possibility of pressure supply of working fluid to the device, with transfer to the well cavity, possibility of controlled detachment of the disconnector from the downhole equipment.

3 dwg