HIGH FLOW RATE MULTI-ARRAY STIMULATION SYSTEM Russian patent published in 2016 - IPC E21B34/06 E21B43/26 

FIELD: oil industry.

SUBSTANCE: group of inventions relates to a downhole assembly for processing a hydrocarbon-bearing bed and, in particular, to its multiple hydraulic fracturing per single operation. Downhole assembly comprises at least two sliding sleeves, each sliding sleeve further comprising a housing having an outer diameter, an inner diameter, a first port allowing fluid communication between inner diameter and outer diameter, and a second port allowing fluid communication between inner diameter and outer diameter longitudinally offset from first port. There is an insert located within inner diameter of housing and having an outer insert diameter, an inner insert diameter, a releasable seat, a shifting profile, and a first position within housing, wherein fluid flow through first and second ports is blocked. There is a pusher for activating releasable seat to facilitate movement of insert between a first position and a second position. Insert allows fluid flow through first port and pusher is released. Pusher engages insert to facilitate movement of insert between second position and a third position. Insert provides fluid flow through at least second port.

EFFECT: technical result is increased reliability of operation of the downhole assembly.

21 cl, 14 dwg