BYPASS ARRANGEMENT OF GRAVEL FILTER Russian patent published in 2016 - IPC E21B43/04 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas industry, to designs of gravel packs. Gravel pack operation disposes slurry from an inner string into annulus around a shoe track. Device includes body defining first and second body ports communicating body passage with borehole, an inner string in body passage with an outlet port. Inner string in a first selective position selectively seals outlet port with first body port and communicating gravel pack slurry to borehole. Inner string moved to a second selective position seals outlet port with second body port. First screen disposed on body between first body port and toe and passing fluid returns of gravel pack slurry from borehole into body passage. Bypass is located on body and communicates body passage on one side of first body port with body passage on another side of first body port. Bypass passes fluid returns in body passage past outlet port of inner string.

EFFECT: simplified development of gravel pack, ruling out seizure and erosion service tool.

31 cl, 21 dwg