MULTIPLE SHUNT PRESSURE UNIT FOR GRAVEL PACKING Russian patent published in 2020 - IPC E21B43/04 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: group of inventions relates to oil and gas industry, in particular to borehole filters. Shell for completion for placement in well borehole comprises: first unit of sand filter, attached to second unit of sand filter, wherein first unit of sand filter comprises assembly of shunting pipes with first breaking pressure, and the second sand filter unit comprises a shunt pipe assembly with a burst pressure less than the first fracture pressure. Shunting system of upper unit of sand filter has higher rated pressure than shunting system of lower unit of sand filter. Wall thickness of the shunting system wall of the upper unit of the sand filter is larger than the thickness of the wall of the transfer pipes of the shunting system of the lower unit of the sand filter.

EFFECT: increased reliability of shell operation, possibility of sedimentation of gravel pack suspension in deep boreholes of wells with possibility of maintaining high pressure of suspension supply.

15 cl, 6 dwg