DOWNHOLE IN-FLOW PRODUCTION LIMITING APPARATUS Russian patent published in 2021 - IPC E21B33/128 E21B34/06 E21B43/12 

FIELD: mining.

SUBSTANCE: group of inventions relates to a downhole in-flow production limiting apparatus intended for installation in a hole of a downhole tubular metal structure located in the borehole, as well as to a downhole borehole completion system and to a method for completing a borehole to prepare the borehole for optimal production. The downhole in-flow production limiting apparatus comprises a hole of the apparatus and a brine-soluble element configured to prevent the flow from the inside of the downhole tubular metal structure through the hole of the apparatus to the outside of the downhole tubular metal structure before the brine-soluble element is at least partially dissolved in the brine. The brine-soluble element is at least partially made of a magnesium alloy. The brine-soluble element is a part of a valve with a first position and a second position, wherein the valve comprises a valve body and a movable part. Said valve is a functioning valve until the brine-soluble element is at least partially dissolved in the brine.

EFFECT: technical result consists in facilitating installation of a downhole borehole completion system without the need for further downhole operations, including washing or replacement of a mesh filter, and without significant damage to the formation and/or borehole completion components.

16 cl, 6 dwg