MANIFOLD OF GRAVEL FILTER AND RELATED SYSTEMS AND METHODS Russian patent published in 2019 - IPC E21B43/04 

FIELD: mining.

SUBSTANCE: group of inventions relates to equipment used in underground wells, in particular to gravel filters. System includes manifold arranged with possibility of reciprocating movement in well completion assembly. Manifold contains at least first, second and third channels, which are isolated from each other in manifold. Each of the first, second and third channels crosses one transverse planar section of the manifold. Method includes stages, at which repair column is displaced, at that flow is controlled through windows, which provide communication with outside of manifold, including at least three channels. One window provides communication between one channel and the space outside the manifold, the other window provides communication between the other channel and the space outside the manifold. In one position of repair column such one channel is interconnected with well annular space through other window, providing communication with outside of manifold, and such one channel is interconnected with other well annular space through such one window. Annular spaces are isolated from each other by packer, and other window is located in seal opening and is located longitudinally between other windows.

EFFECT: higher stability of well shaft, reduced time of assembly and manipulations with repair column, reduced length of completion layout, increased convenience of system operation.

33 cl, 12 dwg