ANNULAR BARRIER FOR EQUIPPING WELLS WITH INDUCTIVE SYSTEM Russian patent published in 2020 - IPC E21B33/127 

FIELD: drilling of wells.

SUBSTANCE: invention relates to a downhole system for equipping a well with downhole wireless transmission of energy and signals, comprising: first well tubular structure, a second well tubular structure located partially inside first well tubular structure, first electric unit comprising a first part of inductive coupling element, located on outer surface of first well tubular structure and electrically connected to electric conductor, annular barrier configured to expand in annular space between first well tubular structure and wellbore wall or other downhole tubular structure inside well to provide zone isolation between first zone having first pressure and second zone. Annular barrier comprises: tubular metal part for installation as part of first well tubular structure, wherein tubular metal part has first expansion hole, axial elongation and outer surface, expanding bushing surrounding tubular metal part and having inner surface facing tubular metal part, and outer surface facing well bore wall, first connecting part and second connecting part configured to connect first end and second end of expandable sleeve with tubular metal part, respectively, annular space between inner surface of expansion bush and tubular metal part. Annular barrier additionally comprises electric conductor, passing outside tubular metal part and inside expanding bushing from first connecting part to second connecting part, and a second electrical unit comprising a second portion of the inductive coupling member disposed within the first well tubular structure and outside the second well tubular structure and adapted to abut on inner surface of well tubular structure. First electrical unit is configured to transmit energy and/or signals to the second electrical unit. Present invention also relates to annular barrier.

EFFECT: technical result consists in elimination of reduction of internal diameter of well or increase of total outer diameter of well.

18 cl, 8 dwg