DOWNHOLE FLOW DIVIDER Russian patent published in 2024 - IPC E21B21/08 E21B33/127 E21B37/00 

FIELD: well drilling.

SUBSTANCE: invention is related to flushing devices operating in the well. The downhole flow divider includes a body made in form of a drill pipe, with upper and lower radial channels, with a flow divider with pipe and annular axial channels, interacting with a movable sleeve with an airtight seal. The movable bushing is made with the possibility of rotation and axial movement along the entire length of the body moving when drilling wells, and is additionally equipped with centralizers and a transport position lock. The tubular axial channel communicates with the upper radial channels, which overlap during direct circulation with a spring-loaded cylinder. The upper end of the pipe axial channel is equipped with a poppet check valve, and the lower end of the pipe axial channel is in communication with the cavity of the drill pipes. The annular axial channel in the upper part is equipped with a disk check valve and communicates in the lower part through the lower radial channel with the annulus. The airtight seal is reinforced with plates covering the inflatable chamber with an inflation limiter. The spring-loaded cylinder is configured to close the upper radial channels while simultaneously opening the channels of the ejector pump. The transport position lock is designed to engage with the locking groove of the housing during direct flushing and release from the locking groove of the housing when inflating the inflatable chamber during backwashing.

EFFECT: expanding the functionality of the flow divider.

1 cl, 2 dwg