MUD DESANDER Russian patent published in 2002 - IPC

FIELD: mining industry, particularly, well drilling equipment. SUBSTANCE: mud desander consists of a set of sealed troughs with sealing vessels connected to them. Installed in transition hollows of sealed troughs are combs with inclined plates overlapping one another. Combs are made for their vertical motion across section of trough passage channels whose internal upper walls carry flow disturbing members in the form of rack. Installed on outlet passage channel of last sealed trough of desander is a filter. Said filter consists of changeable filter element mounted on rigid frame in the form of concave cylindrical spatial lattice facing the settling vessel with its open internal surface. To clean filter element from particles of settled drillings, turbine wheel is installed on axle where frame is fitted. Turbine wheel rotates by fluid flow and its blades remove drillings settled on filter element and throw them to drillings catcher. To facilitate removal of drillings from settling vessels, vibrator is installed on external surface of settling vessels along axis of desander geometric center of gravity. To reduce losses of mud in unloading of drillings, floating discharge branch pipes ensuring discharge of fluid from settling vessel into receiving vessel are installed. Design of desander allows reduction of minimal size of solid particles of drillings settled in drillings catchers and content of solid phase in desander mud. EFFECT: higher efficiency of well drilling. 2 dwg