Stromningsregulerende anordning

摘要

A flow control device (12) for hydrocarbon wells comprises an outer sleeve (13) having at least one aperture (14) through its wall, an inner sleeve (15) having at least one aperture (16) through its wall and means for providing relative sliding movement of the sleeves between "open" positions allowing variable flow of fluid through the apertures of the sleeves and "closed" positions, wherein an edge region of the at least one aperture of one of the sleeves includes erosion resistant means (25).