Patent ID: 6536473
Filing Date: 2003-03-25
Classification: E21B,F16K,Y10T

Abstract:
A choke valve for controlling pressurized fluid flow in a line, comprising:a valve body forming an inlet bore, a component bore and an outlet bore; each bore having an inlet and an outlet; the component bore connecting the outlet of the inlet bore and the inlet of the outlet bore; a flow trim positioned in the component bore for controlling flow through the bores, said flow trim comprising a tubular cage having upstream and downstream ends, said cage having a side wall with an inner surface forming a longitudinal bore, said cage side wall forming flow ports extending therethrough at its upstream end, and a tubular sleeve operative to slide along the cage to throttle the ports; means, extending into the component bore, for biasing the sleeve along the cage; means for sealing the flow trim and biasing means within the component bore; the cage being formed of harder material than the body; the cage side wall forming an inwardly protruding lip at the downstream end of the cage bore for deflecting fluid passing through the valve toward the center of the valve body outlet bore to thereby reduce erosion of the valve body immediately downstream of the cage.