Patent ID: 7699075

Claim:
A choke valve for use in reverse flow when mounted on a wellhead or manifold, the choke valve comprising: a valve body forming a T-shaped bore comprising a vertically extending bottom opening and a horizontally extending side opening; a bonnet connected with and closing the upper ends the body, the bonnet being disengagably connected with the body; a flow trim positioned in the T-shaped bore, the flow trim comprising a tubular cage having a side wall forming an internal bore aligned with the body bottom opening, and a plurality of flow ports formed in the side wall at the body side opening, each of the plurality of flow ports being positioned only at the body side opening for alignment with the body side opening, whereby in reverse flow mode in the valve body, fluid from the bottom opening enters the cage and exits only through the plurality of flow ports directly into the body side opening, the flow trim further comprising an external flow collar or internal plug for sliding along the cage side wall to throttle the plurality of flow ports; and a stem extending through the bonnet, for biasing the flow collar or plug.