Hydraulic choking device

Claim 1

A hydraulic choking device to be installed on a high pressure fluid well member to control flow of fluids from wells which comprises: (a) a choke housing assembly having: (i) a choke housing body provided with an exit passageway having an exit opening at one end and a ball nose plug entrance opening at its opposite end, the passageway being provided with a cavity in its sidewall perpendicular to the passageway, and provided with a shoulder stud perpendicularly attached to the housing body and having a fluid entry passageway opening into the housing body passageway directly opposite the cavity, the shoulder stud being attachable to the fluid well member for the fluid entry passageway to receive the well fluids, (ii) a wear sleeve assembly attached to the choke housing body passageway sidewall at the exit opening end and having an entry wear sleeve and a down stream wear sleeve, the entry wear sleeve having an outwardly flared opening to receive the fluids and direct them through the down stream wear sleeve which is also provided with a flared opening to receive the fluids and direct them through an opening of a ball nose plug seat; (b) a choke actuator assembly having: (i) a choke actuator body sealingly attached to said choke housing body and having a choke actuator passageway extending there through and aligned with said choke housing exit passageway, (ii) sealing means positioned in circular grooves cut in the interior wall surface of said choke actuator body and extending out in sealing contact with said choke plug; and, (c) a drive assembly having means to engage said choke plug body to move said choke plug in sealing contact with said wear sleeve assembly.