Patent ID: 8418989

Claim:
A fluid control system, comprising: a choke assembly comprising: a housing having an inlet passage, an axial bore, and a chamber, wherein a portion of the axial bore forms an outlet passage; and a choke member adapted for movement in the housing to control a flow of a fluid from the inlet passage to the outlet passage; wherein the fluid applies a force on a first end of the choke member; a pressure generating device fluidly connected to the chamber and containing a control fluid, wherein the control fluid applies a first force on a second end of the choke member; and a linear motor configured to apply a second force on the second end of the choke member; a control system to control the second force applied to the second end of the choke member to, in conjunction with the first force applied to the second end, vary a choke member position intermediate an open position and a closed position, thereby controlling a pressure of the fluid in the inlet passage.