Patent Number: 6,253,787

Title: Fluid flow and pressure control system and method

Abstract: A system and method for controlling fluid according to which an inlet passage and an outlet passage are formed in a housing and a choke member is movable in the housing to control the flow of fluid from the inlet passage to the outlet passage and to exert a back pressure on the fluid. The movement of the choke member from a fully closed position to an open position is dampened.

Inventors: Suter; Roger (Edmond, OK), Cain; Lester L. (late of Houston, TX)

Assignee: M-I L.L.C.

International Classification: E21B 21/00 (20060101); E21B 21/10 (20060101); F16K 47/04 (20060101); F16K 47/00 (20060101); F16K 031/12 ()

Expiration Date: 07/03/2018