Flow control device

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Reexamination Certificate

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Details

C166S316000, C166S334100, C138S043000, C251S127000

Reexamination Certificate

active

07455115

ABSTRACT:
A choke that is usable with a well includes an inlet port and an outlet port. The choke also includes pressure drop stages between the inlet port and the outlet port. Each of the pressure drop stages is adapted to create part of an overall pressure differential between the inlet and outlet ports.

REFERENCES:
patent: 3381708 (1968-05-01), Chenoweth
patent: 3491838 (1970-01-01), Wilder
patent: 3595315 (1971-07-01), Alley
patent: 3735813 (1973-05-01), Mack et al.
patent: 3920044 (1975-11-01), Gruner
patent: 4634095 (1987-01-01), Taylor
patent: 4858644 (1989-08-01), Decker
patent: 5096004 (1992-03-01), Ide
patent: 5141056 (1992-08-01), Tailby
patent: 5415202 (1995-05-01), Shiffler et al.
patent: 5911285 (1999-06-01), Stewart et al.
patent: 6250806 (2001-06-01), Beshoory

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