Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1986-12-15
1987-12-01
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
Fluid operated
166242, E21B 3410
Patent
active
047097620
ABSTRACT:
A well tool having a housing which includes a pressure reducing and fluid velocity reducing passageway. The passageway is formed by first and second vertically positioned members spaced from each other. The first member includes a tapered surface having plurality of grooves and ridges and the second member includes a tapered surface facing the grooves and ridges. Threads are provided for longitudinally moving one of the members relative to the other member for adjusting the space between the members thereby adjusting the size of the passage way. The one member may include an outer portion of the housing or may include a sleeve inside of the housing. A lock is provided for locking the first and second members together after adjustment of the size of the passageway.
REFERENCES:
patent: 3845818 (1974-11-01), Deaton
patent: 3938589 (1976-02-01), Mott
patent: 4007798 (1977-02-01), Gazda
patent: 4161219 (1984-02-01), Pringle
patent: 4325431 (1982-04-01), Akkerman
patent: 4373587 (1983-02-01), Pringle
patent: 4431054 (1984-02-01), Woodman
patent: 4454913 (1984-06-01), Guidry et al.
patent: 4569398 (1986-02-01), Pringle
Camco Incorporated
Melius Terry Lee
Novosad Stephen J.
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