Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1997-07-21
1999-09-28
Schoeppel, Roger
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
1663344, 166363, E21B 3406
Patent
active
059572086
ABSTRACT:
A flow control apparatus and associated methods of using provide enhanced longevity and reliability without requiring complex mechanisms. In a described embodiment, a choke for use within a subterranean well has multiple trim sets which may be individually selected by manipulation of a sleeve relative to an inner tubular cage. In another described embodiment, a single trim set is provided. Additional features include provision of a separate valve to selectively permit or prevent fluid flow through the single or multiple trim sets.
REFERENCES:
patent: 4569370 (1986-02-01), Witt
patent: 4848472 (1989-07-01), Hopper
patent: 4896722 (1990-01-01), Upchurch
patent: 5316084 (1994-05-01), Murray et al.
patent: 5431188 (1995-07-01), Cove
Master Flow Valve, Inc catalog, undated.
Halliburton Energy Service,s Inc.
Imwalle William M.
Schoeppel Roger
Smith Marlin R.
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