Valves for use in wells
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 11, 2001
Grant Date -
N/A
app pub date -
Feb 1, 1999
filing date -
Feb 1, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A valve assembly includes a seat having at least an opening and a first surface. A cover has a contact surface that is slideably and sealingly engaged to the first surface of the seat to form a seal when the contact surface completely covers the at least one opening.
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