Subterranean well casing float tool
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United States of America Patent
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-
Sep 4, 1990
Issued Date -
N/A
app pub date -
Aug 14, 1989
filing date -
Sep 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A subterranean well casing float tool has a tubular metal housing which is securable to well casing conduit. A valve is carried within the housing and comprises a frame with a valve head and seat carried relative to the frame and biased toward closed position. A compartment includes the valve head for enclosure around a bias, such as a spring, when the valve head is moved away from the valve seat. The valving components are directly secured to the housing by threads having profiled shear surfaces such that the shear area of the valving members is substantially greater than that of the housing.
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