Borehole devices actuated by fluid pressure
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United States of America Patent
Stats
-
Mar 17, 1987
Grant Date -
N/A
app pub date -
Nov 27, 1984
filing date -
Nov 27, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for actuating a tool downhole in a borehole. The apparatus includes a body; a port to admit fluid pressure into the body; and apparatus within the body in fluid pressure communication with the port for actuating the tool in response to (1) a fluid pressure level communicated through the port in excess of a first fluid pressure level greater than the hydrostatic pressure level, followed by (2) a decrease in the fluid pressure level communicated through the port from the first fluid pressure level to a second fluid pressure level less than the first fluid pressure level.
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