Blowout preventer booster and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 12, 1989
Grant Date -
N/A
app pub date -
Jun 1, 1988
filing date -
Jun 1, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic control circuit and method of operating a blowout preventer having a two-way hydraulic piston and cylinder assembly including an open and close port. An adjustable hydraulic supply is connected to a control valve which is in turn connected to the open and close ports. A pressure booster having an input and an output is connected to the close port and a control circuit is connected to the input of the booster and to the close port for actuating the booster and also blocking flow from the control valve to the closed port when the hydraulic supply increases to a predetermined value.
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Family
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