US2008029273A1PendingUtilityA1
Valve
Est. expiryJun 24, 2024(expired)· nominal 20-yr term from priority
Inventors:Giancarlo Pia
E21B 2200/05E21B 34/102
21
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Claims
Abstract
A downhole valve comprises a body defining a through bore and a valve member for location in the body and movable between an open position and a closed position. The valve has a first configuration in which the valve member is normally closed, and will hold a pressure differential in a first direction, and a second configuration in which the valve member is closed and will maintain a pressure differential in the first direction, and also in an opposite second direction and a third configuration in which the valve member is locked in the open position until it is deliberately closed.
Claims
exact text as granted — not AI-modified1 . A downhole valve comprising:
a body defining a through bore; and a valve member for location in the body and movable between an open position and a closed position, the valve having a first configuration in which the valve member is normally closed, and will hold a pressure differential in a first direction, and a second configuration in which the valve member is closed and will maintain a pressure differential in said first direction and also in an opposite second direction.
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