PRESSURE BALANCED SPRING LOADED OVERTRAVEL SEALING APPARATUS

An apparatus includes a cage and a main plug disposed in the cage. The main plug is movable between a main plug closed position and a main plug open position. A seal assembly disposed on the main plug, the seal assembly having a seal that is configured to contact the cage when the main plug is in th...

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Bibliographische Detailangaben
Hauptverfasser: STARES JAMES ALBERT, THATTE AZAM MIHIR, BOGER HENRY WILLIAM, CUNNINGHAM THOMAS HENRY, WOLFE CHRISTOPHER EDWARD, QI XUELE, SHENG NUO
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An apparatus includes a cage and a main plug disposed in the cage. The main plug is movable between a main plug closed position and a main plug open position. A seal assembly disposed on the main plug, the seal assembly having a seal that is configured to contact the cage when the main plug is in the main plug closed position, and configured to reduce contact with the cage when a pressure differential across the seal is reduced. The apparatus includes a pressure balancing assembly movable between a closed position, an overtravel position and an open position. The pressure balancing assembly is configured to balance the pressure differential across the seal when in the overtravel and open position.