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1. AU1999053915 - Axial pressure equalizing valve for a well safety valve

Office
Australie
Numéro de la demande 53915/99
Date de la demande 04.08.1999
Numéro de publication 1999053915
Date de publication 04.05.2000
Type de publication A
CIB
E21B 34/10
ECONSTRUCTIONS FIXES
21FORAGE DU SOL OU DE LA ROCHE; EXPLOITATION MINIÈRE
BFORAGE DU SOL OU DE LA ROCHE; EXTRACTION DU PÉTROLE, DU GAZ, DE L'EAU OU DE MATÉRIAUX SOLUBLES OU FUSIBLES OU D'UNE SUSPENSION DE MATIÈRES MINÉRALES À PARTIR DE PUITS
34Aménagements des vannes pour les trous de forage ou pour les puits
06dans les puits
10actionnés par un fluide de commande provenant de l'extérieur du trou de forage
E21B 34/00
ECONSTRUCTIONS FIXES
21FORAGE DU SOL OU DE LA ROCHE; EXPLOITATION MINIÈRE
BFORAGE DU SOL OU DE LA ROCHE; EXTRACTION DU PÉTROLE, DU GAZ, DE L'EAU OU DE MATÉRIAUX SOLUBLES OU FUSIBLES OU D'UNE SUSPENSION DE MATIÈRES MINÉRALES À PARTIR DE PUITS
34Aménagements des vannes pour les trous de forage ou pour les puits
CPC
E21B 34/101
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
34Valve arrangements for boreholes or wells
06in wells
10operated by control fluid supplied from outside the borehole
101with means for equalizing fluid pressure above and below the valve
E21B 2200/05
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
2200Special features related to earth drilling for obtaining oil, gas or water
05Flapper valves
Déposants Camco International, Inc.
Inventeurs Deaton, Thomas M.
Données relatives à la priorité 60095585 06.08.1998 US
Titre
(EN) Axial pressure equalizing valve for a well safety valve
Abrégé
(EN) A subsurface valve (10) with a pressure equalizing mechanism is provided to permit pressure above and below a valve closure member (24) to equalize prior to the opening of the valve closure member. An actuating key (46) is releasably engageable with a recess (52) in a flow tube (18) that is moveably disposed within a longitudinal bore of the safety valve. An equalizing plug (48) is disposed for reciprocal movement within a plug bore, and is moveable in response to movement of the actuating key (46). To open the valve closure member, the flow tube (18) moves downwardly into engagement with the actuating key (46), thereby carrying the actuating key into engagement with the equalizing plug (8) to shift the equalizing plug to an open or equalizing position. Pressure above and below the valve closure member is equalized through the equalizing plug prior to the opening of the valve closure member by further downward movement of the flow tube (18).
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