E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 34/06 (2006.01) E21B 21/10 (2006.01) E21B 23/00 (2006.01) E21B 34/10 (2006.01) F16K 31/122 (2006.01)
Patent
CA 2202726
A circulating valve and associated methods of servicing a well provide reliable operation, economical manufacture, and convenient maintenance in the circulating valve which is responsive to flow of fluid therethrough, and increased versatility in well servicing operations utilizing the valve. In a preferred embodiment, a circulating valve includes an upper case having a reverse circulating port formed radially therethrough, a circulating case having a circulating port formed radially therethrough, a lower adapter, a mandrel having a flow port formed radially therethrough, a biasing member, a ratchet, an inner sleeve, and a one-way flow restrictor carried on the mandrel. In an open configuration, fluid communication is permitted between the flow and circulating ports, and between the reverse circulating port and the flow restrictor. In a closed configuration, fluid communication is not permitted radially through the valve. A predetermined pressure differential across the mandrel is utilized to configure the valve in its open and closed configurations.
La vanne de circulation et les méthodes d'entretien et de réparation d'un puits permettent un fonctionnement fiable, une fabrication économique et une maintenance facile. La vanne de circulation est sensible au débit de fluide la traversant et elle permet une polyvalence accrue dans les travaux d'entretien et de réparation. Dans une application privilégiée, la vanne de circulation inclut un carter supérieur comportant un orifice de circulation inverse formé radialement dans le carter, un carter de circulation ayant un orifice d'écoulement formé radialement dans ce même carter, un adaptateur inférieur, un mandrin doté d'un orifice formé radialement dans celui-ci, un élément d'inclinaison, un cliquet, un manchon intérieur, et un limiteur de débit unidirectionnel monté sur le mandrin. En position ouverte, la circulation du fluide est possible entre les orifices d'écoulement et de circulation, et entre l'orifice de circulation inverse et le limiteur de débit. En position fermée, la circulation du fluide n'est pas possible radialement à travers la vanne. Une différence de pression prédéterminée dans le mandrin est utilisée pour mettre la vanne en position ouverte ou fermée.
Ringgenberg Paul D.
Skinner Neal G.
Halliburton Energy Services Inc.
Swabey Ogilvy Renault
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