Sub-surface deployment valve

Details Sub-surface deployment valve Sub-surface deployment valve

E - Fixed Constructions

21

B

E21B 34/06 (2006.01) E21B 21/10 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2621053

A sub surface deployment valve which is particularly suitable for use in underbalanced drilling operations which can be installed through an existing tubular string comprises a radially expandable body (1) having an internal bore and a valve element (2) capable of closing off the internal bore. The deployment valve can be installed by passing the valve through the existing tubular and then radially expanding the radially expandable body of the deployment valve to form a connection resulting from the interference between the external surface of the deployment valve and the tubular string.

L'invention concerne une vanne de déploiement de subsurface particulièrement appropriée pour être utilisée dans des opérations de forage en sous-pression et pouvant être installée à travers un train tubulaire existant. Cette vanne comprend un corps expansible radialement (1) pourvu d'un trou interne et un élément de vanne (22) pouvant fermer le trou interne. Ladite vanne de déploiement peut être installée par acheminement de la vanne à travers le train tubulaire existant et, puis, par expansion radiale dudit corps de la vanne de déploiement de manière à former un raccordement provenant du contact entre la surface externe de ladite vanne et le train tubulaire.

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