Winch assembly

Details Winch assembly Winch assembly

E - Fixed Constructions

21

B

E21B 19/00 (2006.01) E21B 19/08 (2006.01) E21B 33/076 (2006.01)

Patent

CA 2694606

A winch assembly (30) comprises a winch chamber (32) defined within a housing (31) which includes an orifice to permit fluid communication with a wellbore. A winch drum (34) which supports a spoolable medium (36), such as wireline, is rotatably mounted within the winch chamber (32). A cavity (50) containing a fluid, such as lubrication oil, is defined within the housing (31) and a sealing arrangement is provided between the winch chamber (32) and the cavity (50). The winch assembly (30) also includes a pressure compensator (62) adapted to maintain the cavity (50) at least at the same pressure as the winch chamber (32).

L'invention porte sur un système de treuil (30) comprenant une chambre de treuil (32) placée dans un logement (31) présentant un orifice de communication de fluide avec un forage. Le tambour du treuil (34), qui porte un élément enroulable (36) tel qu'un câble, est monté tournant dans la chambre du treuil (32). Une cavité (50) contenant un fluide tel que de l'huile de lubrification est située dans le logement (31) tandis qu'un joint étanche sépare la chambre du treuil (32) de la cavité (50). Le système de treuil (30) comporte en outre un compensateur de pression (62) maintenant la cavité (50) sous une pression au moins égale à celle de la chambre du treuil (32).

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