Hydraulically set liner hanger

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/10 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2424719

A liner hanger, in either a non-rotating or rotating format, has a large hanging capacity due to a one or more axially spaced sets of circumferentially spaced slips housed in openings in a slip housing, the slip housing being moveable axially relative to a mandrel for actuating the slips over cams supported by the mandrel. One or more sets of sets of slips are spaced axially along the slip housing. An annular space is formed between the mandrel and slip housing for maximizing fluid bypass through the annular space. Bypass is further improved by profiling the slip housing. In the rotating version, a separate sleeve is positioned between the mandrel and the slip housing for supporting the cams and the mandrel is supported on the cam sleeve through an upper bearing which permits the mandrel to rotate on the cam sleeve when the slips are set.

Suspension de colonne perdue, du type rotatif ou non rotatif, muni d'une grande capacité de suspension grâce à une ou plusieurs séries espacées de glissières espacées sur le plan axial, dans des ouvertures dans un logement de glissières, le logement en question pouvant être déplacé sur le plan axial par rapport à un mandrin pour déplacer les glissières sur des cames supportées par le mandrin. Une ou plusieurs séries de glissières sont espacées sur le plan axial le long de l'enveloppe des glissières. Un espace annulaire est formé entre le mandrin et le logement des glissières pour maximiser le passage fluide à travers l'espace annulaire. Le passage est aussi amélioré en profilant le logement des glissières. Dans la version rotative, un manchon séparé est placé entre le mandrin et le logement des glissières pour supporter les cames et le mandrin est supporté sur la chemise de came par le biais d'un roulement supérieur qui permet la rotation du mandrin sur la chemise de came lorsque les glissières sont mises en place.

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