Walking substructure device

E - Fixed Constructions – 21 – B

Patent

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E21B 7/02 (2006.01) B62D 57/00 (2006.01)

Patent

CA 2243465

A walking substructure device having a drilling rig substructure. A plurality of lifting jacks is provided, each lifting jack having an upper end and a lower end, the upper end connected to the drilling rig substructure. A plurality of roller assemblies is provided, each roller assembly connected to the lower end of one of the jacks, each roller assembly pivotal radially about an axis of the lifting jack. A plurality of jack pads is provided, with each jack pad having a center beam wherein one of the roller assemblies engages the center beam and rolls thereon. A push-pull mechanism extends between each jack pad and each roller assembly in order to move the shoe assemblies in relation to the drilling substructure.

Dispositif de sous-structure mobile comportant une sous-structure d'installation de forage. Plusieurs vérins de levage y sont intallés, et chaque vérin de levage possède une extrémité inférieure et une extrémité supérieure; l'extrémité supérieure étant reliée à la sous-structure de l'installation de forage. Le dispositif compte plusieurs roulements, chaque roulement est relié à l'extrémité inférieure d'un des vérins, chaque roulement pivote radialement sur un axe du vérin de levage. Le dispositif compte plusieurs appuis de vérin de levage, et chaque appui de vérin de levage possède une poutrelle centrale dans laquelle un des rouleaux engage la poutrelle centrale et roule sur celle-ci. Un mécanisme poussée-traction s'étend entre chaque appui de vérin et les rouleaux pour déplacer les sabots par rapport à la sous-structure de forage.

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