Jack-up platform locking apparatus

E - Fixed Constructions – 02 – B

Patent

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Details

E02B 17/08 (2006.01) B66F 1/04 (2006.01) B66F 3/02 (2006.01) B66F 7/12 (2006.01)

Patent

CA 2285049

A locking mechanism (28) is disclosed for use on the legs (14) of a jack-up offshore platform (10). Each chord (18) of the legs (14) includes a rack (22) cooperating with pinions (26) used in raising and lowering the legs. The locking mechanism (28) includes a rigid frame attached to the hull (12) of the platform (10) and housing (36) and a plurality of vertically aligned toothed chock segments (30, 32, 38) to engage the teeth (24) of the rack (22) on a leg (14). The chock segments have upper and lower inclined surfaces cooperating with upper and lower movable wedges (48, 52) for supporting the chock segments (30, 32, 38). Subsequent engagement and retention of the supporting wedges (48, 52) securely locks the chock segments (30, 32, 38) into mating engagement with the rack teeth (24), to thereby lock the platform legs (14) in place.

Mécanisme de verrouillage (28) conçu pour être mis en application sur les pieds d'une plate-forme élévatrice (10) de forage en mer. Chaque membrure (18) des pieds (14) comprend une crémaillère (22) coopérant avec des pignons (26) servant à élever et à abaisser les pieds. Ce mécanisme de verrouillage (28) comprend un cadre rigide fixé à la coque (12) de la plate-forme (10) et logeant (36) une pluralité de segments élastiques dentés (30, 32, 38) alignés verticalement afin de venir en contact avec les dents (24) de la crémaillère (22) sur un pied (14). Ces segments élastiques présentent des surfaces inclinées supérieures et inférieures coopérant avec des coins mobiles (48, 52) supérieurs et inférieurs servant à supporter lesdits segments (30, 32, 38). Le contact et la retenue consécutifs des coins de support (48, 52) verrouillent solidement les segments élastiques (30, 32, 38) afin qu'ils s'accouplent aux dents de la crémaillère, ce qui permet de verrouiller les pieds (14) de la plate-forme en position.

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