Patent ID: 7690866
Filing Date: 2010-04-06
Classification: E02B

Abstract:
1. An offshore production platform based on a seabed, the platform comprising: a deck including legs, the deck being moveably mounted on the legs, each leg including a lower part and a stand at the lower part of the leg operable for bearing on the seabed; a caisson inside each leg, the caisson including a base with a bottom side open and being operable to penetrate with the base first into the seabed to anchor the platform; the caisson being movable along an axis of the leg between a caisson retracted high position and a caisson low position at which the caisson is extended with respect to the stand of the leg and at which the caisson is anchored in the seabed; and a locking device operable for locking the caisson onto the leg in the caisson low position, wherein the locking device at each caisson comprises: a top end, and a plurality of top stops positioned at the top end of the caisson; at least two arms mounted on the top end of the caisson and extending above the caisson; at least two bottom stops located inside of and at the lower part of the leg, each bottom stop being positioned, shaped and operable to cooperate in the caisson low position with a respective top stop of the plurality of top stops; and at least two intermediate stops located inside the leg above the at least two bottom stops and each intermediate stop operable to lock a free end of a respective arm of the at least two arms in the caisson low position.