Alsthom-atlantique

Ateliers Et Chantiers De Bretagne - A.c.b.

Alsthom-atlantique and Plastibenne

Jean-Pierre Manesse

Daniel Fleury

Xavier M Peyre

Jacques Angibaud

Andre Bourgeois

Nacelle

A device for positioning and applying tension to a set of rods (5) for holding a partially submerged platform wherein the device includes a metal frame, (12, 13A, 13B, 13C, 13D, 14), means for vertically moving said frame relative to the platform, at least one jack (21 22) of a first type which has a cylinder and a rod, at least one jack (31,32) of a second type which has a cylinder and a rod, the cylinders of the rods being fast to said frame and being disposed in such a way that the rods move vertically, the rod of the jack of the first type being fast to a plate (25) which is provided firstly with an orifice for the rod of the second type of jack to pass through and secondly with means of fixing to the end of the set of rods, the rod of the second type of jack having a stop (31, 32) at its end, the rods of the jacks of both types being of unequal length and being chosen in such a way that the jack of the second type drives the plate only in the platform immersion step. Application to oil well drilling.

Device for positioning and applying tension to a set of rods for holding

This connection means comprises a male connector (1) with a circular groove (5) and a female connector comprising a body (2), a cap (3) and a sleeve (4). The cap (3) hangs from the bottom end of body 2 within which it is able to partly slide. The cap has a bearing surface (7) bearing on the male connector (1) and its bottom part (9) covers the male connector. This bottom part is provided with a circular series of openings (10) each equipped with a finger (11) operable to slide radially. These fingers cooperate with windows (27) in a conical wall (26) of the sleeve (4). Connection is made by gravity, by body 2 pushing down on sleeve 4, which slides downward causing the fingers (11) to slide radially inward. Disconnection is accomplished by sending oil pressure through purposely provided channels (35, 33, 30) into a chamber (20), causing the sleeve (4) to slide up and the fingers (11) to retract. The invention finds particular application in the anchoring of tethers for buoyant marine platforms anchored by means of vertical tethers.

Mechanical connection means

Growing community of inventors

Basse Goulaine, France

Jean-Pierre Manesse