Technip Geoproduction

Jean-Claude Naudin

Pierre-Armand Thomas

Michel Ningler

The process for assembling long sections (11) of booms of support legs of an oil platform comprises machining an inclined flat surface (15) on the whole of the length of each main face of a rectangular plate (12), machining a groove behind each flat surface (15), machining an inclined chamfer on longitudinal edges of a stiffener (13), placing a stiffener (13) on each main face of the rectangular plate (12), welding each stiffener (13) to the rectangular plate (12), under a vacuum from the exterior by means of an electron beam, in the region of the chamfers and the flat surfaces so as to produce a section (11), and heat treating the section (11).

Process for assembling long sections of booms of support legs of an oil

The locking device for a self-raising oil platform comprising a shell (1) mounted to be movable along legs (2) by means of raising mechanisms comprising output gear pinions cooperative with racks (3) mounted on at least a part of the length of the legs (2), comprises a toothed member (6) forming a counter-rack (6a) mounted on the shell of the platform, means (7) for shifting the toothed member (6) transversely of the direction of the rack with which the device is associated for engaging the teeth of the toothed member in the teeth of the rack (3) or for disengaging them from the teeth of the rack, clamping plates (13) connected to the toothed member and clamping counter-plates (15) connected to the platform, and means (20) for clamping the plates and counter-plates together so as to lock the toothed member (6) in position in the rack.

Growing community of inventors

Paris, France

Jean-Claude Naudin