Abstract: A method of joining two portions of an underwater pipeline for conducting fluid and/or gas on the bed of a body of water, the method including the steps of: joining a telescopic sleeve, having a first coupling head, to a first end of a first pipeline portion above the body of water; positioning the first end, the telescopic sleeve, and the first coupling head in a first given position on the bed of the body of water; joining a second coupling head to a second end of a second pipeline portion above the body of water; positioning the second end and the second coupling head in a second given position, close to the first coupling head, below the body of water; and connecting the first and second coupling head hermetically below the body of water.

Abstract: A method of joining two portions of an underwater pipeline for conducting fluid and/or gas on the bed of a body of water, the method including the steps of: joining a telescopic sleeve, having a first coupling head, to a first end of a first pipeline portion above the body of water; positioning the first end, the telescopic sleeve, and the first coupling head in a first given position on the bed of the body of water; joining a second coupling head to a second end of a second pipeline portion above the body of water; positioning the second end and the second coupling head in a second given position, close to the first coupling head, below the body of water; and connecting the first and second coupling head hermetically below the body of water.

Abstract: A reversible mechanical coupling to be clamped in a suitable seat by means of clamping levers and wedges, in which the clamping levers are pivoted to arms rigid with said wedges by two lateral pivots which are inserted through vertical slots in said arms and are retained at the lower end of said slots by the narrow but forcible mouth of springs of tuning-fork shape mounted in correspondence with said slots, said clamping levers being also provided with laterally projecting pegs which are inserted in suitably shaped guides provided in protection casins interposed between the clamping levers and fixed to the coupling body.

Abstract: A flexible structure of controlled yieldability for use as a hydrocarbon drilling and production platform in deep seas, or as a mooring point for oil tankers, constituted by a foundation base assembly, a vertical cylindrical tubular element placed under tension by a buoyancy chamber disposed at its top in proximity to the water surface, and an overlying lattice which at its top supports the plant platform.The tubular element is connected at its lower end to the base and at its upper end to the buoyancy chamber by means of suitable profiled tapered terminal elements able to withstand the bending loads which are generated at said connections.The entire structure is constituted by four separate pieces, namely the foundation base assembly with the lower terminal element, the lower half of the cylindrical tubular element, the upper half thereof, and the upper buoyancy chamber which is connected at one end to the upper terminal connection element and at the other end to the top lattice.

Abstract: A reversible mechanical coupling for tensional anchorages includes a cylindrical body having a widened portion of conical shape capable of causing a set of clamping levers to be radially expanded by pivoting around a lower linking ring controlled to move coaxially with the cylindrical body by a first set of oleodynamic cylinders supported by the cylindrical body. The clamping levers are kept in contact with the body by springs, and are in mechanical interference, in their expanded position, with a conical surface provided in the seat for the coupling. A set of vertical guides is for provided on the upper portion of the cylindrical body for guiding a set of wedges pivoting around an upper linking ring controlled to move coaxially with the cylindrical body by a second set of oleodynamic cylinders supported by the body.

Abstract: A system for mooring tankers to an emergent fixed structure, constituted by an articulated connection structure using an equalizer hinged to the tanker deck by hinges able to isolate said articulated structure from the tanker rolling motion.

Abstract: An apparatus for reducing environmental forces on a mooring system for tanker ships, wherein a fixed structure comprising a hinged arm rotatably movable with respect to the mooring system is provided with a rocker assembly which is pivotally connected to said arm and universally connected via lateral connecting ties to ballast chambers.

Abstract: A monolithic structure for off-shore mooring composed of a broadened foundation (2) and an emerging vertical structure (1) having a very slender character and a flexural resistance modulus decreasing from the bottom towards the surface. This structure has a buoyancy chamber (15) placed in a submerged position and close to the top end.

Abstract: A floating platform used in exploiting subsea oil shoals and a method for installing the platform which comprises a platform structure and an array of vertical tubular anchoring lines connected to the uprights of the platform and to anchoring blocks lying on the sea bottom, the tube sections which form the anchoring lines being connected together in sequential order by welding to make up a solid entity.