Abstract: Improvements in buoyancy structures independently comprising each ofA radiating, circumferentially extending buoyancy cell network encircling an offshore jacket leg, andA double-walled buoyancy chamber wall fabricated from a shell and overlapping pipe segments bonded thereto.An offshore platform jacket assembly is disclosed in which a plurality of jacket legs are anchored by piling members to the bed of a body of water. A buoyancy unit is disposed at a lower portion of the jacket in association with at least one of the jaket legs. Each buoyancy unit comprises a chamber disposed around its respective leg. Each chamber is divided into a plurality of circumferentially displaced, radiating cells and these cells are disposed inwardly of a periphery defined by a series of piling guides spaced around the leg. A plurality of generally upright divider fins extend radially outwardly from the leg to divide the chamber into the radiating cells which are arranged about the leg for the reception of a buoyant medium.

Abstract: Disclosed is an apparatus for cushioning and absorbing force between relatively moving bodies and for dissipating the impact energy, preferably in a marine environment. The apparatus is securable to a structure in a marine environment and typically cushions the impact between a marine means (i.e., barge, boat, etc.) and that structure. The apparatus comprises an upright frame, laterally spaced apart upper shock mounts securing the frame to the structure. Each of the shock mounts includes a shear-type, shock-absorbing, resiliently-deformable member disposed intermediate the upright frame and the structure to which it is secured. The resiliently-deformable members of the upper shock mounts are disposed in an orientation in which they provide both compressive and shear resistance to horizontal loading on the frame.

Abstract: Improvements in buoyancy structures independently comprising each ofA radiating, circumferentially extending buoyancy cell network encircling an offshore jacket leg, andA double-walled buoyancy chamber wall fabricated from a shell and overlapping pipe segments bonded thereto.An offshore platform jacket assembly is disclosed in which a plurality of jacket legs are anchored by piling members to the bed of a body of water. A buoyancy unit is disposed at a lower portion of the jacket in association with at least one of the jacket legs. Each buoyancy unit comprises a chamber disposed around its respective leg. Each chamber is divided into a plurality of circumferentially displaced, radiating cells and these cells are disposed inwardly of a periphery defined by a series of piling guides spaced around the leg. A plurality of generally upright divider fins extend radially outwardly from the leg to divide the chamber into the radiating cells which are arranged about the leg for the reception of a buoyant medium.