Abstract:
The invention relates to a deep water storage facility formed primarily of concrete, for holding a liquid such as crude oil having a lesser density than that of the surrounding water. The facility includes a floatable base which is supportably fastened to a storage tank. The latter includes a support foundation having an upstanding continuous side wall defining an enclosure. A canopy fastened to the upper rim of said foundation wall thereby defines a substantially closed storage compartment. Said canopy is formed of reinforced concrete and assumes an inwardly contoured or concave shape whereby to withstand compressive stresses induced by the buoying action of stored crude oil.
Abstract:
The invention relates to a method and the apparatus therefor for the pile anchoring of a structure in a relatively shallow or underconsolidated substratum. The method includes the initial introduction of an anchoring pile to a desired depth into the normally incompetent substratum. A series of longitudinally spaced peripheral projections are then formed in the substratum adjacent the pile external wall, at discrete intervals to define an irregular holding surface on the otherwise uniform sided pile. The annular projections comprise a precipitated mass of a polymerized methacrylate that has been introduced as a liquid through the pile, dispersed into solution with a solvent. Cavities in which the projections are built, are formed by the pressurized injection of an aqueous fluid whereby to displace and wash away substratum material in a desired pattern.
Abstract:
A fixedly positioned marine platform held at the ocean floor by piles and the like, having a relatively flat concrete apron disposed about the platform lower end and also supported on the ocean floor. The apron functions to stabilize the platform against lateral forces caused by water and wave motion, and also avoids scouring which would otherwise occur about the platform legs and piles due to movement of water along the ocean floor. The apron further lowers the center of gravity of the structure and improves its resistance to vibrations and resonance effects due to wave motion.
Abstract:
The invention relates to an underwater storage facility particularly adapted for holding a hydrocarbon liquid having a specific gravity less than the specific gravity of water. The facility includes a liquid storage tank fixedly positioned beneath the water''s surface usually at the ocean floor. A network of conductors communicates the storage tank with one or more offshore wells whose production is delivered to the tank. A discharge conduit communicated with said tank, when in operating position extends to the water''s surface. When in a non-operating position, the conduit is coiled into a compact bundle at the tank whereby to be beyond the reach of floating vessels, and yet not subject to abrasive wear at the ocean''s floor.