A subsea storage tank for the storage of bulk fluids is adapted for being set on the sea floor, and is adapted for supplying to local subsea oil and gas production facilities a wide variety of production support fluids. The subsea storage tank includes an inner and outer shell, the shells being adapted so that a barrier fluid can be inserted into and between the shells. An interior barrier separates the interior stored fluid from sea water that is free to enter into the tank, on the opposite side of the barrier, to compensate to the varying volume of stored fluid. An identical tandem barrier is formed nearly identical to the first barrier, and is formed and positioned so that the two barriers act together, and so that the space between them can contain fluid as well, and acts like a bladder.

A subsea storage tank for the storage of bulk fluids is adapted for being set on the sea floor, and is adapted for supplying to local subsea oil and gas production facilities a wide variety of production support fluids. The subsea storage tank includes an inner and outer shell, the shells being adapted so that a barrier fluid can be inserted into and between the shells. An interior barrier separates the interior stored fluid from sea water that is free to enter into the tank, on the opposite side of the barrier, to compensate to the varying volume of stored fluid. An identical tandem barrier is formed nearly identical to the first barrier, and is formed and positioned so that the two barriers act together, and so that the space between them can contain fluid as well, and acts like a bladder.

An anchoring apparatus for anchoring objects underground against upward forces includes a pair of bases, each of which comprises a container for holding weights. The object to be anchored may be positioned over the pair of bases such that the bases extend outwardly from the object. The bases are attachable to the load via mounting straps, threaded fasteners, or the like. The bases push against soil when upward forces act on the object, and the weights further operate to secure the object against the upward force.

An anchoring apparatus for anchoring objects underground against upward forces includes a pair of bases, each of which comprises a container for holding weights. The object to be anchored may be positioned over the pair of bases such that the bases extend outwardly from the object. The bases are attachable to the load via mounting straps, threaded fasteners, or the like. The bases push against soil when upward forces act on the object, and the weights further operate to secure the object against the upward force.

A subsea material delivery structure, including at least one material storage tank, wherein the material storage tank includes a rigid outer container, at least one pressure balanced inner flexible container. A pinch prevention device may be disposed within the at least one inner flexible container to prevent premature closing of a fluid egress pathway.

A subsea material delivery structure, including at least one material storage tank, wherein the material storage tank includes a rigid outer container, at least one pressure balanced inner flexible container. A pinch prevention device may be disposed within the at least one inner flexible container to prevent premature closing of a fluid egress pathway.

A system for storing air at high pressure underground or underwater includes a plurality of arrays of air tanks, each tank configured to store compressed air at a pressure of at least 40 bar. A piping system connects between an outlet of each air tank, the piping system further including at least one central port for delivering compressed air to and from a respective array. A storage receptacle surrounds the arrays and piping system, protecting the arrays and piping system from an external environment, and thermally insulating the arrays and piping system. A liquid bath is arranged within the storage receptacle. A heat exchanger is configured to maintain a temperature of the liquid bath substantially constant. The storage receptacle may be comprised of plastic pieces welded together in a modular fashion. Each piece may be a cylindrical tube configured to receive therein one or more of the arrays.

A system for storing air at high pressure underground or underwater includes a plurality of arrays of air tanks, each tank configured to store compressed air at a pressure of at least 40 bar. A piping system connects between an outlet of each air tank, the piping system further including at least one central port for delivering compressed air to and from a respective array. A storage receptacle surrounds the arrays and piping system, protecting the arrays and piping system from an external environment, and thermally insulating the arrays and piping system. A liquid bath is arranged within the storage receptacle. A heat exchanger is configured to maintain a temperature of the liquid bath substantially constant. The storage receptacle may be comprised of plastic pieces welded together in a modular fashion. Each piece may be a cylindrical tube configured to receive therein one or more of the arrays.