Abstract: Various aspects include devices, systems, and methods for securing an anchoring element to a seafloor. The methods may use a subsea anchorage installation system that may include a subsea grout supply assembly. The subsea grout supply assembly may include a variable volume grout storage chamber, a paddle, and a subsea grout pump. The variable volume grout storage chamber may be configured to transport dry grout to a seafloor. The variable volume grout storage chamber may include a water injection port configured to receive water for mixing with the dry grout on the seafloor. The variable volume grout storage chamber may also be configured to expand from a collapsed configuration as water is injected.

Abstract: Various embodiments include heat exchangers and methods of making heat exchangers from a series of stacked plates each made of two foil sheets bonded together in bonding locations forming fluid flow passages between the foil sheets in regions where the foil sheets are not bonded. An inlet port and an outlet port located at opposite ends of the planar extent of the two foil sheets extend through the foil sheets perpendicular to the planar extent of the foil sheets. The inlet and outlet ports provide access for a first fluid to flow into or out of the internal plate passages formed between the two foil sheets. Interstitial channels are formed between the series of plates and configured to allow the flow of a second fluid between the series of plates, allowing heat to be transferred between the two fluids while isolating the two fluids from one another.

Abstract: An underwater cable burial mechanism including a nozzle disposed in front of a plow blade wherein the nozzle is configured to spray a jet of water onto the sea floor in an intended path of the plow blade to bury a cable in the sea floor. In an embodiment, the underwater cable burial mechanism may include two or more straight flow nozzles disposed in front of the plow blade at various angles and heights. In an embodiment, the underwater cable burial mechanism may be a component of an array burial vehicle, the array burial vehicle further including a pump to provide water to the nozzle(s), cable pack to hold a cable array, at least one ski configured to ride along the sea floor, and at least one thruster configured to propel the array burial vehicle along the sea floor.

Abstract: The various embodiments provide a power-generating plant including a dynamic floating platform that is configured to efficiently produce 100 MW of power using a honeycomb configuration of mist lift cells. The mist lift columns are configured to optimize performance and to adjust configurations of components to compensate for changes in orientation of the platform and temperature of sea water in order to manage power output of the plant.

Abstract: A pipe attachment assembly for attaching a pipe to another structure so stresses are reduced within the assembly includes a sleeve positioned outside the pipe which is composed of a material stronger than the pipe material, and an elastomeric bonding material which fills a gap between the pipe and the sleeve. The elastomeric bonding material transfers forces which are externally imposed on the pipe to the sleeve. This reduces bending, compression, tension, or torsion of the pipe in response to external forces, which in turn reduces the risk of a pipe failure at or near the termination or a breach where the pipe forms a joint with other pipes or containers. Various configurations may further improve the transfer of shearing stresses from the pipe to the sleeve, for example varying the width and/or the shear modulus of the elastomeric bonding material along the length of the pipe.

Abstract: An underwater cable burial mechanism including a nozzle disposed in front of a plow blade wherein the nozzle is configured to spray a jet of water onto the sea floor in an intended path of the plow blade to bury a cable in the sea floor. In an embodiment, the underwater cable burial mechanism may include two or more straight flow nozzles disposed in front of the plow blade at various angles and heights. In an embodiment, the underwater cable burial mechanism may be a component of an array burial vehicle, the array burial vehicle further including a pump to provide water to the nozzle(s), cable pack to hold a cable array, at least one ski configured to ride along the sea floor, and at least one thruster configured to propel the array burial vehicle along the sea floor.

Abstract: The various embodiments provide a power-generating plant including a dynamic floating platform that is configured to efficiently produce 100 MW of power using a honeycomb configuration of mist lift cells. The mist lift columns are configured to optimize performance and to adjust configurations of components to compensate for changes in orientation of the platform and temperature of sea water in order to manage power output of the plant.

Abstract: A pipe attachment assembly for attaching a pipe to another structure so stresses are reduced within the assembly includes a sleeve positioned either within or outside the pipe which is composed of a material stronger than the pipe material, and an elastomeric bonding material which fills a gap between the pipe and the sleeve. The elastomeric bonding material transfers forces which are externally imposed on the pipe to the sleeve. This reduces bending, compression, tension, or torsion of the pipe in response to external forces, which in turn reduces the risk of a pipe failure at or near the termination or a breach where the pipe forms a joint with other pipes or containers. Various configurations may further improve the transfer of shearing stresses from the pipe to the sleeve, for example varying the width and/or the shear modulus of the elastomeric bonding material along the length of the pipe.