A method to manufacture a platform for offshore installation by determining one or more properties selected from a group consisting of a desired length, a cargo tonnage requirement, a heavy lift capacity, total buoyancy, and an operating depth of the platform, and designing a hull section, a first jack up rig, and a second jack up rig based on the determined properties. The first designed jack up rig is joined to a first end of the designed hull section, and the second designed jack up rig is joined to a second end of the designed hull section located opposite the first end.

The present disclosure generally relates to offshore vessels, such as crane barges, retrofitted with jack-up legs, and methods of forming the same. The offshore vessels may be American-made or be otherwise Jones Act compliant.

The present disclosure generally relates to movable offshore platforms for installing wind turbines, and methods of forming the same. The movable offshore platforms are offshore platforms which were previously used in hydrocarbon production, such as jack-up units. The movable offshore platforms may be decommissioned and retrofitted with equipment for installing wind turbines. The movable offshore platforms may be American-made or otherwise Jones Act compliant. Methods of forming the same are also included.

The present disclosure generally relates to jack-up units employing a multi-purpose derrick structure for drilling, plug, abandonment, and decommissioning operations. The multi-purpose derrick structure includes a mast that may be vertically oriented in a first configuration to facilitate drilling, plug, and abandonment procedures, or may be pivotably positioned in a second configuration for decommissioning operations or other procedures. In the pivoting position, the mast functions as a heavy lift crane. One or more selective pivoting structures at the base of the multi-purpose derrick structure, and one or more actuators, facilitate the multiple uses of the multi-purpose derrick structure.

A jack-up platform is described having a horizontal working deck that may be jacked up out of the water by moving its legs to a position wherein they take support on an underwater bottom. The jack-up platform further comprises a mooring system for mooring a floating vessel at a mooring side of the jack-up platform. The mooring system comprises an elongated support means for supporting a hull part of the floating vessel, and guiding means connected to the hull of the jack-up platform at the mooring side. The guiding means are able to rigidly hold the elongated support means in a support position, in which the elongated support means is within reach of the hull part of the floating vessel to be supported when the hull is jacked out of the water and the jack-up platform rests on its legs. A method for mooring a floating vessel using the jack-up platform is also described.

A jackup mobile offshore drilling unit includes a hull and a plurality of jacking legs movable longitudinally with respect to the hull and having features thereon to support the hull above a body of water. A storage tank is disposed inside at least one of the plurality of jacking legs. The unit comprises means for moving the storage tank longitudinally inside the at least one of the plurality of jacking legs.

A jack-up vessel has a buoyant hull, a plurality of jack-up legs including leg chords having racks, and jacking assemblies to relatively move the associated leg chord relatively to the buoyant hull vertically. The jacking assemblies include actuators and a pinion group, including a plurality of pinions arranged vertically above each other. Jacking assemblies include a sensor system for sensing the load distribution associated with a pinion group. The jack-up vessel includes a control system configured for receiving information about an intended use and/or future environmental conditions and determining a pre-operation load distribution over the pinions in the pinion group, in which pre-operation load distribution the loads within this pinion group are unequally distributed, such that during the intended use and/or during the future environmental conditions the loads within this pinion group are equally distributed.

Techniques and devices to assist an offshore unit in going on location and coming off location. A device may include an interface configured to receive a signal indicative of motions of an offshore unit. The device may also include a memory configured to store a set of values corresponding to acceptable motions of the offshore unit, as well as a processor configured to determine if a measured motion of the offshore unit exceeds at least one value of the set of values and generate an indication that going on location by the offshore unit can be undertaken when the processor determines that the measured motion of the offshore unit is less than or equal to the at least one value.

A system is disclosed including but not limited to a jack up processor in data communication with each for dynamically balancing loads in real time on a plurality of legs supporting a jack up rig platform having a plurality of gear box motors on the plurality of legs. A processor reads data from sensors on gear box motors on the legs and selects a stored torque profile from a computer readable medium based on the load data from the sensors; and sends the torque profile to the plurality of gearboxes. A computer readable medium and neural network are disclosed for dynamically balancing loads on the plurality of legs in real time.

Systems and methods for mobile offshore carbon capture and sequestration operations. One system includes a first installation featuring a direct air carbon dioxide capture (DAC) system, carbon dioxide dehydration, carbon dioxide compression and a second installation featuring carbon dioxide injection facilities to inject carbon dioxide into an underground reservoir or other suitable subsurface formation.