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8182176 |
Tendon-supported membrane pipe
A pipe comprising a flexible membrane that is disposed over a plurality of spaced-apart tendons is disclosed.
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8157481 |
Method for templateless foundation installation
A method of installing a foundation system for securing the tendons of a TLP to the ocean floor. The foundation system is installed in templateless operations in which a pile is secured to the...
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8087849 |
Battered column tension leg platform
A tension leg platform includes a deck supported on the upper ends of three or more columns interconnected at the lower ends thereof by horizontally disposed connecting members. The columns are...
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8021081 |
Pull-style tensioner system for a top-tensioned riser
A tensioner system for a top-tensioned riser in a floating platform includes a hydro-pneumatic tensioner assembly resiliently mounted to the floating platform, and a riser support conductor...
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7980787 |
Dual pressure tensioner method
A method for tensioning for oil and natural gas floating platforms and floating vessels using a plurality of self contained dual pressure cylinders for adjusting simultaneously low and high...
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7980786 |
Dual pressure tensioner system
A tensioner system is described for oil and natural gas floating platforms and floating vessels having a plurality of self contained dual pressure cylinders for adjusting simultaneously low and...
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7976247 |
Dual pressure cylinder
A self contained dual pressure cylinder for use in tensioner assemblies for oil and natural gas floating vessels. The self contained dual pressure cylinder can have a high pressure outer barrel...
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7976245 |
Mooring
A mooring (10) for connecting an ocean energy capturing device (51) to a seabed (16) is disclosed. The mooring (10) comprises a base (12) adapted for connection to the ocean energy capturing device...
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7914234 |
Method and apparatus for restraining a tendon top connector in reverse loading conditions
A tendon top connector for a moored, floating structure such as a tension leg platform, a tension leg buoy or the like has a bowl-shaped extension on the member which transfers the tension of the...
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7854570 |
Pontoonless tension leg platform
A pontoonless tension leg platform (TLP) has a plurality of buoyant columns connected by an above-water deck support structure. The design eliminates the need for subsea pontoons extending between...
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7766581 |
System, method, and apparatus for independent retention of a locking device on mooring connections
A tendon or riser connector has a separate lock-down device that overrides the connector's ability to unlock if the riser or tendon goes slack. The connector has a lock ring that engages a groove...
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7708498 |
Soft stop for maximum riser tensioner stroke
A riser is connected to subsea well equipment and extends to a vessel. A tubular conductor is mounted stationarily to and around the riser, the conductor passing through an opening in the vessel. A...
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7654327 |
Tensioner assembly
A tensioner assembly for moveably carrying a conductor that communicates from a wellhead to a piece of well access equipment on a rig. The tensioner assembly includes a support frame, at least one...
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7621698 |
Rotating lock ring bottom tendon connector
A tendon bottom connector assembly has a receptacle with a bore having an annular locking profile divided into segments by axially extending slots. The connector has a housing that inserts into and...
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7588393 |
Method for supporting top tension drilling and production risers on a floating vessel
A method for supporting top tension drilling and production risers on a floating vessel using a tensioner assembly above the water line of the vessel. The method can include attaching at least one...
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7575397 |
Floating platform with non-uniformly distributed load and method of construction thereof
The floating platform of the invention is intended for supporting industrial, commercial, cultural, and dwelling structures and is suitable for deployment in shallow as well as in deep waters, The...
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7553106 |
Method for making a floating offshore drilling/producing structure
A method for making a deep draft semi-submersible drilling/production vessel having a center of gravity below its center of buoyancy by constructing a plurality of buoyant individual columns. The...
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7540692 |
System, method, and apparatus for locking down tendon or riser moorings
A tendon or riser connector has a separate lock-down device that overrides the connector's ability to unlock if the riser or tendon goes slack. The locking device has blocks that are radially...
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7462000 |
Battered column tension leg platform
A tension leg platform includes a deck supported on the upper ends of three or more columns interconnected at the lower ends thereof by horizontally disposed pontoons. The columns are battered...
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7452162 |
Method of installation of a tension leg platform and tendons therefor
A method and system for attaching a TLP to its tendons using pull-down lines to rapidly submerge the hull to installation draft while compensating for inherent hull instability during submergence...
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7438504 |
Arrangement for anchoring a floating structure
An arrangement for anchoring a floating structure comprising a mooring boom 120a, b; 650a, b pivotally arranged at either end, wherein each mooring boom at its free end has a bushing 124a, b: 654a,...
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7422394 |
Tendon for tension leg platform
A tendon for mooring a tension leg platform having an uppermost pipe segment with a reduced diameter compared to at least one of the lower pipe segments. The tendon is watertight and sealed from...
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7413384 |
Floating offshore drilling/producing structure
A deep draft semi submersible structure wherein the semi-submersible has a center of gravity below its center of buoyancy and the structure is a floating vessel with at least three vertically...
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7287935 |
Tendon assembly for mooring offshore structure
An offshore system for petroleum production has a buoyant platform. A tendon assembly secures to the platform and extends down to a counterweight located near the lower end. A piling is embedded in...
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7278801 |
Method for deploying floating platform
A method for deploying a floating platform at an offshore wellsite uses pull-down lines to provide stability to the platform while ballasting. The platform is equipped with a number of tension...
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7168889 |
Floating platform having a spoolable tether installed thereon and method for tethering the platform using same
The present invention discloses a process for installing a floating platform to the ocean floor using a spoolable (preferably composite) tether, comprising installing the spooled tether onto the...
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7163356 |
Stepped tendon with sealed bulkheads for offshore platform
A tension leg platform is secured to the sea floor with a plurality of tendons, each of the tendons being in tension due to buoyancy of the platform. The tendons are made up of joints of pipe...
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7156586 |
Wind turbine with floating foundation
A floating foundation for wind turbines is disclosed, where the foundation essentially comprises at least three submerged buoyancy bodies connected to the lower end of the tower of the wind turbine...
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7140807 |
Hybrid composite steel tendon for offshore platform
A tendon for an offshore floating platform has a tubular section formed of joints of steel pipe secured together. The tubular section has an interior sealed from sea water to provide buoyancy. A...
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7104730 |
Achieving hydrostatic stability of a floating structure
A floating platform includes a hull and a deck mounted on the uppermost end of the hull. The platform is anchored to the seabed by a plurality of tendons connected to the hull at the upper ends...
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7101117 |
Minimized wave-zone buoyancy platform
Minimized Wave-zone Buoyancy is a new approach to oil and gas platform design with superior construction and performance characteristics compared to state-of-art off-shore drilling and production...
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7086810 |
Floating structure
The present invention relates to a floating structure to receive maritime production or drilling installations that is provided with means to reduce movement caused by the action of environmental...
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7037044 |
Deck-to-column connection for extendable draft platform
An extendable draft platform, having a deck and buoyancy columns installed in leg wells in the deck for vertical movement from a raised position to a submerged position, includes a connection...
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7033115 |
Temporary floatation stabilization device and method
A temporary stability module and method for marine structures during construction, transportation and installation is taught. The device and method permit the structure, including platforms, deck...
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7008141 |
Collapsible buoyancy device for risers on offshore structures
Expandable and contractible buoyancy modules are assembled to the risers of a deepwater exploration spar or other offshore structure to provide an upwardly directed buoyancy force to offset at...
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6953308 |
Offshore platform stabilizing strakes
An elongated, annular hull of a floating offshore platform includes one or more segmented, helical strakes disposed on an outer peripheral surface of the hull to reduce vortex-induced vibrations...
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6932542 |
Tension leg platform having a lateral mooring system and methods for using and installing same
A lateral mooring system for tendon-based platforms is disclosed, which provides reduced installation and/or operational cost associated with the installation and operation of an extended-base...
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6884003 |
Multi-cellular floating platform with central riser buoy
A semi-submersible floating platform for offshore drilling and/or production of petroleum product from the seabed includes a base having a first moon pool; a plurality of vertical outer buoyancy...
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6854933 |
Vertically restrained centerwell SPAR
In one example embodiment, a floating deep draft caisson vessel for drilling and production is provided. The vessel comprises an outer hull, wherein the outer hull has a hollow centerwell. The...
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6851894 |
Deep water TLP tether system
A tether system include tethers each having an upper section (1) attached to a tension leg platform (TLP) (4), and each upper section has a large diameter so that the upper section (1) is...
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6789981 |
Riser tensioning construction
A vessel includes a riser and/or tendon tensioning construction. A connector, such as an arm or deck structure, is suspended from cables movable relative to cable guides. The connector carries two...
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6718899 |
Method for installing a number of risers or tendons and vessel for carrying out said method
A method of connecting two or more elongate connection members (105) between the seabed and a floating vessel (106) carrying a connector (102) which is suspended from the vessel by at least two...
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6712559 |
Seafloor-surface linking device comprising a stabilizing element
A bottom-to-surface link with at least one underwater pipe having a portion with a substantially constant diameter and one or more floats in a string, the floats constituting cans surrounding the...
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6712560 |
Riser support for floating offshore structure
A floating offshore platform configuration is provided, which decouples pitch, roll, and heave motions from acting on tensioned risers and accommodates the angular displacement induced by floating...
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RE38458 |
Vertical stab tendon bottom connector and method for securing and releasing the same
A bottom connector for the tendon of a tension leg platform uses a latch ring with an outer profile to engage a mating profile in a receptacle on the sea floor. The latch ring moves radially within...
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6682266 |
Tension leg and method for transport, installation and removal of tension legs pipelines and slender bodies
A tendon which is divided into compartments enclosing therein pressurized gas. A method for transporting a fluid containing tubular body or assembly of bodies above a sea/river bed floor and within...
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6666624 |
Floating, modular deepwater platform and method of deployment
A floating platform for use in a body of water comprises an uppermost buoyant and ballastable hull partially submerged in the water without contacting the floor of the body of water and usually...
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6652192 |
Heave suppressed offshore drilling and production platform and method of installation
A heave suppressed, floating offshore drilling and production platform comprises vertical columns, lateral trusses connecting adjacent columns, a deep-submerged horizontal plate supported from the...
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6585455 |
Rocker arm marine tensioning system
A tensioning riser system for supporting marine elements such as risers which extend form a fixed lower end at a subsea base or foundation to a moving, floating superstructure. The tensioning...
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6575665 |
Precast modular marine structure & method of construction
A precast, modular marine structure and method of constructing the same for offshore use, including but not limited to drilling, oil and gas production, and oil storage in a variety of water...
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