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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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7527450 |
Selectably operable field mateable pin assembly
The present invention relates to pins that may be selectably operated to engage and disengage socket bores in the assembly and disassembly of large structures, such as floating offshore platforms...
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7503728 |
Stabilized floating support
The support ( 1 ) includes a working deck ( 2 ) and floatation members ( 3 ) supporting this deck ( 2 ). According to the invention, the spacing between the vertical axes (Z) passing through the...
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7299760 |
Floating LNG import terminal and method for docking
A floating terminal for offloading an LNG carrier vessel in the sea. The floating terminal of open frame construction is moored toward its front end with a rotatable mooring arrangement so that the...
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7293939 |
Inclined leg floating production platform with a damper plate
A floating moored oilfield production structure for deepwater application. An apparatus and a method for the construction and installation of floating oilfield production structures, wherein the...
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7270071 |
Deep draft semisubmersible movable offshore structure
The present invention is a deep draft partially submersible and buoyant floating vessel comprised of at least three independent vertical columns. The columns have an upper column with an upper...
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7219615 |
Extended semi-submersible vessel (ESEMI)
A semi-submersible vessel has a pair of vertically spaced pontoons with varied buoyancy. The lower pontoon is retained in a close vertical proximity to the upper pontoon when the vessel is in...
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7131388 |
Lift boat
An improved lift boat includes a hull, a plurality of legs (preferably three), a plurality of pads, one pad attached to each leg, and a jacking mechanism for moving each upward and downward....
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7117810 |
Platform structure
The invention relates to a floating platform ( 1 ) for offshore drilling or production of hydrocarbons, comprising a topsides ( 2 ) and a substructure ( 3 ) having a lower pontoon ( 4 ) and columns...
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7070468 |
Multi-hull watercraft with amidships-mounted propellers
An efficient double-ended watercraft is disclosed that comprises four low-Froude number hulls: two forward, two aft, two on the port side, and two on the starboard. Each hull comprises an...
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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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7011472 |
Semi-submersible offshore vessel
A semi-submersible offshore vessel including a rectangular ring-pontoon having a first transverse pontoon section at a first end of the vessel and a parallel second transverse pontoon section at a...
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7008140 |
Buoyant leg structure with added tubular members for supporting a deep water platform
A deep water support platform, suitable for use as a hydrocarbon exploration or production facility in very deep waters of 10,000 ft or more is presented. The platform is attached to the floor of...
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7001108 |
Mat supported offshore structure
A bottom-supported jack-up rig has a hollow ring mat with a central opening for accommodating a lower portion of a hull nested therein when the rig is in transit. The ring mat has a predetermined...
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6997132 |
Semi-submersible offshore vessel and methods for positioning operation modules on said vessel
A semi-submersible offshore vessel has a substantially ring-shaped lower pontoon, starboard and port forward columns extending upwards from the lower pontoon, and starboard and port aft columns...
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6935810 |
Semi-submersible multicolumn floating offshore platform
A semi-submersible, multicolumn, deep draft, floating offshore oil and gas drilling and production platform comprises a floating hull having an adjustably buoyant base, a plurality of columns...
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6910438 |
Oscillation suppression and control system for a floating platform
In accordance with the present invention, an oscillation suppression system is provided to inhibit vertical and rotational resonance of a floating platform. The oscillation suppression system...
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6899492 |
Jacket frame floating structures with buoyancy capsules
Jacket frame floating structures comprise one or more elongate vertical support columns formed of an open cross-braced jacket formwork of tubular members interconnected together and at least one...
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6854411 |
Semi-submersible offshore platform and methods for positioning operation modules on said platform
A semi-submersible offshore platform ( 1 ) comprising:
a substantially ring-shaped lower pontoon ( 2 ); at least three columns ( 4 ) extending upwardly from said lower pontoon ( 2 ), and an...
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6830413 |
Ballast system for tension leg platform
An apparatus and method for ballasting and de-ballasting a vessel having a hull with a plurality of watertight ballast compartments wherein each ballast compartment has an individual pump caisson...
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6817309 |
Cellular spar apparatus and method
A floating hull for a spar-type offshore oil and gas drilling and production platform comprises a plurality of parallel tubular cells that are subdivided into compartments having a buoyancy...
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6786678 |
Apparatus for guiding the legs of a lift boat
An apparatus for guiding the legs of a lift boat. Roller assemblies are used to guide the legs. The rollers may be placed at any location or in any number either vertically or around the leg to...
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6761124 |
Column-stabilized floating structures with truss pontoons
Column-stabilized floating structures having a deck and a plurality of vertical buoyant caissons bridged together in distantly spaced relation by a plurality of open frame horizontal truss pontoon...
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6718903 |
Life boat
An improved lift boat includes a hull, a plurality of legs (preferably three), a plurality of pads, one pad attached to each leg, and a jacking mechanism for moving each upward and downward....
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6718901 |
Offshore deployment of extendable draft platforms
Deploying an offshore oil and gas production platform comprises placing a buoyant equipment deck on a buoyant pontoon so that elongated legs on the pontoon, each comprising a buoyant float, extend...
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6705802 |
Temporary support for offshore drilling platform
A support device is used to facilitate maintenance of a jacking system of a self-elevating drilling or maintenance platform having a plurality of legs supporting the platform in an operating...
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6701861 |
Semi-submersible floating production facility
A semi-submersible floating production vessel which has a ring pontoon. Three main columns extend upwardly from corners of the pontoon and three secondary, minor columns. extend upwardly from...
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6698375 |
Small waterplane area multihull (SWAMH) vessel
A Small Waterplane Area MultiHull non-motorized vessel having an upper hull platform located above the design water line of the vessel which is maintained above the surface of a body of water by at...
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6682265 |
Method of establishing and/or operating a bore well in a seabed and a drilling vessel for use in connection therewith
A bore well in a seabed ( 27 ) may be established and/or operated by a drilling barge ( 10 ). The barge may be pulled onto a larger vessel ( 11 ) and transported to a drilling site. Alternatively,...
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6668746 |
Lifting vessel and method for positioning, lifting and handling a platform deck and a jacket
A lifting vessel ( 1 ) consisting of a lower U-shaped pontoon foundation ( 2 a, 2 b, 2 c ), a number of vertical columns ( 5 ) attached to the pontoon foundation and extending upwards and through...
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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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6644893 |
Rigid jacket of an offshore platform having a quadrapod structure
A launchable rigid jacket of an offshore platform has a structure including an exterior framing and a plurality of cross-sectional frame sections. The exterior framing has four outside legs, which...
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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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6568880 |
Foundation system for tension leg platforms
A foundation system for tension leg platforms without use of foundation templates, wherein each tendon ( 5 ) is directly connected to a socket ( 9 ) inside a pile ( 8 ), the piles ( 8 ) being...
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6539888 |
Working ship
A working ship ( 1 ), comprising a hull ( 2 ) provided with driving means and a deck ( 3 ). The hull ( 2 ) is temporarily submersible. The deck ( 3 ) is connected to the hull by using connecting...
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6523491 |
Lift boat
An improved lift boat includes a hull, a plurality of legs (preferably three), a plurality of pads, one pad attached to each leg, and a jacking mechanism for moving each upward and downward....
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6524049 |
Semi-submersible, mobile drilling vessel with storage shaft for tubular drilling equipment
The drilling vessel includes at least one floating body and a platform which is supported by one or more support columns on the floating body and includes a drilling installation. The vessel is...
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6499914 |
Movable self-elevating artificial work island with modular hull
A buoyantly moveable, self-elevating (jack-up) artificial work island or platform self-assembled while floating upon a work body of water by reversibly coupling together a plurality of...
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6491477 |
Self-elevating drilling unit
A self-elevating drilling unit has dual cantilever assemblies that move longitudinally and transversely in relation to the jack-up platform to allow drilling operation to be performed from two...
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6447208 |
Extended base tension leg substructures and method for supporting offshore platforms
An extended-base tension leg substructure, an offshore platform supported on the substructure and a method for supporting an offshore platform on the substructure are disclosed, where the...
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6378451 |
Simplified ballast system for tension leg platforms
A simplified ballast system designed for a tension leg platform from which drilling and/or production activities are to be performed in a body of water provides for rapid deballasting via large...
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6378450 |
Dynamically positioned semi-submersible drilling vessel with slender horizontal braces
The invention relates to a semi-submersible vessel designed to operate in harsh environment. The vessel has a twin-hull pontoon structure that supports four corner caissons extending vertically...
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6374764 |
Deck installation system for offshore structures
An apparatus and method for installing a deck on an offshore substructure is provided. The apparatus comprises a deck supported by lifting mechanisms that are in turn attached to pontoons. The...
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6341573 |
Ship to platform transformer
A ship convertible to a floating aircraft runway supported above water level by slender vertical buoyant legs, and capable of remaining stable during inclement weather conditions. The slender...
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6305881 |
Barge stabilization method
An oil drilling barge stabilization system and method provide that an array of substantially vertically-oriented piles is formed in the sea bed to a depth beneath the sea bed that finds solid...
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6293734 |
Apparatus for transporting and installing a deck of an offshore oil production platform
Apparatus for transporting and installing a deck of an offshore oil production comprises a floating barge (10) adapted to support the deck (1) and provided with devices for moving the deck (1). The...
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6273645 |
Position penetrated anchor system
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6260502 |
Semi-submersible vessel
An uncrossed-braced, column stabilized semi-submersible and improved methods of operation of the same are disclosed. The semi-submersible vessel provides necessary strength to resist hydrodynamic...
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6257165 |
Vessel with movable deck and method
A vessel with a movable deck. The vessel will contain in one embodiment a catamaran hull having a first pontoon and a second pontoon. The catamaran hull has a platform attached thereto. The vessel...
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6247421 |
Method for DP-conversion of an existing semi-submersible rig
A method for converting a semi-submersible drilling or accommodation rig into a dynamically positioned vessel in which the rig has pontoon bodies submergible below a surface of a body of water for...
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