Matches 51 - 100 out of 219 < 1 2 3 4 5 >
Match Document Document Title
6244785 Precast, modular spar system  
A precast, modular spar system (10) having a cylindrical open-ended spar of relatively uniform cross section. The spar has a freeboard section (50), a buoyancy section (70), and a ballast section...
6173781 Slip joint intervention riser with pressure seals and method of using the same  
A pressurized slip joint for a marine intervention riser decouples the flowhead assembly in the moon pool of a vessel from the riser string, enabling safe changeover of equipment during workover...
6155748 Deep water riser flotation apparatus  
A dual phase riser flotation system contains a number of passive phase buoyancy modules of syntactic foam contained within an outer skin, and a number of active phase buoyancy modules which are...
6142709 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 the pile (8), said piles (8) being positioned...
6132144 Passive anchor latch  
A passive anchor latching mechanism which allows its user to attach a moog line to an anchor without using a secondary mechanism such as a remotely operated vehicle to attach the cable or anchor...
6113314 Disconnectable tension leg platform for offshore oil production facility  
A quick connect/disconnect system for an offshore oil/gas production platform is facilitated by a submerged connection header for the platform. The platform comprises a vessel with a connection bay...
6109834 Composite tubular and methods  
The present invention relates to an apparatus and methods for coupling objects that are displaced from one another. In particular, the present invention relates to an apparatus and methods for...
6106198 Method for installation of tension-leg platforms and flexible tendon  
A process comprising: fixing a first end of a tendon to an anchor; lowering the anchor to the sea floor; securing the anchor to the sea floor; fixing a second end of the tendon to the platform. A...
6062769 Enhanced steel catenary riser system  
A riser arrangement increases the stability and/or decreases sensitivity to vortex induced vibration of risers of a riser system including steel tubular lines, SCRIBS and flexible hose risers...
6059336 Hydraulically actuated mechanical coupler  
A connector unit is disclosed which comprises a shaft, a plurality of collet fingers, and a sleeve. The plurality of collet fingers are peripherally positioned against the generally cylindrical...
6045296 Tension ring for riser  
A tensioning device is provided for applying tension to a riser from a surface deck of an offshore oil or gas well. The tensioning device is used with a riser of the type having threads formed on...
6027286 Offshore spar production system and method for creating a controlled tilt of the caisson axis  
An offshore system is provided of the type that includes riser pipes (30) extending up from the seafloor (44) to a tall and narrow caisson (12) at the sea surface, with the caisson moored by...
6022174 Method for installing a tension leg platform  
6017168 Fluid assist bearing for telescopic joint of a RISER system  
An undersea telescopic joint for a riser system is connected to a drilling vessel with a plurality of tensioners. The joint has a bearing with inner and outer annular mating members. A cap seals...
6012873 Buoyant leg platform with retractable gravity base and method of anchoring and relocating the same  
A deep water platform, suitable for use as a hydrocarbon exploration or production facility in very deep offshore waters, and a method of constructing the same are shown. The platform is positioned...
5997218 Method of and apparatus for stabilizing a tension-leg platform in deep water operations  
A process comprising: generating a stabilizing moment, before the platform is secured and tensioned to the sea floor, wherein the generating vertically aligns the central axis of the TLP; and...
5964550 Minimal production platform for small deep water reserves  
In a tension-leg mooring system a production platform supporting one or more decks above the water surface for accommodating equipment to process oil, gas, and water recovered from a subsea...
5899638 Floating platform top connector  
A segmented ring forms a set of latches for a tendon top connector on a floating platform. The latches reside in a housing and have either a groove or thread profile on an upper internal surface....
5873678 Tension adjustment mechanism employing stepped or serrated ramps for adjusting tension of a tendon from a floating marine platform  
Vertical movement of a floating marine platform is reduced by tendons extending from the platform to anchors on the seabed. A final tension adjustment to equalize the load on all of the tendons is...
5791819 Buoyant platform  
A floating platform comprising in combination a semisubmersible vessel (40) having two or more pontoons, buoyant columns upstanding from those pontoons and a deck supported on the columns (the...
5775836 Capping device for uniform capping of subaquatic sediments  
A capping vessel and method for the low-turbidity delivery of a desired depth of capping materials to the sediment surface of a body of water along a predetermined course, the vessel comprising at...
5707178 Tension base for tension leg platform  
An offshore platform for supporting a platform deck in deep water. A buoyant base is submerged below the water surface and is retained with base tendons to a foundation on the sea floor. The...
5704731 Multipurpose offshore modular platform  
Modular floating structures suitable for supporting offshore oil drilling and production platforms may be fabricated utilizing a Y-shaped joint interconnecting plural legs of a space frame. The...
5667340 Cementitious composition for underwater use and a method for placing the composition underwater  
A method for placing concrete underwater comprising pumping a flowable cementitious mixture comprising cement, water and one of either BNS or a cellulosic polymer to the underwater point of...
5651640 Complaint platform with parasite mooring through auxiliary vessel  
A parasite mooring system is disclosed for restraining a compliant platform with respect to an auxiliary vessel. The parasite mooring system includes a parasite mooring line, a platform termination...
5641248 Variable spring rate compression element and riser tensioner system using the same  
A compression element having a deflectable elastomeric member is disclosed. The compression element exhibits a decreasing axial spring rate in response to axial movement and compression of the...
5628586 Elastomeric riser tensioner system  
A riser tensioner system for applying a substantially constant tensioning force to a riser and allowing a floating platform to move within a given range along a longitudinal axis of the riser. The...
5590982 Tendon cluster array  
A tendon cluster array is disclosed for tethering a superstructure of a tension leg platform to an ocean floor in which a plurality of tendons are anchored to the ocean floor at their lower ends...
5575592 TLP tension adjust system  
A tension leg platform system includes a relatively small platform (12, FIG. 3 ) and relatively low capacity tendons (16), despite providing sufficient tension to risers (34) that carry...
5567086 Tension leg caisson and method of erecting the same  
A tension leg caisson is disclosed for supporting surface facilities on a deck for conducting hydrocarbon recovery operations in deepwater location applications. The tension leg caisson has an...
5551802 Tension leg platform and method of installation therefor  
An offshore tension leg platform having a deck, a hull, and a plurality of elongate tendons securing the hull to an ocean floor foundation provides full well workover and production capabilities...
5551803 Riser tensioning mechanism for floating platforms  
An apparatus for tensioning a riser that extends from a floating platform to a subsea wellhead has hydraulic cylinders. The hydraulic cylinders attach between the platform and the riser in a...
5542783 TLP and detachable derrick vessel  
An offshore production system of the type that includes a TLP (tension leg platform) (12) and a derrick vessel (14) which moves to the TLP platform (16) whenever the derrick is required. The vessel...
5525011 Semi-submerged movable modular offshore platform  
A modular offshore movable drilling platform support includes a double-layer dodecahedrous float having an outer dodecahedrous structure and an inner dodecahedrous structure defining a sealed...
5522681 Thread seal for segmented nut  
A connector employs a segmented nut and a seal. The connector includes a housing with a bore having a bowl in it. A shaft extends through the bore, the shaft having exterior threads. Segments are...
5507598 Minimal tension leg tripod  
A tension leg tripod is disclosed for supporting surface facilities on a deck for conducting hydrocarbon recovery operations in deepwater location applications. The tension leg tripod has an...
5486070 Method for conducting offshore well operations  
A method for conducting offshore well operations is disclosed in which a compliant platform is restrained out of its normal position substantially over a well pattern by adjusting a first lateral...
5447392 Backspan stress joint  
An improved support system is disclosed for providing flexibility to a restrained termination of a highly pressurized, highly tensioned tubular element which extends from a subsea facility to a...
5443330 Deep water platform with buoyant flexible piles  
A deep water platform, suitable for use as a hydrocarbon exploration or production facility in very deep offshore waters, and a method of constructing the same are shown. The platform is positioned...
5439324 Bumper docking between offshore drilling vessels and compliant platforms  
A bumper system is disclosed for docking an auxiliary drilling vessel to a compliant platform through first and second pads having vertically extending, complementary outboard faces presented from...
5439323 Rod and shell composite riser  
A riser section for an oil or other fossil fuel floating platform is described having a high strength-to-weight ratio. The riser section includes a composite tubular shell for conveying the...
5431511 Tension leg platform  
A tension leg platform for supporting an oil rig above a seabed includes a deck, a buoyant hull and a single tubular tether. The tether has a lower end penetrating into the seabed and an upper end...
5423632 Compliant platform with slide connection docking to auxiliary vessel  
An improved method for conducting offshore well operations is disclosed in which a compliant platform is installed adjacent a selected well site and an auxiliary vessel is temporarily docked to the...
5421676 Tension leg platform and method of instalation therefor  
A compact offshore tension leg platform having a deck, a hull, and a plurality of elongate tendons securing the hull to an ocean floor foundation provides full well workover and production...
5410979 Small fixed teardrop fairings for vortex induced vibration suppression  
A non-rotatable fairing for suppression of vortex-induced vibration of a marine tubular is provided, the tubular having a circular cross section and a centerline that is normal to the circular...
5342148 Method and system for developing offshore hydrocarbon reserves  
A method and system are disclosed for establishing hydrocarbon production for offshore reservoirs in which a compliant platform is installed at a selected site, an offshore drilling vessel is...
5340237 Guide-post interchangeability mechanism operated by remotely controlled vehicle  
This invention concerns a mechanism for the interchanging of guide-posts worked by remotely controlled vehicle which consists of guide-cones (6) provided in the side of base beam (2) that supports...
5330294 Riser for a great water depth  
A riser adapted to be immersed at a deep water level and including a main tube or an extension tube and peripheral lines. The riser includes at least two of an internal lining of an extension tube,...
5324141 Mooring apparatus and method of installation for deep water tension leg platform  
Apparatus for mooring attachment of a floating tension leg platform to a subsea anchorage. The apparatus includes a tendon with an enlarged connector on one end, the connector being formed by a...
5318385 Supporting system for lines and conductor pipes at offshore platforms  
A supporting system for lines and connecting pipes at offshore platforms consists of a supporting structure next to an offshore platform structure. The supporting structure consists of cones lying...
Matches 51 - 100 out of 219 < 1 2 3 4 5 >