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| Number | Title | Issue Date |
| 7311469 | Floating lowering and lifting device A floating lowering and lifting device (1) includes a floating structure (2) and a lifting unit (3) lowerable from the floating structure (2) towards the sea bed, the lifting unit (3) having a chamber (5) with at least one g... | 12/25/2007 |
| 7255517 | Ballasting offshore platform with buoy assistance A method for deploying a floating platform includes storing buoys on a hull of the platform. Tension devices are mounted to the hull, each being connected by a line to one of the buoys. The operator tows the hull to a ballast down site while the buoys are stored on ... | 08/14/2007 |
| 7114883 | Offshore fluid transfer system and method Apparatus (12) for transferring fluid between floating vessels (10, 11) is described, comprising a submerged rigid transfer arm (13) carrying a fluid pipeline (16). The apparatus (12) is provided with thrusters (21) and posi... | 10/03/2006 |
| 7114884 | Method and apparatus for increasing floating platform buoyancy A floating platform for recovery of oil and gas from offshore oil and gas fields includes a hull having a portion located substantially below the water surface, and including a portion thereof which extends above the water surface. The platform is anchored to the se... | 10/03/2006 |
| 7037947 | Fischer-Tropsch synthesis process carried out on a floatable structure A process for the conversion of natural gas to higher hydrocarbons in a system comprising (1) a synthesis gas production unit and (2) a Fischer-Tropsch synthesis unit comprising at least one high shear mixing zone and a reactor vessel wherein the units are located a... | 05/02/2006 |
| 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 and equipment to be constructed in an upright position, towed to an oc... | 04/25/2006 |
| 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 second end of the vessel, and two parallel pontoon sections extending... | 03/14/2006 |
| 7011473 | Method for underwater transportation and installation or removal of objects at sea Method for transport and installation of objects at sea, particularly relating to transport and installation of obs jects that are part of the infrastructure in oil and gas fields offshore, the object (4) is put in the sea at a suitable location near the shor... | 03/14/2006 |
| 6942427 | Column-stabilized floating structure with telescopic keel tank for offshore applications and method of installation A floating offshore fluid storage caisson platform has a large diameter vertically oriented buoyant column or caisson, or multiple caissons, defining a storage chamber, and a telescopic keel tank disposed at the bottom end thereof, and may have deck on top of the ca... | 09/13/2005 |
| 6893190 | Method and structure for connecting a floating structure with rope anchor lines to the seabed A method of connecting a first floating structure to the seabed, includes the steps of: providing a second floating structure, anchored to first and second anchoring points respectively on the sea bed via at least two anchor lines, attaching the second floating stru... | 05/17/2005 |
| 6857821 | Device for lifting a seagoing construction such as a drilling rig, provided with lifting members running mutually parallel A device for lifting a seagoing construction such as a drilling rig, which device comprises one or more floater bodies, one or more beam-like lifting members supported movably on a floater body and running parallel or practically parallel to each other, wherein the ... | 02/22/2005 |
| 6840713 | Device for positioning and lifting a marine structure, particularly a platform deck A device for positioning and lifting a marine structure, particularly a platform deck, with the use of a U-shaped lifting vessel (1). The device has at least two adjustable lifting frames (12,12), each able to incline towards the middle of the docking ... | 01/11/2005 |
| 6786679 | Floating stability device for offshore platform An offshore well platform is towed in an upright condition to a well site by the use of a temporary flotation device. The flotation device mounts to a portion of the platform and is partially submerged, increasing the ability and buoyancy of the platform. At the sit... | 09/07/2004 |
| 6676334 | Work module support vessel An offshore construction system comprises a work module support vessel having a ballast-down mode, in which a deck of the vessel is submerged below the water surface, and a ballast-up mode, in which the deck is disposed above the water surface. The system... | 01/13/2004 |
| 6648553 | Load transfer unit and method for removing off-shore platform from substructure A platform topsides can be transferred from a substructure to a transporter by ballasting the transporter, locating the transporter underneath the topsides and deballasting the transporter, causing load transfer units of the transporter to lift the topsid... | 11/18/2003 |
| 6565286 | Method for fabricating and assembling a floating offshore structure A method for fabricating sections of a floating offshore spar type structure and mating the sections offshore. A buoyant hard tank is fabricated vertically. The hard tank is then transported in a vertical orientation to a site where it is mated to a truss... | 05/20/2003 |
| 6550411 | Method for removing a jacket of a drilling or production rig and vessel provided with a device therefor A method for removing a jacket of a drilling or production rig using a vessel provided with a deck includes manoeuvring the vessel close to the jacket, hoisting the jacket, and tilting the jacket relative to a tilting point located close to an edge of the... | 04/22/2003 |
| 6517290 | Loading arrangement for floating production storage and offloading vessel A loading arrangement includes a riser that extends from a subsea structure to a coupling element for coupling the riser to a vessel. The coupling element includes a buoy body which is connected to a retention member via a flexible connection part. The re... | 02/11/2003 |
| 6503023 | 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 and equipment to be constructed in an upright position, tow... | 01/07/2003 |
| 6471444 | Spar construction method A method of constructing SPAR buoys comprising an elongate floating body (1) and a deck structure (2). The elongate body (1) is transported to the mooring site in its horizontal position. During erecting of the floating body (1) by ballasting it with wate... | 10/29/2002 |
| 6428242 | Folding support for removable piers and similar structures The removable pier support system of the present invention comprises a plurality of folding pier support posts. Each post has a platform section having a horizontal base plate for supporting the post on a bed of a body of water. The base plate has a lower... | 08/06/2002 |
| 6425710 | Articulated multiple buoy marine platform apparatus A marine platform provides a plurality of buoys, a platform having a peripheral portion that includes a plurality of attachment positions, one attachment position for each buoy, and an articulating connection that connects each buoy to the platform at a r... | 07/30/2002 |
| 6299383 | Method for deck installations on offshore substructure An apparatus and method for the installation of a deck on an offshore substructure. The invention is particularly useful with a floating substructure. Two independent pontoons each have two columns spaced apart from each other that extend upwardly from th... | 10/09/2001 |
| 6210075 | Spar system An offshore hydrocarbon production system includes a spar (34, 52, 214) that floats at the sea surface, a subsea buoy (26, 154, 200, 210) lying under the spar and hanging from it, and one or more risers (20, 174, 220) that extend up to the subsea buoy and... | 04/03/2001 |
| 6210076 | Offshore deck installation A method and apparatus that eliminates the need for a derrick barge to lift the deck into place on a floating offshore structure. A connector is used to connect the transport barge to the floating offshore structure. The connector is a type that allows on... | 04/03/2001 |
| 6132143 | Method for lifting a sea platform from the substructure A method for lifting a sea platform with its substructure attached from a seabed and moving that platform to a different location. Use is made of flotation bodies which are filled with water and attached to the substructure. The flotation bodies can be em... | 10/17/2000 |
| 5924822 | Method for deck installation on an offshore substructure An apparatus and method for the installation of a deck on an offshore substructure. The invention is particularly useful with a floating substructure. Two independent pontoons each have two columns spaced apart from each other that extend upwardly from th... | 07/20/1999 |
| 5197825 | Tendon for anchoring a semisubmersible platform A tendon installation for anchoring a semisubmersible platform to a sea bed foundation, wherein said tendons are tensioned by the updrift of the platform. The tendons are prefabricated in dimensions adapted to the depth of the sea bed foundation, expected... | 03/30/1993 |
| 5188484 | Jack-up type offshore oil and gas production platform and method A mobile, self-elevating, offshore production platform, for exploitation of smaller reservoirs, is provided with a liquid tight hull having a deck; a plurality of support legs, each having a gear rack and bottom footpads, which are slidably extendable thr... | 02/23/1993 |
| 5098219 | Mobile submersible caisson for underwater oil-well drilling and production A mobile submersible caisson is employed to drill for and recover petroleum products from subsea wells and to deliver the products to shore or to vessels at the well site. The well drilling technique applies to water depths beyond 300 ft. and in areas whe... | 03/24/1992 |
| 4973200 | Method for manoeuvering a superstructure element relative to a fixed construction arranged in water, method for constructing a building structure and building structure constructed according to such a method A buoyant vessel which alone can support a heavy superstructure has a well within which a floating body is disposed. The floating body can displace sufficient water in the well to support the superstructure by itself. Valves are provided for transferring ... | 11/27/1990 |
| 4930938 | Offshore platform deck/jacket mating system and method A system and method for mating a preconstructed integrated deck mounted on a barge with a previously installed offshore jacket is provided. The system comprises at least two primary load transfer units, at least one secondary load transfer unit, and a plu... | 06/05/1990 |
| 4927296 | Method and installation for displacing a jacket of an artificial island in relation to an underwater base An artificial island structure which is constructed on land can be conveyed to and placed in a vertical standing position on an underwater base site by loading the island structure, while horizontal, on a floating buoyant carrier, transporting the carrier... | 05/22/1990 |
| 4909671 | Method for installation of a buoyant body on a sea bottom A method of installing a floatable or buoyant body on the sea floor includes towing the body to an installation site at the sea surface and subsequently submerging the body towards the sea floor by supplying ballast to the buoyant body. The supply of ball... | 03/20/1990 |
| 4869620 | Method and apparatus for constructing seawalls and docks A method and apparatus for making a dock or sea wall whereby the wall comprises at least one sectional dock member, the dock member comprising a concrete base section and a concrete wall section perpendicular to and attached thereto. A forming float devic... | 09/26/1989 |
| 4683832 | Device and method to set and salvage structures An offshore marine structure setting and recovery device and method that can lift great loads offshore. The unit consists of a conventional deck cargo barge fitted with one or more rails running almost the entire length of the barge. A horizontal jacking ... | 08/04/1987 |
| 4547095 | Method for the construction, transportation and site installation of a deep-sea lattice structure A method for the construction, transportation and site installation of a gravity-supported deep-sea lattice structure, characterized by using a dry dock only for constructing the base of the structure, this latter then being completed in protected deep wa... | 10/15/1985 |
| 4516882 | Method and apparatus for conversion of semi-submersible platform to tension leg platform for conducting offshore well operations A method of conducting offshore well operations including exploration drilling and production from a single floatable platform which is converted from semisubmersible exploration mode to tension leg production mode at a well site. A method of conversion o... | 05/14/1985 |
| 4473321 | Method of launching a large floatable object from a dock to water and delaunching it A method of launching a large object such as a ship, barge or floatable offshore structure from a dock to water at a lower level than the dock surface by pushing the object over the dock edge, supporting the portion of the object extending past the dock e... | 09/25/1984 |
| 4456402 | Method for increasing the stability of an artificial island by means of pre-loading The invention relates to a method for pre-loading the legs (2,3,4) of an artificial island (1) to increase the stability of the island preloading is performed by ballast (7-17) placed in or on the legs, this ballast being preferably located within flexibl... | 06/26/1984 |
