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Class Information
Number: 405/203
Name: Hydraulic and earth engineering > Marine structure or fabrication thereof > Floatable to site and supported by marine floor
Description: Method or apparatus wherein the construction is itself buoyant in water or has attached thereto separate buoyant transport means, whereby the construction may be moved on the surface of a body of water until it is located in a position where the construction will be used, at which position the construction, or a portion thereof, is submerged into contact with the bottom of the body of water.

Sub-classes under this class:

Class Number Class Name Patents
405/209 Separable transport means 136
405/204 With assembly of sectional supporting structure at site 236
405/205 With ballasting means to sink or position structure at site 203

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8689881 Offshore unit and method of installing wellhead platform using the offshore unit Apr. 8, 2014
8678707 Well-head blowout containment system Mar. 25, 2014
8657533 Gravity base structure Feb. 25, 2014
8628274 Tension leg connection system and method Jan. 14, 2014
8613569 Stationary positioned offshore windpower plant (OWP) and the methods and means for its assembling, transportation, installation and servicing Dec. 24, 2013
8523491 Mobile, year-round arctic drilling system Sep. 3, 2013
8430602 System for increased floatation and stability on tension leg platform by extended buoyant pontoons Apr. 30, 2013
8403058 Offshore unit and method of installing wellhead platform using the offshore unit Mar. 26, 2013
8312828 Preloading to reduce loads and save steel on topsides and grillage of catamaran systems Nov. 20, 2012
8282316 Method and assembly for installing oilfield equipment at the water bottom Oct. 9, 2012
8251615 System and method for releasing a barge from a topside during a float-over installation Aug. 28, 2012
8240955 Tower segments and method for off-shore wind turbines Aug. 14, 2012
8230802 Method for transporting, erecting and replacing a nacelle including the rotor of an offshore wind turbine and watercraft for carrying out the method Jul. 31, 2012
8070388 Structure for transporting, commissioning and decommissioning the elements of a fixed oil platform and methods for implementing such a structure Dec. 6, 2011
7934887 Complementary locking system for locking legs to the deck of an offshore drilling platform and methods for installing one such locking system May. 3, 2011
7887261 Method for the transport of a civil engineering structure in an aquatic medium Feb. 15, 2011
7882792 Auxiliary floating structure and procedure for descent of equipment into the sea Feb. 8, 2011
7850398 Jackup oil rig and similar platforms Dec. 14, 2010
7717642 Buoyancy stabilized pier May. 18, 2010
7690866 Offshore oil-drilling rig and methods for installing same on an offshore oil-drilling site Apr. 6, 2010
7513713 Structure for transporting, commissioning and decommissioning of a deck of a fixed oil platform and method for implementing the structure Apr. 7, 2009
7467912 Extendable draft platform with buoyancy column strakes Dec. 23, 2008
7325628 Anchor for vehicle, vehicle and anchor in combination, and method of using the anchor Feb. 5, 2008
7311469 Floating lowering and lifting device Dec. 25, 2007
7299760 Floating LNG import terminal and method for docking Nov. 27, 2007
7281881 Column-stabilized platform with water-entrapment plate Oct. 16, 2007
7234409 Vessel for transporting wind turbines, methods of moving a wind turbine, and a wind turbine for an off-shore wind farm Jun. 26, 2007
7138038 Expandable anode pod Nov. 21, 2006
7131388 Lift boat Nov. 7, 2006
7112010 Apparatus, systems and methods for erecting an offshore wind turbine assembly Sep. 26, 2006
7101118 Multi hull barge Sep. 5, 2006
7086809 Minimum floating offshore platform with water entrapment plate and method of installation Aug. 8, 2006
7037947 Fischer-Tropsch synthesis process carried out on a floatable structure May. 2, 2006
7011473 Method for underwater transportation and installation or removal of objects at sea Mar. 14, 2006
7001108 Mat supported offshore structure Feb. 21, 2006
6997643 LNG tanker offloading in shallow water Feb. 14, 2006
6981823 Method and arrangement for installation and removal of objects at sea Jan. 3, 2006
6979147 Enhanced LNG tanker offloading in shallow waters Dec. 27, 2005
6955503 Method for salvaging offshore jackets Oct. 18, 2005
6945737 Single column extendable draft offshore platform Sep. 20, 2005
6945736 Offshore platform for drilling after or production of hydrocarbons Sep. 20, 2005
6942427 Column-stabilized floating structure with telescopic keel tank for offshore applications and method of installation Sep. 13, 2005
6935810 Semi-submersible multicolumn floating offshore platform Aug. 30, 2005
6923598 Method and apparatus for the lifting of offshore installation jackets Aug. 2, 2005
6901998 Method for using a multipurpose system Jun. 7, 2005
6899492 Jacket frame floating structures with buoyancy capsules May. 31, 2005
6887016 Mudmat foundation for subsea equipment May. 3, 2005
6857821 Device for lifting a seagoing construction such as a drilling rig, provided with lifting members running mutually parallel Feb. 22, 2005
6832875 Floating plant for liquefying natural gas Dec. 21, 2004
6808337 Vessel with vertically elevational support legs Oct. 26, 2004

1 2 3 4 5 6

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