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Class Information
Number: 166/352
Name: Wells > Submerged well > Means removably connected to permanent well structure > Surface vessel
Description: Process or apparatus including structure adapted to buoyantly rest upon the surface of the water above the well.










Sub-classes under this class:

Class Number Class Name Patents
166/354 Having means to hold vessel at given location (e.g., anchor, etc.) 35
166/353 Having means to move vessel to precise location 20
166/355 With means to compensate for vessel movement 230


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8689881 Offshore unit and method of installing wellhead platform using the offshore unit Apr. 8, 2014
8678094 Multiple activity rig Mar. 25, 2014
8657011 Underwater power generation Feb. 25, 2014
8657013 Riser system Feb. 25, 2014
8623107 Gas hydrate conversion system for harvesting hydrocarbon hydrate deposits Jan. 7, 2014
8622137 Subsea structure installation or removal Jan. 7, 2014
8607877 Pumping module and system Dec. 17, 2013
8607878 System and method for cathodic protection of a subsea well-assembly Dec. 17, 2013
8602108 Subsea tree safety control system Dec. 10, 2013
8590297 Hydraulically-powered compressor Nov. 26, 2013
8579033 Rotating and reciprocating swivel apparatus and method with threaded end caps Nov. 12, 2013
8555976 Emergency disconnect sequence timer display and method Oct. 15, 2013
8555978 Dual pathway riser and its use for production of petroleum products in multi-phase fluid pipelines Oct. 15, 2013
8540030 Riser lifecycle management system, program product, and related methods Sep. 24, 2013
8528647 Riser pipe with rigid auxiliary lines assembled by pins Sep. 10, 2013
8528666 Method and apparatus for disposal of cuttings Sep. 10, 2013
8517109 Floating vessel for supporting well head surface equipment Aug. 27, 2013
8517112 System and method for subsea control and monitoring Aug. 27, 2013
8517111 Systems and methods for circulating out a well bore influx in a dual gradient environment Aug. 27, 2013
8517110 Ram tensioner system Aug. 27, 2013
8511389 System and method for inductive signal and power transfer from ROV to in riser tools Aug. 20, 2013
8511386 Pumping module and system Aug. 20, 2013
8496063 Separation of drill cuttings from drilling fluid on a seabed Jul. 30, 2013
8464525 Subsea power fluid recovery systems Jun. 18, 2013
8453758 Dual density mud return system Jun. 4, 2013
8439109 System and method for depth measurement and correction during subsea intervention operations May. 14, 2013
8434557 Methods and systems for controlling flow of hydrocarbons from a structure or conduit May. 7, 2013
8430169 Method for managing hydrates in subsea production line Apr. 30, 2013
8413723 Methods of using enhanced wellbore electrical cables Apr. 9, 2013
8413724 Gas handler, riser assembly, and method Apr. 9, 2013
8403058 Offshore unit and method of installing wellhead platform using the offshore unit Mar. 26, 2013
8387704 System and method for simultaneous sea drilling operations Mar. 5, 2013
8387701 Intervention system dynamic seal and compliant guide Mar. 5, 2013
8376048 Offshore installation attachment system Feb. 19, 2013
8347967 Subsea tree safety control system Jan. 8, 2013
8336629 Method and system for running subsea test tree and control system without conventional umbilical Dec. 25, 2012
8336630 Subsea well production system Dec. 25, 2012
8322431 Wellbore servicing compositions and methods of making and using same Dec. 4, 2012
8322429 Interchangeable subsea wellhead devices and methods Dec. 4, 2012
8322428 Casing hanger nesting indicator Dec. 4, 2012
8316947 System and method for deployment of a subsea well intervention system Nov. 27, 2012
8297361 Sea bed oil recovery system Oct. 30, 2012
8267201 Method and apparatus for disposal of cuttings Sep. 18, 2012
8256520 Drill ship Sep. 4, 2012
8235123 Separating device Aug. 7, 2012
8196666 Flexible riser and method for pulling-in and hanging up thereof Jun. 12, 2012
8186442 System, vessel and method for production of oil and heavier gas fractions from a reservoir below the seabed May. 29, 2012
8176985 Well drilling and production using a surface blowout preventer May. 15, 2012
8162062 Offshore well intervention lift frame and method Apr. 24, 2012
8162063 Dual gradient drilling ship Apr. 24, 2012

1 2 3 4










 
 
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