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Class Information
Number: 166/351
Name: Wells > Submerged well > Means removably connected to permanent well structure
Description: Process or apparatus intended to be used in the operation or formation of a well and intended to be removable from the well without destruction of the well.










Sub-classes under this class:

Class Number Class Name Patents
166/358 Drilling means 136
166/356 Means to provide protective environment for operative access below surface of water 97
166/361 Pipe cutting means 57
166/359 Removable riser 176
166/357 Separator 140
166/352 Surface vessel 168
166/360 Well component assembly means 120


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8684089 Method and system for circulating fluid in a subsea intervention stack Apr. 1, 2014
8684090 Slip connection with adjustable pre-tensioning Apr. 1, 2014
8672037 Plug removal and setting system Mar. 18, 2014
8662182 Methods and apparatus for subsea well intervention and subsea wellhead retrieval Mar. 4, 2014
8657011 Underwater power generation Feb. 25, 2014
8651189 Blowout recovery valve Feb. 18, 2014
8627891 Manifold structure having adjustable brackets Jan. 14, 2014
8622137 Subsea structure installation or removal Jan. 7, 2014
8607879 Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use Dec. 17, 2013
8579033 Rotating and reciprocating swivel apparatus and method with threaded end caps Nov. 12, 2013
8561705 Lead impression wear bushing Oct. 22, 2013
8550170 Retrievable flow module unit Oct. 8, 2013
8534364 Assembly and method for production of gas or gas and condensate/oil Sep. 17, 2013
8528646 Broken pipe blocker Sep. 10, 2013
8485262 Modular, stackable wellhead system Jul. 16, 2013
8485260 Modular backup fluid supply system Jul. 16, 2013
8430167 Arcuate control line encapsulation Apr. 30, 2013
8393399 Blowout preventer with intervention, workover control system functionality and method Mar. 12, 2013
8381819 Rotation mechanism Feb. 26, 2013
8376049 Running tool for deep water Feb. 19, 2013
8376050 Sampling skid for subsea wells Feb. 19, 2013
8353351 System and method for regulating pressure within a well annulus Jan. 15, 2013
8342248 Apparatus for venting an annular space between a liner and a pipeline of a subsea riser Jan. 1, 2013
8342249 Offshore drilling system Jan. 1, 2013
8322434 Vertical annular separation and pumping system with outer annulus liquid discharge arrangement Dec. 4, 2012
8322440 Integrated electrical connector for use in a wellhead tree Dec. 4, 2012
8322441 Open water recoverable drilling protector Dec. 4, 2012
8322442 Well unloading package Dec. 4, 2012
8307903 Methods and apparatus for subsea well intervention and subsea wellhead retrieval Nov. 13, 2012
8281863 Detachable electrical actuator Oct. 9, 2012
8235121 Subsea control jumper module Aug. 7, 2012
8230928 Low profile internal tree cap Jul. 31, 2012
8220550 Wellhead housing bootstrap device Jul. 17, 2012
8220551 Subsea toroidal water separator Jul. 17, 2012
8215405 Method to shut down a high pressure oil/gas well that is leaking under blowout conditions Jul. 10, 2012
8186441 Modular backup fluid supply system May. 29, 2012
8141643 Method and frame Mar. 27, 2012
8056634 Off-center running tool for subsea tree Nov. 15, 2011
8016042 Stress distributing wellhead connector Sep. 13, 2011
8006765 Well servicing tool storage system for subsea well intervention Aug. 30, 2011
7984765 System and method for well intervention Jul. 26, 2011
7958948 Method and system for return of drilling fluid Jun. 14, 2011
7934376 Hydraulic actuation assembly May. 3, 2011
7934560 Free standing riser system and method of installing same May. 3, 2011
7934561 Depth compensated subsea passive heave compensator May. 3, 2011
7934562 Hybrid control system and method May. 3, 2011
7921917 Multi-deployable subsea stack system Apr. 12, 2011
7921918 Support apparatus for a well bore tool Apr. 12, 2011
7891429 Riserless modular subsea well intervention, method and apparatus Feb. 22, 2011
7770649 Locking device Aug. 10, 2010

1 2 3










 
 
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