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Class Information
Number: 166/319
Name: Wells > Valves, closures or changeable restrictors > Fluid operated
Description: Devices wherein the valve is actuated in response to fluid pressure or fluid flow. The operating fluid may be derived from a source externally of the valve or it may be the fluid which flows through the valve.










Sub-classes under this class:

Class Number Class Name Patents
166/321 Fluid pressure biased to open position position 425
166/329 Loose ball closure with limited reverse flow 24
166/325 One way, e.g., check valve type 205
166/320 Variably opened 142


Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8701777 Downhole fluid flow control system and method having dynamic response to local well conditions Apr. 22, 2014
8701778 Downhole tester valve having rapid charging capabilities and method for use thereof Apr. 22, 2014
8701782 Subsurface safety valve with metal seal Apr. 22, 2014
8689887 Methods of operating a radial flow valve Apr. 8, 2014
8678110 Mud saver valve and method of operation of same Mar. 25, 2014
8668004 Tubing hanger running tool with integrated pressure release valve Mar. 11, 2014
8668014 Subsurface safety valve for high temperature and high pressure wells Mar. 11, 2014
8646535 Flow restriction devices Feb. 11, 2014
8627890 Rotating continuous flow sub Jan. 14, 2014
8622136 Method and apparatus for controlling fluid flow using movable flow diverter assembly Jan. 7, 2014
8616290 Method and apparatus for controlling fluid flow using movable flow diverter assembly Dec. 31, 2013
8602106 Downhole fluid flow control system and method having direction dependent flow resistance Dec. 10, 2013
8602111 Method and system for controlling a downhole flow control device Dec. 10, 2013
8602112 Control apparatus for downhole valves Dec. 10, 2013
8584762 Downhole fluid flow control system having a fluidic module with a bridge network and method for use of same Nov. 19, 2013
8567505 Injection of liquid into boreholes, with suckback pulsing Oct. 29, 2013
8555983 Apparatus and method for activating and deactivating a downhole tool Oct. 15, 2013
8550103 Utilizing swellable materials to control fluid flow Oct. 8, 2013
8550172 Plural barrier valve system with wet connect Oct. 8, 2013
8544552 System for pulse-injecting fluid into a borehole Oct. 1, 2013
8522887 Aquifier flow controlling valve assembly and method Sep. 3, 2013
8517108 Vortex controlled variable flow resistance device and related tools and methods Aug. 27, 2013
8517107 Vortex controlled variable flow resistance device and related tools and methods Aug. 27, 2013
8517106 Vortex controlled variable flow resistance device and related tools and methods Aug. 27, 2013
8517105 Vortex controlled variable flow resistance device and related tools and methods Aug. 27, 2013
8517099 Tubular member having self-adjusting valves controlling the flow of fluid into or out of the tubular member Aug. 27, 2013
8499826 Intelligent pressure actuated release tool Aug. 6, 2013
8501012 Bypass filter apparatus and method Aug. 6, 2013
8479826 Protection of a safety valve in a subterranean well Jul. 9, 2013
8474534 Functionalized surface for flow control device Jul. 2, 2013
8474535 Well screen inflow control device with check valve flow controls Jul. 2, 2013
8453749 Control system for an annulus balanced subsurface safety valve Jun. 4, 2013
8453745 Vortex controlled variable flow resistance device and related tools and methods Jun. 4, 2013
8448659 Check valve assembly for well stimulation operations May. 28, 2013
8439117 Vortex controlled variable flow resistance device and related tools and methods May. 14, 2013
8381817 Vortex controlled variable flow resistance device and related tools and methods Feb. 26, 2013
8381821 Gas lift valve Feb. 26, 2013
8376047 Variable flow restrictor for use in a subterranean well Feb. 19, 2013
8356668 Variable flow restrictor for use in a subterranean well Jan. 22, 2013
8327945 Remotely operated drill pipe valve Dec. 11, 2012
8316946 Subsea completion with a wellhead annulus access adapter Nov. 27, 2012
8316943 Methods and apparatus for a downhole tool Nov. 27, 2012
8312931 Flow restriction device Nov. 20, 2012
8307902 Downhole flow control tool and method Nov. 13, 2012
8307905 Activating mechanism Nov. 13, 2012
8297304 Storage container for liquid chlorosilane and closing lid therefor Oct. 30, 2012
8291984 Control device for an inflatable tool for the treatment of a well or a pipeline Oct. 23, 2012
8281865 Tubular valve system and method Oct. 9, 2012
8276675 System and method for servicing a wellbore Oct. 2, 2012
8276670 Downhole dissolvable plug Oct. 2, 2012

1 2 3 4 5 6 7 8 9










 
 
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