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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617874 |
Flexible matrix composite actuator for use in subsurface wellbores |
Nov. 17, 2009 |
| 7614454 |
Downhole actuation method and apparatus for operating remote well control device |
Nov. 10, 2009 |
| 7597149 |
Safety valve with extension springs |
Oct. 6, 2009 |
| 7591319 |
Gas activated actuator device for downhole tools |
Sep. 22, 2009 |
| 7584800 |
System and method for indexing a tool in a well |
Sep. 8, 2009 |
| 7575051 |
Downhole vibratory tool |
Aug. 18, 2009 |
| 7562713 |
Downhole actuation tools |
Jul. 21, 2009 |
| 7562712 |
Setting tool for hydraulically actuated devices |
Jul. 21, 2009 |
| 7552773 |
Multicycle hydraulic control valve |
Jun. 30, 2009 |
| 7552774 |
Control line hydrostatic minimally sensitive control system |
Jun. 30, 2009 |
| 7537056 |
System and method for gas shut off in a subterranean well |
May. 26, 2009 |
| 7503385 |
Single line control module for well tool actuation |
Mar. 17, 2009 |
| 7467658 |
Down hole drilling fluid heating apparatus and method |
Dec. 23, 2008 |
| 7464759 |
Method for flowing fluid into or from a well |
Dec. 16, 2008 |
| 7464761 |
Flow control system for use in a well |
Dec. 16, 2008 |
| 7455114 |
Snorkel device for flow control |
Nov. 25, 2008 |
| 7438130 |
Downhole actuating apparatus and method |
Oct. 21, 2008 |
| 7424917 |
Subsea pressure compensation system |
Sep. 16, 2008 |
| 7422065 |
System for controlling zones of fluid in and out of a wellbore |
Sep. 9, 2008 |
| 7389821 |
Downhole trigger device having extrudable time delay material |
Jun. 24, 2008 |
| 7363980 |
Downhole flow control apparatus, operable via surface applied pressure |
Apr. 29, 2008 |
| 7357198 |
Downhole apparatus |
Apr. 15, 2008 |
| 7331392 |
Pressure range delimited valve |
Feb. 19, 2008 |
| 7331396 |
Subsea production systems |
Feb. 19, 2008 |
| 7311153 |
Flow-biased sequencing valve |
Dec. 25, 2007 |
| 7306043 |
System and method to control multiple tools through one control line |
Dec. 11, 2007 |
| 7303020 |
Interventionless oil tool actuator with floating piston and method of use |
Dec. 4, 2007 |
| 7299866 |
Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well |
Nov. 27, 2007 |
| 7296624 |
Pressure control apparatus and method |
Nov. 20, 2007 |
| 7264059 |
Method and device for pressure controlled sequential operation |
Sep. 4, 2007 |
| 7252153 |
Bi-directional fluid loss device and method |
Aug. 7, 2007 |
| 7240737 |
Direct proportional surface control system for downhole choke |
Jul. 10, 2007 |
| 7216713 |
Downhole actuating apparatus and method |
May. 15, 2007 |
| 7204315 |
Dual valve well control in underbalanced wells |
Apr. 17, 2007 |
| 7201230 |
Hydraulic control and actuation system for downhole tools |
Apr. 10, 2007 |
| 7178600 |
Apparatus and methods for utilizing a downhole deployment valve |
Feb. 20, 2007 |
| 7168492 |
Wellbore annulus flushing valve |
Jan. 30, 2007 |
| 7159662 |
System for controlling a hydraulic actuator, and methods of using same |
Jan. 9, 2007 |
| 7108068 |
Floating plate back pressure valve assembly |
Sep. 19, 2006 |
| RE39209 |
Production fluid control device and method for oil and/or gas wells |
Aug. 1, 2006 |
| 7013980 |
Hydraulically actuated control system for use in a subterranean well |
Mar. 21, 2006 |
| 6978841 |
Sand removal and device retrieval tool |
Dec. 27, 2005 |
| 6904975 |
Interventionless bi-directional barrier |
Jun. 14, 2005 |
| 6889771 |
Selective direct and reverse circulation check valve mechanism for coiled tubing |
May. 10, 2005 |
| 6877566 |
Method and apparatus for causing pressure variations in a wellbore |
Apr. 12, 2005 |
| 6866100 |
Mechanically opened ball seat and expandable ball seat |
Mar. 15, 2005 |
| 6867706 |
Frequency regulation of an oscillator for use in MWD transmission |
Mar. 15, 2005 |
| 6827146 |
Double bellows gas lift valve "faustoval" |
Dec. 7, 2004 |
| 6782951 |
Flow-activated valve and method of use |
Aug. 31, 2004 |
| 6782948 |
Remotely operated multi-zone packing system |
Aug. 31, 2004 |
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