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Class Information
Number: 166/375
Name: Wells > Processes > Operating valve, closure, or changeable restrictor in a well > Operated by fluid pressure controlled above ground > By auxilliary fluid control line
Description: Process wherein the fluid pressure change which is initiated by an above ground operator is communicated to the flow regulating device by a conduit used exclusively for that purpose.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7594542 |
Alternate path indexing device |
Sep. 29, 2009 |
| 7591317 |
Tubing pressure insensitive control system |
Sep. 22, 2009 |
| 7520332 |
Method and associated system for setting downhole control pressure |
Apr. 21, 2009 |
| 7520333 |
Hydraulic sleeve valve with position indication, alignment, and bypass |
Apr. 21, 2009 |
| 7510013 |
Hydraulic metering valve for operation of downhole tools |
Mar. 31, 2009 |
| 7464761 |
Flow control system for use in a well |
Dec. 16, 2008 |
| 7397388 |
Borehold telemetry system |
Jul. 8, 2008 |
| 7392849 |
Balance line safety valve with tubing pressure assist |
Jul. 1, 2008 |
| 7347270 |
Redundant hydraulic system for safety valve |
Mar. 25, 2008 |
| 7337850 |
System and method for controlling actuation of tools in a wellbore |
Mar. 4, 2008 |
| 7331398 |
Multi-drop flow control valve system |
Feb. 19, 2008 |
| 7306043 |
System and method to control multiple tools through one control line |
Dec. 11, 2007 |
| 7273107 |
Valve within a control line |
Sep. 25, 2007 |
| 7240737 |
Direct proportional surface control system for downhole choke |
Jul. 10, 2007 |
| 7231971 |
Downhole safety valve assembly having sensing capabilities |
Jun. 19, 2007 |
| 7213653 |
Deep set safety valve |
May. 8, 2007 |
| 7178600 |
Apparatus and methods for utilizing a downhole deployment valve |
Feb. 20, 2007 |
| 7055607 |
Seal assembly for a safety valve |
Jun. 6, 2006 |
| 6988556 |
Deep set safety valve |
Jan. 24, 2006 |
| 6953093 |
Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve |
Oct. 11, 2005 |
| 6880641 |
Subsurface safety valve and method for communicating hydraulic fluid therethrough |
Apr. 19, 2005 |
| 6866101 |
Control system with failsafe feature in the event of tubing rupture |
Mar. 15, 2005 |
| 6742595 |
Subsurface safety valve lock out and communication tool and method for use of the same |
Jun. 1, 2004 |
| 6736213 |
Method and system for controlling a downhole flow control device using derived feedback control |
May. 18, 2004 |
| 6715558 |
Infinitely variable control valve apparatus and method |
Apr. 6, 2004 |
| 6691785 |
Isolation valve |
Feb. 17, 2004 |
| 6691786 |
Inflatable flow control device and method |
Feb. 17, 2004 |
| 6668935 |
Valve for use in wells |
Dec. 30, 2003 |
| 6668936 |
Hydraulic control system for downhole tools |
Dec. 30, 2003 |
| 6668921 |
Providing a conduit for an instrumentation line |
Dec. 30, 2003 |
| 6659184 |
Multi-line back pressure control system |
Dec. 9, 2003 |
| 6659185 |
Subsurface safety valve lock out and communication tool and method for use of the same |
Dec. 9, 2003 |
| 6595296 |
Hydraulic control assembly |
Jul. 22, 2003 |
| 6595292 |
Method and apparatus for use with two or more hydraulic conduits deployed downhole |
Jul. 22, 2003 |
| 6575237 |
Hydraulic well control system |
Jun. 10, 2003 |
| 6568481 |
Deep well instrumentation |
May. 27, 2003 |
| 6567013 |
Digital hydraulic well control system |
May. 20, 2003 |
| 6536530 |
Hydraulic control system for downhole tools |
Mar. 25, 2003 |
| 6536529 |
Communicating commands to a well tool |
Mar. 25, 2003 |
| 6523614 |
Subsurface safety valve lock out and communication tool and method for use of the same |
Feb. 25, 2003 |
| 6516888 |
Device and method for regulating fluid flow in a well |
Feb. 11, 2003 |
| 6513594 |
Subsurface safety valve |
Feb. 4, 2003 |
| 6508308 |
Progressive production methods and system |
Jan. 21, 2003 |
| 6505684 |
Hydraulic actuator |
Jan. 14, 2003 |
| 6502640 |
Hydraulic actuator |
Jan. 7, 2003 |
| 6491106 |
Method of controlling a subsurface safety valve |
Dec. 10, 2002 |
| 6401826 |
Lubricator for underbalanced drilling |
Jun. 11, 2002 |
| 6390193 |
Downhole connector for production tubing and control line and method |
May. 21, 2002 |
| 6349770 |
Telescoping tool |
Feb. 26, 2002 |
| 6321842 |
Flow control in a wellbore |
Nov. 27, 2001 |
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