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Class Information
Number: 166/332.8
Name: Wells > Valves, closures or changeable restrictors > Longitudinally movable operator > Flapper type
Description: Longitudinally moveable operator wherein the flow regulating device comprises a hinged plate allowing flow in one direction.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7621336 |
Casing shoes and methods of reverse-circulation cementing of casing |
Nov. 24, 2009 |
| 7621337 |
Casing shoes and methods of reverse-circulation cementing of casing |
Nov. 24, 2009 |
| 7614452 |
Flow reversing apparatus and methods of use |
Nov. 10, 2009 |
| 7604056 |
Downhole valve and method of making |
Oct. 20, 2009 |
| 7600534 |
Valve closing device |
Oct. 13, 2009 |
| 7600572 |
Drillable bridge plug |
Oct. 13, 2009 |
| 7597149 |
Safety valve with extension springs |
Oct. 6, 2009 |
| 7543651 |
Non-elastomer cement through tubing retrievable safety valve |
Jun. 9, 2009 |
| 7537062 |
Flapper valve and actuator |
May. 26, 2009 |
| 7533729 |
Reverse cementing float equipment |
May. 19, 2009 |
| 7530401 |
Tool trap assembly and method |
May. 12, 2009 |
| 7510010 |
System and method for cementing through a safety valve |
Mar. 31, 2009 |
| 7487829 |
Wellbore valve having linear magnetically geared valve actuator |
Feb. 10, 2009 |
| 7464763 |
Method of injecting lift gas and gas lift flow control device |
Dec. 16, 2008 |
| 7455116 |
Injection valve and method |
Nov. 25, 2008 |
| 7451809 |
Apparatus and methods for utilizing a downhole deployment valve |
Nov. 18, 2008 |
| 7431093 |
Protection scheme and method for deployment of artificial lift devices in a wellbore |
Oct. 7, 2008 |
| 7409996 |
Control system communication and lock open tool and method for locking open a safety valve and communicating with surface |
Aug. 12, 2008 |
| 7404446 |
Well tool protection system and method |
Jul. 29, 2008 |
| 7392849 |
Balance line safety valve with tubing pressure assist |
Jul. 1, 2008 |
| 7363980 |
Downhole flow control apparatus, operable via surface applied pressure |
Apr. 29, 2008 |
| 7360600 |
Subsurface safety valves and methods of use |
Apr. 22, 2008 |
| 7360602 |
Barrier orifice valve for gas lift |
Apr. 22, 2008 |
| 7357181 |
Apparatus for autofill deactivation of float equipment and method of reverse cementing |
Apr. 15, 2008 |
| 7350590 |
Instrumentation for a downhole deployment valve |
Apr. 1, 2008 |
| 7347270 |
Redundant hydraulic system for safety valve |
Mar. 25, 2008 |
| 7314091 |
Cement-through, tubing retrievable safety valve |
Jan. 1, 2008 |
| 7299880 |
Surge reduction bypass valve |
Nov. 27, 2007 |
| 7287596 |
Method and apparatus for stimulating hydrocarbon wells |
Oct. 30, 2007 |
| 7270191 |
Flapper opening mechanism |
Sep. 18, 2007 |
| 7267177 |
Tubing fill and testing valve |
Sep. 11, 2007 |
| 7255173 |
Instrumentation for a downhole deployment valve |
Aug. 14, 2007 |
| 7255174 |
Cement control ring |
Aug. 14, 2007 |
| 7255178 |
Drillable bridge plug |
Aug. 14, 2007 |
| 7252153 |
Bi-directional fluid loss device and method |
Aug. 7, 2007 |
| 7246668 |
Pressure actuated tubing safety valve |
Jul. 24, 2007 |
| 7231971 |
Downhole safety valve assembly having sensing capabilities |
Jun. 19, 2007 |
| 7231986 |
Well tool protection system and method |
Jun. 19, 2007 |
| 7213653 |
Deep set safety valve |
May. 8, 2007 |
| 7204313 |
Equalizing flapper for high slam rate applications |
Apr. 17, 2007 |
| 7178599 |
Subsurface safety valve |
Feb. 20, 2007 |
| 7178600 |
Apparatus and methods for utilizing a downhole deployment valve |
Feb. 20, 2007 |
| 7168492 |
Wellbore annulus flushing valve |
Jan. 30, 2007 |
| 7152688 |
Positioning tool with valved fluid diversion path and method |
Dec. 26, 2006 |
| 7063156 |
Tubing fill and testing valve |
Jun. 20, 2006 |
| 7021386 |
Safety valve having extension spring closure mechanism |
Apr. 4, 2006 |
| 6991040 |
Method and apparatus for locking out a subsurface safety valve |
Jan. 31, 2006 |
| 6988556 |
Deep set safety valve |
Jan. 24, 2006 |
| 6957703 |
Closure mechanism with integrated actuator for subsurface valves |
Oct. 25, 2005 |
| 6920930 |
Drop ball catcher apparatus |
Jul. 26, 2005 |
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