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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:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8701781 Subsurface safety valve flapper Apr. 22, 2014
8701782 Subsurface safety valve with metal seal Apr. 22, 2014
8689885 Bi-directional flapper/sealing mechanism and technique Apr. 8, 2014
8689893 Check valve Apr. 8, 2014
8671974 Flow-actuated actuator and method Mar. 18, 2014
8662187 Permanent magnet linear motor actuated safety valve and method Mar. 4, 2014
8651188 Gas lift barrier valve Feb. 18, 2014
8646531 Tubular actuator, system and method Feb. 11, 2014
8607811 Injection valve with indexing mechanism Dec. 17, 2013
8607876 Flapper valve Dec. 17, 2013
8573304 Eccentric safety valve Nov. 5, 2013
8555988 Low equivalent circulation density setting tool Oct. 15, 2013
8544549 Downhole deployment valves Oct. 1, 2013
8534362 Downhole deployment valves Sep. 17, 2013
8522878 Downhole deployment valves Sep. 3, 2013
8511374 Electrically actuated insert safety valve Aug. 20, 2013
8490687 Safety valve with provisions for powering an insert safety valve Jul. 23, 2013
8479826 Protection of a safety valve in a subterranean well Jul. 9, 2013
8464799 Control system for a surface controlled subsurface safety valve Jun. 18, 2013
8453746 Well tools with actuators utilizing swellable materials Jun. 4, 2013
8439118 Pressure vortex device to allow flapper closure in high velocity fluid applications May. 14, 2013
8424611 Downhole safety valve having flapper and protected opening procedure Apr. 23, 2013
8397823 Tubular actuator, system and method Mar. 19, 2013
8353353 Surface controlled subsurface safety valve assembly with primary and secondary valves Jan. 15, 2013
8342247 Safety valve having mono spring closure mechanism Jan. 1, 2013
8286710 Valve assembly Oct. 16, 2012
8276676 Pressure-activated valve for hybrid coiled tubing jointed tubing tool string Oct. 2, 2012
8261836 Downhole deployment valves Sep. 11, 2012
8220534 Safety device for an oil well and associated safety installation Jul. 17, 2012
8205637 Flow-actuated actuator and method Jun. 26, 2012
8201633 Switchable circulating tool Jun. 19, 2012
8191570 Bi-directional flapper valve Jun. 5, 2012
8191634 Magnetic flapper shock absorber Jun. 5, 2012
8157012 Downhole sliding sleeve combination tool Apr. 17, 2012
8151889 System and method for controlling flow in a wellbore Apr. 10, 2012
8122976 Valve, core sampling apparatus and method Feb. 28, 2012
8118088 Shear activated safety valve system Feb. 21, 2012
8104505 Two-way actuator and method Jan. 31, 2012
8100181 Surface controlled subsurface safety valve having integral pack-off Jan. 24, 2012
8056618 Flapper mounted equalizer valve for subsurface safety valves Nov. 15, 2011
8047293 Flow-actuated actuator and method Nov. 1, 2011
8047294 Dual flapper safety valve Nov. 1, 2011
8006753 Hydraulic connector apparatuses and methods of use with downhole tubulars Aug. 30, 2011
8006772 Multi-cycle isolation valve and mechanical barrier Aug. 30, 2011
8002040 System and method for controlling flow in a wellbore Aug. 23, 2011
8002042 Actuatable subsurface safety valve and method Aug. 23, 2011
7971652 Linear actuation system in the form of a ring Jul. 5, 2011
7971651 Shape memory alloy actuation Jul. 5, 2011
7967074 Electric wireline insert safety valve Jun. 28, 2011
7963342 Downhole isolation valve and methods for use Jun. 21, 2011

1 2 3 4 5










 
 
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