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Class Information
Number: 367/83
Name: Communications, electrical: acoustic wave systems and devices > Wellbore telemetering > Through well fluids
Description: Subject matter wherein the medium is a liquid.










Sub-classes under this class:

Class Number Class Name Patents
367/85 Linear valve control 81
367/84 Rotary valve control 67


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8693284 Apparatus for creating pressure pulses in the fluid of a bore hole Apr. 8, 2014
8634274 Spindle for mud pulse telemetry applications Jan. 21, 2014
8629782 System and method for using dual telemetry Jan. 14, 2014
8576659 Method and apparatus for acoustic impedance and P-wave anisotropy measurements Nov. 5, 2013
8570833 Downlinking communication system and method Oct. 29, 2013
8547245 System and method for downhole telemetry Oct. 1, 2013
8534381 High LCM positive pulse MWD component Sep. 17, 2013
8514657 Generating fluid telemetry Aug. 20, 2013
8511388 Devices and methods for transmitting EDS back-up signals to subsea pods Aug. 20, 2013
8467268 Pressure release encoding system for communicating downhole information through a wellbore to a surface location Jun. 18, 2013
8369667 Downhole cable Feb. 5, 2013
8258975 Communication system for communication with and remote activation of downhole tools and devices used in association with wells for production of hydrocarbons Sep. 4, 2012
8203908 Intelligent efficient servo-actuator for a downhole pulser Jun. 19, 2012
8174929 Spindle for mud pulse telemetry applications May. 8, 2012
8169854 System and method for wireless data transmission May. 1, 2012
8154420 System and method for downhole telemetry Apr. 10, 2012
8138943 Measurement while drilling pulser with turbine power generation unit Mar. 20, 2012
8111171 Wellbore telemetry and noise cancellation systems and methods for the same Feb. 7, 2012
8095320 Method, program product, and system for suppression of residual water bottom energy in surface seismic data Jan. 10, 2012
8078328 System, program product, and related methods for performing automated real-time reservoir pressure estimation enabling optimized injection and production strategies Dec. 13, 2011
8022840 Telemetry transmitter optimization using time domain reflectometry Sep. 20, 2011
8013756 Estimation of properties of mud Sep. 6, 2011
8009511 Pressure waves decoupling with two transducers Aug. 30, 2011
8004421 Wellbore telemetry and noise cancellation systems and method for the same Aug. 23, 2011
7994932 Borehole telemetry system Aug. 9, 2011
7990282 Borehole telemetry system Aug. 2, 2011
7983113 Method and apparatus for downlink communication using dynamic threshold values for detecting transmitted signals Jul. 19, 2011
7940192 Channel equalization for mud-pulse telemetry May. 10, 2011
7894302 Drilling system comprising a plurality of borehole telemetry systems Feb. 22, 2011
7881155 Pressure release encoding system for communicating downhole information through a wellbore to a surface location Feb. 1, 2011
7834777 Downhole power source Nov. 16, 2010
7835226 Communications and power harvesting system for in-pipe wireless sensor networks Nov. 16, 2010
7830749 Method of filtering pump noise Nov. 9, 2010
7823689 Closed-loop downhole resonant source Nov. 2, 2010
7817061 Telemetry transmitter optimization using time domain reflectometry Oct. 19, 2010
7805247 System and methods for well data compression Sep. 28, 2010
7768423 Telemetry transmitter optimization via inferred measured depth Aug. 3, 2010
7613543 Electronic demarcating system Nov. 3, 2009
7573397 System and method for downhole telemetry Aug. 11, 2009
7540337 Adaptive apparatus, system and method for communicating with a downhole device Jun. 2, 2009
7518528 Electric field communication for short range data transmission in a borehole Apr. 14, 2009
7518950 Method and apparatus for downlink communication Apr. 14, 2009
7489591 Drilling fluid pressure pulse detection using a differential transducer Feb. 10, 2009
7480207 Filtering and detection of telemetry Jan. 20, 2009
7468679 Method and apparatus for mud pulse telemetry Dec. 23, 2008
7460438 Downhole data communication Dec. 2, 2008
7453372 Identification of the channel frequency response using chirps and stepped frequencies Nov. 18, 2008
7430153 Downhole tool and method Sep. 30, 2008
7423932 Well bore communication pulser Sep. 9, 2008
7423931 Acoustic system for communication in pipelines Sep. 9, 2008

1 2 3 4 5










 
 
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