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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 7518950 |
Method and apparatus for downlink communication |
Apr. 14, 2009 |
| 7518528 |
Electric field communication for short range data transmission in a borehole |
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 |
| 7423931 |
Acoustic system for communication in pipelines |
Sep. 9, 2008 |
| 7423550 |
Two sensor impedance estimation for uplink telemetry signals |
Sep. 9, 2008 |
| 7423932 |
Well bore communication pulser |
Sep. 9, 2008 |
| 7417920 |
Reciprocating pulser for mud pulse telemetry |
Aug. 26, 2008 |
| 7408837 |
Measurement while drilling tool and method |
Aug. 5, 2008 |
| 7400262 |
Apparatus and methods for self-powered communication and sensor network |
Jul. 15, 2008 |
| 7397388 |
Borehold telemetry system |
Jul. 8, 2008 |
| 7382686 |
Drilling signalling system |
Jun. 3, 2008 |
| 7345594 |
Noise attenuation apparatus for borehole telemetry |
Mar. 18, 2008 |
| 7330397 |
Electromagnetic anti-jam telemetry tool |
Feb. 12, 2008 |
| 7327634 |
Rotary pulser for transmitting information to the surface from a drill string down hole in a well |
Feb. 5, 2008 |
| 7320370 |
Automatic downlink system |
Jan. 22, 2008 |
| 7319638 |
Hydraulic oscillator for use in a transmitter valve |
Jan. 15, 2008 |
| 7313052 |
System and methods of communicating over noisy communication channels |
Dec. 25, 2007 |
| 7295491 |
High impact communication and control system |
Nov. 13, 2007 |
| 7250873 |
Downlink pulser for mud pulse telemetry |
Jul. 31, 2007 |
| 7230880 |
Rotational pulsation system and method for communicating |
Jun. 12, 2007 |
| 7201231 |
Apparatuses and methods for deploying logging tools and signalling in boreholes |
Apr. 10, 2007 |
| 7167101 |
Method and apparatus for telemetry |
Jan. 23, 2007 |
| 7145834 |
Well bore communication pulser |
Dec. 5, 2006 |
| 7138929 |
Method and apparatus for enhanced acoustic mud pulse telemetry during underbalanced drilling |
Nov. 21, 2006 |
| 7133325 |
Apparatus and method for generating electrical power in a borehole |
Nov. 7, 2006 |
| 7123161 |
Method and apparatus enhanced acoustic mud pulse telemetry |
Oct. 17, 2006 |
| 7082078 |
Magnetorheological fluid controlled mud pulser |
Jul. 25, 2006 |
| 7068182 |
Method and apparatus for mud pulse telemetry |
Jun. 27, 2006 |
| 7061830 |
Transducers coated with anechoic material for use in down hole communications |
Jun. 13, 2006 |
| 7057524 |
Pressure pulse generator for MWD |
Jun. 6, 2006 |
| 6963290 |
Data recovery for pulse telemetry using pulse position modulation |
Nov. 8, 2005 |
| 6958703 |
Drill string enabling information to be transmitted |
Oct. 25, 2005 |
| 6952170 |
Hollow drilling rod for transmitting information |
Oct. 4, 2005 |
| 6920085 |
Downlink telemetry system |
Jul. 19, 2005 |
| 6909667 |
Dual channel downhole telemetry |
Jun. 21, 2005 |
| 6898150 |
Hydraulically balanced reciprocating pulser valve for mud pulse telemetry |
May. 24, 2005 |
| 6867706 |
Frequency regulation of an oscillator for use in MWD transmission |
Mar. 15, 2005 |
| 6850463 |
Borehole logging apparatus for deep well drilling |
Feb. 1, 2005 |
| 6795373 |
Permanent downhole resonant source |
Sep. 21, 2004 |
| RE38567 |
Apparatus and method for self adjusting downlink signal communication |
Aug. 24, 2004 |
| 6760275 |
High impact communication and control system |
Jul. 6, 2004 |
| 6757218 |
Semi-passive two way borehole communication apparatus and method |
Jun. 29, 2004 |
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