Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Wellbore telemetry and noise cancellation systems and method for the same










Image Number 4 for United States Patent #8004421.

A method of signal processing includes providing at least a first pressure sensor and a second pressure sensor spaced in a drilling system and using an algorithm to separate the downwardly propagating waves from the upwardly propagating waves. In one or more examples, an algorithm may include determining a velocity of pressure signals in a wellbore, time-shifting and stacking pressure signals from at least the first pressure sensor and the second pressure sensor to determine a downwardly propagating noise signal, and subtracting the downwardly propagating noise signal from at least the signal from the first pressure sensor.








 
 
  Recently Added Patents
Mobile communication device
Pet carrier
Methods and apparatus for mitigating interference between co-located collaborating radios
Interleaving charge pumps for programmable memories
Cineole
Permitting access of slave device from master device based on process ID's
Cycloalkylamine substituted isoquinoline derivatives
  Randomly Featured Patents
Brushless electric micromotor
Means for fixing a gore to ribs of a large umbrella
Correction of non-uniform sensitivity in an image array
Voltage tolerant input/output circuit
Spark leakage shutoff protective device for plug
Analytical apparatus with coded elements
Wet cleans for cobalt disilicide processing
Impact-resistant thermoplastic polyester urethanes
Lawn mower blade retainer
Non-destructive element splitting using location-based construction planning models