Resources Contact Us Home
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
Systems and methods for providing a video playlist
Vectorization of program code
Acoustic echo cancellation
System and method for combining different tablets into a pouch
Data scrambling in memory devices
Compounds for the reduction of .beta.-amyloid production
Pre-primed roofing membrane
  Randomly Featured Patents
Apparatus and method to generate and collect diagnostic data
Vessel port configured for use with a glove bag
System and method for end-user custom parsing definitions
Microprocessor having index register coupled to serial-coupled address bus sections and to data bus
Communication system and time synchronization method
Automatic seat belt system
Method of spray coating using laser-energy beam
Method and system for enhancing a home page