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
System and method for configuring software applications in a motor vehicle
Catheter with multiple electrode assemblies for use at or near tubular regions of the heart
Performance venue with dynamic mechanical load management system and method
Machine shop including computer system that interfaces with different legacy servers
Imaging lens with three lens elements, and electronic apparatus having the same
Implantable neuro-stimulation electrode with fluid reservoir
Machine tool with an electrical generator for passive power generation
  Randomly Featured Patents
Security apparatus and method for a self-service fuel pumping station
Head rotation apparatus for video tape recorder
Device and a method for supplying conditioned air to an aircraft
Region sizing for macroblocks
Products with a fluidifying action for mineral pastes and binders
Pendant pull
Crosstalk mitigation method and system
Voice transmission system
Interlock system and image forming apparatus incorporating interlock system