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
Semiconductor device
Subpixel-based image down-sampling
Carrier or transport strip
Handheld electronic communication device having sliding display
Light emitting element, method for manufacturing the light emitting element, optical element and method for manufacturing the optical element
Upstream channel bonding in a cable communications system
Buckle (tube)
  Randomly Featured Patents
Dispensing mechanism for vending machines
Safety identification device
Tilt steering column lock
Schottky diode on a silicon carbide substrate
Agglomeration process utilizing emulsion
EMI shielding composites
Stand speed reference circuit for a continuous tandem rolling mill
Method and apparatus for determining the polarization properties of light emitted, reflected or transmitted by a material using a laser scanning microscope
Vehicle ventilator
Method of microarea analysis with a focused cesium ion beam