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
High safety vehicular transportation system and operational method thereof
Optimized control of an energy supplying system and an energy consuming system
Blow moulding machine with compressed air recycling
.beta.-2 microglobulin as a biomarker for peripheral artery disease
Flexible circuit routing
Configurable logic cells
Method of treating cancer using a survivin inhibitor
  Randomly Featured Patents
Therapeutic-substance carrying/administering appliance
Method of encapsulating a wafer level microdevice
Snowmobile air box assembly
Emulsion adhesive composition and process for production thereof
Method of and apparatus for radio-frequency generation in resonator tank circuits excited by sequential pulses of alternately opposite polarity
Literature holder
Imidazole thione additives for lubricants
Preparation of substituted guanidines
Textured protein product and process
High toughness silicon nitride sintered body and process for producing the same