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
Systems and methods for real-time catalyst particle size control in a polymerization reactor
Gesture based edit mode
Bulk message identification
Information processing apparatus, information processing method, data management server and data synchronization system
Method of manufacturing of a semi-conductor element and semi-conductor element
Image searching by approximate .kappa.-NN graph
Digital signal processing circuit for generating output signal according to non-overlapping clock signals and input bit streams and related wireless communication transmitters
  Randomly Featured Patents
Refrigerator with ceiling mounted water system
Boundary representation solid modeling system
Stamping tool, casting mold and methods for structuring a surface of a work piece
Method for determining the existence of a mutation
Method, system and computer program product for displaying a version of a paper
Sweeper chain support system
Carpet installation tool
LED lamp with heat dissipation mechanism and multiple light emitting faces
Apparatus for electronic exchange having a general-purpose bus separating the exchange unit and control unit
Modular polynucleotides for ligand-controlled regulatory systems