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
Format for providing traffic information and a method and apparatus for using the format
Lead frame array package with flip chip die attach
Laser protection polymeric materials
Restarting event and alert analysis after a shutdown in a distributed processing system
Semiconductor integrated circuit
Plastic floor-wall transition methods, materials, and apparatus
Methods for predicting cardiac toxicity
  Randomly Featured Patents
Straightening apparatus
Robotic surgical system for laparoscopic surgery
Picking device for the picking motion of a loom
Trousers including elastic inner panels for flattening pleats
Mounting for water irrigation device
Electric oven
Method and apparatus for safety for presses
Pipelined data processor capable of performing instruction fetch stages of a plurality of instructions simultaneously
Processes for purifying phosphoric acid and for preparing phosphoric acid
Display panel driving method and display apparatus