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
Golf club cover
Managing a spinlock indicative of exclusive access to a system resource
Metal-containing compositions and method of making same
Sealing member for piezoelectric resonator device, and piezoelectric resonator device
System and method for redirected firewall discovery in a network environment
Spreading technique applied to broadband mobile communications by satelite relying on DVB-RCS
Liquid-level sensor
  Randomly Featured Patents
Livestock security tag assembly
Electron microscope system and method for evaluating film thickness reduction of resist patterns
Vane for a gas turbine engine
Insert card packaging product
Support arm assembly for a folding top of a vehicle
Method of making internally slitted strip material
Method and system for scaling network traffic managers using connection keys
Active shielding device based on SQUID and feedback therefrom for the reduction of environmental magnetic noise
System and method for presenting information to passengers in conveyance
Liquid crystal display and backlight heater