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
Efficient implementation of hash algorithm on a processor
Method of allocating IP address of image forming apparatus using DHCP, image forming apparatus and system of allocating IP address using DHCP
Output circuit
Polarization preserving front projection screen microstructures
LED illumination control using a simple digital command structure
Polymer compositions and nonwoven compositions prepared therefrom
Methods and kits for predicting the responsiveness of hepatocellular carcinoma patients to 5-fluorouracil-based combination chemotherapy
  Randomly Featured Patents
Human immunodeficiency virus type 2 (HIV-2) polypeptides and methods of producing them
Protein-polymer conjugates
Data pen
Computerized method and system for managing the exchange and distribution of confidential documents
Product pusher for merchandise displays
Implantable lead
Barbecue grill
Data path processing information included in the pseudowire layer of packets
System and method for a generalized packet header suppression mechanism
Register-stack apparatus