US Patent:
20090120689, May 14, 2009
Inventors:
Ralf Zaeper - Hannover, DE
John D. Macpherson - Spring TX, US
Mathias Menge - Bakersfield CA, US
Assignee:
BAKER HUGHES INCORPORATED - Houston TX
International Classification:
E21B 47/16
E21B 47/18
Abstract:
A system, tool and method of communicating data between a wellbore and the surface are provided that include the features of transmitting data from a number of tools in the wellbore to the surface at a first data rate via a communication link in a tubing that supplies fluid under pressure, detecting occurrence of a fault relating to the data communication link is below a threshold, and switching transmission of least some of the data from the tools by generating pressure pulses through the fluid in the tubing at a second data rate that is lower than the first data rate.