The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2011
Filed:
Jun. 29, 2007
Sven Krueger, Niedersachsen, DE;
Thomas Kelch, Niedersachen, DE;
Joachim Treviranus, Winsen/Aller, DE;
Henning Doerge, Bodendorf, DE;
Marc Kurella, Niedersachsen, DE;
Sven Krueger, Niedersachsen, DE;
Thomas Kelch, Niedersachen, DE;
Joachim Treviranus, Winsen/Aller, DE;
Henning Doerge, Bodendorf, DE;
Marc Kurella, Niedersachsen, DE;
Baker Hughes Incorporated, Houston, TX (US);
Abstract
The present invention provides a method and system in which signals from the surface are sent by changing flow rate of the drilling fluid supplied to the drill string during drilling of a wellbore. The signals are sent based on a fixed or dynamic time period schemes so that the sent signals cross a dynamic threshold value in a known manner. A controller downhole sets the dynamic threshold and determines the number of times a parameter, such as voltage, relating to the changes in the flow rate crosses the set dynamic threshold. Based on the number of the number of crossings and/or the number of crossings and the timing of such crossings, the controller ascertains the signal sent from the surface for use downhole.