Method of controlling the direction of a drill bit in a...

Details Method of controlling the direction of a drill bit in a... Method of controlling the direction of a drill bit in a...

E - Fixed Constructions

21

B

341/97

E21B 44/00 (2006.01) E21B 7/04 (2006.01) E21B 47/022 (2006.01) G05D 3/12 (2006.01) G09B 25/02 (2006.01)

Patent

CA 1312937

-11- Abstract of the Disclosure A system for controlling the direction of a drill bit in a borehole utilizes both a drill string model and a bit-rock interaction model to compare ideal predicted or expected mo- ments with real time measured moments to arrive at correction data necessary to return the bit to its desired path. The magnitude and direction of moments generated near the bit are measured in a downhole equipment sub, containing a micro- processor and memory, so that the real time data can be collected and acted upon without undue delay thereby minimizing drilling time lost due to deviations from the desired path.

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