Method for improving a drilling process by characterizing...

Details Method for improving a drilling process by characterizing... Method for improving a drilling process by characterizing...

E - Fixed Constructions

21

B

255/25

E21B 15/00 (2006.01) E21B 21/08 (2006.01) E21B 44/00 (2006.01) E21B 47/00 (2006.01) E21B 47/09 (2006.01) E21B 47/10 (2006.01)

Patent

CA 2010943

Abstract A variety of flow and pressure measurements are obtained to characterize the drilling fluids hydraulics system of the borehole drilling process. Notably, a differential pressure measurement which measures the difference between the pressure internal to and external of the drill bit is made close to the drill bit. From this and other measurements are obtained valuable information on whether a change in pressure drop is due to a leak or a lost bit nozzle, on corrections to the downhole weight on bit measurement, on the rate of rotation of a downhole positive displacement drilling motor, on the efficiency of the drilling motor, and on an indication of whether a leak in or a blockage of the drill string has occurred and its location.

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