Patent ID: 8965703
Filing Date: 2015-02-24
Classification: E21B

Abstract:
1. A method of operating a well-site drilling system including a drill bit and fluid sensors, the method comprising: positioning the fluid sensors in a wellbore of a formation; obtaining downhole drilling fluid measurements using the sensors as a function of time or as a function of depth; correlating a change in the downhole drilling fluid measurements to a feature of the formation penetrated by the drill bit or to a feature of fluids in the formation wherein the feature is used in controlling a drilling process including monitoring a hole-cleaning process, wherein an average cuttings load is measured in a non-horizontal section of a wellbore, and the movement of cuttings is tracked from a horizontal section of the wellbore to the non-horizontal section of the wellbore using the measured average cuttings load and the downhole drilling fluid measurements.