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Patent
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G01V 1/40 (2006.01) E21B 44/00 (2006.01) E21B 47/00 (2006.01) E21B 47/024 (2006.01) E21B 47/18 (2006.01) G01C 9/14 (2006.01)
Patent
CA 1145538
ABSTRACT OF THE INVENTION A measurement system detects a downhole drilling vari- able in relation to the rotational orientation of a drill string during drilling. The system includes a downhole reference signal generator and a downhole variable signal generator. The reference signal generator is coupled down- hole to the drill string for generating a downhole reference (DR) signal indicative of the angular relationship between the drill string and a directional reference, such as gravity or the earth's magnetic field. The downhole variable signal generator detects downhole parameters and generates a down- hole variable (DV) signal representative of a downhole param- eter of interest during drilling. The DV signal and the DR signals are thereupon processed, either downhole or uphole depending in part on the telemetry system employed. The system is especially adapted for indicating the resultant lateral force applied to the drill string at the drill bit during drilling which is useful in projecting the probable drilling direction. Applicant: Denis Tanguy Title of Invention: System and Method for Monitoring Drill String Characteristics During Drilling
349652
Schlumberger Canada Limited
Smart & Biggar
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