Method and apparatuses for measuring the resistivity of mud...

Details Method and apparatuses for measuring the resistivity of mud... Method and apparatuses for measuring the resistivity of mud...

G - Physics

01

V

G01V 3/20 (2006.01)

Patent

CA 2188225

The invention relates to a method of measuring the resistivity of a drilling mud by means of a sonde provided with an annular current electrode (A o) and with annular guard electrodes (A, A'), current I o being emitted into the surrounding formation together with focusing currents I and I'. A signal representative of R m is produced in response to I o. Various apparatuses for implementing the method are described. Another method implements a technique of computed focusing. Corresponding apparatuses are also described.

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