Method and apparatus for measuring mud resistivity

Details Method and apparatus for measuring mud resistivity Method and apparatus for measuring mud resistivity

G - Physics

01

V

G01V 3/26 (2006.01) E21B 49/00 (2006.01)

Patent

CA 2521456

A sensor for measuring mud resistivity in a borehole includes a transmitter having a magnetic moment in a first direction; and a receiver having a magnetic moment in a second direction, wherein the first direction and the second direction are substantially different, wherein the transmitter and the receiver are disposed in an insulating collar of a downhole tool, and wherein the transmitter is disposed at a selected distance no more than 10 inches from the receiver along a longitudinal axis of the downhole tool.

Un capteur servant à mesurer la résistivité des boues dans un trou de forage comprend un émetteur possédant un moment magnétique dans une première direction, et un récepteur possédant un moment magnétique dans une deuxième direction, et dans lequel la première direction est substantiellement différente de la deuxième direction, dans lequel l'émetteur et le récepteur sont placés dans une bague isolante d'un outil de fond de trou, et dans lequel l'émetteur est éloigné du récepteur d'une distance choisie d'au plus 10 pouces le long de l'axe longitudinal de l'outil de fond de trou.

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