Loading patent…
AssigneeBaker Hughes Incorporated
InventorsRoland E. Chemali, Paul Pastusek, Friedhelm Makohl, Rene N. Ritter, Martin Townley Evans, Stanley T. Hewitt
Estimating the term…
A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses an electrode for injecting current into the earth formation and an electrode for obtaining a responsive signal from the borehole. The electrodes are located on the drill bit arm or blade. Measured resistivity values are obtained at the location of the drill bit. Measurements can be taken in both oil-based mud and water-based mud environments. Maximum or minimum resistivity can be used to best represent the resistivity of the surrounding formation.
An apparatus for making measurements of a parameter of interest of an earth formation during the drilling of a borehole therein, the apparatus comprising:
A method determining a resistivity of an earth formation during the drilling of a borehole, the method comprising:
Dependencies are inferred from the claim text.