L’invention concerne un procédé et un dispositif de diagraphie en cours de forage permettant d’obtenir des informations concernant une formation. Le dispositif. Title, Cours de diagraphies instantanées: par R. Desbrandes Author, Robert Desbrandes. Editor, École nationale supérieure du pétrole et des moteurs a. L’invention concerne un procédé et un dispositif de diagraphie en cours de forage permettant d’obtenir des informations concernant une.

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System, method and apparatus for petrophysical and geophysical measurements at the drilling bit. Methods for processing sequential data to identify possible peak points and to estimate peak to noise ratio of sequential data.

Kind code of ref document: Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole. Time and depth correction of MWD and wireline measurements using correlation of surface and downhole measurements.

Kind code of ref document: Coil assembly structure diagdaphie mounting forming an annular chamber to be mounted and sealed on a drill collar. Logging system for measuring dielectric properties of fluids in a cased well using multiple mini-wave guides. Bit based formation evaluation and drill bit and drill string analysis using an acoustic sensor.


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Induction log sonde feedpipe having a plurality of tubes arranged within it and windows to facilitate the passage of the conductors. CA CAC fr Electromagnetic power and communication link particularly adapted for drill collar mounted sensor systems. Simultaneous gamma ray measurement of formation bulk density and casing thickness. Method and apparatus for safely siagraphie radiation generators in while-drilling and while-tripping applications.

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