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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Measurement-while-drilling assembly using real-time toolface oriented measurements. Kind code of ref document: Nuclear magnetic resonance logging with azimuthal resolution using gradient coils. Passive, active and semi-active cancellation of borehole effects for well logging.

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Sonic well tool couurs receiver array including an attenuation and delay apparatus. Structures and methods for damping tool waves particularly for acoustic logging tools. Determination of borehole azimuth and the azimuthal dependence of borehole parameters. Country of ref document: Diagaphie de mise en image de boue a base d’huiles qui mesure la phase et l’amplitude de tension.

Time and depth correction of MWD and wireline measurements using correlation of surface and downhole measurements. Methods of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications.

Gamma-gamma density measurement system for diagdaphie, high-temperature measurements. Method and apparatus for generating acoustic signal with single mode of propagation. Apparatus and method for microresistivity imaging in nonconductive drilling fluid. System, method and apparatus for downhole system having integrated measurement while operating components.


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Method for signal enhancement in azimuthal propagation resistivity while drilling.

Procede d’obtention d’une image bidimensionnelle developpee de la paroi d’un forage. EP EPB1 fr Method and apparatus for generating acoustic signals for LWD shear velocity measurement. Formation resistivity measurement while drilling, utilizing physical conditions representative ciagraphie the signals from a toroidal coil located adjacent the drilling bit. Coil assembly structure and mounting forming an annular chamber to be mounted and sealed on a drill collar.

Microresistivity anisotropy logging tool employing a monopole current injection electrode. Method and apparatus for correcting diagraaphie developed from a well tool disposed at a dip angle in a wellbore to eliminate the effects of the dip angle on the data.

5 cours & 10 sujets de sismologie I des études supérieures de géophysique

Induction log sonde feedpipe having a plurality of tubes arranged within it and windows to facilitate the passage of the conductors. Apparatus and method for minimizing wear and wear related measurement error in a logging-while-drilling tool. Inductive resistivity guard logging apparatus including toroidal coils mounted on a conductive stem.


Isotope-specific detection of low-density materials with laser-based monoenergetic gamma-rays. Induction logging sonde with metallic support having a coaxial insulating sleeve member.

US USB2 en Electromagnetic power and communication link particularly adapted for drill collar mounted sensor systems. US USB2 en Borehole image reconstruction using inversion and tool spatial sensitivity functions.

DE DET2 de Well logging method and apparatus using a continuous energy spectrum photon diiagraphie. A2 Diagraohie state s: Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction.

CA CAC fr Logging tool employing a monopole current injection electrode for microresistivity imaging. Well logging apparatus having a removable sleeve for sealing and protecting multiple antenna arrays. Method and apparatus for optimizing the reception pattern of the antenna of a propagating electromagnetic wave logging tool.

Ref legal event code: Method and apparatus using pad carrying electrodes for electrically investigating a borehole. Apparatus and method for generating sector residence time images of downhole tools. Making directional measurements using a rotating and non-rotating drilling apparatus. Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations.

Acoustic logging-while-drilling tools having dixgraphie hexapole source configuration and associated logging methods. Borehole apparatus and methods for measuring formation velocities as a function of azimuth, and interpretation thereof.

Subsurface borehole evaluation and downhole tool position determination methods. US USB2 en