Method and apparatus for computing drill bit vibration power...

Details Method and apparatus for computing drill bit vibration power... Method and apparatus for computing drill bit vibration power...

G - Physics

01

V

G01V 1/42 (2006.01)

Patent

CA 2333238

A power spectrum density processor is located near the drill bit while drilling. The power spectral density processor computes the power spectral density of the vibrations generated by the drill bit while drilling. The power spectral density information is telemetered to the surface. A drill string transfer function is estimated using the drill bit power spectral density, derived from the vibrations of the drill string, measured substantially at the surface, to enhance drill bit seismic techniques.

L'invention concerne un processeur de densité spectrale de puissance qu'on place à proximité du trépan pendant le forage. Le processeur de densité spectrale calcule la densité spectrale de puissance des vibrations générées par le trépan pendant le forage. Cette information concernant la densité spectrale de puissance est transmise à la surface par télémesure. On évalue une fonction de transfert pour le train de sonde au moyen de la densité spectrale de puissance du trépan dérivée des vibrations du train de sonde mesurées principalement à la surface ce qui permet d'améliorer les techniques sismiques à trépans.

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