Method and system to model, measure, recalibrate, and...

E - Fixed Constructions – 21 – B

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E21B 44/00 (2006.01) E21B 47/02 (2006.01) E21B 49/00 (2006.01)

Patent

CA 2558430

Methods and systems for controlling the frilling of a borehole are disclosed. The methods employ the assumption that nonlinear problems can be modeled using linear equations for a local region. Common filters can be used to determine the coefficients for the linear equation. Results from the calculations can be used to modify the drilling path for the borehole. Although the calculation/modification process can be done continuously, it is better to perform the process at discrete intervals along the borehole in order to maximize drilling efficiency.

L'invention concerne des procédés et des systèmes destinés à commander le forage d'un puits. Les procédés font intervenir une supposition selon laquelle les problèmes non linéaires peuvent être modélisés au moyen d'équations linéaires pour une zone locale. Des filtres classiques peuvent être utilisés pour déterminer les coefficients pour l'équation linéaire. Les résultats issus de ces calculs peuvent être utilisés pour modifier la trajectoire de forage pour le puits. Même si l'opération de calcul/modification peut être réalisée de manière continue, il est préférable de la réaliser à des intervalles discrets le long du puits en vue d'une maximisation de l'efficacité de forage.

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