E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/24 (2006.01) E21B 7/04 (2006.01) E21B 28/00 (2006.01)
Patent
CA 2760262
A method of conducting borehole operations using a system including an elongate tubular conveyance that is moved through the borehole, the method comprising imposing a torsional vibration at a predetermined frequency on the tubular conveyance as it is moved through the borehole: wherein the predetermined frequency is obtained by determining the frequency-dependent mobility of the system based on the relationship between rotational velocity and torque for the system; and imposing torsional vibrations at a frequency where the relationship is optimised.
L'invention porte sur un procédé pour effectuer des opérations de trou de forage à l'aide d'un système qui comprend un moyen de transport tubulaire allongé qui est déplacé à travers le trou de forage, le procédé comportant l'application d'une vibration de torsion à une fréquence prédéterminée sur le moyen de transport tubulaire alors qu'il est déplacé à travers le trou de forage; la fréquence prédéterminée étant obtenue en déterminant la mobilité dépendant de la fréquence du système en fonction de la relation entre la vitesse de rotation et le couple pour le système, et l'application de vibrations de torsion à une fréquence à laquelle la relation est optimisée.
Stewart Bruce
Stulemeijer Ivo
Worrall Bob
Dynamic Dinosaurs Bv
Moffat & Co.
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