E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 44/00 (2006.01) E21B 47/00 (2006.01)
Patent
CA 2748857
A method of determining movement dynamics of a drillstring is provided that includes the steps of calculating or measuring a friction coefficient for the sliding contact between the drillstring and the sidewall of a borehole, the friction coefficient being a varying function of non-zero sliding velocities; and predicting movement dynamics of the drillstring using the measured friction coefficient.
L'invention concerne un procédé de détermination de la dynamique de déplacement d'un train de tiges de forage, consistant à calculer ou mesurer un coefficient de frottement pour le contact de glissement entre le train de tiges de forage et la paroi latérale d'un trou de forage, le coefficient de frottement étant variable en fonction de vitesses de glissement non nulles. Le procédé consiste également à prévoir la dynamique de déplacement du train de tiges de forage au moyen du coefficient de frottement mesuré.
Schlumberger Canada Limited
Smart & Biggar
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