System and method for deflection compensation in power drive...

E - Fixed Constructions – 21 – B

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E21B 19/16 (2006.01) E21B 41/00 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2573670

The present invention generally provides methods and apparatus for connecting threaded members while ensuring that a proper connection is made, particularly for premium grade connections. In one embodiment, a method of connecting threaded tubular members for use in a wellbore or a riser system is provided. The method includes the acts of operating a power drive unit, thereby rotating a first threaded tubular member relative to a second threaded tubular member; measuring the rotation of the first threaded tubular member; and compensating the rotation measurement by subtracting a deflection of at least one of: the power drive unit, and one of the tubular members.

La présent invention fournit généralement des méthodes et des appareils permettant le raccord d'éléments filetés tout en assurant qu'un raccord approprié est effectué, en particulier pour les raccords de qualité supérieure. Dans une réalisation, une méthode porte sur le raccordement d'éléments tubulaires filetés pour utilisation dans un puits ou ans un tube ascenseur. La méthode comprend les actions d'exploitation d'une unité d'entraînement de puissance, faisant tourner ainsi un premier élément tubulaire fileté autour d'une deuxième élément tubulaire fileté; la mesure de la rotation du premier élément tubulaire fileté ; et la compensation de la mesure de rotation en soustrayant une déflexion d'au moins une unité d'entraînement de puissance et d'un des éléments tubulaires.

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