Weatherford/lamb, Inc.

John Newman

Graham Myles Ruark

David Michael Haugen

David Shahin

Thomas H Koithan

Aaron Dauphine

Doyle Boutwell

Jen C Lin

Gary H Bray

Ali Unal

Julien Boselli

Gavin Wyatt-Mair

David Tomes

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.

System and method for deflection compensation in power drive system for connection of tubulars

A method and apparatus for connecting threaded members while ensuring that a proper connection is made. In one embodiment, the applied torque and/or rotation are measured at regular intervals throughout a pipe connection makeup. When a shoulder contact is detected, a predetermined torque value and/or rotation value is added to the measured torque and/or rotation values, respectively, at shoulder contact and rotation continued until this calculated value(s) is reached.

Methods and apparatus for applying torque and rotation to connections

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Winnsboro, LA, United States of America

John Newman