Invention Grant
US08167038B2 System and method for deflection compensation in power drive system for connection of tubulars 有权
用于连接管道的动力传动系统中的偏转补偿系统和方法

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