LRFD Derived Performance of a Qualified API Connection Population

Tubular products are among the most critical items in a well, and the threaded connection can represent one of the more complicated and limiting mechanical features for tubular products. Previous tubular design methodology did not specifically address threaded connections, rather it applied safety factors to pipe body ratings. In contrast, Load and Resistance Factor Design (LRFD) methods specifically, address connection performance. This work is a discussion of how the limit performance is being defined and quality systems are being revised for API connections in accordance with the objectives of the LRFD method for OCTG.