Research on Product Line Series Validation of OCTG Premium Connection

Described here in the essay are the concept and development of the product line series validation of the premium threaded connection.And the product line series is established by taking the TP-CQ premium connection as an example.Moreover,the finite element evaluation criterion and the interpolation/extrapolation method for the product line series validation are proposed.The analysis result shows that for the full-scale test products in high steel grade and with large wall thickness should be selected as far as possible,and for the performance of the products in low steel grade and with small wall thickness can be validated within the range of the product line so as to minimize the cost and save the resources.