Low-alloy carbon steel drill pipes in the controlled yield strength grade 95 ksi showing excellent sulfide stress cracking (SSC) resistance and impact toughness have been developed. This paper describes the product, its manufacturing route, and the test program which was conducted to evaluate the mechanical properties and SSC resistance of the material in the different parts of the product.
Keywords • drill pipe, sour service, sulfide stress cracking, seamless tube, tool joint, friction weld. high strength low-alloy steels