The meaning of each part of the screw-on curve,the definition of shoulder torque,and the common characteristics of the screw-on curve are introduced.Moreover,the principle and shortcomings of the commonly used method ...
The wear mechanism and tool life of four types of oil country tubular goods chasers are studied herein via metallographic microscopy,scanning electron microscopy,and energy dispersive spectroscopy.Results show that wh...
The causes to the outer surface folding defects in N80-Q oil country tubular goods (OCTG) were investigated through the observation of the defects' morphology, microstructure and the analysis of the chemical compos...
The mechanical and corrosion performance of low alloy steel tubular goods depends on the microstructure obtained as a result of the combination of alloying elements and manufacturing process parameters. The basic desi...
With an alloy content as high as 80%or more,Ni-based OCTG is a strategic products related to the state energy security,mainly applied in the exploitation and development of sour gas fields with complicate geological f...