2017SY/T 6268-2017 Recommended practices for selection of oil well pipes
2008SY/T 6268-2008 Recommended practice for selection and use of casing and tubing
1996SY/T 6268-1996 Recommended Practices for Selection of Tubing and Casing
SY/T 6268-2017 Recommended practices for selection of oil well pipes has been changed from SY/T 6288-2007 Practice for selection and use of drill pipe and drill collar.