· Precautions in use of drill pipe [2019-11-19 HITS：4]
Precautions in use of drill pipe [READ]

· The connection method of oil casing pipe [2019-11-18 HITS：5]
The connection method of oil casing pipe [READ]

· The role of thread oil well casing pipe [2019-11-15 HITS：13]
The role of thread oil well casing pipe [READ]

· Different types of casing pipe used in the process of oil production [2019-11-13 HITS：14]
Different types of casing pipe used in the process of oil production [READ]

· Technology of Seamless Casing Pipe Production [2019-03-04 HITS：6]
Technology of Seamless Oil Casing Pipe Production [READ]

· Development status of drill pipe [2018-03-05 HITS：9]
Development status of drill pipe [READ]