Casing pup joint is a short section of casing. Compared with casing, it is only different in length and the others are the same.
Execution criteria: API Spec-5CT is performed by the tube body. Thread processing executes API Spec-5B.
Specifications for oil tubing: 2-3/8"- - 4-1/2", end processing form NUE, EUE, special connection.
Material:H40,J55,K55,N80,L80,C-90,C95,T95,P110,Q125,13Cr-80,13Cr-110, super 13Cr etc.