Changbao can supply all kinds of fixed length pup joints with API connection (EU, NU, SC, LC, BC,etc) and Changbao premium connection or according to the requirements of customers individuation required. Based on oilfield required, pup joint can be processing with coupling, Pin*Pin pup joint, different connection of crossover, different OD crossover,etc.

Major Grade

Covering all Grades of API standard (H40, J55, K55, N80,C90, T95, P110, C110, Q125, L80),Changbao mill standard of anti-corrosion Grade, anti-collapse Grade.

Connection

CBS1 Connection: Changbao gas-tight premium connection Type 1 (tubing and casing),

CBS2 Connection: Changbao gas-tight premium connection Type 2 (tubing and casing);

CBS3 Connection: Changbao gas-tight premium connection Type 3 (tubing and casing)

CBSJ:Eeconomical low pressure sealed premium connection (tubing and casing),

CB-FJ: Changbao extreme line premium connection (tubing and casing),

EU-HT/BC-HT: High torque PA premium connection (tubing and casing)

standard（part）

Specification for Spec 5CT API casing and tubing

Specification for threading, gauging and thread inspection of casing, tubing and line pipe threads

Casing and tubing thread Connection test procedure for oil and gas industry