Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or wellbore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place.
Size: 4-1/2"~20"
Steel grade: J55, K55, N80, L80, P110, Q125
Thread Type: LTC, STC, BC
Production Standard: API SPEC 5CT\API SPEC 5B
Quality Control: ISO9001