Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore.  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. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 psi. 

Standard

API SPEC 5CT

Grade

H40, J55, K55, N80-1, N80-Q, M65, L 80-1, L80-9Cr, L 80-13Cr, C90-1, T95, P110, Q125 etc.

Size

OD: 114.3 - 508mm (4-1/2 "- 20")

WT: 5.21 - 16. 13mm (9.5 PPF to 133PPF)

Length: R1, R2, R3

Process Type: Seamless (SMLS), Electric Resistance Welded (ERW)

Thread types: STC, LTC, BTC, Premium connection, XC, VAM TOP, NEW VAM

More Casing Pipes and Their Colors,