Casing serves as the wellbore wall in oil and gas wells.
Diameter: Ф2-3/4 inch~Ф20inch
Wall thickness: 4mm~20mm.
Length： R1/R2/R3
API SPEC 5CT
API SPEC 5B
ISO11960
J55、K55、N80、L80
C90、T95、P110、Q125
