Drilling, casing, tubing: the three phases of a wellbore

Exploring the Benefits of drilling, casing, and Tubing in wellbore construction understanding the different Types of Casing and Tubing Used in Wellbore Construction Tensile and Hardness Requirements grade     Yield Strength MPa Tensile Strength Hardness a,c Specified Wall thickness Allowable Hardness Variation b   Type Total Elongation Under Load   min MPa max  …

Exploring the Benefits of drilling, casing, and Tubing in wellbore construction

understanding the different Types of Casing and Tubing Used in Wellbore Construction

Tensile and Hardness Requirements
grade     Yield Strength MPa Tensile Strength Hardness a,c Specified Wall thickness Allowable Hardness Variation b
  Type Total Elongation Under Load   min MPa max    
      min max   HRC HBW mm HRC
1 2 3 4 5 6 7 8 9 10
H40 0.5 276 552 414
J55 0.5 379 552 517
K55 0.5 379 552 655
N80 1 0.5 552 758 689
N80 Q 0.5 552 758 689
R95 0.5 655 758 724
L80 L80 1 0.5 552 655 655 23 241
L80 9Cr 13Cr 0.5 552 655 655 23 241
    0.5 552 655 655 23 241
C90 1 0.5 621 724 689 25.4 255 £12.70 3
                12.71 to 19.04 4
                19.05 to 25.39 5
                ³ 25.40 6
T95 1 0.5 655 758 724 25.4 255 £12.70 3
                12.71 to 19.04 4
                19.05 to 25.39 5
                ³ 25.40 6
C110 0.7 758 828 793 30 286 £12.70 3
                12.71 to 19.04 4
                19.05 to 25.39 5
                ³ 25.40 6
P110 0.6 758 965 862
Q125 1 0.65 862 1034 931 b £12.70 3
                12.71 to 19.04 19.05 4
                  5
a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9.
c For through-wall hardness tests of grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number.

Similar Posts