R95 API 5CT Casing

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Description

What is  API 5CT R95 casing Tubing?

API 5CT R95 Casing Tubing serves to transport both crude Oil and natural gas from oil and gas layer to the surface Pipeline after drilling is completed. It is able to bear the pressure produced by the exploitation process. After the outer surface is coated with a protective layer, the tubing is marked in accordance with the API 5CT standard and strapped with metal belt.

R95  API-5CT casing pipe is a comparatively low steel grade in oil drilling. It is widely applied for shallow oil and gas extraction.Because of  its low cost among other grades of steel, it enjoys wider applications,  can be generally used in shallow wells, geothermal wells, and water wells.

API 5CT R95 Casing:

R950 Casing is placed downhole to provide structural integrity to the wellbore and must withstand external-collapse pressure from rock formations and internal-yield pressure from fluid and gas. It must also hold its own deadweight and withstand the torque and transaxial pressure placed on it while running downhole.

API 5CT R95 Casing Tubing Mechanical Properties:

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.