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CASING
CASING PIPE
Oil Casing Pipe
PIPE CASINGS
CASING
CASING PIPE
Oil Casing Pipe
PIPE CASINGS

CASING

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore.
LENGTH: R1, R2, R3
Standard & Grade:API 5CT J 55/K55/N80/C75/L80/C90/T95/Q125
Product introduction
Technical data
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Product introduction
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 well bore 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.

Standards and Technical Conditions for Supply:API Spec 5CT ISO13680
Grade: J55, K55, N80-1,N80-Q, L80-1, L80-9Cr,L80-13Cr,​C95, P110.
Oil Casing Pipe: Casings are used for fixing the well wall or down hole, which have wide diameters, can be divided into conductor casings, technical casings and Oil casings.
Standards and Technical Conditions for Supply:API Spec 5CT
Grade of pipe casing: J55, K55, N80-1,N80-Q, L80-1, L80-9Cr,L80-13Cr,C95, P110.
Dimension: OD: 114.3-508mm WT: 5.21-16.13mm
Technical data
Lengths:
 Oil Casing Range 1 Range 2 Range 3
4.88~7.62 7.62~10.36 10.36~14.63

Dimension:
Labels Outside diameter  D Nominal linear mass T&C Wall thickness t J55 N80 L80 C90 P110 Q125
mm kg/m mm K55 1/Q? T95
1 2 3 4 5 6 7 8 9 10 11
4 1/2 9.5 114.3 14.14 5.21 PS - - - - -
4 1/2 10.5 114.3 15.63 5.69 PSB - - - - -
4 1/2 11.6 114.3 17.26 6.35 PSLB PLB PLB PLB PLB -
4 1/2 13.5 114.3 20.09 7.37 - PLB PLB PLB PLB -
4 1/2 15.1 114.3 22.47 8.56 - - - - PLB PLB
5 11.5 127 17.11 5.59 PS - - - - -
5 13 127 19.35 6.43 PSLB - - - - -
5 15 127 22.32 7.52 PSLBE PLBE PLBE PLBE PLBE -
5 18 127 26.79 9.19 - PLBE PLBE PLBE PLBE PLBE
5 21.4 127 31.85 11.1 - PLB PLB PLB PLB PLB
5 23.2 127 34.53 12.14 - PLB PLB PLB PLB PLB
5 24.1 127 35.86 12.7 - PLB PLB PLB PLB PLB
5 1/2 14 139.7 20.83 6.2 PS - - - - -
5 1/2 15.5 139.7 23.07 6.98 PSLBE - - - - -
5 1/2 17 139.7 25.3 7.72 PSLBE PLBE PLBE PLBE PLBE -
5 1/2 20 139.7 29.76 9.17 - PLBE PLBE PLBE PLBE -
5 1/2 23 139.7 34.23 10.54 - PLBE PLBE PLBE PLBE PLBE
5 1/2 26.8 139.7 39.88 12.7 - - - P - -
5 1/2 29.7 139.7 44.2 14.27 - - - P - -
5 1/2 32.6 139.7 48.51 15.88 - - - P - -
5 1/2 35.3 139.7 52.53 17.45 - - - P - -
5 1/2 38 139.7 56.55 19.05 - - - P - -
5 1/2 40.5 139.7 60.27 20.62 - - - P - -
5 1/2 43.1 139.7 64.14 22.22 - - - P - -
6 5/8 20 168.28 29.76 7.32 PSLB - - - - -
6 5/8 24 168.28 35.72 8.94 PSLBE PLBE PLBE PLBE PLBE -
6 5/8 28 168.28 41.67 10.59 - PLBE PLBE PLBE PLBE -
6 5/8 32 168.28 47.62 12.06 - PLBE PLBE PLBE PLBE PLBE
7 17 177.8 25.3 5.87 - - - - - -
7 20 177.8 29.76 6.91 PS - - - - -
7 23 177.8 34.23 8.05 PSLBE PLBE PLBE PLBE - -
7 26 177.8 38.69 9.19 PSLBE PLBE PLBE PLBE PLBE -
7 29 177.8 43.16 10.36 - PLBE PLBE PLBE PLBE -
7 32 177.8 47.62 11.51 - PLBE PLBE PLBE PLBE -
7 35 177.8 52.09 12.65 - PLBE PLBE PLBE PLBE PLBE
7 38 177.8 56.55 13.72 - PLBE PLBE PLBE PLBE PLBE
7 42.7 177.8 63.54 15.88 - - - P - -
7 46.4 177.8 69.05 17.45 - - - P - -
7 50 177.8 74.56 19.05 - - - P - -
7 53.6 177.8 79.77 20.62 - - - P - -
7 57.1 177.8 84.97 22.22 - - - P - -
7 5/8 24 193.68 35.72 7.62 - - - - - -
7 5/8 26.4 193.68 39.29 8.33 PSLBE PLBE PLBE PLBE - -
7 5/8 29.7 193.68 44.2 9.52 - PLBE PLBE PLBE PLBE -
7 5/8 33.7 193.68 50.15 10.92 - PLBE PLBE PLBE PLBE -
7 5/8 39 193.68 58.04 12.7 - PLBE PLBE PLBE PLBE PLBE
7 5/8 42.8 193.68 63.69 14.27 - PLB PLB PLB PLB PLB
7 5/8 45.3 193.68 67.41 15.11 - PLB PLB PLB PLB PLB
7 5/8 47.1 193.68 70.09 15.88 - PLB PLB PLB PLB PLB
7 5/8 51 193.68 76.19 17.45 - - - P - -
7 5/8 55.3 193.68 82.3 19.05 - - - P - -
8 5/8 24 219.08 35.72 6.71 PS - - - - -
8 5/8 28 219.08 41.67 7.72 - - - - - -
8 5/8 32 219.08 47.62 8.94 PSLBE - - - - -
8 5/8 36 219.08 53.57 10.16 PSLBE PLBE PLBE PLBE - -
8 5/8 40 219.08 59.53 11.43 - PLBE PLBE PLBE PLBE -
8 5/8 44 219.08 65.48 12.7 - PLBE PLBE PLBE PLBE  
8 5/8 49 219.08 72.92 14.15 - PLBE PLBE PLBE PLBE PLBE
9 5/8 32 244.48 48.07 7.92 - - - - - -
9 5/8 36 244.48 53.57 8.94 PSLB - - - - -
9 5/8 40 244.48 59.53 10.03 PSLBE PLBE PLBE PLBE - -
9 5/8 43.5 244.48 64.73 11.05 - PLBE PLBE PLBE PLBE -
9 5/8 47 244.48 69.94 11.99 - PLBE PLBE PLBE PLBE PLBE
9 5/8 53.5 244.48 79.62 13.84 - PLBE PLBE PLBE PLBE PLBE
9 5/8 58.4 244.48 86.91 15.11 - PLB PLB PLB PLB PLB
9 5/8 59 244.48 88.4 15.47 - - - P - -
9 5/8 64.9 244.48 96.58 17.07 - - - P - -
9 5/8 70.3 244.48 104.62 18.64 - - - P - -
9 5/8 75.6 244.48 112.5 20.24 - - - P - -
10 3/4 32.75 273.05 48.74 7.09 - - - - - -
10 3/4 40.5 273.05 60.27 8.89 PSB - - - - -
10 3/4 45.5 273.05 67.71 10.16 PSBE - - - - -
10 3/4 51 273.05 75.9 11.43 PSBE PSBE PSBE PSBE PSBE -
10 3/4 55 273.05 82.59 12.57 - PSBE PSBE PSBE PSBE -
10 3/4 60.7 273.05 90.33 13.84 - - - PSBE PSBE PSBE
10 3/4 65.7 273.05 97.77 15.11 - - - PSB PSB PSB
10 3/4 73.2 273.05 108.93 17.07 - - - P - -
10 3/4 79.2 273.05 117.86 18.64 - - -  P - -
10 3/4 85.3 273.05 126.94 20.24        P    
11 3/4 42 298.45 62.5 8.46  -  -  -  -  -  -
11 3/4 47 298.45 69.94 9.53 PSB  -  -  -  -  -
11 3/4 54 298.45 80.36 11.05 PSB  -  -  -  -  -
11 3/4 60 298.45 89.29 12.42 PSB PSB PSB PSB PSB PSB
11 3/4 65 298.45 96.73 13.56  - P P P P P
11 3/4 71 298.45 105.66 14.78  - P P P P P
13 3/8 48 339.72 71.43 8.38 - - - - - -
13 3/8 54.5 339.72 81.1 9.65 PSB - - - - -
13 3/8 61 339.72 90.78 10.92 PSB - - - - -
13 3/8 68 339.72 101.19 12.19 PSB PSB PSB PSB PSB -
13 3/8 72 339.72 107.15 13.06 - PSB PSB PSB PSB PSB
16 65 406.4 96.73 9.53 - - - - - -
16 75 406.4 111.61 11.13 PSB - - - - -
16 84 406.4 125.01 12.57 PSB - - - - -
16 109 406.4 162.21 16.66 P P P - P P
18 5/8 87.5 473.08 130.21 11.05 PSB - - - - -
20 94 508 139.89 11.13 PSLB - - - - -
20 106.5 508 158.49 12.7 PSLB - - - - -
20 133 508 197.93 16.13 PSLB - - - - -
P——Plain end; S——Short round thread;L——Long round thread;B——Buttress thread;E——Extreme line.

Tolerance
Types of steel tubes Outer Diameter Wall Thickness
Cold-rolled tubes Tube sizes(mm) Tolerances(mm) Tolerances(mm)
<114.3 ±0.79 -12.5%
   


Chemical Composition

Standard Grade Chemical compositions(%)
API SPEC 5CT J55 C Si Mn P S Cr Ni Cu Mo V
K55 0.34~0.39 0.20~0.35 1.25~1.50 ≤0.020 ≤0.015 ≤0.15 ≤0.20 ≤0.20 / /
N80 0.34~0.38 0.20~0.35 1.45~1.70 ≤0.020 ≤0.015 ≤0.15 / / / 0.11~0.16
L80 0.15~0.22 ≤1.00 0.25~1.00 ≤0.020 ≤0.010 12.0~14.0 ≤0.20 ≤0.20 / /
P110 0.26~0.395 0.17~0.37 0.40~0.70 ≤0.020 ≤0.010 0.80~1.10 ≤0.20 ≤0.20 0.15~0.25 ≤0.08


Mechanical Properties

Grade Type Total elongation under load (%) Yield strength (min) Yield strength (max) Tensile strength min Mpa Hardness Max (HRC) Hardness Max(HBW)
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 - -
L80 1 0.5 552 655 655 23 241
L80 9Cr 0.5 552 655 655 23 241
L80 13Cr 0.5 552 655 655 23 241
C90 - 0.5 621 724 689 25.4 255
C95 - 0.5 655 758 724 - -
T95 - 0.5 655 758 724 25.4 255
P110 - 0.6 758 965 862 - -
Q125 All 0.65 862 1034 931 - -













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