Exploring the differences Between Casing Pipe and drill Pipe

Casing pipe and drill pipe are two distinct types of pipes used in the Oil and gas industry. While they are both used to transport oil and gas, they have different characteristics and serve different purposes.

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.

Casing pipe is a type of steel pipe that is used to line the walls of a drilled well. It is typically made of steel or plastic and is designed to be strong and durable. Casing pipe is installed in sections and is cemented in place to provide a secure Seal. It is used to protect the well from contamination and to prevent the walls of the well from collapsing.
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Drill pipe, on the other hand, is a type of steel pipe that is used to transport oil and gas from the wellhead to the surface. It is typically made of steel and is designed to be strong and durable. Drill pipe is connected in sections and is used to provide a pathway for the oil and gas to travel from the wellhead to the surface.

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In summary, casing pipe and drill pipe are two distinct types of pipes used in the oil and gas industry. Casing pipe is used to line the walls of a drilled well and is cemented in place to provide a secure seal. Drill pipe is used to transport oil and gas from the wellhead to the surface.

How Casing Pipe and Drill Pipe Differ in Their Uses and Applications

Labels Outside diameter
(d/mm)		 T&C
(kg/m)		 Wall thickness  
(t/mm)		 Type of end-finish
         
1 2       J55/K55 M65 L80/R95 N80-1/Q C90/T95 P110 Q125
4-1/2 9.50 114.30 14.14 5.21 PS PS – – – – –
  10.50 114.30 15.63 5.69 PSB PSB – – – – –
  11.60 114.30 17.26 6.35 PSLB PLB PLB PLB PLB PLB –
  13.50 114.30 20.09 7.37 – PLB PLB PLB PLB PLB –
  15.10 114.30 22.47 8.56 – – – – – PLB PLB
5 11.50 127.00 17.11 5.59 PS PS – – – – –
  13.00 127.00 19.35 6.43 PSLB PSLB – – – – –
  15.00 127.00 22.32 7.52 PSLB PLB SLB PLB PLB PLB 　
  18.00 127.00 26.79 9.19 – PLB SLB PLB PLB PLB PLB
  21.40 127.00 31.85 11.10 – PLB PLB PLB PLB PLB PLB
  23.20 127.00 34.53 12.14 – – PLB PLB PLB PLB PLB
  24.10 127.00 35.87 12.70 – – PLB PLB PLB PLB PLB
5-1/2 14.00 139.70 20.83 6.20 PS PS – – – – –
  15.50 139.70 23.07 6.98 PSLB PSLB – – – – –
  17.00 139.70 25.30 7.72 PSLB PLB PLB PLB PLB PLB –
  20.00 139.70 29.76 9.17 – PLB PLB PLB PLB PLB –
  23.00 139.70 34.23 10.54 – PLB PLB PLB PLB PLB PLB
  26.80 139.70 39.88 12.70 – – – – P – –
  29.70 139.70 44.20 14.27 – – – – P – –
  32.60 139.70 48.52 15.88 – – – – P – –
  35.30 139.70 52.53 17.45 – – – – P – –
  38.00 139.70 56.55 19.05 – – – – P – –
  40.50 139.70 60.27 20.62 – – – – P – –
  43.10 139.70 64.14 22.22 – – – – P – –
6-5/8 20.00 168.28 29.76 7.32 PSLB PSLB – – – – –
  24.00 168.28 35.72 8.94 PSLB PLB PLB PLB PLB PLB –
  28.00 168.28 41.67 10.59 – PLB PLB PLB PLB PLB –
  32.00 168.28 47.62 12.06 – – PLB PLB PLB PLB PLB
7 17.00 177.80 25.30 5.87 – – – – – – –
  20.00 177.80 29.76 6.91 PS PS – – – – –
  23.00 177.80 34.23 8.05 PSLB PLB PLB PLB PLB – –
  26.00 177.80 38.69 9.19 – PLB PLB PLB PLB PLB –
  29.00 177.80 43.16 10.36 – PLB PLB PLB PLB PLB –
  32.00 177.80 47.62 11.51 – PLB PLB PLB PLB PLB –
  35.00 177.80 52.09 12.65 – – PLB PLB PLB PLB PLB
  38.00 177.80 56.55 13.72 – – PLB PLB PLB PLB PLB
  42.70 177.80 63.55 15.88 – – – – P – –
  46.40 177.80 69.05 17.45 – – – – P – –
  50.10 177.80 74.56 19.05 – – – – P – –
  53.60 177.80 79.77 20.62 – – – – P – –
  57.10 177.80 84.98 22.22 – – – – P – –
7-5/8 24.00 193.68 35.72 7.62 – – – – 　 – –
  26.40 193.68 39.29 8.33 PSLB PSLB PLB PLB PLB – –
  29.70 193.68 44.20 9.52 – PLB PLB PLB PLB PLB –
  33.70 193.68 50.15 10.92 – PLB PLB PLB PLB PLB –
  39.00 193.68 58.04 12.70 – – PLB PLB PLB PLB PLB
  42.80 193.68 63.69 14.27 – – PLB PLB PLB PLB PLB
  45.30 193.68 67.42 15.11 – – PLB PLB PLB PLB PLB
  47.10 193.68 70.09 15.88 – – PLB PLB PLB PLB PLB
  51.20 193.68 76.20 17.45 – – – – P – –
  55.30 193.68 82.30 19.05 – – – – P – –
7-3/4 46.10 196.85 68.61 15.11 – – P P P P P
8-5/8 24.00 219.08 35.72 6.71 PS PS – – – – –
  28.00 219.08 41.67 7.72 　 PS – – – – –
  32.00 219.08 47.62 8.94 PSLB PSLB – – – – –
  36.00 219.08 53.58 10.16 PSLB PSLB PLB PLB PLB PLB –
  40.00 219.08 59.53 11.43 – PLB PLB PLB PLB PLB –
  44.00 219.08 65.48 12.70 – – PLB PLB PLB PLB –
  49.00 219.08 72.92 14.15 – – PLB PLB PLB PLB PLB
9-5/8 32.30 244.48 48.07 7.92 – – – – – – –
  36.00 244.48 53.58 8.94 PSLB PSLB – – – – –
  40.00 244.48 59.53 10.03 PSLB PSLB PLB PLB PLB – –
  43.50 244.48 64.74 11.05 – PLB PLB PLB PLB PLB –
  47.00 244.48 69.95 11.99 – PLB PLB PLB PLB PLB PLB
  53.50 244.48 79.62 13.84 – – PLB PLB PLB PLB PLB
  58.40 244.48 86.91 15.11 – – PLB PLB PLB PLB PLB
  59.40 244.48 88.40 15.47 – – – – P – –
  64.90 244.48 96.58 17.07 – – – – P – –
  70.30 244.48 104.62 18.64 – – – – P – –
  75.60 244.48 112.51 20.24 – – – – P – –
10-3/4 32.75 273.05 48.74 7.09 – – – – – – –
  40.50 273.05 60.27 8.89 PSB PSB – – – – –
  45.50 273.05 67.71 10.16 PSB PSB – – – – –
  51.00 273.05 75.90 11.43 PSB PSB PSB PSB PSB PSB –
  55.50 273.05 82.60 12.57 – PSB PSB PSB PSB PSB –
  60.70 273.05 90.33 13.84 – – – – PSB PSB PSB
  65.70 273.05 97.77 15.11 – – – – PSB PSB PSB
  73.20 273.05 108.94 17.07 – – – – P – –
  79.20 273.05 117.87 18.64 – – – – P – –
  85.30 273.05 126.94 20.24 – – – – P – –
11-3/4 42.00 298.45 62.50 8.46 – – – – – – –
  47.00 298.45 69.95 9.53 PSB PSB – – – – –
  54.00 298.45 80.36 11.05 PSB PSB – – – – –
  60.00 298.45 89.29 12.42 PSB PSB PSB PSB PSB PSB PSB
  65.00 298.45 96.73 13.56 – – P P P P P
  71.00 298.45 105.66 14.78 – – P P P P P
13-3/8 48.00 339.72 71.43 8.38 – – – – – – –
  54.50 339.72 81.11 9.65 PSB PSB – – – – –
  61.00 339.72 90.78 10.92 PSB PSB – – – – –
  68.00 339.72 101.20 12.19 PSB PSB PSB PSB PSB PSB –
  72.00 339.72 107.15 13.06 – – PSB PSB PSB PSB PSB
16 65.00 406.40 96.73 9.53 – – – – – – –
  75.00 406.40 111.62 11.13 PSB PSB – – – – –
  84.00 406.40 125.01 12.57 PSB PSB – – – – –
  109.00 406.40 162.21 16.66 P – P P – P P
18-5/8 87.50 473.08 130.22 11.05 PSB PSB – – – – –
20 94.00 508.00 139.89 11.13 PSLB PSLB – – – – –
  106.50 508.00 158.49 12.70 PSLB PSLB – – – – –
  133.00 508.00 197.93 16.13 PSLB – – – – – –