The Benefits of Using casing tube for Oil and gas Exploration
Casing tube is an essential tool for oil and gas exploration. It is used to protect the wellbore from collapsing and to prevent the contamination of the oil and gas reserves. Casing tube also helps to maintain the integrity of the wellbore and to ensure that the oil and gas reserves are not lost due to the collapse of the wellbore.
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. |
Labels a | Calculated Mass c | ||||||||||
Nominal Linear Mass T& C b,c | Wall Thick- ness | em, Mass Gain or Loss Due to End Finishing d | |||||||||
Outside Diameter | Inside Diameter | Drift Diameter | Plain- end | kg | |||||||
round Thread | Buttress Thread | ||||||||||
wpe | |||||||||||
D | kg/m | t | D | mm | kg/m | Short | Long | RC | SCC | ||
mm | mm | mm | |||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
13 3/8 | 48 | 339.72 | 71.43 | 8.38 | 322.96 | 318.99 | 68.48 | 15.04 | — | — 17.91 | — |
13 3/8 | 54.5 | 339.72 | 81.1 | 9.65 | 320.42 | 316.45 | 78.55 | 13.88 | — | 16.44 | — |
13 3/8 | 61 | 339.72 | 90.78 | 10.92 | 317.88 | 313.91 | 88.55 | 12.74 | — | 14.97 | — |
13 3/8 | 68 | 339.72 | 101.19 | 12.19 | 315.34 | 311.37 | 98.46 | 11.61 | — | 14.97 | — |
13 3/8 | 68 | 339.72 | 101.19 | 12.19 | 315.34 | 311.37 | 98.46 | 11.67 f | — | 14.33 | — |
13 3/8 | 72 | 339.72 | 107.15 | 13.06 | 313.6 | 311.15 e | 105.21 | 10.98 | — | 13.98 | — |
13 3/8 | 72 | 339.72 | 107.15 | 13.06 | 313.6 | 311.15 e 309.63 309.63 | 105.21 | 10.91 f | — | 14.33 | — |
13 3/8 | 72 | 339.72 | 107.15 | 13.06 | 313.6 | 105.21 | 10.98 | — | 13.98 | — | |
13 3/8 | 72 | 339.72 | 107.15 | 13.06 | 313.6 | 105.21 | 10.91 e | — | — | ||
16 | 65 | 406.4 | 96.73 | 9.53 | 387.4 | 382.57 | 96.73 | 18.59 | — | — 20.13 | — |
16 | 75 | 406.4 | 111.61 | 11.13 | 384.1 | 379.37 | 108.49 | 16.66 | — | 18.11 | — |
16 | 84 | 406.4 | 125.01 | 12.57 | 381.3 | 376.48 | 122.09 | 14.92 | — | — | — |
16 | 109 | 406.4 | 162.21 | 16.66 | 373.1 | 368.3 | 160.13 | — | — | — | |
18 5/8 | 87.5 | 473.08 | 130.21 | 11.05 | 450.98 | 446.22 | 125.91 | 33.6 | — | 39.25 | — |
20 | 94 | 508 | 139.89 | 11.13 | 485.7 | 480.97 | 136.38 | 20.5 | 27.11 | 24.78 | — |
20 | 94 | 508 | 139.89 | 11.13 | 485.7 | 480.97 | 136.38 | 20.61 | 27.26 g 24.27 17.84 | 24.78 | — |
20 | 106.5 | 508 | 158.49 | 12.7 | 482.6 | 477.82 | 155.13 | 18.22 | 22 | — | |
20 | 133 | 508 | 197.93 | 16.13 | 475.7 | 470.97 | 195.66 | 13.03 | 16.02 | — | |
NOTE See also Figures D.1, D.2, and D.3. | |||||||||||
a Labels are for information and assistance in ordering. | |||||||||||
b Nominal linear masses, threaded and coupled (Column 4) are shown for information only. | |||||||||||
c The densities of martensitic chromium steels (L80 Types 9Cr and 13Cr) are less than those of carbon steels; The masses shown are therefore not accurate for martensitic chromium steels; A mass correction factor of 0.989 shall be used. | |||||||||||
d Mass gain or loss due to end finishing; See 8.5. | |||||||||||
e Drift diameter for most common bit size; This drift diameter shall be specified in the purchase agreement and marked on the Pipe; See 8.10 for drift requirements. | |||||||||||
f Based on 758 mPa minimum yield strength or greater. | |||||||||||
g Based on 379 mPa minimum yield strength. |
The use of casing tube offers a number of benefits for oil and gas exploration. Firstly, it helps to ensure that the wellbore remains stable and secure. This is important as it helps to prevent the collapse of the wellbore, which can lead to the loss of the oil and gas reserves. Secondly, casing tube helps to protect the wellbore from contamination. This is important as it helps to ensure that the oil and gas reserves remain uncontaminated and can be extracted safely.
Thirdly, casing tube helps to maintain the integrity of the wellbore. This is important as it helps to ensure that the oil and gas reserves are not lost due to the collapse of the wellbore. Finally, casing tube helps to reduce the risk of accidents and injuries during oil and gas exploration. This is important as it helps to ensure that the exploration process is conducted safely and without any risks to personnel or the environment.
In conclusion, the use of casing tube for oil and gas exploration offers a number of benefits. It helps to ensure that the wellbore remains stable and secure, protects the wellbore from contamination, maintains the integrity of the wellbore, and reduces the risk of accidents and injuries during exploration. Therefore, it is essential for oil and gas exploration and should be used whenever possible.
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