Exploring the Benefits of N80 and L80 Oil casing: A comparison
The Oil and gas industry relies heavily on the use of oil casing to ensure the safe and efficient extraction of resources. Two of the most commonly used types of oil casing are N80 and L80. While both are effective in their own right, there are distinct differences between the two that can make one more suitable for a particular application than the other. This article will explore the benefits of N80 and L80 oil casing and compare them to determine which is the better option.
N80 oil casing is a type of steel Pipe that is used in oil and gas wells. It is made from a combination of chromium, molybdenum, and manganese and is designed to withstand high levels of pressure. n80 casing is known for its strength and durability, making it an ideal choice for deep wells and high-pressure applications. Additionally, N80 casing is resistant to corrosion and can be used in both sweet and sour environments.
L80 oil casing is also a type of steel pipe used in oil and gas wells. It is made from a combination of chromium, molybdenum, and manganese and is designed to withstand high levels of pressure. l80 casing is known for its flexibility and is often used in shallow wells and low-pressure applications. Additionally, L80 casing is resistant to corrosion and can be used in both sweet and sour environments.
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| Chemical composition, Mass Fraction (%) | ||||||||||||||
| grade | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | |||||
| Type | min | max | min | max | min | max | min | max | max | max | max | max | max | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| H40 | — | — | — | — | — | — | — | — | — | — | — | — | 0.03 | — |
| J55 | — | — | — | — | — | — | — | — | — | — | — | — | 0.03 | — |
| K55 | — | — | — | — | — | — | — | — | — | — | — | — | 0.03 | — |
| N80 | 1 | — | — | — | — | — | — | — | — | — | — | 0.03 | 0.03 | — |
| N80 | Q | — | — | — | — | — | — | — | — | — | — | 0.03 | 0.03 | — |
| R95 | — | — | 0.45 c | — | 1.9 | — | — | — | — | — | — | 0.03 | 0.03 | 0.45 |
| L80 | 1 | — | 0.43 a | — | 1.9 | — | — | — | — | 0.25 | 0.35 | 0.03 | 0.03 | 0.45 |
| L80 | 9Cr | — | 0.15 | 0.3 | 0.6 | 0.9 | 1.1 | 8 | 10 | 0.5 | 0.25 | 0.02 | 0.03 | 1 |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1 | — | — | 12 | 14 | 0.5 | 0.25 | 0.02 | 0.03 | 1 |
| C90 | 1 | — | 0.35 | — | 1.2 | 0.25 b | 0.85 | — | 1.5 | 0.99 | — | 0.02 | 0.03 | — |
| T95 | 1 | — | 0.35 | — | 1.2 | 0.25 b | 0.85 | 0.4 | 1.5 | 0.99 | — | 0.02 | 0.03 | — |
| C110 | — | — | 0.35 | — | 1.2 | 0.25 | 1 | 0.4 | 1.5 | 0.99 | — | 0.02 | 0.03 | — |
| P110 | e | — | — | — | — | — | — | — | — | — | — | 0.030 e | 0.030 e | — |
| Q125 | 1 | — | 0.35 | 1.35 | — | 0.85 | — | 1.5 | 0.99 | — | 0.02 | 0.01 | — | |
| NOTE Elements shown shall be reported in product analysis. | ||||||||||||||
| a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched or polymer-quenched. | ||||||||||||||
| b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the Wall thickness is less than 17.78 mm. | ||||||||||||||
| c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched. | ||||||||||||||
| d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm. | ||||||||||||||
| e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum. | ||||||||||||||
When comparing N80 and L80 oil casing, it is important to consider the benefits of each. N80 casing is known for its strength and durability, making it an ideal choice for deep wells and high-pressure applications. Additionally, N80 casing is resistant to corrosion and can be used in both sweet and sour environments. On the other hand, L80 casing is known for its flexibility and is often used in shallow wells and low-pressure applications. Additionally, L80 casing is resistant to corrosion and can be used in both sweet and sour environments.
In conclusion, both N80 and L80 oil casing offer distinct benefits that make them suitable for different applications. N80 casing is known for its strength and durability, making it an ideal choice for deep wells and high-pressure applications. On the other hand, L80 casing is known for its flexibility and is often used in shallow wells and low-pressure applications. Ultimately, the choice between N80 and L80 oil casing will depend on the specific needs of the application.
Comparing the Performance of N80 and L80 Oil Casing in Oil and Gas Applications
| Calculated Mass c | |||||||||||
| Nominal Linear Mass T& C b,c | Wall Thick- ness | em, Mass Gain or Loss Due to End Finishing d | |||||||||
| Labels a | 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 |
| 10 3/4 | 32.75 | 273.05 | 48.74 | 7.09 | 258.9 | 254.91 | 46.5 | 13.94 | — | — 15.38 | — 3.03 |
| 10 3/4 | 40.5 | 273.05 | 60.27 | 8.89 | 255.3 | 251.31 | 57.91 | 11.91 | — | 14.21 | 1.86 |
| 10 3/4 | 45.5 | 273.05 | 67.71 | 10.16 | 252.7 | 250.82 e 248.77 246.23 246.33 | 65.87 | 11 | — | 14.21 | 1.86 |
| 10 3/4 | 45.5 | 273.05 | 67.71 | 10.16 | 252.7 | 244.48 e | 65.87 | 11 | — | 13.05 | 0.7 |
| 10 3/4 | 51 | 273.05 | 75.9 | 11.43 | 250.2 | 244.48 e 243.94 243.94 241.40 241.40 238.86 238.86 234.95 231.80 228.60 | 73.75 | 10.11 | — | 13.05 | 0.7 |
| 10 3/4 | 51 | 273.05 | 75.9 | 11.43 | 250.2 | 73.75 | 10.16 f | — | 12.25 | –0.09 | |
| 10 3/4 | 55.5 | 273.05 | 82.59 | 12.57 | 247.9 | 80.75 | 9.3 | — | 12.01 | –0.34 | |
| 10 3/4 | 55.5 | 273.05 | 82.59 | 12.57 | 247.9 | 80.75 | 9.35 f | — | 12.25 | –0.09 | |
| 10 3/4 | 55.5 | 273.05 | 82.59 | 12.57 | 247.9 | 80.75 | 9.3 | — | 12.01 | –0.34 | |
| 10 3/4 | 55.5 | 273.05 | 82.59 | 12.57 | 247.9 | 80.75 | 9.35 f | — | 11.07 | — | |
| 10 3/4 | 60.7 | 273.05 | 90.33 | 13.84 | 245.4 | 88.47 | 8.42 | — | 10.87 | — | |
| 10 3/4 | 60.7 | 273.05 | 90.33 | 13.84 | 245.4 | 88.47 | 8.47 f | — | 9.98 | — | |
| 10 3/4 | 65.7 | 273.05 | 97.77 | 15.11 | 242.8 | 96.12 | 7.54 | — | 9.74 | — | |
| 10 3/4 | 65.7 | 273.05 | 97.77 | 15.11 | 242.8 | 96.12 | 7.60 f | — | — | — | |
| 10 3/4 | 73.2 | 273.05 | 108.93 | 17.07 | 238.9 | 107.76 | — | — | — | — | |
| 10 3/4 | 79.2 | 273.05 | 117.86 | 18.64 | 235.8 | 116.95 | — | — | — | — | |
| 10 3/4 | 85.3 | 273.05 | 126.94 | 20.24 | 232.6 | 126.19 | — | — | |||
| 11 3/4 | 42 | 298.45 | 62.5 | 8.46 | 281.5 | 279.40 e 277.50 275.44 272.39 | 62.56 | 13.27 | — | — | — |
| 11 3/4 | 42 | 298.45 | 62.5 | 8.46 | 281.5 | 269.88 e | 62.56 | 13.27 | — | — 16.04 | — |
| 11 3/4 | 47 | 298.45 | 69.94 | 9.52 | 279.41 | 269.88 e | 67.83 | 12.42 | — | 14.5 | — |
| 11 3/4 | 54 | 298.45 | 80.36 | 11.05 | 276.4 | 269.65 | 78.32 | 11.23 | — | 13.12 | — |
| 11 3/4 | 60 | 298.45 | 89.29 | 12.42 | 273.6 | 269.65 e | 87.61 | 10.17 | — | 13.12 | — |
| 11 3/4 | 60 | 298.45 | 89.29 | 12.42 | 273.6 | 269.88 e 267.36 264.92 | 87.61 | 9.77 f | — | 13.12 | — |
| 11 3/4 | 60 | 298.45 | 89.29 | 12.42 | 273.6 | 87.61 | 10.17 | — | 13.12 | — | |
| 11 3/4 | 60 | 298.45 | 89.29 | 12.42 | 273.6 | 87.61 | 9.77 f | — | — | — | |
| 11 3/4 | 65 | 298.45 | 96.73 | 13.56 | 271.3 | 95.27 | — | — | — | — | |
| 11 3/4 | 65 | 298.45 | 96.73 | 13.56 | 271.3 | 95.27 | — | — | — | — | |
| 11 3/4 | 71 | 298.45 | 105.66 | 14.78 | 268.9 | 103.4 | — | — | — | ||
