Introduction to  API 5ct N80 casing Pipe

API 5CT N80 Casing Pipe -
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The Oil and gas industry relies heavily on various types of pipes and Tubing to ensure the efficient extraction and transportation of resources. One such type of pipe that is commonly used in this industry is the API 5CT N80 casing pipe. In this article, we will provide an introduction to this specific type of casing pipe, discussing its features, applications, and benefits.

The API 5CT N80 casing pipe is a type of seamless casing pipe that is made from a low alloy steel known as N80. This steel grade is widely used in the oil and gas industry due to its High strength, excellent Corrosion resistance, and good mechanical properties. The N80 casing pipe is manufactured according to the American petroleum Institute (API) 5CT standard, which sets the specifications for casing and tubing used in the industry.

          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 — —   —

One of the key features of the API 5CT N80 casing pipe is its high tensile strength. This means that it can withstand high pressure and stress without deforming or breaking. This makes it ideal for use in deep and high-pressure wells, where the casing pipe needs to withstand the Weight of the overlying rock formations and the pressure of the fluids being extracted.

In addition to its high strength, the API 5CT N80 casing pipe also offers excellent corrosion resistance. This is crucial in the oil and gas industry, as the casing pipe is constantly exposed to corrosive fluids and gases. The N80 steel grade has been specifically designed to resist corrosion, ensuring the longevity and reliability of the casing pipe.

The API 5CT N80 casing pipe is commonly used in a variety of applications in the oil and gas industry. It is often used as a protective barrier around the wellbore, preventing the collapse of the surrounding rock formations and the contamination of the extracted fluids. The casing pipe also provides a conduit for the extraction of oil and gas from the well, allowing it to flow to the surface for further processing.

api 5ct L80 casing tubingDimensions and Masses for Standard Casing and for Casing Threaded with
API Round Thread and Buttress Thread
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
4 1/2 9.5 114.3 14.38 5.21 103.88 100.7 14.02 3.64 — — 4.53 — 1.12
4 1/2 10.5 114.3 15.73 5.69 102.92 99.74 15.24 3.33 — 3.61 4.32 0.91
4 1/2 11.6 114.3 17.38 6.35 101.6 98.42 16.91 3.18 3.35 4.07 0.6
4 1/2 13.5 114.3 19.87 7.37 99.56 96.38 19.44 — 3.53 3.64 0.24
4 1/2 15.1 114.3 22.69 8.56 97.18 94 22.32 —      
5 11.5 127 17.19 5.59 115.82 112.64 16.74 4.32 — 4.85 — 5.38 — 1.24
5 13 127 19.69 6.43 114.14 110.96 19.12 4 4.51 4.99 0.61
5 15 127 22.69 7.52 111.96 108.78 22.16 3.71 4.52 4.4 0.22
5 18 127 27.19 9.19 108.62 105.44 26.7 — 3.45 3.76 –0.62
5 21.4 127 32.13 11.1 104.8 101.62 31.73 — 3.15 3.42 –0.96
5 23.2 127 34.76 12.14 102.72 99.54 34.39 — 2.99 3.23 –1.14
5 24.1 127 36.15 12.7 101.6 98.42 35.8 —      
5 1/2 14 139.7 20.91 6.2 127.3 124.12 20.41 4.6 — 5.26 — 5.71 — 0.87
5 1/2 15.5 139.7 23.48 6.98 125.74 122.56 22.85 4.36 5.31 5.41 0.58
5 1/2 17 139.7 25.72 7.72 124.26 121.08 25.13 4.14 4.5 4.84 0.45
5 1/2 20 139.7 30.05 9.17 121.36 118.18 29.52 — 4.37 4.31 -0.52
5 1/2 23 139.7 34.05 10.54 118.62 115.44 33.57 — — — —
5 1/2 26.8 139.7 40.15 12.7 114.3 111.12 39.78 — — — —
5 1/2 29.7 139.7 44.47 14.27 111.16 107.98 44.14 — — — —
5 1/2 32.6 139.7 48.74 15.88 107.94 104.76 48.49 — — — —
5 1/2 35.3 139.7 52.8 17.45 104.8 101.62 52.61 — — — —
5 1/2 38 139.7 56.82 19.05 101.6 98.42 56.68 — — — —
5 1/2 40.5 139.7 60.64 20.62 98.46 95.28 60.55 — — — —
5 1/2 43.1 139.7 64.41 22.22 95.26 92.08 64.38 —      
6 5/8 20 168.28 29.76 7.32 153.64 150.46 29.06 5.58 6.23 6.35 0.89
6 5/8 24 168.28 35.72 8.94 150.4 147.22 35.13 4.42 5.48 5.52 0.68
6 5/8 28 168.28 41.67 10.59 147.1 143.92 41.18 — 4.73 4.71 –0.75
6 5/8 32 168.28 47.62 12.06 144.16 140.98 46.46 — 4.73 4 –1.46

Furthermore, the API 5CT N80 casing pipe can also be used in well completion operations. It can be combined with other types of pipes and tubing to create a well completion system that allows for the efficient production of oil and gas. This system typically includes a Production casing, which is connected to the N80 casing pipe, and a tubing string, which is used to transport the extracted fluids to the surface.

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In conclusion, the API 5CT N80 casing pipe is a crucial component in the oil and gas industry. Its high strength, excellent corrosion resistance, and good mechanical properties make it an ideal choice for use in deep and high-pressure wells. Whether it is used as a protective barrier or in well completion operations, the N80 casing pipe plays a vital role in ensuring the efficient extraction and transportation of oil and gas resources.

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