Oil Drilling Tool Standard API 5CT Seamless Casing J55/K55/L80/N80/P110/T95/Q125

Overview of   API 5CT seamless casing J55/K55/l80/N80/P110/T95/Q125 oil drilling is a complex process that requires the use of various tools and equipment to extract oil from the ground. One such…

Overview of  API 5CT seamless casing J55/K55/l80/N80/P110/T95/Q125

oil drilling is a complex process that requires the use of various tools and equipment to extract oil from the ground. One such tool is the API 5CT seamless casing, which plays a crucial role in the drilling process. In this article, we will provide an overview of the API 5CT seamless casing, specifically focusing on the J55, K55, L80, N80, P110, T95, and Q125 grades.

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
8 5/8 24 219.08 35.72 6.71 205.66 202.48 35.14 10.93
8 5/8 28 219.08 41.67 7.72 203.64 200.46 40.24 10.07 — 12.44 — 12.57 — 2.51
8 5/8 32 219.08 47.62 8.94 201.2 200.02 e 198.02 195.58 46.33 9.39 12.44 12.57 2.51
8 5/8 32 219.08 47.62 8.94 201.2 193.68 e 46.33 9.39 11.6 11.68 1.62
8 5/8 36 219.08 53.57 10.16 198.76 193.04 52.35 8.72 10.73 10.77 0.71
8 5/8 40 219.08 59.53 11.43 196.22 190.5 58.53 10.73 10.77 0.71
8 5/8 40 219.08 59.53 11.43 196.22 187.6 58.53 9.88 9.87 –0.20
8 5/8 44 219.08 65.48 12.7 193.68   64.64 8.88 8.85 –1.21
8 5/8 49 219.08 72.92 14.15 190.78   71.51      
9 5/8 32.3 244.48 48.07 7.92 228.6 224.66 46.2 11 — 14.48 — 13.87 — 2.74
9 5/8 36 244.48 53.57 8.94 226.6 222.63 51.93 10.36 13.59 12.97 1.84
9 5/8 40 244.48 59.53 10.03 224.4 222.25 e 220.45 218.41 218.41 216.54 216.54 57.99 9.69 13.59 12.97 1.84
9 5/8 40 244.48 59.53 10.03 224.4 215.90 e 57.99 9.69 12.78 12.15 1.01
9 5/8 43.5 244.48 64.74 11.05 222.4 215.90 e 212.83 212.83 63.61 12.84 f 12.15 1.01
9 5/8 43.5 244.48 64.74 11.05 222.4 212.72 e 63.61 12.03 11.39 0.25
9 5/8 47 244.48 69.94 11.99 220.5 212.72 e 210.29 210.29 209.58 206.38 203.23 200.02 68.75 12.09 f 11.39 0.25
9 5/8 47 244.48 69.94 11.99 222.5   68.75 10.57 9.92 –1.22
9 5/8 53.5 244.48 79.62 13.84 216.8   78.72 10.63 f 9.92 –1.22
9 5/8 53.5 244.48 79.62 13.84 216.8   78.72 10.57 9.92 –1.22
9 5/8 53.5 244.48 79.62 13.84 216.8   78.72 10.63 f 9.92 –1.22
9 5/8 53.5 244.48 79.62 13.84 216.8   78.72 9.58 8.92 –2.22
9 5/8 58.4 244.48 86.91 15.11 214.25   85.47 9.65 f 8.92 –2.22
9 5/8 58.4 244.48 86.91 15.11 214.25   85.47 9.58 8.92 –2.22
9 5/8 58.4 244.48 86.91 15.11 214.25   85.47 9.65 f 8.92 –2.22
9 5/8 58.4 244.48 86.91 15.11 214.25   85.47
9 5/8 59.4 244.48 88.4 15.47 213.5   87.37
9 5/8 64.9 244.48 96.58 17.07 210.3   95.73
9 5/8 70.3 244.48 104.62 18.64 207.2   103.82
9 5/8 75.6 244.48 112.51 20.24 204   111.93    

The API 5CT seamless casing is a type of Pipe that is used to line the walls of a wellbore during drilling operations. It is designed to provide structural support to the wellbore and prevent the collapse of the hole. The casing also serves as a conduit for the Oil and Gas to flow from the reservoir to the surface.

The J55 Grade of API 5CT seamless casing is a relatively low-cost option that is suitable for shallow wells with low pressure. It has a minimum yield strength of 55,000 psi and is commonly used in mild sour service conditions. The K55 grade, on the other hand, has the same yield strength as J55 but is more resistant to corrosion, making it suitable for slightly more corrosive environments.
Pencil Case

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The L80 grade of API 5CT seamless casing is a medium-Carbon steel that is heat-treated to improve its mechanical properties. It has a minimum yield strength of 80,000 psi and is commonly used in moderate sour service conditions. The N80 grade, on the other hand, is a higher-strength steel with a minimum yield strength of 80,000 psi. It is commonly used in more severe sour service conditions.

The P110 grade of API 5CT seamless casing is a high-strength steel that is heat-treated to improve its mechanical properties. It has a minimum yield strength of 110,000 psi and is commonly used in deep wells with high pressure. The T95 grade, on the other hand, is a higher-strength steel with a minimum yield strength of 95,000 psi. It is commonly used in moderate to high-pressure environments.

The Q125 grade of API 5CT seamless casing is a high-strength steel that is heat-treated to improve its mechanical properties. It has a minimum yield strength of 125,000 psi and is commonly used in deep wells with high pressure. It is also suitable for sour service conditions.

In addition to the different grades, API 5CT seamless casing is available in various sizes and lengths to accommodate