The specifications and standards of Oil casing may vary depending on regions and manufacturers. Here are some common specifications and standards:

  • Size: The size of the casing is usually expressed in inches, ranging from 5-1/2 inches to 8-5/8 inches.
  • Wall thickness: The wall thickness is usually expressed in inches or millimeters, ranging from 0.231 inches to 0.540 inches.
  • steel grade: The steel grade is usually represented by letters, such as J55, N80, P110, etc.
  • Thread type: The thread type is usually represented by letters, such as round thread and buttress thread.
  • Length: The length is usually expressed in meters, ranging from 8 meters to 12 meters.
  • Outer diameter: The outer diameter is usually expressed in millimeters, ranging from 114.3 millimeters to 219.1 millimeters.

In practical applications, the appropriate oil casing specifications and standards should be selected according to the specific application environment and requirements.

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