Here, D is the inner diameter of the pipe, which is the area the fluid flows through. The outer diameter of the pipe is also ...
As seen in Chapters 3 and Chapters 4, the size of the flow conduit through which the gas is produced (this could be the tubing or the casing-tubing annulus or simultaneous flow up the casing-tubing ...
user consultation with pipe suppliers is typical for optimization of pipe selection. Size choices include standard nominal English sizes, metric sizes, wall thickness, and pipe schedule if applicable.