Dear everyone....

I also read Rabia book regarding casing design, and i try to compare with another book about this same topic. but so far, all collapse and burst calculation is intended to determine weight and grade of each casing (either conductor, intermediate, production, etc)...

lets say if i wanna do casing design and i have well data as an input for grade and weight determination by collapse burst calculation, so what about the casing programme??? whats the reason to choose eg. 30/24/20/16 OD for conductor and others casing/tubing OD....

so far, i only saw that all calculation have mention already about casing progamme how to determine OD casing???