Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Reference texts: Bourgoyne, A.T. Jr., Millheim, K.K., Chenevert, M.E. & Young, F.S., Applied Drilling Engineering, SPE Textbook Series (hoisting-system design, bit economics, well control, drill-string design, directional drilling); Rabia, H., Well Engineering & Construction (drill-string tension design, casing/tubular wear classification); Alberta Energy Regulator, Directive 010: Minimum Casing Design Requirements (Canadian regulatory context for tubular design margins).