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Wellhead

Esteel        = 4.32 * 109 lb / ft2

Gsteel        = 1.73 * 109 lb / ft2

Do        = 2.500 ft

Di        = 1.500 ft

A        = π/4*(Do2-Di2) = 3.142 ft2

M        = (Psteel * A) * 148.5% (Wellhead structure) = 71.073 slugs /ft

ρ        = M / A = 22.623 slugs /ft3

Dd        = 2.500 ft

V        = (π/4*(Do2 -Di2)) * 148.5% (Wellhead structure) = 4.667 ft2

Db        = 2.438 ft