Drill string design - Drill pipe length for bottomhole assembly

Input(s)

BF: Buoyancy Factor (dimensionless)

T: Tensile Strength for New Pipe (lb)

f: Safety Factor to Correct New Pipe to No. 2 Pipe Equal to 1-safety Factor of Pipe (fraction)

MOP: Margin of Overpull (lb)

$\mathrm{W}_{\text {bha }}$: Bha Weight in Air (lb)

$\mathrm{W}_{\mathrm{dp}}$: Drill Pipe $\mathrm{Wt}$ in Air including Tool Joint (lb)

$\mathrm{BHA}_{\mathrm{I}}$: Length of Bore Hole Assembly (dimensionless)

Output(s)

$\mathrm{L}_{\text {max }}$: Drill Pipe Length for a Specific Bore Hole Assembly (fraction)

Depth: Total Depth That Can be Reached with a Specific Bottomhole Assembly (ft)

Formula(s)

Reference(s)

Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, second edition, Gulf Professional Publishing, Page: 43.