Maximum equivalent derrick load

Input(s)

$\mathrm{F}_{\mathrm{h}}$: Load Hoisted (lb)

n: No. of Lines Strung Between Crown Block and Traveling Block (unitless)

Output(s)

$\mathrm{F}_{\mathrm{de}}$: Maximum Equivalent Derrick Load (lb)

Formula(s)

$$ \mathrm{F}_{\mathrm{de}}=\left(\frac{\mathrm{n}+4}{\mathrm{n}}\right) * \mathrm{~F}_{\mathrm{h}} $$

Reference(s)

Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 11.