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.