Effective weight during drilling

Input(s)

$\mathrm{w}_{\mathrm{s}}$: Weight of Drillstring Material (lbs)

$\rho_{\mathrm{o}}$: Density of Mud (ppg)

$\rho_{\mathrm{s}}$: Density of Drillstring Material (ppg)

Output(s)

$\mathrm{w}_{\mathrm{o}}$: Effective Weight (lbs)

Formula(s)

$$ \mathrm{w}_{\mathrm{o}}=\mathrm{w}_{\mathrm{s}} *\left(1-\left(\frac{\rho_{\mathrm{o}}}{\rho_{\mathrm{s}}}\right)\right) $$

Reference(s)

Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 26.