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.