Duplex pump factor
Input(s)
\(\mathrm{D}_{\mathrm{L}}\): Piston Diameter (in.)
\(\mathrm{D}_{\mathrm{r}}\): Rod Diameter (in.)
\(\mathrm{L}_{\mathrm{S}}\): Stroke Length (in.)
Output(s)
\(\mathrm{PF}_{\mathrm{d}}\): Duplex Pump Factor (bbl/stroke)
Formula(s)
\[
\mathrm{PF}_{\mathrm{d}}=\frac{3.1415 * \mathrm{~L}_{\mathrm{S}} *\left(\left(2 * \mathrm{D}_{\mathrm{L}}^{2}\right)-\mathrm{D}_{\mathrm{r}}^{2}\right)}{2 * 9702}
\]
Reference(s)
Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 84.