Drilling EngineeringDrilling Hydraulics
New Pump Circulating Pressure Formula
New Pump Circulating Pressure calculates new circulating pressure for drilling hydraulics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (P_p, q_n, q_o) are known and the assumptions behind the cited drilling hydraulics relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, P_c equals 1,920 psi.
P_ppsi
3000
q_nspm
80
q_ospm
100
Inputs
P_p
psiPresent circulating pressure
q_n
spmNew pump rate
q_o
spmOld pump rate
Outputs
P_c
psi
New circulating pressure
P_p
psi
Present circulating pressure
q_n
spm
New pump rate
q_o
spm
Old pump rate
Source and review
reviewedFormulas and Calculations for Drilling, Production and Workover, Lapeyrouse, N.J. (2002)
Lapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Gulf Professional Publishing, Page 27.
Source