Drilling EngineeringDrilling Hydraulics
Pump Pressure from Bit Drop and Friction Losses Formula
Pump Pressure from Bit Drop and Friction Losses calculates pump pressure for drilling hydraulics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (dP_bit, P_d) 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_p equals 3,000 psi.
dP_bitpsi
1200
P_dpsi
1800
Inputs
dP_bit
psiBit pressure drop
P_d
psiFrictional pressure losses
Outputs
P_p
psi
Pump pressure
dP_bit
psi
Bit pressure drop
P_d
psi
Frictional pressure losses
Source and review
reviewed501 Solved Problems and Calculations for Drilling Operations, Robello, S.E. (2015)
Samuel, E. Robello. 501 Solved Problems and Calculations for Drilling Operations, Sigma Quadrant, Houston, Texas, 2015, Page 69.
Source