Wait and Weight Pressure Drop over Stroke Interval Formula
Wait and Weight Pressure Drop over Stroke Interval calculates drill pipe pressure drop over stroke interval for well control workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (ICP, FCP, S_interval, S_bit) are known and the assumptions behind the cited well control 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, dP_interval equals 46.566792 psi.
1600
1227
200
1602
Inputs
ICP
psiInitial Circulating Pressure
FCP
psiFinal Circulating Pressure
S_interval
strokesSchedule Stroke Interval
S_bit
strokesSurface-to-Bit Strokes
Outputs
dP_interval
Drill Pipe Pressure Drop over Stroke Interval
ICP
Initial Circulating Pressure
FCP
Final Circulating Pressure
S_interval
Schedule Stroke Interval
S_bit
Surface-to-Bit Strokes
Source and review
reviewedDrillingFormulas.com. Drill Pipe Pressure Schedule Calculation for Wait and Weight Well Control Method; IADC WellSharp Formula Sheet, field units, pressure reduction schedule rounding guidance.
Source