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Drilling EngineeringWell ControlCalculation record

Constant Bottomhole Pressure Bleed Volume for Rising Gas Calculator

Vbleed=ΔPstepCaGV_{bleed}=\frac{\Delta P_{step}C_a}{G}

Enter the declared drilling engineering inputs below to solve V_bleed. Variable definitions, units, the default calculation, and the available source trail are included on this page.

Tabular solver

Inputs

Defaults provide a quick field-unit example for the equation.

3 variables

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Extended guidance in preparation

What is available in this record

This record provides the functioning calculator, formula, declared variables and units, a reproducible default result, and the available citation metadata. A separately written engineering interpretation has not yet been published for this calculation.

Formula reference

Formula, variables, and default calculation

Vbleed=ΔPstepCaGV_{bleed}=\frac{\Delta P_{step}C_a}{G}

Reproducible default result

With the default values shown below, the calculation returns V_bleed = 20.769231 bbl. Defaults demonstrate the implementation; they are not recommended field values.

dP_steppsi

100

C_abbl/ft

0.1458

Gpsi/ft

0.702

Input definitions

dP_step

psi

Allowed Casing Pressure Increase Step

C_a

bbl/ft

Hole or Annular Capacity

G

psi/ft

Mud Gradient

Output definitions

V_bleed

bbl

Bleed Volume for Constant Bottomhole Pressure

dP_step

psi

Allowed Casing Pressure Increase Step

C_a

bbl/ft

Hole or Annular Capacity

G

psi/ft

Mud Gradient

Source and record status

Source metadata identifies the relationship implemented by the calculator. Check the cited edition, unit basis, and scope against the engineering case before operational use.

reviewed

Lapeyrouse, N.J. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Page 142.

Open source reference