Related Resources: calculators

Annular Capacity Flow Casing Formula and Calculator

Fluids Flow Design and Engineering
Hydraulic & Pneumatic Design Engineering
Pressure Vessel Pipes Design Engineering ASME

Annular Capacity Between Casing or Hole and Drill Pipe, Tubing, or Casing Formula and Calculator

Eq. 1
Annular Capacity bbl/ft

C_a = ( Dh² - Dp² ) / 1029.4

Eq. 2
Annular Capacity ft/bbl

C_a = 1029.4 / ( Dh² - Dp² )

Eq. 3
Annular capacity, gal/ft

C_a = ( Dh² - Dp² ) / 24.51

Eq. 4
Annular capacity, ft/ga

C_a = 24.51 / ( Dh² - Dp² )

Eq. 5
Annular capacity, ft³/Iinft

C_a = ( Dh² - Dp² ) / 183.35

Eq. 6
Annular capacity, linft/ft³

C_a = 183.35 / ( Dh² - Dp² )

Where:
C_a = Annular capacity
Dh =Casing or Hole size ID (in.)
Dp = Drill pipe OD (in.)

Source:

Reference: Lapeyrouse, N. J., 2012, Formulas and Calculations for Drilling, Production and Workover, Third Edition

Related

• Orifice Plate Flow Calculations and Design
• Orifice Plate Type Flow Detector Review
• Orifice Submerged in Liquid Discharge Rate Calculator and Equation
• Pipe Friction Equations Within Pipe For Fluid Flow
• Pressure Drop Along Pipe Length - Fluid Flow Hydraulic and Pneumatic
• API Casing Data Tables Sizes 11.750 - 13.375
• API Casing Data Tables sizes 5.00 - 5.50
• API Tubing Grade & Specifications
• API Casing Data Tables Sizes 7.000 - 7.625
• Flow Capacity Pipe and Tubes ANSI Schedule 40 Air
• Pipe Flow Gradual Size Enlargement Formula and Calculator
• Velocity and Flow Capacity of Oil Schedule 80 Pipe
• Hazen-Williams Equation for Pipe Friction and Pressure Drop - Fluid Flow Hydraulic and Pneumatic