Common Drill Collar and Tubular Displacement Volumes

Common Drill Collar and Tubular Displacement Volumes

Displacement volumes per joint of commonly used drill collars and tubulars:

9″ drill collar volume per joint = 0.98 m³
8″ drill collar volume per joint = 0.77 m³
7″ drill collar volume per joint = 0.56 m³
6-1/4″ drill collar volume per joint = 0.43 m³
6-3/4″ drill collar volume per joint = 0.25 m³
5″ heavy-weight drill pipe volume per joint = 0.26 m³
3-1/2″ heavy-weight drill pipe volume per joint = 0.13 m³
5″ drill pipe volume per joint = 0.12 m³
5-1/2″ drill pipe volume per joint = 0.155 m³
3-1/2″ drill pipe volume per joint = 0.086 m³
2-3/8″ drill pipe volume per joint = 0.038 m³
3-1/2″ drill collar volume per joint = 0.137 m³
3-3/4″ drill collar volume per joint = 0.23 m³

Inner Volume per Meter:

5″ drill pipe (OD 127 mm, wall thickness 9.19 mm, ID 108.6 mm) inner volume = 0.00926 m³/m
5-1/2″ drill pipe (OD 139.7 mm, wall thickness 10.54 mm, ID 118.6 mm) inner volume = 0.01105 m³/m
3-1/2″ drill pipe (OD 88.9 mm, wall thickness 11.00 mm, ID 67.00 mm) inner volume = 0.00353 m³/m
6-1/4″ drill collar (OD 158.75 mm, ID 71.44 mm) inner volume = 0.00401 m³/m
6-3/4″ drill collar (OD 171.45 mm, ID 71.44 mm) inner volume = 0.00401 m³/m
4-3/4″ drill collar (OD 120.65 mm, ID 57.15 mm) inner volume = 0.00257 m³/m

Inner and Outer Volume per Meter:

9-5/8″ casing (OD 244.5 mm, wall thickness 11.99 mm, ID 220.50 mm) inner volume = 0.03819 m³/m, outer volume = 0.04695 m³/m
7″ casing (OD 177.8 mm, wall thickness 11.51 mm, ID 154.79 mm) inner volume = 0.01882 m³/m, outer volume = 0.02480 m³/m

Annular Volume Calculation:

Annular volume = 7.854 × 10^-7 × (wellbore diameter² – casing OD²)

Displacement Calculation:

Displacement volume = 7.854 × 10^-7 × (outer diameter² – inner diameter²)

Unit Inner Volume Calculation:

Unit inner volume = 7.854 × 10^-7 × inner diameter²