Well Calculator
Well
Volumes
Annulus
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Annulus
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Annulus
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Inside Casing
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Borehole
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Static Water
Water Column
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Water in Casing
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Cement / Bentonite
Seal Volume
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Seal Volume
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Cement (94 lb)
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Bentonite Chips (50 lb)
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Cement
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Bentonite
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Assumes one 94 lb bag of cement yields 1.00 ft³ and two 50 lb bags of bentonite chips fill 1.00 ft³.
Sand / Gravel Pack
Sand Pack
Sand
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Sand
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Gravel Pack
Feet of Gravel
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Gravel
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Gravel
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Tons Needed
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Gravel feet are calculated automatically as total depth minus feet of seal minus feet of sand. Default gravel conversion is 1.35 tons/yd³; change it when the supplier gives a different value.
Casing Details
Casing Type
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Actual OD
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Wall Thickness
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Casing ID
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Weight / ft
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Total Casing Weight
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Preparing offline copy…
Help / Install
Install on iPhone / iPad
1. Open this page in Safari.
2. Tap the Share button.
3. Select Add to Home Screen.
4. Tap Add.
2. Tap the Share button.
3. Select Add to Home Screen.
4. Tap Add.
Once installed and opened, the calculator can be used offline.
Found a bug or have a suggestion?
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well calculator v5.10
© 2026 browndrake tools
browndrake.com
© 2026 browndrake tools
browndrake.com