Well Cleanup Calculator
Calculate wellbore volume, total pumping volume, circulation time, and bottoms-up time for well cleanup operations.
Wellbore Parameters
Annular Vol = (Hole_ID^2 - Pipe_OD^2) / 1029.4 * Depth (bbl)
String Vol = Pipe_ID^2 / 1029.4 * Depth (bbl)
Bottoms-up Time = Annular Vol / Pump Rate
Results
Annular Volume
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String Volume
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Total Wellbore Volume
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Total Volume to Pump
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Bottoms-Up Time
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Total Circulation Time
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Additional Details
How this was calculated
Annular volume: V_ann = (Hole_ID^2 - Pipe_OD^2) / 1029.4 * Depth. The 1029.4 converts in^2*ft to barrels.
String volume: V_string = Pipe_ID^2 / 1029.4 * Depth.
Bottoms-up time: Time for fluid to travel from bottom to surface via the annulus = V_annular / pump_rate.
Total volume to pump: Total_wellbore_volume * Number_of_circulations. Typically 2-3 circulations needed.
Need help with well completion design, cleanup optimization, or fluid program planning?
Book a free strategy call →Understanding Well Cleanup Operations
Well cleanup is critical after drilling, completion, or workover operations to remove debris, cuttings, and contaminants before production. Insufficient cleanup leads to formation damage and reduced productivity.
The bottoms-up time tells you how long to circulate before seeing returns from the bottom. Multiple circulations (typically 2-3) ensure adequate hole cleaning. The annular velocity determines cleaning efficiency; minimum 100-120 ft/min is recommended for vertical wells.
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