Drilling String Displacement Formula |
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\( DS_d \;=\; \dfrac{ ( D_{pod}^2 - D_{pid}^2 ) \cdot l }{ 1029.4 }\) (English) \( DS_d \;=\; \dfrac{ ( D_{pod}^2 - D_{pid}^2 ) \cdot l }{ 1273.24 }\) (Metric) |
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| Symbol | English | Metric |
| \( DS_d \) = Drillstring Displacement | \( bbl \) | \( l \) |
| \( D_{pod} \) = Casing / Drill Pipe OD | \(in\) | \( mm \) |
| \( D_{pid} \) = Casing / Drill Pipe ID | \(in\) | \( mm \) |
| \( l \) = Length of Drill Hole | \(ft\) | \( m \) |
Drilling string displacement, abbreviated as DSD, is when either pulling out of a hole or trip in a hole for any kind of pipes such as drill pipe, casing or tubing, you should know how much fluid to displace the volume of the drillstring.
