Applications
- Assesing donwhole flowrate
Sample Logs
Tool Schematic
Mathematical Model
| f^{+}_{FBS}(z) = S^{+}_{\rm slope} \cdot ( v_{\rm FLOW}(z) - v^{+}_{LSPD}(z) - v^{+}_{th}) |
| f^{-}_{FBS}(z) = S^{-}_{\rm slope} \cdot ( v_{\rm FLOW}(z) - v^{-}_{LSPD}(z) - v^{-}_{th}) |
where S_{\rm slope} is some constant depending on tool construction and well completion , v_{th} a critical value of the flow speed which can initiate spinner rotation, v – flow velocity.