I would like to reiterate:
The wellbore temperature is 180oC at the bottom, the water pumped is at 10oC and we want to cool the tool to 70oC. Heat transfer will be between water and coil tubing (convection) then from the coil to the water on the annulus (outside) of the coil (also convection)...
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Hey I'm looking to solve a pumping problem: A downhole tool needs to be cooled by pumping water from surface through 73mm coil tubing in 7 inch casing. The tool operates with 180oC max (downhole condition), we want to cool it to 70oC, pump through coil tubing...
