|
| Fig. 1. Single-barrier well completion schematic |
The Heat Transfer Coefficient (HTC) of dual-barrier well completion is defined by the following equation:
\frac{1}{ r_{ci} \, U} = \frac{1}{r_{ci} \, U_{ci}} + \frac{1}{r_{ci} \, U_c} + \frac{1}{r_c \, U_{cem}} |
where
outer radius of the casing | |
inner radius of the casing | |
| casing wall thickness | |
| wellbore radius by drilling bit | |
| Casing Wall Conductive Heat Transfer Coefficient | |
| Cement Conductive Heat Transfer Coefficient | |
| thermal conductivity of fluid moving through the tubing | |
| thermal conductivity of casing material | |
| thermal conductivity of cement |
The equation can be written explicitly as:
\frac{1}{ r_{ti} \, U} = \frac{2}{\lambda \, {\rm Nu}_{ci}} + \frac{1}{\lambda_c} \ln \frac{r_c}{r_{ci}} + \frac{1}{\lambda_{cem}} \ln \frac{r_w}{r_c} |
See also
Physics / Thermodynamics / Heat Transfer / Heat Transfer Coefficient (HTC) / Heat Transfer Coefficient (HTC) @model
[ Dual-barrier well completion Heat Transfer Coefficient @model ]
[ Thermal conductivity ] [ Nusselt number (Nu) ]