Changes

}}

}}

==Calculation==

==Calculation==

 

The maximum column of hydrocarbons that can accumulate under a seal occurs when ''P''_b equals ''P''_d. If ''P''_b exceeds ''P''_d, the hydrocarbons will leak through the seal. If ''P''_b is less than ''P''_d, it would be possible to seal a greater column of hydrocarbons.

The maximum column of hydrocarbons that can accumulate under a seal occurs when P_b equals P_d. If P_b exceeds P_d, the hydrocarbons will leak through the seal. If P_b is less than P_d, it would be possible to seal a greater column of hydrocarbons.

Therefore, for the maximum hydrocarbon column

Therefore, for the maximum hydrocarbon column

:<math>\mbox{P}_{\rm b}  = \mbox{P}_{\rm d}</math>

:<math>P_{\rm b}  = P_{\rm d}</math>

:<math>(\rho_{\rm w} - \rho_{\rm h}) \mbox{gh} &= \frac{2\gamma \cos \theta}{\mbox{R}}\\\mbox{h} &= \frac{\left(\displaystyle\frac{2\gamma \cos \theta}{\mbox{R}}\right)}{(\rho_{\rm w} - \rho_{\rm h})}\mbox{g}</math>

:<math>(\rho_{\rm w} - \rho_{\rm h}) \mbox{g} h = \frac{2\gamma \cos \theta}R</math>

:<math>h = \frac{\left(\displaystyle\frac{2\gamma \cos \theta} R \right)}{(\rho_{\rm w} - \rho_{\rm h})\mbox{g}}</math>

or, in mixed units,

or, in mixed units,

:<math>\mbox{h} = \left(\frac{\mbox{P}_{\rm d}}{\rho_{\rm w} - \rho_{\rm h}}\right) 0.433</math>

:<math>h = \left(\frac{P_{\rm d}}{\rho_{\rm w} - \rho_{\rm h}}\right) 0.433</math>

where:

where:

* h = height of the hydrocarbon [[length::( ft]])

* ''h'' = height of the hydrocarbon [ft]

==Effect on seal capacity==

==Effect on seal capacity==