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:<math>\mbox{P}_{\rm oil\ grad} = \rho_{\rm oil} \times 0.433 \mbox{ psi/ft}</math>
 
:<math>\mbox{P}_{\rm oil\ grad} = \rho_{\rm oil} \times 0.433 \mbox{ psi/ft}</math>
   −
<break> </break> where:
+
where:
 
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* P<sub>oil grad</sub> = oil pressure gradient  
* <sup>P</sup><sub>oil grad</sub> = oil pressure gradient * ρ<sub>oil</sub> = oil density
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* &rho;<sub>oil</sub> = oil density
 
   
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