THESE ARE THREE MULTIPLE QUESTIONS, please help Which property is NOT correct for Churn flow in vertical tubing?

Group of answer choices

Gas bubbles coalesce further and begin to form a continuous path in the center of the tubing.

Gas velocity is high pushing liquid upwards, but liquid density is high causing counter$-$current liquid flow downward.

Flow is stable.

None of the above.

$3$:$36$ PM

There are two main types of tubing hydraulics calculations used by Production Engineers: Tubing Performance Calculations and Pressure Traverse Calculations. Pressure traverse calculations are based on a known flow rate, a known wellhead pressure and an unknown flowing bottom$-$hole pressure. Tubing performance calculations are based on a known flow rate and an unknown pressure drop.

Group of answer choices

True

False

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For single flow, which are the correlations that can be applied to liquid flow. $($Select all that apply$)$

Group of answer choices

Darcy$-$Weisbach

Weymouth

Panhandle $"$A$"$

Cullender and Smith

Hazen$-$Williams