The friction pressure is pressure loss when fluid flowing through flowing paths and it acts in opposite direction of fluid flow. The following factors affect the friction pressure:
• Drilling string geometry both inside diameter and outside diameter
• Fluid Properties: Rheology and density
• Geometry of wellbore: hole length, wellbore area and flow area
• Wellbore condition such as packing off, bridging, etc
• Flow Rate
• Pipe movement and pipe rotation
The figure below demonstrates you how the friction act in wellbore.
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June 10th, 2010 at 9:24 pm
How do you calculate friction pressure?
June 11th, 2010 at 9:34 am
You can use the computer to model it. I’ve seen some fluid models using to calculate the friction pressure.
July 5th, 2010 at 11:14 am
[...] still apply the concept of frictional pressure so reverse circulation is calculated by this following [...]