Hydrostatics Buoyancy Pipe Tension vs Depth Effect of Mud Pressure Laminar and Turbulent Flow Pressure Drop Calculations

Wellbore Hydraulics

 

• Hydrostatics
• Buoyancy
• Pipe Tension vs. Depth
• Effect of Mud Pressure
• Laminar and Turbulent Flow
• Pressure Drop Calculations –Bingham Plastic Model –API Power-Law Model
• ...

 

Axial Tension in Drill String

Example

A drill string consists of

10,000 ft of 19.5 #/ft drillpipe and

600 ft of 147 #/ft drill collars

suspended off bottom in 15#/gal mud

(Fb = bit weight = 0).

• What is the axial tension in the drillstring as a function of depth?