Chuong 5d flow patterns

1

Well Drilling Engineering

Flow Patterns & Frictional

Pressure Losses

Dr. DO QUANG KHANH

2

 Laminar Flow in Wellbore

 Fluid Flow in Pipes & Annuli

 The Slot Flow Approximation

 Shear Rate Determination

 Frictional Pressure Loss

 Turbulent Flow in Wellbore

 Turbulent Criteria

 Frictional Pressure Loss

 Pump Pressure

3

Read:

Applied Drilling Engineering

Ch.4

HW #

ADE 4.40, 4.41, 4.42

4

Laminar Flow in Wellbore

Fig. 4-26. Velocity profiles for laminar flow:

(a) pipe flow and (b) annular flow