1. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Lesson 7 Foam Drilling Hydraulics Read: UDM Chapter 2.5 - 2.6 pages 2.75-2.130 MudLite manual Chapter 2 pages 2.1-2.14

2. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Foam Drilling Hydraulics Circulating pressures

3. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport

4. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport (Moore)

5. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport

6. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport

7. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport If flow is laminar, an increase in foam viscosity with increasing quality will dominate the reduction in foam density, and the terminal velocity will decrease with increasing foam quality, until the foam breaks down into mist

8. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport If the flow is turbulent, the terminal velocity is independent of the foams viscosity. The terminal velocity will increase with increasing foam quality due to reduction in density

9. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport For typical foam drilling conditions, flow past a 1/2” diameter cutting in a 60 quality foam at nearly 10,000’ was transitional. The terminal velocity was computed to be ~60 feet per minute

10. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Cuttings transport In transitional flow, the terminal velocity is sensitive to the density difference between the cutting and the foam, as well as the effective viscosity of the foam This is probably why foam does not show as much increase in cuttings transport capacity over water as might be expected from its viscosity

11. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures Strongly influenced by viscosity and quality. Both viscosity and quality change with changing pressure.

12. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

13. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

14. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

15. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

16. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

17. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

18. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

19. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

20. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

21. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

22. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

23. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

24. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Circulating pressures

25. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Injection Rates

26. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Injection Rates

27. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Injection Rates

28. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Injection Rates

29. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Injection Rates

30. ATMATM PETE 689 UBD ATMATM ATMATMATMATM Harold Vance Department of Petroleum Engineering Injection Rates