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2. Special Well Control Applications. Underbalanced Drilling Well Control in Unconventional Hole Programs Casing and Cementing Operations. 3. Special Well Control Applications. Homework
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1. Lesson 23
Special Well Control Applications
Underbalanced Drilling (UBD)
2. 2 Special Well Control Applications Underbalanced Drilling
Well Control in Unconventional Hole Programs
Casing and Cementing Operations
3. 3 Special Well Control Applications
Homework # 12
On the Web
Due Dec 02, 2002
4. 4 Underbalanced Drilling (UBD) In drilling UBD wells the ECD is intentionally kept below the formation pore pressure.
5. 5 Reasons for UBD Minimize formation damage
Faster penetration rates
Longer bit life and fewer trips
Eliminating one or more casing strings
6. 6 Reasons for UBD Reduced risk of lost circulation
Reduced risk of differential sticking
Lower mud costs
Earlier oil sales
7. 7 Drilling Fluids used in Underbalanced Drilling Air and Natural Gas Drilling
Mist and Foam Drilling
Underbalanced Drilling w/Mud
8. 8