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Lesson 23

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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Lesson 23

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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

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