Flow Drilling
Assessment
1. In flow drilling, underbalanced conditions are created using:
A .gas-only drilling fluid.
B .liquid-only drilling fluid. ✔
C .gasified-liquid drilling fluid.
2. Rotating control heads are designed to operate at working pressures up to:
A .500 psi
B .1,000 psi
C .2,500 psi ✔
D .10,000 psi
3. Flow drilling is a popular method for horizontal wells since the formation pressures are more or less within a constant pressure gradient range.
A .True ✔
B .False
4. It is NOT always possible to maintain the desired underbalance at the sandface during flow-drilling.
A .True ✔
B .False
5. One float in every __ is a rule of thumb used by the industry.
A .five joints
B .twelve joints ✔
C .twenty joints
6. In flow-drilling operations, a safe operating backpressure is maintained by using:
A .a booster
B .a standpipe
C .a choke manifold ✔
D .a rotating control head
7. Which of the following is NOT a type of rotating BOP?
A .Active type
B .Passive type
C .Sliding type ✔
8. What type of cement needs to be used to maintain underbalanced conditions while cementing the casing?
A .Foamed cement ✔
B .Low heat cement
C .Sulfate resistant Portland cement
9. What type of drilling fluid is needed in deviated and horizontal well drilling to obtain adequate hole cleaning?
A .Low viscosity
B .High viscosity ✔
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