1. What is the main purpose of BOP equipment?
a- To provide a hydraulic barrier against unplanned flow between the drillstring and casing
b- To provide a mechanical barrier against unplanned flow to surface during well operations
c- To provide a mechanical barrier to prevent dropped objects falling into the well
d- To provide a mechanical seal to pressure test the casing and wellhead.
2. What type of well barrier elements are required to form a barrier envelope?
a. A combination of well barrier elements that prevent flow to the environment or to an open formation.
b. A combination of well barrier elements to prevent flow into open formation.
c. Several BOP rams to prevent flow to the environment.
3. What is the meaning of well-barrier envelope?
a. All Mechanical barrier.
b. Use the mud with surface pressure to prevent intrusion of formation fluids to the well.
c. It is a combination of barriers that prevent the intrusion of formation fluids to the well, to another formation or to the atmosphere
d. The use of over balance to prevent intrusion of formation fluid to the well.
4. Which correct action should be taken if a well barrier fails while testing, as per API Standard RP 53?
a. Tightening, Repair or any other work must be done under pressure then retest it again.
b. It is not important neither to pressure test this barrier after fixing the problem nor the corrective action.
c. Bleed off pressure to half pressure, repair and pressure test it.
d. Tightening, Repair or any other work must done only after verification that all pressure is released and all parties are agreed that no chance of trapped pressure.
5. What should you do if an annular BOP fails its pressure test?
a- No action is required if the rams are successfully tested.
b- You do not need to retest it until the next planned test date
c- You should remove the annular from service
d- You should repair it immediately and then re-test it
6. Who is authorized to sign the test chart?
a. Mechanic
b. Pump operator, drilling contractor representative and operator represantative.
c. BOP engineer
d. Electrician
e. Driller or Senior Tool Pusher
7. Which of the following is necessary to maintain primary well control during tripping?
a- The hydrostatic pressure exerted by the drilling mud column must remain higher than the formation pressure
b- Mud pumps must be in good working order
c- A minimum of one inside blowout preventer (IBOP) must be available on the drill floor
d- The level in the active tank must be constant
8. From A well control point of view, what is the primary reason for performing a check trip followed by bottoms up circulation?
a. To verify that the pressure surge during the running in of the pipe will not lead to lost circulation
b. To reduce the thickness of the filter cake
c. To cool the drilling bit
d. To verify that the primary well control can be maintained during the pulling of the pipe.
9. What is the correct definition of “primary well control” during normal drilling operation?
a- Preventing a kick by maintaining drilling mud hydrostatic pressure equal to or greater than formation pressure.
b- Preventing the flow of formation fluid into the well bore by maintaining the sum of drilling mud hydrostatic pressure and dynamic pressure loss in the annulus equal to or greater than formation pressure.
c- Preventing the flow of formation fluid into the well bore by keeping the dynamic pressure loss in the annulus equal to or greater than formation pressure.
d- Preventing the flow of formation fluid into the well bore by using BOP equipment when the hydrostatic pressure in the well bore does not balance or exceed the formation pressure.
10. Which statement describe the secondary well barrier?
a- A secondary well barrier is the secondary object that prevents flow from a source
b- A secondary well barrier will not prevent flow from a source
c- A secondary well barrier controls the closure of blow out preventer
d- A secondary well barrier is the first object that prevents flow to well bore.
11. Pressure has built up between two casing strings in a well, a poor cement job has been performed on the inner casing string, what could the consequences of this pressure build-up be? (THREE ANSWERS)
a- The inner casing could collapse
b- The ECD will increase
c- These could be different sticking
d- The formation below the outer casing shoe could fracture
e- The outer casing could burst
12. A cement bond log (CBL) showed that there is a bad cement job between two casing strings. What is the immediate effect of a bad cement job?
a- The inner casing could collapse
b- The ECD will increase
c- These could be different sticking
d- The formation below the outer casing shoe could fracture
e- The outer casing could burst
ANSWERS
1. B 5. D 9. A
2. A 6. B 10. A
3. C 7. A 11. A-D-E
4. D 8. D 12. A-D-E
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