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Subsea Well Control Practice Quiz

If you are about to start killing a well on an offshore deep water rig and ignore the recorded 245 psi choke line friction and come on choke holding casing pressure constant, bottom hole pressure will
Increase
Decrease
Stay the Same
The well has been shut in on a floating rig and the choke line is full of 8.3 ppg fresh water. Calculate the SICP if the choke line was filled with mud instead of water. Distance from BOP to the rig floor is 2000 feet. Density of the mud in the well is 10.2 ppg. SICP is 1050 psi with water in the choke line
198 psi
1248 psi
652 psi
852 psi
In order to take CLFP, the driller circulated down the drill string and up the riser at 40 spm and recorded 800 psi. The Driller then closed the Annular and circulated at 40 spm down the string and up the choke line with the choke wide open and recorded 1050 psi. From the BOP stack to the rig floor is 4000 feet. The choke line friction pressure is:
250 psi
350 psi
800 psi
1050 psi
In deep water wells hydrates can be trouble as they can become a solid frozen
Mixture of oil and gas
Mixture of gas and ethanol
Mixture of water and gas
Mixture of carbon and gas
A deep water drill ship is operating in 9000 feet of water. The riser has a 19.875” I.D. and the choke and kill lines are 4.5” I.D. Pump output is .109 bbs/stk. Calculate the strokes to displace the choke line only with lower density fluid after the well has been killed
177 strokes
1624 strokes
23,443 strokes
27,444 strokes
Accumulator bottles on a subsea stack are not pre-charged to the same pressure as on a surface stack. With a BOP stack in a water depth of 3000 feet, what would the pre-charge pressure be adjusted to? Surface pre-charge pressure = 1000 psi. Sea Water is .445 psi/ft
2335 psi
1567 psi
1335 psi
1000 psi
The choke line friction pressure on an 8500 water depth rig is 300 psi with 11 ppg. If the well was shut in with 400 psi on the SIDPP and 650 psi SICP, what would the casing pressure be by the time you get to the ICP
650 psi
950 psi
700 psi
350 psi
The mud weight increase to compensate for the loss of the riser is called
Slug weight
Riser Tension
Riser Margin
U-Tube
Water depth is 2000 feet. Well TVD is 3000 feet. Air gap is 90 feet. Sea Water density is 8.5 ppg. Mud weight is 10 ppg. Calculate the reduction in Bottom Hole Pressure if the riser is disconnected at the well head housing on the seafloor
46.7 psi
202.8 psi
335.7 psi
500 psi
Water depth is 2000 feet. Well TVD is 3000 feet. Air gap is 90 feet. Sea Water density is 8.5 ppg. Mud weight is 10 ppg, calculate the minimum fluid density that will keep the well balanced with the riser disconnected
8.5 ppg
11.3 ppg
14.1 ppg
14.3 ppg
If drilling on a floater and a gas kick occurs, you should divert the well
Upwind overboard
Downwind overboard
To the shale shakers
To the Gas Buster
On a subsea well kill, you start to bring the pump up to kill rate and keeping the choke pressure constant at the original SICP minus the calculated CLFP. When the pump is up to kill rate speed, which gauge do you then follow to keep bottom hole pressure just above formation pressure? (1st circulation of Driller's method)
Casing gauge on the remote choke control panel
Drill pipe gauge on the standpipe
Drill pipe gauge on the remote choke control panel
Casing gauge on the driller’s control panel
Which of the following operations will create the highest equivalent circulating density?
Circulating down the drill pipe and taking returns up the riser
Circulating down the drill pipe and taking returns up the choke line
Circulating down the drill pipe and taking returns up both the choke line and kill lines
After successfully closing in a well on a deep water floater, the driller now has the annular and choke closed and the fail safe open. The next step for the driller to do is
Calculate kill weight mud
Check for leaks and notify the company man
Hang off the drill string and monitor the well pressures and notify supervisor
Line up for a choke line friction test
After circulating a gas kick on a deep water drill ship in 5000 feet of water, you should not
Open the BOP’s to check for flow
Circulate or sweep gas from the stack
Displace the riser with kill weight mud
Check pressures, volumes, and make sure well is killed
Fail safe valves on a subsea stack are made so that if it fails, it
Stays open
Closes
Sends a signal to the Driller
None of the above
Which of the following statements is correct regarding pilot fluid?
Pilot fluid vents to the sea bed
Pilot fluid operates the SPM valves
Pilot fluid flows to BOP fuctions
On a deep water floater, this automatically activates the shear rams when there is a catastrophic loss of the riser system
Dead Man System
Close in procedure for the Driller to activate
ROV Rescue System
When should drillers take CLFP?
When BHA is changed
Every 500 ft
When pump output is changed
Every time they take SCRP
The Driller has closed the well in on a deep water floater, but flow continues to come out the riser and down the flow line into the pits. What is the next action the Driller may want to do?
Ignore the flow and prepare a kill sheet
Monitor the flow and be ready to open overboard line and close diverter
Be ready to open BOP’s and pump water into the riser
This is a bonus question, What is your name and what company do you work for?
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