1 . You have taken a 10-bbl kick with 500 psi shut in drill pipe pressure and 900 psi shut in casing pressure. The mud weight is 13 PPG and the TVD is 10,000 ft. You are unable to circulate the kick out due to power failure. After 1 hour the driller notices that both the drill pipe and the annulus pressures have increased by 100 psi. We decide to let the influx come to surface without circulation.
1.1) What will happen to the casing pressure as we do this?
a) Decrease
b) Increase .
c) Stay the same.
1.2) What will happen to the casing shoe pressure as we bring the influx up towards the shoe?
a) Decrease
b) Increase .
c) Stay the same.
1.3) What will happen to the pressure inside the influx?
a) Decrease .
b) Increase
c) Stay the same.
1.4) What will happen to the bottom hole pressure?
a) Decrease
b) Increase
c) Stay the same .
1.5) In this situation the influx is probably:
a) Impossible to tell
b) Salt water
c) Fresh water
d) Gas
1.6) It seems that the kick is:
a) Staying on bottom
b) Coming to surface
c) Breaking down the shoe
d) Expanding around the drill collars.
1.7) If we cannot circulate, we can bring the influx to surface by:
a) Keeping the casing pressure constant at 900 psi
b) Keeping drill pipe pressure constant at 900 psi
c) Keeping casing pressure constant at 500 psi
d) Keeping drill pipe pressure constant at 500 psi
2. List 5 warning signs that could indicate a potential kick while drilling. NOTE: 2 of these might only be seen if the kick was already of a large volume
3. Consider the following two pressure tests of an annular preventer :
Choose the single best answer from the following:
a. Generally speaking test a. and test b. are both acceptable.
b. Generally speaking test a. and test b. are both unacceptable.
c. Generally speaking test a. is acceptable and test b. is not.
d. Generally speaking test b. is acceptable and test a. is not.
4. If a ram type preventer is operated closed, what happens to the accumulator fluid on the open side of the operating cylinders? Describe the path of the open side fluid in some detail for this situation.
5. What items must be readily available for use and easily accessible to the drill floor workers in case the well needs to be shut in during tripping?
6. While drilling in the open hole what position must the BOP control function 4-way valves on the accumulator never be left in?
7. What is the bypass on the accumulator for? What position should handles of 4-way valves be in and why?
8. What effect will reciprocating casing have on down-hole pressures?
What effect will reciprocating casing have on annular velocities?
Based on these two ideas, how will you manage casing reciprocating practices?
Answers
1. You have taken an 10 bbls kick…..
1.1) b) Increase
1.2) b) Increase
1.3) a) Decrease
1.4) c) Stay the same.
1.5) d) Gas
1.6) b) Coming to surface
1.7) c) Keeping drillpipe pressure constant at 500 psi
2. List 5 warning signs……..
- ROP increase.
- Temperature increase.
- D exponent increase.
- Gas cut mud.
- Increase in string weight. After large kick is taken
- pump circulating pressure reduction. After large kick is taken
3. c. Generally speaking test a. is acceptable and test b. is not.
4. Oil flow will return back to the 4 way valve and from there it will go back into the reservoir.
5. Full opening safety valves with key's, Stab-in valve (Gray valve), Cros over(X/over) for DC to safety valve size.
6. Never in the neutral position. Leaking of the 4 way valves can close the rams while drilling.
7. To increase the manifold pressure for Shear-rams or to increase the closing pressure for every ram. Open or close.
8. Reciprocating down will have positive pressure surges (increase in ECD), and up will be negative(swab pressure).
On the down stroke, annular velocity will increase enhancing the pressure surge. Casing may be moved relatively faster (swab considerations) on the up stoke.
Casing must be lowered relatively slowler on the down stroke. “Do” reciprocation with care and control the speed.
0 Response to "General Questions With Answers - 9 -"
Post a Comment