Well Control Equipment – Blowout Preventers and Diverters.
a collection of Well Control Questions and Answers
1) Indicate the activities that may be carried out wih the BOP stack shown.
a) With no drill pipe in the hole, shut in the well under pressure and repair the spool.
b) With drill pipe in the hole, shut the well in and change pipe rams to blind rams.
c) With drill pipe in the hole, circulate through the drill pipe.
d) With drill pipe in the hole, shut in the well under pressure and repair the side outlets on
the spool .
Answer:
a)No.
B)No.
C)Yes.
C)Yes.
2) What is the primary function of the weep hole (drain hole, vent hole) on a ram type BOP?
a) To show that ram body rubber is leaking.
b) To show that the primary mud seal on the piston rod is leaking.
c) To show that the Bonnet seals are leaking.
d) To show that the closing chamber operating pressure is too high.
Answer: b
3) You only have one inside BOP with an NC 50 (4”1/2 IF) lower pin connection on your rig but the drill string consist of 5” HWDP, and 8” collars. Which one of the following crossovers would you have on the drill floor in case of kick while tripping?
a) 6-5/8” reg. Box X 7-5/8” reg. Pin
b) NC50 (4-1/2” IF) Pin X 6-5/8” reg. Pin
c) NC50 (4-1/2” IF) Box X 7-5/8” reg. Pin
d) NC50 (4-1/2” IF) Box X 6-5/8” reg. Pin
Answer: d
4) A BOP stack is configured: Pipe ram / Blind-Shear ram / Pipe ram / Annular, kill and choke lines are connected under the blind-shear rams. Is it possible to kill a well using the Driller’s method if;
a) The upper pipe rams are closed?
b) The blind shear rams are closed?
c) The lower pipe rams are closed?
Answer:
a) Yes
b) Yes
c) No
5) A BOP stack is configured: Pipe ram / pipe ram / Blind-Shear ram / Annular, kill and choke
lines are connected under the blind-shear rams.
a) Can you repair the side outlets with pipe in the hole?
b) Can you repair the outlets with no pipe in the hole?
c) Is it possible to shut in with drill pipe in the hole and
circulate through the drill pipe?
d) Can you change blind rams to pipe rams and kill the well?
Answer:
a) Yes
b) No
c) Yes
d) Yes
6) A BOP stack is configured: Drilling spool / Pipe ram / Blind-Shear ram / Annular, kill and choke lines are connected to the drilling spool.
a) With drill pipe in hole, can we repair the side outlets?
b) With no drill pipe in the hole, can you shut in and repair the Drilling spool?
c) With drill pipe in hole, can you circulate through the Drilling spool?
Answer:
a) No
b) No
c) Yes
7) The kill line should enter a stack so that
a) The well can be circulated if the blind rams are in use.
b) The well can be circulated if the pipe rams are being used.
c) Both the above.
Answer: c
9) Which of the following statements are true concerning Ram Packing Elements?
a) Reciprocating motion of the pipe increases the wear on seals.
b) Closing pipe rams on open hole may damage the elements.
c) The ram packer should normally be checked, and if worn, changed whenever the bonnet is opened.
d) All of above.
Answer: d
Read also Drilling Company Exam – Questions and Answers
10) What do the term “6BX” stamped on a flange represent?
a) serial number
b) pressure rating
c) type
d) size
Answer: c
11) What is meant by the closing ratio for a ram type BOP?
a) Ratio between closing & opening volume.
b) Ratio between closing & opening time.
c) Ratio of the wellhead pressure to the pressure required to close the BOP.
Answer: c
12) Which option gives the advantage of using the kill line with static fluid to monitor well head pressure during a well kill operation?
a) Response on changes in well head pressure is quicker through the kill line.
b) Effect of choke line friction is reduce to ¼ when monitoring on kill line gauge during the
kill operation.
c) Effect of choke line friction is reduced to ½ when monitoring on kill line gauge during the
kill operation.
d) The kill line pressure can be kept constant while changing the pump speed, thus
eliminating the need to compensate for CLFL.
Answer: d
15) Identify the one ram locking device from the list below that locks the ram in the same position regardless of wear.
a) Shaffer “Ultralock”
b) Shaffer “Poslock”
c) Hydril “MPL”
d) Cooper(Cameron) “Wedgelock”
e) Koomey “Autolock”
Answer: b
16) From the list below, identify the ring gaskets that are pressure energized. (Pick four answers)
a) Type RX
b) Type BX
c) Type AX
d) Type R oval
e) Type R octagonal
f) Type CX
Answer: a, b , c , f
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17) Which dimension from the list below is used to identify the “Nominal Flange Size” (Pick one answer).
a) Throughbore I.D.
b) Flange O.D.
c) Diameter of raised face.
d) O.D. of ring groove.
e) Bolt circle diameter.
Answer: a
18) What is the main function of a diverter?
a) To shut in a shallow kick.
b) To direct fluid a safe distance away from the rig floor.
c) To create a back pressure sufficient to stop formation fluids entering the wellbore.
d) To act as a back up system if the annular preventer fails.
Answer: b
19) In an area where local legislation requires that BOP equipment must be rated so that maximum anticipated formation pressures do not exceed 75% of BOP equipment pressure ratings, what is the minimum acceptable rating for equipment to be used in drilling normally pressure formation to 16000 ft TVD?
a) 2000 psi BOP equipment
b) 3000 psi BOP equipment
c) 5000 psi BOP equipment
d) 10000 psi BOP equipment
e) 15000 psi BOP equipment
Answer: d
20) What is normally considered the highest potential risk when diverting a shallow gas blowout through a long marine riser?
a) The marine riser may collapse.
b) The marine riser may burst from the excess pressure exerted by the gas inside the riser.
c) Buoyancy forces acting on the marine riser may require riser tension forces in excess of
situation where the riser is full of drilling fluid.
Answer: a
References:
1.Transocean Sedco Forex – Jakarta Learning Centre – Pre-school exercises for Well Control With Answers.
2. Well Control Manual part.1 & 2 – from Well Control School