Craft & Hawkins Petroleum Engineering Department
Louisiana State University
For Questions 1 to 10: Mark A for True or B for False, for the following
... [Show More] statements:
(15 points - 1.5 each)
Question A(True) B(False)
1 The use of Trip Tanks (usually small in size) allows better detection of
changes in fluid volume in the well, which is very important when monitoring
hole fill-up during tripping operations.
X
2 The well control system allows you: to close the well at surface, to move the
drill string under existing pressure in the well and to divert flow away from
rig personnel and equipment.
X
3 If we are tripping out of the hole and the actual mud volume needed to fill up
the hole is greater than calculated, this is a positive indicator of a kick in
progress.
X
4 Diverter is the equipment that serves as a seal between the well and the rig
floor, diverting the annular flow coming from the riser. X
5 The arrangement of the BOP stack varies considerably. It depends on the
magnitude of formation pressure in the area and on the type of well control
procedures used by the operator.
X
6 A mud gas separator permits any produced formation gas to be vented.
X
7 The components of a typical blowout preventer stack are: annular preventer,
at least one pipe ram, blind ram or blind shear ram and the Rotating Control
Device – RCD.
X
8 MWD specifically refers to measurements taken downhole in real time using
devices located on BHA (Bottom Hole Assembly). This technique is typically
used for higher cost directional wells.
X
9 Motion Compensating System is used to avoid that horizontal movement of
an offshore floating rigs gets transferred to the drill string, allowing the
application of constant weight on bit.
X
10 When the drawworks drum is almost empty of drilling line, the torque
developed at the drawworks can be up to 20% greater than when it is
completely full of drilling line.
X
For questions 11 to 18: Mark the correct answer.
11- The mechanism principle shown in the figure below refers to which system found on a
floating offshore drilling unit? (6 points)
A- Coiled Tubing System
B- BOP System
C- Circulating System
D- Riser Tensioning System
E- Rig Inertial Navigation System
12- What types of vessel motion can be compensated for using flex joint and telescopic joint,
respectively? (6 points)
A- Rotational / Vertical
B- Horizontal / Rotational
C- Horizontal / Vertical
D- Vertical / Horizontal
E- Only Vertical motion
13- In an offshore drilling operation (Water Depth = 5,000 ft), you have just finished jetting the
30-in. conductor casing in place at 200 ft below mudline (sea bottom). The next section to be
drilled is the 26-in. hole, down to 3,500 ft below sea bottom, to set the surface casing. Please
number the sequence of operations to be done next in the right order, from 1 to 5. (6 points)
( )Run the 20” surface casing
( )Move, deploy and latch the BOP on the high pressure housing
( )Disconnect and pull out the jet running tool to the surface
( )Drill the 26” hole to 8,500’ MD/TVD
( )Cement the 20” casing all the way to sea bottom
A- [ 3 – 4 – 1 – 2 – 5 ]
B- [ 3 – 5 – 1 – 2 – 4 ] – This could also be true, in case of failure in the jetting tool
C- [ 2 – 5 – 3 – 2 – 1 ]
D- [ 3 – 5 – 2 – 1 - 4 ] – This is the expected answer
E- [ 4 – 1 – 2 – 5 - 3 ]
14- The Emergency Disconnection System – EDS actuates on the connector which is installed
between the: (6 points)
A- BOP stack and the well head
B- High pressure housing and the BOP
C- Drilling Riser and the LMRP
D- LMRP and BOP stack
E- Slip Joint (Telescopic joint) and the Terminator joint [Show Less]