Test 1

Question 1

Bottom supported can work in shallow water up to 33` - not used currently

Answer 1

Inland Barge

Question 2

Bottom supported. Most versatile bottom supported rig. Can work over a multi-well platform if rig is “cantilever” type which most are. Water Depth = 15’ - 550’ depending on make and model. Requires good weather to move, but insensitive to weather when jacked up.

Answer 2

Jack up

Question 3

Bottom supported. Can handle very high deck and derrick loads. Limited in water depth (15’ – 85’).

Answer 3

Submersible

Question 4

Floating. Less weather sensitive than a drill ship. Limited deck load capacity.Water depth range is 200’ – 12,000’.

Answer 4

Semi- submersible

Question 5

Floating and most mobile of all offshore rigs. Highest deckload capacity of floating rigs, but also most weather sensitive and has highest fuel consumption. Water depth = 200’ – 12,000’.

Answer 5

Drill Ship

Question 6

Requires a pre-installed platform. Bottom supported, or buoyant (TLP or Spar), least weather sensitive of all offshore rigs, except when rigging up or rigging down which is quite an endeavor. High rig up costs, but good for multi-well developments because they typically cost less than Jack-ups

Answer 6

Playform

Question 7

There are three fundamental functions that must be performed during drilling. List these below.

Answer 7

a) Break the rock
b) Remove the broken rock (cuttings) to clean the hole.
c) Maintain the wellbore stable (keep the hole open, prevent kicks or loss of return)

Question 8

6 major rig systems

Answer 8

a) Power
b) Hoisting
c) Circulating
d) Rotary
e) Well control
f) Well monitoring

Question 9

to conduct the drilling fluid from the ocean floor to the drilling vessel

Answer 9

marine riser or drilling riser

Question 10

both have the same function; allows lateral movement of the vessel.

Answer 10

ball joint / flex joint

Question 11

to keep the drilling riser under constant tension with the vertical
movement of the vessel (heave)

Answer 11

pneumatic tensioning device

Question 12

allows the vertical movement of the vessel

Answer 12

slip joint

Question 13

connected to the surface casing it allows hanging of all remaining casings in the well and has a connector profile for the connection of the BOP .

Answer 13

high pressure housing

Question 14

allows the deviation of fluid flow from the riser to overboard or to the mud gas separator.

Answer 14

diverter system

Question 15

Describe the function of a Pipe Ram valve in the BOP system?

Answer 15

Function: Close the annular space between against the drillpipe.

Question 16

Name the two general types (classes) of rig power systems

Answer 16

a) The diesel-electric type

b) The direct drive type

Question 17

Write a simple, but complete sentence explaining why calculating the displacement of drillpipe based only on the O.D. and I.D. underestimates the actual pipe displacement.

Answer 17

Because calculation based on OD and ID only neglects the tool joint dimensions and any existing internal or external upset of the connections.

Question 18

Name three components of the rotating system.

Answer 18

a) Kelly
b) Rotary table
c) Drill pipe and drill collars

Question 19

Name three components of the well monitoring system.

Answer 19

a) Weight indicator
b) Driller`s panel
c) Pit level indicator

Question 20

Name three components of the circulating system.

Answer 20

a) Mud pumps
b) Mud pits
c) Solids control equipment

Question 21

Name three components of the hoisting system.

Answer 21

a) Derrick
b) Block and tackle
c) Drawworks

Question 22

Write a simple, but complete sentence describing the function or purpose of having blind rams (not blind- shear) in a BOP stack.

Answer 22

Close the well when there is no string in the well

Question 23

Write a simple, but complete sentence describing the function or purpose of having variable bore pipe rams in a BOP stack.

Answer 23

To close the well, when more than one size of drillpipe is in the hole.

Question 24

What is the name of, which also describes, the procedure used on a rig to minimize the risk of a drilling line failure due to wear or fatigue?

Answer 24

Slip and cut operation