World Geography Oil Rig Worksheet
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1
2World Geography Oil Rig Worksheet
Name:
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Refer to text pages listed below and the CAPP booklet – Offshore Drilling Rigs (ODR)
o Note: refer to depth on CAPP booklet not text if different # given
Type of
Sketch
Factors which
Anchoring/Stabilizing Structure
Rig
determine using this rig
over the others
Shallow water, near
Platform rests on columns attached to
Submersible
(test p185)
shore
pontoons (floats)
20m
depth water max
Ballast
tanks are flooded until
platform rests on its legs on the ocean
floor
Shallow water near shore
3-4
Jack-up
retractable
legs
Legs are lowered on to the sea floor
(ODR)
10-100m
depth
The platform is
jacked
up to the
desired height above waves
Deeper water, rough seas
Valves and pumps add or remove
Semi-
Submersible
70-1000m
(1800m max)
water in the
ballast
tanks in the
Anchored
pontoons to raise or lower rig to
(ODR)
stabilize
it
Anchors
maintain location and
winches
keep tension
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