Petroleum Engineering 406 Offshore Drilling Special Problems Rigs

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Petroleum Engineering 406Offshore Drilling-
Special Problems- Rigs
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Drillship R.F. Bauer Global Marine WD 2000'
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NOTE API RP 2P has different force equations
Fig. 11 - Example Analysis Wind Areas
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Vessel
Hydrophone signal
Hydrophones
Beacon- signal transmission
Wellhead position
Ship position
Wellhead assembly
Position Indicating Display
Short base Line phase comparison system
Sea bottom
Acoustic Position Reference System. Source
Honeywell
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Tilt Indicator for Guide Structures
May be mounted on temporary guide base. View with
camera. Start hole within 1/2 deg. of vertical.
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Offshore Drilling Structures

• Offshore Drilling Structures
• Fixed
• Floating
• Tension Leg

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Can be up to 10 miles 20 miles 200 ft
Ice Floes in the Beaufort Sea
It is a good idea to get out of the way when one
of these babies comes along! Glory Hole may be
needed
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WL
ML
Spud Cans
Platform Piles
Typical Jack-up Platform layout
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Noble Drillings Cecil ForbesA Jack-Up Rig
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Shells CognacConventional20-well
PlatformWells are directionally drilled
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Shells BullwinkleWorlds tallest offshore
structure1,353 water depthProduction began
in 198945,000 b/d80MM scf/d
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Small concrete monotower concept
Concrete Monotower Concept Gravity Structure
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Several guy wires and clump weights support a
compliant platform.
Guy wires
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Main Deck
Column
A semisubmersible floats below the waterline when
drilling
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Sonats George Washington
A Semi-Submersible Rig
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Zapatas TraderA Drillship
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Joides Resolution Ocean Drilling Program
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Production Platform
Several tensioned tubes hold a tension-leg
platform on station.
Steel Tubes
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