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Petroleum Engineering 406

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SWAY: Translation port and starboard (Y-axis) ... Freeboard. Draft. Beam. 16. 17. G = center of gravity. B = center of buoyancy. G is above B! ... – PowerPoint PPT presentation

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Title: Petroleum Engineering 406


1
Petroleum Engineering 406
Lesson 9 Floating Drilling
2
Lesson 9 - Outline
  • Floating Drilling Vessels
  • Types of Motion
  • Types of Waves
  • When is Drilling Possible (WOW)
  • Vessel Capacities

3
Read
PETE 626 Lecture notes on web _at_
http//pumpjack.tamu.edu/juvkam-wold/
4
(No Transcript)
5
Drillship - moored
6
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7
Heave Surge Sway Roll Pitch Yaw
8
Motions restricted to the horizontal
plane SURGE Translation fore and aft
(X-axis) SWAY Translation port and starboard
(Y-axis) YAW Rotation about the Z-axis
(rotation about the moonpool) Motions that
operate in vertical planes HEAVE Translation up
and down (Z-axis) ROLL Rotation about the
X-axis Pitch Rotation about the Y-axis
Vessel Motions
9
Wave Direction
Beam Waves
Quartering Waves
10
Typical Vessel Motion Limits Criteria
Operation Wave Height Heave
ft
ft Drilling Ahead 30 10 Running and
Setting Casing 22 6 Landing BOP and
Riser 15 3 Transferring Equipment 15 -
11
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12
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13
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14
What is lt ?
15
Some Definitions
Freeboard Draft
Beam
16
(No Transcript)
17
G center of gravity. B center of buoyancy
G is above B!
18
NOTE B has moved!
q
GZ righting arm
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