An Assessment of Techniques for Removing Offshore Structures (1996)

 1-1

Number of Existing Platforms, Including Caissons, by Age,

6

 1-2

Number of Existing Platforms, Including Caissons, by Water Depth,

6

 1-3

Distribution of Existing Platforms in the Gulf of Mexico,

7

 1-4

Examples of Caissons with Wells,

8

 1-5

Well-Protector Platform,

9

 1-6

Braced Caisson with Conventional Piles (MOSS I),

10

 1-7

Braced Caisson with Skirt Piles (Seahorse),

11

 1-8

Conventional 4-Pile Platform with Wells,

12

 1-9

Conventional 6-Pile Quarters Platform,

13

 1-10

Examples of Skirt-Piled Platforms,

14

 1-11

Mud-Slide-Type Platform,

15

 2-1

Shock-Wave Focusing,

18

 2-2

Radial Hollow Charge,

19

 2-3

Sketch of a Mechanical Cutter on a Pile,

21

 2-4

Sketch of a Sand Cutter on a Pile,

21

 2-5

Sketches of an Abrasive Jet Cutter on a Well and Pile,

22

 2-6

Excavation Required for External Diver Cuts,

24

 2-7

Sketches Showing Internal Diver Cut,

25

 2-8

Hydraulic Shears,

26

 2-9

Diamond Wire Cutter,

26

 2-10

Pyrotechnic Torch,

27

 3-1

Number of Platform Removals, Excluding Caissons, by Method and Water Depth (1985–1994),

31

 3-2

Number of Platform Removals, Including Caissons, by Method of Removal by Year (1/1/85–11/21/94),

32

 3-3

Number of Platform Removals, Including Caissons, Gulf of Mexico (1/1/53 –11/21/94),

32

 3-4

Number of Platforms by Soil Type,

36

 3-5

Number of Platforms by Soil Type and Water Depth,

37

 4-1

Number of Fish at Platform WC 352,

46