00. Basic Structure Training for Non-structure Background Staffs

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COPYRIGHT (C) KEPPEL FELSLTD

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Basic structure training course fornon-structure background staffs

in Mumbai Engineering Office

Date: 21 Feb 2006.

By: Paul Liang


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CONTENT

1. TYPES OF OFFSHORE STRUCTURE TYPES2. JACK UPS

3. SEMI- SUBMERSIBLES

4. BASIC SHIP STRUCTURE


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Types of OffshoreInstallations


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Submersibles

Semi submersibles

Drill ship Fixed Platforms

Jackups

FPSO, FSO, FPS

Others

Types of offshore installations


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KFELS TRACK RECORDTo date KFELS has built a whole range of offshore drilling rigs and support

platforms which includes :

34 Jack-ups

12 Semi-submersibles

5 Submersible drill barges

5 Drillships

3 Drilling Tenders

2 Tension Leg Platforms

3 FPSOs

3 Cable-laying Ships

5 Topside Decks

3 Power Plants


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Jack-ups


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Terms Used On Jack-Ups

Spudcan

Legwell

Leg Structure

Jackcase

Preload Tank Drill Water Tank

Ballast Tank

Pipe Rack

Cantilever

P Tank (Bulk Storage)

Drag Way

V Door Ramp (Pipe Ramp)

Choke & Kill Manifold

Mud Return Through

Derrick

Rotary Table

Cellar Deck

Skidding Deck

Drillfloor

Mud Pits Driller Office

Mouse Hole

Rat Hole

Setback

Bop Stack

Mud Ditch

Trip Tank Hillman Rollers

Draw Works

Mud Standpipe Manifold

Inner Bottom


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The main hull scantling drawings for a Jack-up

Bottom Shell Plan

Tank Top Plan

18-0 Level Plan Main Deck Plan

Transom Bulkhead Section

Transverse Frame Section

Transverse Bulkhead Section

Longitudinal Section

i) Side Shell Elevation

j) Leg Well Details

k) Leg Spud Can Structures

l) Leg Structures

m) Jack Case & Lower Guide

n) Jack Foundation Bracings

o) Location of Full Penetration

p) Deck House structures.


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Steel Outfitting for a Jack-up

a) Bottom Plugs Location

b) Sea-Chest Details

c) Anchor Rack Detailsd) Main Generator Foundation

e) Emergency Generator

Foundation

f) Skeg Details

g) Pumps Foundation

h) Fwd/Aft Towing Pad Details

i) Structural Doors Schedule

j) Grating Platforms

k) Hatchesl) Booby Hatches

m) Manholes & Vertical Ladders

n) Inclined Ladders

o) Loose Tanks


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Jack ups are used

for shallow water

drilling.

To withstandstrong wind and

wave pressure

Jack ups are

mostly in

triangular shape

There are 3 or

more vertical legs.


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These legs have teeth

that can be raised or

lowered by a jacking

mechanism on the deck

When arrival to next

location, the legs are

jacked down till theytouch the sea bed.


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@ Port Side View

Cantilever @ 20ft CL. Of Well Off Transom

Cantilever

Port Aft

Crane

DerrickLegs

Jack Up

Motor


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Life Boat

( 107Men )

Heli Deck

Quarters

Yard Temporary Access

@ Port Side View


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@ Front View

( 225ft x 208ft x 25ft )

Quarters

Life Boat

(107Men)

HeliDeck

DerrickLegs

(517ft)


Jack Up

Motor


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@ Top Of Cantilever, Elevation 44 - 9

1/2 ABL.

Crane

V-Door

Ramp

PipeRack

Deck

Dragway

Access To Pipe Rack Deck

Derrick


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@ Port Leg View

Jack

Unit

LegCrane

Pipe

Rack

Deck

Access To Pipe Rack Deck


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@ Port Leg View, Main Deck, Elevation 25 - 6

1/4 ABL..

Jack

Up

Leg

Jack

Up

Motors

Main

Deck

Crane

Access To Pipe Rack Deck Radiator Platform


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@ Main Deck, Elevation 25 - 6 1/4 ABL.

Quarters

Cement

P-Tanks

Main

Deck

Crane

Jack

Up

Leg

Jack Up

Motors


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Jack Up

Leg

Jack Up

Motor

Quarters

CementP-Tank

Main

Deck

Crane


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@ Port Side - Aft View

Crane

Heli-Deck

Quarters

Access ToMain Deck

Jack Up

Motors

Jack Up

Legs

Derrick


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@ Front View

( 225ft x 208ft x 25ft )

Jack

Up

Legs

Derrick

Life

Boat

Quarters

Heli-

Deck


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@ Front View

( 225ft x 208ft x 25ft )

Jack

Up

Legs

Life Boats

( 107Men )

Heli-

Deck

Life

Boats

( 65Men )

Life Boat

Davit


Jack

Up

Motors


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@ Port Side View

Cantilever @ 20ft CL. Of Well Off

Transom

Cantilever

Derrick

Legs

Crane

Heli

DeckCable

Festoon


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@ Port Side ViewCantilever @ 20ft CL. Of Well Off Transom

Derrick

Cantilever

Cable

Festoon


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Semi-submersible


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Semi-Submersible

Most useful of all other drilling platforms.

Towed to the location and ballasted down so

that it sits on the bottom.

Larger type of drilling platformHouse of vessel were ballasted and allowed

to submerged and rest on the water

Drilling and accommodation deck remainsclear of water on tall pillars


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Terms Used On Semi-Submersibles

Pontoons (lower Hull)

Columns

Bracings

Fenders

Blisters

Mooring Padeyes Upper Hull

Moonpool

K-Bracing

Ram Rig Substructure

Riser Pipe Stack

Forward Pipe Stack

Crane Boom Rest

Sand Trap

Degasser tank

Desilter Tank Clean Tank

Hazardous Drain Tank

Gumbo Box

Catwalk

Drain Gutter

Laydown Area Helideck

Fingerboard

Mud Logging Unit

Shale Shaker House

Ram Hoisting SWBD Room

HPU House

Navigating Mast Wind Sock

Surge Tank

Remote Operator Vehicle


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Main Hull scantlings for a Semi-Submersibles

Pontoon Bottom Shell Plan

Pontoon Side Shell Plan

Pontoon Deck Plan

Pontoon Centerline Section

Column Shell Elevation

Column Centerline Section

Column TransverseSection

Longitudinal Section

Transverse Bracings

j) Diagonal Bracings

k) Fenders Structures

l) Blister Structures

m) Upper Hull Lower DeckPlan

n) Upper Hull Main Deck Plan

o) Upper Hull LongitudinalPlan

p) Upper Hull Transverse Plan

q) Deckhouse Structures


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Steel Outfitting for a Semi-Submersibles

a) Pontoon Bottom Plugs

b) Pontoon Sea-Chest Details

c) Pontoon Anchor RackDetails

d) Pontoon ThrusterFoundation

e) Pontoon Motor Foundation

f) Pontoon Pumps Foundation

g) Pontoon Towing Pads / Chks

h) Pontoon Hand RailingDetails

i) Watertight Doors Schedule

j) Grating Platforms

k) Hatches

l) Booby Hatchesm) Manholes & Vertical

Ladders

n) Inclined Ladders

o) Loose Tanks


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Can operate in

deep or slightly

shallow water.

Working deck with

vertical columns

fitted beneath the

deck.


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Some of the tanks

ballasted to submerge

the vessel to maximise

stability and minimise

movement.


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Basic Ship Structure

Bulkhead-Transverse

-Longitudinal

Corrugated Bulkhead

Transverse FloorLongitudinal Floor


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Longitudinal Bulkhead

Transverse Bulkhead


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Transverse floor

Longitudinalfloor

Tank Top


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Main Functions Divide the main hull into different

compartments

In the event of a damage to the shell platingbulkheads limit the extend of flooding andhence of loss of buoyancy.

Transverse bulkhead prevents racking andtorsional distortion.

Longitudinal bulkheads contribute to thelongitudinal strength.


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Corrugated Bulkhead Corrugations are formed on a corrugated bulkhead to

eliminate the need to fit the vertical stiffeners

It is stronger than a flat plate

Elimination of vertical stiffeners results in saving in steel

weight and cost of stiffeners.

Steel plates are arranged in a vertical direction increasingslight increase in plate steel weight

The angle of corrugation is normally about 45 degrees

Diaphragm plates or horizontal stringers are fitted on thebulkhead to keep the corrugation in place.


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Corrugated bulkheadsunder construction


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New plates in storage


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How are plates cut?

Plates are cut by cutting torch, whichproduces a flame with a stream of oxygento burn off steel material at the line of cut.

Hand or machine cutting can beperformed.

Other methods are plasma cutting,waterjet cutting, etc.


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Double


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Double

Bottom

Blocksunder

construction

Typical Panel Marking


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Typical Panel Marking

Project Number Panel Number

Blk No.

MSS Number

Plate Number

00. Basic Structure Training for Non-structure Background Staffs

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