Single Point Mooring Systems

24 Feb 2012By. MA

Content

1. SPM Technical Description

2. Lesson Learnt

Single Point Mooring (SPM )is used for loading\unloading of tankers, providing a weathervane mooring in open sea conditions

SPM Definition

SPM

Loading

Mooring

250 m

Shore Terminal

JettyTanker

Pipeline

SPM

Why SPM?

SPM Components

Pipeline

PLEM(Pipeline End Manifold)

Under Buoy Hoses

Buoy

Floating Hoses

TankerMooring Hawser

Mooring Chains

Catenary Anchor Leg

Mooring (CALM) Buoy

Buoy ComponentsCentral Pipe

Unit

Valves

Buoy Piping

Platform

Hose

Central Piping Unit (CPU)

Under Buoy Hose

Connection

Above Water Components-1

Floating Hoses

Mooring Hawsers

Rotation vs Fixed Parts

Fixed

Rotating

Turntable Buoy: buoy with a geostatic fixed buoy body (moored to the seabed) and a rotating mooring table (Conventional Design)

Turret Buoy: buoy with a geostatic turret and a buoy body, which is rotating around the turret.

CALM Buoy Types

Bearings

Main Bearing

Fixed

Rotating

Swivel Bearing

Central Piping Unit

(CPU)Electrical

Swivel

Turret Buoy-Rectangular

Fixed

Rotating

Surge Tank

Central Piping Unit

Turntable Buoy

Hose Connection

6m

12m

Turret Buoy

Moored Tanker

Mooring Hawser

Mooring Hawser

Floating Hose and Under Buoy Hose

Floating Hose Strings

Under Buoy Strings

Oil Companies International Marine Forum (OCIMF)

Floating Hose Strings (Example)

MBC

Floating Hose and Marine Break-away Coupling (MBC)

MBC

Tanker Manifold Connection

Under Buoy Hose Strings (Example)

Water Depth

15m

32m

Floats

Buoy

PLEM (Pipeline End Manifold)

PLEM (Pipeline End Manifold)PLEM Barrel

Valve (Under Buoy Hose)

Plan View

PLEM – Elevation View

Elevation View

Piled Foundation

Hydraulically Operated valve

Hose Connection

PLEM Valves

PLEM

Buoy Anchoring Assembly

Anchor Chains

Seabed Anchor

High Holding Power (Fluke Anchor)

SPM Project Requirements

• Certification and Design Codes• Navigation Depth and Dredging• Survey (Bathymetirc, Geotechnic, Metocean, UXO)• Pipeline Connection • Flow Assurance• Control \SCADA• Operation\Support Vessels\Spill Clean-up

Certification and Design Codes

• Det Norske Veritas (DNV)• Bureau Veritas (BV)• American Bureau of Shipping (ABS)• Lloyds Register of Shipping.

Navigation Depth and Dredging

Survey (Bathymetirc, Geotechnic, Metocean, UXO)

PLEM-Pipeline Spoolpiece

Flow Assurance