Subsea Pipeline Installation (S-Lay) & Beach Pull (Shore Approach)

Good video to start with.

This is a generic Content for Fixed Offshore Pipelay Installation Procedure. As a field engineer, developing of this kind of procedure is part of my daily job in the office. I hope this section will help you to get the picture how the subsea pipeline were installed. I’ll try to write in a very simple way just to ensure any layman will get the brief view on how the pipeline installed offshore. I’m not going to write the actual procedure! Just in form of narrative.

Introduction
Description of Pipeline
Scope/Sequence of Work
Installation Summary
Reference Documents
Contractor Documents
Client Approved Drawing For Construction
Pipeline Schematic Diagram
Overall Field Layout

LOAD-OUT AND TRANSPORTATION

Pre-Loadout
Loadout and Transportation
Figures
Loadout No. 1 (Voyage No. 1) on 280 Ft Class Barge (Example Sealink Pacific 287)

3.0 BEACH PULL PROCEDURE

Survey and Positioning
Barge Set-up and Anchor Moves
Preparation For Pipe Pull
Transfer of Pull Cable from the Beach
Beach Pull Buoyancy and Strip-out Cable Installation
Beach Pull Commencement
Beach Pull Activities
Stripping Out Buoyancy Tanks
Beach Pull Completion Activities
Pipeline Beach Pull General Arrangement
Beach Pull Anchor Pattern
Beach Pull Start-up Head at
Buoyancy Tank Detail For Beach Pull Activity
Derrick Crane Strip-out of Buoyancy Tank

START-UP PROCEDURE ( DEADMAN ANCHOR/BOWSTRING)

Equipment List and Preparations
Equipment List for Start-up at Onshore Terminal
Preparations for Start-up at Onshore Terminal
Detailed Procedure
Detailed Procedure for Start-up
Extracts from Field Data Book
Barge Setup for Start-up of 20” dia.
Deadman Start-up Head
Deadman Anchor Start-up Rigging Arrangement at Onshore Terminal
DMA Deployment Sequence
Barge Set-up in Relation to Pulling Head Location

PIPELAYING PROCEDURE

Equipment List and Preparations
Material and Equipment List For Pipelaying
Preparations for Pipelaying
Detailed Procedure
Barge Ramp and Stinger Details
Pipelay Barge Arrangement
Barge and Anchor Set-up
Pipelay Variables
Survey and Positioning
Linepipe Handling
Linepipe Preparation
Welding/NDT/Weld Repair
Welding
NDT
Weld Repair
Buckle Detection
Field Joint Coating
Serviwrap Application
Mastic Addition
Extracts from Field Data Book
Barge Roller Height and Longitudinal Distance
Alpha Pontoon Stinger Roller Heights & Distance Setting
Alpha Pontoon Stinger Roller Heights & Distance Setting
Pipe Ramp Arrangement Pipelay Barge
Pipelay Barge4 (Example) Aft, Mid and Fwd Draft
Pipelay Barge (Example) Plan and Profile.
Sling Arrangement for Linepipe Handling
Pipe Tally Sheet Pro forma
Buckle Detector And Stop Trolley Assembly
Internal Line-up Clamp and NDT Crawler Set-up
Internal Line-up Clamp and NDT Crawler Stop Trolley Operation
Stop Trolley / Buckle Detector Cable Make-upApplication of M30B Serviwrap
Application of Marine Mastic

PIPELINE LAYDOWN/ABANDONMENT & RECOVERY

Equipment List and Preparations
Laydown Procedure
Abandonment Procedure
Recovery
Extract from Field Data Book
Laydown Head
Emergency Laydown Head
Choker Slings Arrangement
Barge Anchor Pattern Laydown Approach at Platform
Pipeline Abandonment and Recovery Step by Step

Pipeline Buckle
Preparations and Equipment List
Minor Dry Buckle
Severe Dry Buckle
Wet Buckle

START-UP/LAYDOWN HEAD PADEYE CALCULATION
BEACH PULL CALCULATION

OffshoreMan
Offshore Platform InstallationOffshore Engineers Trainning Plan
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