Pre-Commissioning / Decommissioning of Pipelines

Thirran Energy Project Management and Engineering Consultancy for Pre-commissioning and Decommissioning activities

At Thirran Energy, our Integrity Assurance team has almost thirty five years of combined experience in providing consultancy and guidelines on how best to accomplish the pre-commissioning or decommissioning work effectively.

The company is led by a team of industry experts with combined expertise in pre-commissioning, pipeline inspection, maintenance services and pipeline decommissioning sectors; providing customized solutions to challenging problems even in the most hostile environments.

Thirran Energy is focused on delivering value added services safely and cost effectively by providing state-of-the-art technology, reliable and high quality equipment to the needs of our customers.

Pipeline Pre-commissioning

Thirran Energy providing a full range of pipeline pre-commissioning services to both onshore and offshore industries. The services offered by Thirran Energy are aimed at providing operators the ability to initiate, sustain and increase production. This can be achieved through a variety of methods of activities including improving efficiency of planned projects and by increasing the production and transportation capability of in-field hydrocarbon flow lines, process plant and export pipelines.

Pre-commissioning of a pipeline system refers to activities generally considered to include the preparation and integrity verification of pipeline structure upon completion of construction/installation and prior to commissioning. Pre-commissioning activity requires preparation of pipeline for filling with the final product. The activity normally commences with the pipeline flooding, cleaning, gauging and hydrostatic test to validate leaks and internal geometry conditions. Then the final stage ends with dewatering, drying and purging (inert Nitrogen blanket) prior to fit for introduction of product. Often client validates the integrity of the pipeline including welding joints through baseline inspection using Caliper and MFL.

Pipeline Decommissioning

Pipeline Pre-commissioning / Decommissioning is part of the life cycle of any onshore / offshore pipeline installation. Pipeline Pre-commissioning / Decommissioning is a complex multi-discipline process with an overall timescale, normally lasting several years, requiring the management of diverse departments and agencies, oil producing companies, third party contractors, local communities, and non-government organizations.

Decommissioning of a pipeline system refers to activities of multi-step processes that typically includes disconnecting the line from supply, removing the product, cleaning, inerting and then pipeline abandonment or environmental re-instatement. Thirran Energy can provide guidelines to clients / operators on the whole decommissioning process and recommend solutions for many of these key steps, from de-waxing, de-oiling of liquids and clean the pipeline, to line plugging or cementing services that facilitate line abandonment.

The very purpose of decommissioning the pipeline, is to eliminate product adherent to the pipeline internal wall such as waxes, sludge, ferrous particles, etc. before its decommissioned according with the national standards for the Oil & Gas industry. After decommissioning the pipeline, clients / operators must ensure that the retired line is safe and in full compliance with regulatory and industry requirements.

Through collaboration partnership with our key Principal, Thirran Energy offers the following services;

Procedure Writing, Planning and Method Statement

Pipeline Pre-commissioning Engineering
Pipeline Pre-commissioning Procedures
Pipeline Pre-commissioning Plan
Pipeline Pre-commissioning Planning & Scheduling Procedures
Pipeline Pre-commissioning Project Execution Guidelines
Pipeline Pre-commissioning Hydrotest Procedures

Pipeline Pre-commissioning Pig Launching And Receiving Procedures
Pipeline Pre-commissioning Trouble Shooting Pipeline Pigging Operations
Pipeline Pre-commissioning Dewatering Procedures
Pipeline Pre-commissioning Stuck Pig Removal Procedures
Pipeline Pre-commissioning Flushing Procedure

Onsite Activities

Pipeline Pre-commissioning Line Flooding
Pipeline Pre-commissioning Cleaning (pigging)
Pipeline Pre-commissioning Pipeline Gauging
Pipeline Pre-commissioning Advanced Pipeline Gauging (using SmartFoam)
Pipeline Pre-commissioning Hydrostatic Testing & Leak Detection
Pipeline Pre-commissioning Pneumatic Testing
Pipeline Pre-commissioning Leak Testing
Pipeline Pre-commissioning Dewatering / Swabbing
Pipeline Pre-commissioning Air Drying (Air Blowing)
Pipeline Pre-commissioning Vacuum Drying
Pipeline Pre-commissioning Purging using 'inert' Nitrogen
Pipeline Pre-commissioning Nitrogen blanket packing (Line Preservation)

Pipeline Precommissioning Baseline Inspection (Caliper and MFL)
Pipeline Decommissioning De-oiling / De-waxing / paraffin removal / asphaltene removal / black powder removal
Pipeline Decommissioning Mercury Decontamination
Pipeline Decommissioning Pipeline De-rusting
Pipeline Decommissioning Pipeline Batching (Chemical Inhibitor)
Pipeline Decommissioning Line Proving for Debris Deposit Mapping
Pipeline Decommissioning Pipeline Abandonment Process and Methodologies
Pipeline Decommissioning Diamond Wire Saw Cutting
Pipeline Decommissioning Pipeline Plugging or Cementing
Artificial Reef Construction & Installation (enhances fishing habitat)
Pipeline Decommissioning Trenching
Pipeline Decommissioning Re-bury or Cover with Gravel