Rigid Pipelay And Subsea Works

BOP SPM Overhaul - Early Works (Disconnection of Buoy 17471)

PROJECT TITLE

BOP SPM Overhaul – Early Works (BOP SPM Buoy Refurbishment & Offshore Installation)

 

CLIENT

Mobil Producing Nigeria Unlimited

SCOPE / DESCRIPTION OF THE PROJECT

The project Involved the disconnection of Buoy 17471 from BRT, Recovery of Mooring chains, anchors and Retro pods anodes. The buoy was towed to CONTRACTOR yard, lifted, dismantled and detailed inspection was carried out in conjunction with OEM for the buoy refurbishment.
Detailed scope of work including engineering deliverables / procedures was developed for the overhauling phase.

YEAR OF EXECUTION

2023 – 2024

BOP SPM 3 Replacement Project

PROJECT TITLE

BOP SPM 3 Replacement Project

CLIENT

Mobil Producing Nigeria Unlimited

SCOPE / DESCRIPTION OF THE PROJECT

The BOP SPM 3 Replacement Project included the disconnection of SPM 17471 and its towing to BRT for storage, along with the disconnection of SPM 1448 and its installation at the SPM1 location. The scope also involved the partial replacement of mooring chains at the SPM3 location, the installation and pre-commissioning of a new stock buoy with all associated accessories at the SPM3 location—including floating and subsea hoses, and mooring hawser—and the final commissioning of the system.

YEAR OF EXECUTION

2020 – 2021

20” X 23km Offshore Pipeline Scope and Loading System Installation

PROJECT TITLE

PCIC for 20” X 23km Offshore Pipeline Scope and Loading System Installation

CLIENT

Atlantic Terminal Infrastructure Limited (ATIL)

SCOPE / DESCRIPTION OF THE PROJECT

The project involved the installation of a 20” x 23 km crude oil offshore pipeline and an SPM/PLEM loading system. It encompassed the procurement, construction, and installation of the pipeline system, along with ancillary equipment such as pig traps, running from the onshore terminal to the offshore loading facility. The WAV team installed the SPM/PLEM system and worked on the integration of its instrumentation and controls with the onshore terminal control system. Following installation, pre-commissioning, mechanical completion, and commissioning activities were carried out to ensure the system was fully operational.

YEAR OF EXECUTION

2022 – 2025

12-inch ADNB – ADNA Pipeline Design and Construction Project, ADDAX – FODE / Nigeria – Pipelay

PROJECT TITLE

12-inch ADNB – ADNA Pipeline Design and Construction Project

CLIENT

ADDAX Petroleum Development Nigeria Limited / Field Offshore Design Engineering (FODE)

SCOPE / DESCRIPTION OF THE PROJECT

The project encompassed mobilization and demobilization of equipment and labor, along with competent project management and installation engineering personnel. It involved the procurement of materials for the 12.750” x 3.267 km pipeline from ADNB to ADNA (concrete weight-coated pipeline). Pre- and post-lay surveys were conducted, followed by the fabrication, installation, and pre-commissioning activities (flush, gauge, clean, and hydrotest). The final deliverable included the completion of an as-built dossier.

YEAR OF EXECUTION

2020

Tubu Field Development Project, AMNI International Petroleum Development OML 52 Company Limited / Nigeria – Pipeline & Umbilical Transportation & Installation

PROJECT TITLE

TUBU Field (OML 52) Development – Pipeline & Umbilical Transportation & Installation

CLIENT

AMNI International Petroleum Development OML 52 Company Limited

SCOPE / DESCRIPTION OF THE PROJECT

The project involved transporting and installing two pipelines and an umbilical between the IMA Platform and Tubu WHP. This included 10 km of electrical power, chemical distribution, and fiber optic umbilical. The installation also featured approximately 10 km of 4” and 12” welded pipelines connected to flanged risers. The final phase included riser pull-ins, pipeline pre-commissioning, umbilical testing, and post-lay burial to a depth of 1 meter below the seabed.

YEAR OF EXECUTION

2019-2020

Sonam Field Development Project – Pipelay and offshore installation

PROJECT TITLE

Sonam Field Development Project

CLIENT

Chevron Nigeria Ltd

SCOPE / DESCRIPTION OF THE PROJECT

The Sonam Field Development Project is located in shelf concession OML 91, Escravos Area, offshore Nigeria, in water depths ranging from 7 metres around Okan to 66 metres at Sonam. The offshore work commenced in January 2016.

The scope of work is the installation of a 32 km 20-inch pipeline between the Sonam and Okan fields as well as a Pig Receiver Platform including jacket and bridge at the Okan end of the pipeline. As-Built Surveys were completed which included: GVI, Stills and video, CP, damage survey, scour survey, orientation survey, torque checks on connections, leak survey

The offshore installation work was performed by Jascon 30 and Jascon 25, supported by a number of WAV’s marine support vessels and barges.

YEAR OF EXECUTION

2015 – 2016

Erha North ph 2, Exxon Mobil / Nigeria – Subsea Installation

PROJECT TITLE

Erha North Phase 2

CLIENT

Esso Exploration and Production Nigeria Limited (Exxon Mobil)

SCOPE / DESCRIPTION OF THE PROJECT

Jascon 31, with its 400 t Deepwater crane, was nominated for the Deepwater (1200 m) installation works.

The Scope of work included:

  • Engineering & Design
  • Transportation and Installation of WI Manifolds (3) + Associated Piles
  • Transportation and Installation of Gas Lift Module (1) + Associated Piles for developments in OML-133 Erha North phase 2.

YEAR OF EXECUTION

2014 – 2015

Okpoho – Okono, NPDC / Nigeria – Pipelay

PROJECT TITLE

Okpoho – Okono, NPDC / Nigeria – Pipelay 

CLIENT

Nigerian Petroleum Development Project (NPDC)

SCOPE / DESCRIPTION OF THE PROJECT

The Nigerian Petroleum Development Company Limited (NPDC), a subsidiary of Nigerian National Petroleum Corporation (NNPC), awarded the contract to West African Ventures (WAV) to install and commission a new 16” x 13.5 km pipeline.

Scope of work summary:

  • Provision, mobilization, maintenance, operation and demobilization of all facilities and services;
  • Performance of all the necessary site investigation, pre-lay survey of the existing 16” pipeline route corridor and the selection of a new pipeline route for the new replacement pipeline;
  • Pipeline installation engineering and analysis;
  • Provision of all personnel required for the fabrication, coating, installation, construction, pre-commissioning, commissioning, support services and supervision of the works;

YEAR OF EXECUTION

2012 – 2013

EGP3A – ph 2, Chevron / Nigeria – Pipelay and Construction

PROJECT TITLE

EGP3A – ph 2

CLIENT

Chevron Nigeria Ltd

SCOPE / DESCRIPTION OF THE PROJECT

  • Procurement and coating of new 24” pipes
  • Installation of 24” x 27.4 km export pipeline including pipeline crossings;
  • Post lay trenching of 7 km of the import pipeline;
  • Post lay trenching of 7 km of the export pipeline;
  • Pre-commissioning/ Hydrotest/ intelligent pigging of the entire export line;
  • Complete refurbishment and installation of a PLEM and CALM buoy system, including mooring chains, subsea hoses, floating hose and mooring hawser. As-Built Subsea Inspection of installed components
  • Leak Test of the complete export pipeline system.
  • General Visual inspection
  • Subsea manifold inspection for leaks, CP readings, scour, damage, video, stills

YEAR OF EXECUTION

2012 – 2014

TIP Project, Chevron / Nigeria – Pipelay, Lifting and Subsea Works

PROJECT TITLE

TIP Project – Pipelay, Lifting and Subsea Works

CLIENT

Chevron Nigeria Ltd

SCOPE / DESCRIPTION OF THE PROJECT

The project was a 2-year Call-out Contract for the Transportation and Installation of Rigid Pipeline, Risers and Offshore Structures (TIP). It entailed Project Management, Engineering, Procurement, Transportation, Fabrication, Offshore Installation, Pre-commissioning and Touch-up Painting (where applicable) for the following:

 

  • 5 pipelines with a nominal diameter of 6” in water depths of 5.5 to 6.0 m
  • 10 nos platform stalk-on risers of various lengths
  • Offshore survey activities and post installation Subsea GVI surveys

 

WAV outfitted the Jascon 2 accommodation barge with a 300-t main crane and pipelay equipment. The conversion was engineered in-house and executed at the company’s fabrication yard in Onne, Nigeria.

 

YEAR OF EXECUTION

2009 – 2012

EGP3A Phase – 1, Chevron / Nigeria – Pipelay and Subsea Works

PROJECT TITLE

EGP3A Phase – 1

CLIENT

Chevron Nigeria Ltd

SCOPE / DESCRIPTION OF THE PROJECT

The project was for the Installation of a 24-inch pipeline which formed part of the wider Escravos Gas Project Phase 3A (EGP3A) Project. The contract was awarded to West African Ventures, Limited and entailed

  • Installation of a 24” x 18.2 km import pipeline including pipeline crossings
  • Installation of a 24” riser at Okan NWP platform
  • Installation of subsea expansion spool
  • Installation of piggable wye connection, 24” to 20”
  • Beach pull of 2 pipelines 24” diameter
  • Cofferdam installation and removal
  • Midline tie-in 24” pipeline
  • Pre-commissioning including hydrotest of 24” import pipeline
  • Subsea connection inspection
  • Subsea Pipeline inspection

YEAR OF EXECUTION

2009 – 2010

West African Ventures (WAV), is a 100% Nigerian owned company and a leading indigenous provider of comprehensive onshore and offshore services.

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