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Rapid development of marginal oil & gas fields with low cost offshore pipelay

Event organised by Offshore Engineering Society

01 February 2023

This event has now ended

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Welding is the predominant method for fabricating steel pipe systems across the subsea industry either from Reeled pipelay vessels or S-lay barges. But there are several applications where traditional welded pipelay methods become uneconomic or technically challenging.

Reeled pipelay becomes difficult or impossible in very shallow water and requires a nearby spool base. There is limited availability of S-lay vessels in some regions, including the UKCS. The short project schedules required to address current energy shortages demand ready access to cost-effective pipelay assets, which can be challenging as market conditions tighten.

The Cortez Subsea, Modular Pipelay System (MPS®) in conjunction with the NOV-Tuboscope Zap-Lok™ connector, allows rigid steel pipelay using standard API-5L carbon steel line pipe (2-16 inch diameter), to be performed from widely available vessels.

This talk will provide an overview of the Zap-Lok™ connector system, showing how it has been qualified and applied to onshore and offshore pipeline projects in the past. The modular pipelay system will be described, and case studies presented. Line pipe material requirements, applicable water depth ranges, typical lay rates, and implications for the project schedule will be presented. Considerations for pipeline design, certification, regulatory approval and overall project execution strategies will be discussed.


18:00 - 19:00

Talk from Charlie Hughes and Edward Currey

19:00 - 19:30



Charlie Hughes

Charlie Hughes

Cortez Subsea

pipelay services manager

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Charlie Hughes

Charlie is the Pipelay Services Manager with Cortez Subsea (part of the MCS Group). Since he joined Cortez in 2013, Charlie’s primary focus has been in championing subsea pipelay using the NOV Tuboscope Zap-Lok™ mechanical interference fit connection (MIFC), in conjunction with the company’s own patented, Modular Pipelay System (MPS®) for offshore pipelay. Recently Charlie formed part of the team that layed the first MIFC connected pipeline offshore Malaysia, using NOV Zap-Lok™ on 60km 12-inch Gas Condensate pipeline (X52 17.5mm WT) in 70 metres water depth, with lay rates in excess of 4km per day.

Edward Currey

Edward Currey

NOV Zap-Lok

product line manager

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Edward Currey

Edward is the Product Line Manager with NOV Tuboscope Zap-Lok™. During his 11 years with NOV Edward has been responsible for overseeing sales and implementation strategies to deliver the Zap-Lok™ technology on numerous projects in Europe, Africa, Middle East & Far East. Edward also manages the interface between NOV and Cortez Subsea for offshore Zap-Lok™ applications.

Event flyer

For more information please contact:

Fiona Oteng