UK: Ecosse Subsea Completes Seabed Clearance Project on Laggan-Tormore Fields

Ecosse Subsea Systems has completed a major seabed clearance project on the Laggan-Tormore project west of Shetland on behalf of TOTAL E&P Ltd and its partner DONG E&P (UK) Ltd.

The Aberdeen subsea technology company deployed its SCAR1 trenching tool to remove up to 1000 boulders which were delaying progress on cable laying and umbilical installation work.

The SCAR1 cut a 10 metre wide swathe over a 67km route, displacing boulders up to two metres in diameter and removing soil to leave a flat seabed for pipe laying to commence.

Typically seabed clearance is done using a ‘boulder grab’ device and is a slow process as it displaces rocks one by one, with operators reluctant to tackle boulders larger than a half metre in size.

The SCAR system was originally developed as a subsea plough but was redesigned and fabricated to suit TOTAL’s requirements and mobilised within a ten day window. The clearing plough worked at depths of 640 metres, believed to be a record for this type of equipment, and at optimum performance was clearing up to 1000 metres of seabed per hour.

Ecosse Subsea Systems managing director, Mike Wilson, said he hoped the success of the project has created a fresh solution for other exploration companies faced with complex seabed clearance issues.

He said: “Boulder clearance during seabed preparation is a real problem for some operators and is so arduous and expensive that often they opt to move the route of the pipeline. Our method, including preparation, vessel charter and deployment is considerably less expensive than the traditional alternative methods.

“Our SCAR system is extremely robust, easily mobilised, can work in the harshest environments and in up to depths of 3000 metres. The success of this project has demonstrated there is a much more efficient and less costly way of tackling seabed clearance and we anticipate this will lead to work on similar projects in the North Sea and other major oil and gas producing regions.”

Press Release, October 05, 2012

 

Share this article

Follow Subsea World News

Events>

<< May 2017 >>
MTWTFSS
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 1 2 3 4

UTC 2017

The subsea industry has, as all other parts of the oil & gas industry, been seriously rattled by the most severe downturn in the hydrocarbon energy era. However, the realization of what hit us and actions to be taken to sustain a healthy and profitable future is still on-going – unfortunately with thousands of colleagues paying the price by losing their job as one of the most severe consequences. At this time, there are signs that we have reached bottom in terms of most industry indicators, but few experts expect a sharp recovery. Many seem to believe that a slow recovery is what the industry needs in order to avoid an unsustainable capacity build-up, as seen in the period after the financial crisis. Considering the uncertainty of what the future will bring, this year’s UTC Program Committee have decided to challenge all of us to present ideas, experiences, technological innovations, business models and execution models for how to shape our subsea future and explain how and why subsea is the future.
UTC welcomes abstracts based on the topics listed below. If selected, please consider writing a paper in addition to the UTC presentation. From 2017, UTC papers will be published in an international database.

More info

read more >

EIC Connect Oil & Gas UAE 2017

This one-day event, focusing on the oil and gas sector, will explore opportunities in the Middle East whilst recognising the challenges that…

read more >

Decom Offshore 2017

Decom Offshore 2017 is expected to bring together a global audience of over 400 key representatives from the late life and decommissioning…

read more >

IMCA ROV SEMINAR

This seminar is designed to assist IMCA members in dealing with these, with a programme of technical and operational topics affecting…

read more >