ETA provides subsea cable consultancy and engineering services to the oil & gas industry. ETA also designs and builds a range of equipment suitable for the burial of pipelines, umbilicals and cables. ETA can provide support on all aspects of cable, pipeline, and umbilical installation and maintenance, offering services from total project management, to 'one-off' consultancy assignments, design work, planning, and technical studies.
Alongside our experience with Oil & Gas, ETA’s expertise have been acquired from their background in the installation and maintenance of subsea cable in the traditional fields of telecom, or power cable projects as well as from their extensive involvement with offshore renewables.
A sample of ETA’s varied experience in the Offshore Oil & Gas market can be found below.
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The Gjoa cable project represented a major milestone in the Oil & Gas market; supplying the floating offshore Gjoa platform with power from the shore via a seabed installed AC cable close to 100km long, and suspended dynamic cable to link it to the platform. The power from shore eliminates much of the CO2 emissions by removing the requirement for gas turbines.
ETA were contracted by system designer and main installer ABB to assist with Project and Technical Management. ETA’s work included: QA of subcontractor engineering and procedures; developments of procedures for handling termination during load, lay and platform pull; and the development of a mid-water survival system (MWSS) utilising temporary cable buoyancy to avoid the need to cut cable in sea conditions exceeding 4m Hs.
The Kirinskoye gas and condensate field is located in the Sea of Okhotsk, 28 kilometres to the north-east offshore the Sakhalin Island. The sea depth in the vicinity of the field is 90 meters.
ETA were contracted by Jan de Nul to develop method statements and oversee the cable installation operations for a series of high precision pre-terminated umbilicals for the gas field.
This project involved the installation of five cable links as part of the Shell Associated Gas Gathering (AGG) System. The cable was to be buried to 2.5 m below the bed of the Warri River and Estuary.
Challenges to the cable lay included 16 pipeline crossings, the narrow navigable channel, and sparse survey information.
Mike Nichols, the ETA project manager, provided support from the bid stage through to completion. ETA also designed and built a custom lay spread for the MFK lay barge St Patrick. A team of 7 ETA personnel including operations superintendent and 6 technicians was provided to perform the cable lays and burial.
The CNS Fibre Optic Project involved the installation of a high integrity fibre optic link connecting the land terminal at Cruden Bay to the Forties Charlie Platform, North Everest Platform and Ula Platform. When cable faults occurred during pre-installation trials ETA were commissioned as cable specialists to review all technical aspects of the project and then worked closely with Stolt Offshore to ensure a successful installation. After the completion of this review ETA provided a Senior Project Engineer to work closely with Stolt Offshore to develop the installation procedures, to modify the spread and to re-mobilise the 'Discovery'.
Services from ETA included: Improved cable path design, Modifications to the plough, Procurement of new linear cable engine including lay control and monitoring system, development of cable testing and repair capability, development of burial protection criteria, support during mobilisation, support during trials and initial period of installation.