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Helix ESG’s T1200 Trencher Completes First North Sea Oil and Gas Project

Helix Energy Solutions Group’s new T1200 burial and trenching unit is quickly establishing a positive track record following the completion of an oil and gas project in the North Sea. The T1200 features a 1,200hp jet trenching spread, capable of burying product in water depths to 3,000m (10,000ft).

T1200 was deployed to bury a 14km long (8.7 mile), 10 inch export pipeline that included a 3 inch piggyback methanol line. The project specialization called for the line to be buried 2m (6.5ft) deep, with one meter of covering fill. The subsea trenching unit’s water jetting system trenched and simultaneously buried the pipeline under 1.4m (4.5ft) of sand in a continuous run that took just 48 hours.

The successful project is the T1200’s first oil and gas operation, and proves the versatility of the asset which has also been deployed to trench and bury high voltage undersea cables used to transport electricity from offshore wind farms to onshore power stations.

The T1200, operated by Helix ESG’s robotics subsidiary, Canyon Offshore, performed its first trenching job in early July 2012 at the Sheringham Shoal offshore wind farm trenching and burying an approximately 700m (2,300ft) long power cable between the wind turbines. Out of the 80 sections required in the field, the T1200 trenched and buried 37.

The T1200 was built in the UK by Forum Energy Technologies’ Perry Slingsby Systems ROV brand. The T1200’s design was based around the time proven T750 trencher( also owned and operated by Canyon Offshore) but has over 50 percent greater power and the capacity to trench larger diameter products (36 inches) to burial depths of 3m (10ft) depending on soil strength.

Subsea World News – Helix ESG’s T1200 Trencher Completes First North Sea Oil and Gas Project.

PHOTOS: Express installing subsea manifolds « Helix Currents

Photos courtesy of Helix Subsea Construction Field Engineers Robert Bailey & Matt Gonzales.

Taken on board Helix ESG’s pipelay vessel, Express, these photos show two Pipeline End Terminal manifolds (PLETS) as they are hoisted off an adjacent supply boat and lowered down to the seabed.

A PLET is used on one, or both ends of pipelines to provide connection point from the pipeline to existing subsea structures in place.  The existing structure may be a subsea tree, another PLET or a manifold and are connected by a jumper.  The PLETs and other subsea structures have upward looking connectors while the jumpers have downward looking connectors.  This configuration allows the jumpers to be installed using Remotely Operated Vehicles (ROVs).

Helix Subsea Construction, a business unit of Helix ESG, is installing this PLET as part of the overall scope of Subsea Umbilical, Riser and Flowline (SURF) work for Noble Energy at the Noa Field, offshore Israel. The field is in approximately 2,556ft of water (779m) and is being developed for natural gas.

Source: PHOTOS: Express installing subsea manifolds « Helix Currents.

Noble Energy Linking Noa and Pinnacles to Mari B Platform

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Noble Energy and Delek Group have started linking Noa and Pinnacles offshore natural gas fields to the Mari B production platform, according to the Israel’s financial newspaper Globes.

Helix ESG’s reeled pipelay vessel, Express, which in April arrived at the port city of Haifa, Israel has started SURF (Subsea Umbilicals, Risers and Flowlines) work.

According to the data on Noble Energy’s website, Noa will, once developed, provide 100 million cubic feet per day (MMcf/d) of production by September 2012.

Development of the Noa field is geared to allow for additional supplies of natural gas to the Israeli market, until the start of natural gas supplies from the Tamar project.

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Texas: Helix Well Cap Arrival at Ingleside, Texas Shorebase

Helix Well Cap Arrival at Ingleside, Texas Shorebase

Designed for subsea oil spill containment the Helix Fast Response System (HFRS) Well Cap consists of an 18-3/4″ –10ksi H4 hydraulic wellhead connector and a 13-5/8″-10ksi dual ram block with an 18-3/4″-10ksi H-4 mandrel profile up. The connector can be changed out to any other type of connectors via the use of adapters. The cap has a 13-5/8″ bore and side outlets 4-1/16″-10K BX-155. All functions on the Well Cap will be ROV operable. Two 3-3/16″ vents relieve high pressure and/or flow rate.

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Uploaded on May 11, 2012

Helix Well Cap Being Loaded Out at Ingleside, Texas Shorebase

Anyone can see this photo All rights reserved
Uploaded on May 11, 2012

Helix Well Cap Being Loaded Out at Ingleside, Texas Shorebase (2)

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Uploaded on May 11, 2012

Helix Well Cap Being Loaded Out at Ingleside, Texas Shorebase (3)

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Uploaded on May 11, 2012

Flickr: Helix ESG’s Photostream.

Subsea Trenching Beast – A Look At The Helix T1200

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Operated by Canyon Offshore, Helix ESG’s subsea robotics unit, the T1200 will be one of the largest and most powerful ROVs in the world. (Photo: Helix ESG)

By John Konrad On April 5, 2012

Need to cut a 30 foot deep trench in the bottom of the ocean floor to run flowlines out to a new production rig?

No problem.  Helix Energy Solutions’ new T1200 subsea trenching behemoth is just what you’re looking for.image

Looking like a mix between a space ship and an Abrams battle tank, the T1200 is a massive piece of equipment weighing in at over 33 tons (30,000kg) and towering to a height of 12.6ft (3.8m).

While not yet in service, construction of the T1200 trenching and burial unit is one step closer to entering service following testing and installation of its two enormous caterpillar tracks.

The vehicle also got wet for the first time in the manufacturer’s test tank in central England. Still undergoing final fitting, the T1200 is expected to be delivered to Helix ESG this summer and will begin work on board another new asset to Helix ESG’s ROV Support Vessel fleet, the Grand Canyon.

The 1,125hp ROV will use high-powered water jets to cut up to 30 feet into the seafloor and lay power cables, or other tubular products like oil and gas pipelines.

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The Grand Canyon is a new build offshore construction vessel that will host a new T1200 jet trencher, two 200HP XLX ROV systems onboard along with two more ROV systems. The Grand Canyon is 125m x 25m and has a 250t crane, monopool, dynamic positioning systems and helideck. Accommodations are for up to 108 personnel and will be deployed for work in Europe’s growing offshore wind farm projects where her ROVs will conduct power cable trenching and burial operations. (Image: Helix ESG)

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