T-1200 Trencher


The T-1200 Subsea Jet Trencher is a purpose-built 1,200hp jet trencher for burying cables, umbilical, and flexible products in difficult seabed conditions up to 3,000m water depth.

The T-1200 Jet Trencher was built upon the vast experience of the Helix T-750 incorporating the latest technologies to meet the subsea burial challenges of today. The high-powered trenching capability of the T-1200 is optimal for burying flexible and rigid products and power cables up to 3,000m below the seabed in its current configuration and soil conditions of up to 120kpa.

The T-1200 can operate in 10m - 3,000m water depths and has project-verified experience from 10m in the North Sea to 1,850m in waters offshore Brazil.

While the jet leg current configuration allows trenching of products up to 915mm diameter, the versatility of the system can, with modifications, increase this envelope should the need arise.

Trenching speeds can vary depending on the mode of operation (tracked or skid), soil conditions, product diameter, and the depth of trench required. Speed rates in sand over 400m per hour can be attained where 80-150m per hour speeds are achievable for conditions where soils are hard to penetrate. The directly coupled water pumps and variable speed drives mean the 1,200hp system is equivalent to a conventional electro-hydraulic 1,500hp system that uses the power to water pumps less efficiently.

The CFD-modelled plenum takes the water from the pumps to the jet legs with minimal losses. The water system is designed to maximize water pressure and flow at the adjustable jetting nozzles, which are distributed on the jetting swords to fluidize in front and between the swords and, if required, taper the trench wall. These design enhancements and unrivaled burial experience make the T-1200 and T-1500 jet trenching systems the most effective burial systems in their class.

Download brochure
Dimensions

6.1m x 9.15m x 5.16m

Depth Capacity

3,000 msw

Maximum Speed (Tracked)

Forward = 2,500 m/hr

Maximum Speed (Free Flying)

Forward = 2.8 knots
Lateral = 2.0 knots

Helix Robotics T1200 Subsea Jet Trencher


Where to next?

Helix overview

We are an international offshore energy services company that provides specialty services to the offshore energy industry, with a focus on well intervention, robotics, and full-field decommissioning operations.

Experience

Our experience defines us as a company. It’s the single most important edge we can share with you.

Latest news

Keep up to date with our latest news and events.