T1400 Trenching Systems


The T1400-1 and T1400-2 trenching systems have the capability to perform Jet trenching in soils of up to 100 KPA and mechanical chain cutting of soils of up to 250 KPA.

The T1400-1 and T1400-2 systems comprise a trenching vehicle consisting of a common trenching module with a customized launch and recovery system (LARS) rated at Lloyds sea state 6, which may be configured as either a tracked Jet Trenching only vehicle or alternatively configured to Hybrid Jet / Chain Cutting mode.

In Jet Trenching only mode, the T1400-1 and T1400-2 systems have 1050kW (1400hp) of available power, 750kW of this power is via variable speed drivers (VSD) electric motors with direct drive high pressure water pumps. In addition, low pressure backwash is delivered by the means of 2 x 100kW hydraulically driven water pump.

The Jetting tools have twin-legged parallel jet swords which are designed for Jet trenching up to 3 m in soil conditions ranging from 5 KPA to 100 KPA (using 2 m & 3 m jetting swords); and are capable of accommodating products up to 900 mm in diameter. The sophisticated Jetting systems also have the capability for backwashing, eduction and back filling of seabed material.

T1400-1 and T1400-2 trenching systems are illustrated when they are operated in the Hybrid Jet / Chain Cutting mode. In this mode the T1400-1 and T1400-2 system is configured with a 2 m x 400 mm chain cutter coupled with an instrumented cable bell mouth and depressor with a 3 m minimum bend radius (MBR) and two product-loading arms. In addition, a dedicated 375kW motor delivers low pressure direct drive water jetting to make it a true Hybrid Jet / Chain Cutting system. In this mode, the T1400-1 and T1400-2 systems have the capability to accommodate flexible products up to 250 mm diameter.

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T-1400 Subsea Jet Trenchers