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POST TRENCHING

GEO PTM

The GEO PTM belongs to the last generation of underwater pipeline post-trenching machines, particularly suitable for seabed being from loose to medium-dense type. Compared to previous models, this machine can be equipped with larger cutting wheels, in order to reach deeper trench depths (up to 3m per pass, with the chance to carry out further passes).

JOLLY PTM

The Jolly PTM has been especially designed to perform trenching works on small-diameter pipes, which risk being exposed to higher stresses.
Its main characteristic is its weight, which is lighter compared to the other machines.

SPEEDY PTM / LEO PTM

The SPEEDY PTM key feature consists in the ability to operate in shallow water and shore approach areas (in a few meters water depth).
This PTM is able to carry out pipeline post-trenching, without building a cofferdam and the inconvenience of potential wave action ditch infilling (by carrying out further passes).
In this way, this method helps saving on post-trenching operational costs and on laying equipment stand-by lead-times.
The new generation of Speedy PTM is LEO PTM, which is currently the most adaptable, suitable for various water depths and for various seabed types.
LEO PTM can operate in both deep water, if equipped with a ballast tank, and in a few centimeters water depth up to shore approach, without the ballast tank.
LEO PTM is the most suitable machine for performing in different soil conditions (from loose to hard soil) and the most adaptable to the various project specifications.

LASER PTM / RACK PTM

The LASER PTM has been the first underwater pipeline post-trenching machine that SEA has designed and assembled in order to operate in hard seabed, with sedimentary rocks such as calcarenite, sandstone and limestone.
By improving the Laser PTM specifications, SEA has designed and assembled the RACK PTM, an underwater pipeline post- trenching machine, that is more resistant and with higher trenching performance in rock. By employing this PTM, SEA has successfully carried out projects in rocky areas where the post-trenching method had never been considered feasible.

COMBO PTM / PIPER PTM

The COMBO PTM is born from the combined experience of the past PTM models.
The machine’s frame can be customized on-site and adapted to project requirements.
Furthermore, the cutting wheels and their arm supports can be replaced, in order to operate on pipes that can range from 6″Ø to 50″Ø and in seabed that go from soft to particularly hard (up to 5Mpa).
The Combo PTM is therefore ideal in projects where different diameter pipelines must be trenched, in various seabed materials.
The PIPER PTM is a pipeline post- trenching machine that has been specifically designed for bundled and piggy-backed pipelines.
The PIPER frame can be equipped with specific driving wheels that can run on piggy-back systems by avoiding any risk of pipeline/cable damage.
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