DOP Submersible dredge pumps

Dredging quay walls for improved harbour access

Location: Tangguh, West-Papua, Indonesia
Period: Q2-4/2019
Product type: DOP150 with cutter unit
Contractor: Adhiguna Keruktama
DOP150 cleaning harbour for improved access

At Tangguh, West-Papua, the harbour had to be made accessible for vessels bringing in the equipment for the construction of a new oil and gas terminal. Over the years the mooring locations along the quay walls have silted up; these needs dredging up to -16 m before the vessels can moor safely.

Trial run of the DOP150 mounted on the amphibic excavator

For the dredging project, a hydraulically driven DOP150 submersible dredge pump has been used. This DOP was attached to a local amphibious excavator with a fixed connection. This rigid connection is required due to the cutter unit attached to the DOP: as the sediments are compacted due to the years they built up, the bottom material has to be broken into using the cutter unit.

For mounting the DOP onto the boom of the excavator it has been fitted out with a top plate and counter coupling

Both the DOP pump and the cutter unit will be powered by a separate power pack. This power pack has been mounted at the back of the amphibious excavator.

Easy mounting as the DOP150 is fitted out with the excavator's counter coupling

The dredge package was delivered in 1 batch, including the submersed pump unit, its exchangeable cutter head, and hydraulic hoses to connect both the pump drive and the cutter drive to the diesel-hydraulic power pack.

Dredge package delivery, including spares such as gear oil and an impeller hook for safe hoisting of the wear parts

Moreover the package included a flexible discharge hose for transporting the dredged mixture, and dredging instrumentation to enable the excavator operator to keep an eye on the dredging process from his cabin. To keep the project in full swing a batch of spares was delivered as well.

Delivering the complete dredge package, here hydraulic hoses for connecting the DOP150 to the hydraulic power pack