Draga cilindrica
This instrument has been utilised since the seventies to tear up and collect rock samples, concretion and calcrete from slope outcroppings.
The dredge is composed of a large thick iron cylinder: 500 mm in diameter and 1200 mm in length, 250 Kg in weight. The front is equipped with alloy steel teeth, whereas the rear part carries a grill with square holes large enough to allow the mud to flow through while keeping the blocks of the rocky outcrop in.
The dredge operation has to be supported by an adequate winch, able to drag and support stress of up to 10.000 Kg.
It is recommended to apply a count-meter and a dynamometer to the winch, in order to verify the tension data on the wire on-line. Simultaneously this data can be sent to a program that will graph the trend.
Divulgazione
G. Busatti, P. Colantoni, A. Magagnoli, M. Mengoli – Il dragaggio del fondo marino strumentazioni e metodologie – Rapporto Tecnico n. 14, IGM – CNR, Bologna, 1981.
Cylindrical Dredge
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Case History
March 5, 2024
2023 Piston cores in the Gulf of Lion
Piston cores in the Gulf of Lion for a pre-engineering survey of a floating Wind Farm, performed for TecnoAmbiente. Piston cores was performed with recovery rates up to 91% using Angel Descent…
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2014 Piston core. Floating Wind Farm in the Gulf of Lion.
Piston core drilling in the Gulf of Lion for a pre-engineering survey of a floating Wind Farm, performed for Igeotest (Client: EDF). Piston core drilling was performed with recovery rates up to 98%.……
January 13, 2021
2013 Piston Cores. Neptun Block Project in Black Sea
Piston Cores for Neptun Block Project in Black Sea, carried out for D’Appolonia SpA (Contractor Fugro Alluvial, Client EXXON). Were executed 14 Piston Cores 15m long between 356 and 1090 meters…
January 13, 2021
2013 Piston Cores. Environ Srl (Client Syndial SpA – ENI Group)
Piston Cores in an Italian Lake, carried out for Environ Srl (Client Syndial SpA – ENI Group). For the first time were performed 6 Piston Cores in a lake up to 10 meters in length, with the aim of…
January 13, 2021
2012 Piston Cores. C.N.R. Adriatic Sea
Piston Cores in Adriatic Sea, carried out for ISMAR Bologna-CNR. Has been done 9 Piston Cores of 15 meters. 4 of these has been performed using the Angel Descent. For the first time, and with great…
January 13, 2021
2011 Piston Cores.
IGI Italy-Greece
Piston Cores for IGI Poseidon Project, carried out for D’Appolonia SpA (Contractor Fugro, Client Edison). Has been executed 23 Piston Cores between 65 and 1350 meters water depth. The setup of…
January 13, 2021
2011 Piston Cores. Italian Harbour
Piston Cores for the engineering of an harbor design, carried out for Fincosit SpA. Has been requested to sample in 5-7 metres of water with a corer 8 metres long. To achieve this request has been…
January 13, 2021
2010 Piston Cores. Pre-engineering in Egypt
Piston Cores in Egypt for a pre-engineering survey, carried out for D’Appolonia SpA (Sub-Contractor Fugro, Contractor Technip, Client Burullus). Has been performed 15 metres cores and obtained…
January 13, 2021
2009 Cores with Carma® Corer SW-104. Italian Lakes
Cores with CARMA® Corer SW-104 in Italian lakes, carried out for Environ Srl (Client Syndial SpA). Has been executed more than 100 cores with the scope of achieve undisturbed samples. The criticality…