US 11,939,831 B2
Device, system and method for collecting samples from a bed of a waterbody
Peter Nicolaas Looijen, Leidschendam (NL); and Jamshid James Gharib, Leidschendam (NL)
Assigned to FNV IP B.V., Leidschendam (NL)
Appl. No. 17/046,697
Filed by FNV IP B.V., Leidschendam (NL)
PCT Filed Apr. 12, 2019, PCT No. PCT/NL2019/050219
§ 371(c)(1), (2) Date Oct. 9, 2020,
PCT Pub. No. WO2019/199171, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 2020764 (NL), filed on Apr. 13, 2018.
Prior Publication US 2021/0140258 A1, May 13, 2021
Int. Cl. E21B 25/18 (2006.01); B63B 21/20 (2006.01); E21B 49/02 (2006.01); G01N 1/08 (2006.01)
CPC E21B 25/18 (2013.01) [B63B 21/20 (2013.01); E21B 49/025 (2013.01); G01N 1/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A device for collecting samples from a bed of a waterbody, the device comprising:
a control unit to be positioned in a remote position;
a top lift unit attached to a lifting and lowering unit of a vessel via a cable, such that the top lift unit can be lifted and lowered relative to the bed of the waterbody;
a corer unit releasable attached to the top lift unit by a fixation unit and arranged for being at least partly driven into layers of the bed of the waterbody to collect the samples from the bed, when released from the top lift unit; and
a depth stabilizer configured to keep the corer unit and top lift unit stable in a vertical direction when they are attached and to level the top lift unit after the corer unit is released from the top lift unit,
wherein the top lift unit comprises a positioning unit bi-directionally communicating with the control unit for controlling the position of the corer unit.