US 12,338,711 B2
Subsea closed loop cooling system
Martin Smaadal, Hovik (NO); and Ashish Jain, Hovik (NO)
Assigned to VETCO GRAY SCANDINAVIA AS, Bristol (GB)
Appl. No. 17/995,897
Filed by VETCO GRAY SCANDINAVIA AS, Nailsea (GB)
PCT Filed Apr. 8, 2021, PCT No. PCT/EP2021/025130
§ 371(c)(1), (2) Date Oct. 10, 2022,
PCT Pub. No. WO2021/209171, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 20200457 (NO), filed on Apr. 15, 2020.
Prior Publication US 2023/0184059 A1, Jun. 15, 2023
Int. Cl. E21B 36/00 (2006.01); F04D 13/08 (2006.01); F04D 29/58 (2006.01); F28D 1/02 (2006.01); H05K 7/14 (2006.01)
CPC E21B 36/001 (2013.01) [F04D 13/086 (2013.01); F04D 29/5813 (2013.01); F28D 1/022 (2013.01); H05K 7/14337 (2022.08)] 11 Claims
OG exemplary drawing
 
1. A closed loop subsea cooling system with a closed loop cooling circuit comprising:
at least one subsea cooler in the closed loop cooling circuit;
at least one topside rated electric coolant pump assembly in a dedicated sealed, gas filled, coolant pump housing in the closed loop cooling circuit;
at least one heat sink in a dedicated sealed, gas filled, electronics housing in the closed loop cooling circuit with an operating pressure independent of water depth; and,
at least one coolant volume compensation unit in the closed loop cooling circuit;
whereby the at least one electric coolant pump assembly is adapted to pump coolant at least through the at least one subsea cooler, the at least one heat sink and back to the at least one electric coolant pump assembly, wherein the pressure in the dedicated sealed, gas filled, coolant pump housing and in the at least on dedicated sealed, gas filled, electronics housing is in a range between 50 kPa and 150 kPa.