US 12,270,169 B2
Method for determining a crane or cantilever operations envelope on a jack-up platform unit, jack-up platform unit
Kayo Vanderheggen, Rotterdam (NL); and Frederik Vanhee, Putte (NL)
Assigned to GustoMSC B.V., Schiedam (NL)
Appl. No. 17/690,620
Filed by GustoMSC B.V., Schiedam (NL)
PCT Filed Sep. 11, 2020, PCT No. PCT/NL2020/050563
§ 371(c)(1), (2) Date Mar. 9, 2022,
PCT Pub. No. WO2021/049937, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 2023832 (NL), filed on Sep. 13, 2019.
Prior Publication US 2024/0043251 A1, Feb. 8, 2024
Int. Cl. B66C 23/90 (2006.01); B66C 13/16 (2006.01); E02B 17/02 (2006.01); E02B 17/00 (2006.01)
CPC E02B 17/021 (2013.01) [B66C 13/16 (2013.01); E02B 2017/006 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for determining a crane or cantilever operations envelope of a crane or cantilever mounted on a jack-up platform unit, the method comprising:
applying a pre-load to at least one leg of the jack-up platform unit;
monitoring at least one characteristic of said at least one leg to which the pre-load has been applied, during a predetermined time interval;
monitoring the leg characteristic and/or a gradient of the leg characteristic during said time interval;
evaluate whether the leg characteristic is stable during said time interval;
repeating the above steps until during said time interval the leg characteristic is stable whereby the leg characteristic remains within the predetermined threshold and the gradient of the leg characteristic remains within the predetermined limit; wherein the value of the actual achieved pre-load is the leg load value associated with the thus achieved stable leg characteristic;
determining an actual crane or cantilever operations envelope by calculating, per leg, the leg load capacity based on the actual achieved pre-load value and translating the calculated leg load capacity to a crane or cantilever operations capacity.