Jack-up selection for overseas operation based on leg retracting ability

To solve the probable problems of spud-can deep penetration and stuck in an overseas project, jack-up choosing calculation is carried on. Firstly, lots of geotechnical information around the well sites are collected and processed to get approximation of geotechnical data for the suggested sites, based on which the depth of spud-can penetration and leg retracting resistance are calculated. To overcome the insufficiency of retracting ability of the jack-ups, jetting valves and jetting control system are invented to eliminate or minish conglutination resistance between spud-can and underlying clay, shear force around the excavation and weight of the soil overlying the spud-can. Finally, 3 jack-ups are suggested to deploy on any well sites and one jack-up is supposed to deploy only on a specific site.