Patent ID: 8011857

Claim:
An extraction system for removing a removable footing of a marine structure, said extraction system comprising: a pump for supplying pressurized fluid to a chamber disposed in said footing; and a plurality of spaced apart outlets associated with the chamber such that the outlets are formed on a base of said footing that bears on the marine floor on which the marine structure is supported; wherein each outlet has a porous member disposed across its opening, said porous member has a predetermined porosity and a predetermined surface area, such that the pressurized fluid is operable to exude out of the surface area of the porous member, without fluidizing or channeling the soil beneath the footing, to form a film or layer of pressurized fluid between the base external of the footing and the soil for reducing negative soil excess pore pressure when an uplifting force is applied to the footing during extraction of the marine structure, thereby easing the induced suction at the base of the footing and expediting removal of the marine structure.