Abstract: A method to demetal and de-ash oil feedstock. The method includes adding direct steam and sulfuric acid to oil feedstock to form acid treated oil, the sulfuric acid to strip the oil feedstock of metals, adding de-emulsifier to the acid treated oil feedstock to aid in phase separation, and settling the acid treated oil feedstock to separate into clarified oil, water, and a rag layer. The method includes centrifuging the clarified oil with a centrifuge running in a 3 phase configuration to remove water and solids from the clarified oil, and ensuring proper temperature and adding triethanol amine (TEA) to the centrifuged clarified oil to flocculate asphaltenes in the centrifuged clarified oil, creating TEA treated oil. The method includes centrifuging the TEA treated oil with a centrifuge running in a 2 phase configuration to remove the asphaltenes from the TEA treated oil and create marine fuel.

Abstract: The system and method permits the use of equipment that is located exterior to a container, such as a tank container liquid hydrocarbon material within which a sludge deposit has accumulated, and then inserted, as through an access opening in the side of the tank. In addition to other innovations, an improved hydraulic equipment positioning arrangement is provided, for both positioning, inserting and withdrawing the conduit structure and end effectors for accessing the sludge or sediment, which may include a leveling element preferably in the form of an hydraulic system that operates to move the assembly in a vertical plane as well as a rotary driven hydraulic system for driving the conduit structure along a long axis.