Petroleo Brasileiro S.a. - Petrobras

Zadson D Franco

Carlos Nagib Khalil

Oswaldo D Pereira, Jr

Demostenis A Barreto

A process for the thermo-chemical cleaning of storage tanks which contain sludges from petroleum oil or related products. The process is carried out by the combined action of an organic solvent and the generation of nitrogen gas and heat, whereby produced heating in situ, agitation by turbulence and flotation of the fluidized sludge, which after being collected and transferred to tanks or desalting units can be reintroduced in the usual refining flow.

Process for the thermo-chemical cleaning of storage tanks

The invention concerns a mechanical system which permits the use of ball sealers as diversion agents in the acidizing of productive hydrocarbon formations, by associating the advantages of mechanical diversion to the advantages of the use of ball sealers, whatever their density. The mechanical system comprises a packer (7), a swivel (18), a centralized tail (9), a ball ejection port (10) and two cups (11). The mechanical system operation involves the adequate positioning of each of its components in such a manner as to permit the ball sealers to attain sufficient velocities to be driven mechanically to their targets.

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Aracaju, Brazil

Zadson D Franco