Abstract: The present invention addresses to the design of a Polyvalent Riser Balcony for an FPSO-type floating unit and the sequencing of the functions of the wells interconnected to the SPU in advance, even before the discovery of the field; consequently, without having the definition of the reservoir drainage plan and the subsea layout. The Polyvalent Riser Balcony can be applied to any development design for new offshore fields. The application of the invention will allow the anticipation of the FPSO production design, as well as its construction and assembly, with great value generation for the production development plans.

Abstract: A liquid/gas helical separator operates on a combination of centrifugal and gravitational forces. The separator includes a primary separator formed basically by an expansion chamber, a secondary separator formed basically by a helix for directing the flow, a tertiary separator which consists of a reservoir or gravitational-separation tank and of a transition region between the primary and secondary separators, which consists of at least two variable-pitch helixes whose inclination varies from an angle of 90.degree. to the angle of inclination of the constant-pitch helix of the secondary separator with the function of providing a gentler flow of the liquid phase at the transition between the first two separators.