A system and method for systematically and economically recovering
formation liquids from the bottom of a petroleum well are disclosed. In a
preferred embodiment, the system and method are passive in that they
utilize the existing formation pressure of the well to remove fluid
build-up across the perforations of the well bore in a manner that is
completely free from surface control. The system is comprised of
strategically placed carrier subs with installed pressure regulating
devices. These carrier subs are regularly spaced below the production
packer, along the tail pipe section of the production tubing string and
facing the perforated intervals of the well bore. The pressure of the
trapped formation gas above the accumulating formation liquid is
insufficient to remove all of the formation liquid within the entire
length of the tubing string 13. However, an open pressure regulating
device mounted on the tailpipe section of the tubing string allows a
smaller portion of the formation liquid within the tubing string to be
produced to the surface using the existing formation pressure. By
systematically removing portions of the formation liquid from within the
tubing string using the regularly spaced pressure regulating valves, the
formation fluid build-up across the perforations is eliminated, and the
petroleum well is able to produce at higher rates and for a longer period
without intervention.