Tubing string extension

Wells – Packers or plugs – Spaced sealing portions

Patent

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Details

166106, 417172, E21B 3312

Patent

active

044442530

ABSTRACT:
An apparatus adapted for use with a pump equipped tubing string disposed within a casing for use in conjunction with an oil well comprising: a tubing string extension having an upper end, a lower end and an opening extending therethrough intersecting the upper and the lower ends thereof, the upper end being connected to the depending end of the tubing string, the tubing string extension having a reduced diameter portion intermediate the upper and the lower ends thereof, at least two nozzle openings formed through the reduced diameter portion of the tubing string extension, each nozzle opening having one end intersecting the outer peripheral surface of the tubing string extension and an opposite end portion intersecting the opening extending through the reduced diameter portion of the tubing string extension, the fluid passing from the reduced diameter portion of the tubing string extension resulting in a pressure reduction causing fluid to be drawn through the nozzle openings in the tubing string extension and into and through the opening in the tubing string extension; an upper and a lower seal assembly, each seal assembly surrounding the tubing string extension, the upper and the lower seal assemblies being disposed on the tubing string extension so that the intersections of the nozzle openings with the outer peripheral surface of the tubing string extension are disposed generally within the space between the upper and the lower seal assemblies, the upper and the lower seal assemblies each being adapted to sealingly engage the tubing string extension and the casing; and vent means for venting gas existing generally below the lower seal assembly through the lower and the upper seal assemblies to substantially reduce the presence of gas in the area near the intersections of the nozzle openings with the outer peripheral surface of the tubing string extension.

REFERENCES:
patent: 2290141 (1942-07-01), Burt
patent: 3551074 (1970-12-01), Stout
patent: 4354554 (1982-10-01), Calhoun et al.

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