Wells – Packers or plugs – With central conduit and fluid port to space outside
Patent
1987-03-13
1988-08-23
Novosad, Stephen J.
Wells
Packers or plugs
With central conduit and fluid port to space outside
166191, E21B 33124, E21B 33126, E21B 3708
Patent
active
047654058
ABSTRACT:
Disclosed is an improved tool for washing the perforations in an oil or gas well bore casing. The tool includes a tubular mandrel having orifices, between pairs of pressure sealing packer cups, for discharging a cleaning fluid into the area between the tool and the casing. The longitudinal spacing between the packer cups is variable by means of variable length spacer sleeves placed between the packer cups. The mandrel having an axial internal by-pass tube for passing cleaning fluid and debris through the mandrel. The by-pass tube having a telescoping section for accommodating the elongation and contraction of the tube due to temperature changes. The by-pass tube also permits entering the tool into the casing by eliminating vacuum or pressure build-up in the casing.
REFERENCES:
patent: 2239296 (1941-04-01), Robinson
patent: 2274756 (1942-03-01), Travers, Jr.
patent: 2308072 (1943-01-01), Granger
patent: 2360311 (1944-10-01), Ausburn et al.
patent: 2426164 (1947-08-01), Breukelman
patent: 3396798 (1968-08-01), Burns et al.
Massie Lewis E.
Novosad Stephen J.
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