Wells – Processes – Graveling or filter forming
Patent
1994-12-28
1997-04-15
Dang, Hoang C.
Wells
Processes
Graveling or filter forming
166 51, 166120, 166126, 166387, E21B 4304, E21B 331295
Patent
active
056200501
ABSTRACT:
A hydraulic oil and gas well downhole packer apparatus for use in a well casing below a wellhead and in combination with a coil tubing unit provides a tool body having a longitudinally extending tool bore and an upper end portion that connects to the lower free end of the coiled tubing unit during use. The tool body includes an inner elongated hollow mandrel with a hydraulic piston movable disposed upon the external surface of the mandrel. The piston is movable between an initial "running" position and a final "setting" position. An external sleeve is engaged by the piston when it moves between the running and setting positions, the external sleeve engaging slips that expand to anchor the tool body to the well casing. An annular packer member is expandable responsive to sliding movement of the external sleeve and is positioned below the slips for forming a seal between the tool body and the casing at a position near the lower end portion of the tool body.
REFERENCES:
patent: 4441561 (1984-04-01), Garmong
patent: 4688634 (1987-08-01), Lustig et al.
patent: 4823882 (1989-04-01), Stokley et al.
patent: 4860831 (1989-08-01), Caillier
patent: 4936387 (1990-06-01), Rubbo
patent: 5069280 (1991-12-01), McKee et al.
patent: 5174379 (1992-12-01), Whiteley et al.
patent: 5291947 (1994-03-01), Stracke
patent: 5305828 (1994-04-01), White et al.
1993 World Oil's Coiled Tubing Handbook.
A publication entitled "Louisiana Oil Tools Inc., Model 12 Sand Control System".
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