Wells – Processes – Cleaning or unloading well
Patent
1995-07-19
1996-10-15
Novosad, Stephen J.
Wells
Processes
Cleaning or unloading well
166318, 166319, 166335, 166222, 175317, E21B 2100, E21B 3700
Patent
active
055645003
ABSTRACT:
A drill stem diverter tool for removing gelled drilling fluid and filter cake from the side of a well bore. The apparatus comprises a housing adapted to be connected into a drill string. The housing includes a plurality of diverter ports which communicate a central opening of the housing with a well annulus. A valve means which can be moved from a first position which blocks the diverter ports to a second position which opens the diverter ports is disposed in the central opening. The diverter ports are angled and offset from the center line of the housing so that the fluid exiting the ports creates a turbulent circular motion. A stop is provided to limit the movement of the valve means. The valve means may also be moved from its second position back to its first position to block communication to the well annulus through the diverter ports.
REFERENCES:
patent: 1279333 (1918-09-01), Green
patent: 2212491 (1940-08-01), Appleby
patent: 2828107 (1958-03-01), Bobo
patent: 2882020 (1959-04-01), Carr et al.
patent: 3066735 (1962-12-01), Zingg
patent: 3116800 (1964-01-01), Kammerer
patent: 3795282 (1974-03-01), Oliver
patent: 3907046 (1975-09-01), Gaylord
patent: 4518041 (1985-05-01), Zublin
patent: 4645006 (1987-02-01), Tinsley
patent: 4749044 (1988-06-01), Skipper et al.
patent: 4967841 (1990-11-01), Murray
patent: 5368103 (1994-11-01), Heathman et al.
Drawing identified as Exhibit A showing prior art fluid diverter.
U.S. patent application Ser. No. 08/250,412.
Drawing identified as Exhibit B showing a jetting tool.
Murray Dick A.
Rogers Henry E.
Webb Earl D.
Halliburton Company
Novosad Stephen J.
Rahhal Anthony L.
Roddy Craig W.
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