Disengagable burr mill

Wells – Processes – Cleaning or unloading well

Reexamination Certificate

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Details

C166S055700, C166S066500

Reexamination Certificate

active

10493009

ABSTRACT:
A downhole tool for use in the removal of burrs or other unwanted material from an inner surface of a pipeline, well casing or other tubular. The tool has a plurality of milling elements, which may be biased against the surface or retracted from the surface to disengage the tool from the tubular. A drop ball mechanism with a fluid by-pass is described for disengaging the milling elements.

REFERENCES:
patent: 1764373 (1930-06-01), Wells et al.
patent: 3105562 (1963-10-01), Stone et al.
patent: 5293945 (1994-03-01), Rosenhauch et al.
patent: 5361859 (1994-11-01), Tibbitts
patent: 6615933 (2003-09-01), Eddison
patent: 1012545 (2000-12-01), None
patent: 2352747 (2001-02-01), None

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