Wellbore Casing Cutting Tool
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United States of America Patent
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Issued Date -
Nov 13, 2014
app pub date -
Sep 28, 2012
filing date -
Oct 4, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A wellbore casing cutting tool, having multiple blades which rotate outwardly by a fluid operated mechanism, has multiple cutters on each blade. The cutters are preferably positioned on the blades such that the lowermost cutting edges of multiple cutters all bear on the surface of the casing being cut. The cutters are preferably made with a metal base, covered with hardened cutting material such as tungsten carbide or hardened cutting buttons. The metal wears away as cutting progresses, continually exposing fresh cutting surfaces. The multiple cutters permit cutting of long windows in casing walls, and the structure of the cutters results in relatively short metal cuttings, rather than long metal cuttings which can ball up downhole.
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