Bi-Axial Drill Bits and Bit Adaptors
AssigneeTercel Oilfield Products USA LLC
InventorsKenneth J. Anton, Michael J. Harris
Life of this patent
Estimating the term…
Abstract
Drill bits comprise a body having an uphole end and a downhole end. The uphole end is adapted for connection to a tool assembly for rotating the drill bit. The tool assembly has an axis of rotation. The downhole end has one or more cutting members adapted for removing material in contact with the downhole end when the drill bit is rotated. The body has an uphole major axis and a downhole major axis. The uphole axis and the downhole axis are offset from each other. The uphole axis is central to the uphole end and is aligned with the tool assembly axis of rotation. The uphole axis defines an axis of rotation for the drill bit. The downhole axis is central to the downhole end.
Claims20
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An adaptor for a drill bit, said adaptor comprising:
- (a) a body having an uphole end and a downhole end;
- (b) said uphole end being adapted for releasable connection to a tool assembly for rotating a drill bit, said tool assembly having an axis of rotation;
- (c) said downhole end being adapted for releasable connection to a drill bit, said drill bit having an axis of rotation;
- (d) said body being adapted to transfer rotation of said tool assembly to said drill bit in both directions and having an uphole major axis and a downhole major axis,
- (e) said uphole axis being adapted for alignment with said tool assembly axis of rotation;
- (f) said downhole axis being adapted for alignment with said drill bit axis of rotation;
- (g) wherein said uphole axis and said downhole axis are offset from each other.
A method of performing an operation to drill out obstructions in a well tubular, said method comprising:
- (a) running a tool assembly into said tubular, said tool assembly having an axis of rotation and comprising a drill bit having one or more cutting members at its downhole end adapted for removing material from said obstruction, said downhole end of said tool bit having a central axis offset from said tool assembly axis of rotation;
- (b) rotating said tool assembly to cause said drill bit to drill out said obstruction.
Dependencies are inferred from the claim text.