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US 2007/0181340 A1Published application
Drilling apparatus with percussive action cutter
AssigneeAndergauge Limited
InventorAlan Eddison
Life of this patent
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Abstract
A drilling apparatus includes a cutting structure defined by a percussive action cutter and at least one other cutter. The percussive action cutter is adapted to be urged in a drilling direction by hydraulic pressure force, while the other cutter is urged in a drilling direction by mechanical force.
Claims39
A drilling apparatus comprising:
- a cutting structure defined by at least one percussive action cutter and at least one other cutter, the at least one percussive action cutter being adapted to be urged in a drilling direction by hydraulic pressure force;
- and
- a surface indicator to alert that the other cutter is cutting at a faster rate than the percussive action cutter.
A drilling method comprising the steps:
- providing drilling apparatus comprising a cutting structure defined by at least one percussive action cutter and at least one other cutter;
- urging the at least one percussive action cutter in a drilling direction by hydraulic pressure force while urging the at least one other cutter in a drilling direction by mechanical force;
- and
- identifying that the percussive action cutter is cutting at a faster rate than the at least one other cutter.
1 more element
A drilling apparatus comprising:
- a cutting structure defined by at least one percussive action cutter and at least one other cutter, the at least one percussive action cutter being adapted to be urged in a drilling direction by hydraulic pressure force and the at least one other cutter being adapted to be urged in said drilling direction by mechanical weight, the cutters having a preferred relative position range;
- and
- a cutter position indicator providing an output signal if the relative position of the cutters moves outside said preferred range.
A drilling apparatus comprising:
- a cutting structure defined by at least one percussive action cutter and at least one other cutter;
- and
- a percussive action cutter excess weight warning indicator.
Dependencies are inferred from the claim text.