Rolling cutter drill bit
This patent describes a rolling cutter drill bit for drilling through underground formations, the bit comprising: a main body having an upper end adapted for interconnection in a drilling string; a plurality of legs extending downwardly from the body, each having an inwardly projecting bearing journal formed thereon; a generally frustoconical cutter rotatably mounted on each of the bearing journal, having a rotational axis generally coinciding with the central axis of the journal, and having a plurality of hard metal cutting elements inserted therein and protruding from the surface thereof; bearing means between each of the cutter and bearing journal; the drill bit having a cutting diameter defined by the radially outermost located of the cutting elements on each of the cutter and having a bit rotational axis passing longitudinally therethrough; and, the central axes of the journals being offset from the bit axis by an amount ranging from about one-sixteenth inch per inch to about one-eighth inch per inch of bit cutting diameter.
- Assignee:
- Reed Rock Bit Co., Houston, TX
- Patent Number(s):
- US 4657093
- OSTI ID:
- 6591228
- Country of Publication:
- United States
- Language:
- English
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BEARINGS
CONDUCTOR DEVICES
CONNECTORS
CUTTING TOOLS
DESIGN
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
ELECTRICAL EQUIPMENT
EQUIPMENT
JOURNAL BEARINGS
MOTION
NATURAL GAS WELLS
OIL WELLS
OPERATION
PIPES
ROTATION
TOOLS
WELL DRILLING
WELLS