Drag-type drill bit
Patent
·
OSTI ID:6591638
A drag-type drill bit is described comprising: a bit body having an operating end face; and a multiplicity of superhard cutting elements interlocked to the body. The cutting elements define a multiplicity of cutting areas dispersed over the operating end face of the bit body in a pattern adapted to cause the cutting areas to cut an earth formation to a desired three-dimensional profile as the bit body is rotated, the cutting areas having back rake angles which become more negative with distance from the profile.
- Assignee:
- NL Industries, Inc., New York, NY
- Patent Number(s):
- US 4660659
- OSTI ID:
- 6591638
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CUTTING
DESIGN
DRAG
DRILL BITS
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
HARDNESS
INCIDENCE ANGLE
MACHINING
MECHANICAL PROPERTIES
MOTION
NATURAL GAS WELLS
OIL WELLS
ROTATION
WELL DRILLING
WELLS
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CUTTING
DESIGN
DRAG
DRILL BITS
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
HARDNESS
INCIDENCE ANGLE
MACHINING
MECHANICAL PROPERTIES
MOTION
NATURAL GAS WELLS
OIL WELLS
ROTATION
WELL DRILLING
WELLS