PDC cutter and bit
Patent
·
OSTI ID:5893755
The invention comprises a drag-type drill bit and a cutting member therefor. Each of the cutting members comprises a stud having a shank adjacent one end mounted in a respective bore in the bit body and a head adjacent the opposite end projecting outwardly from the bit body. The head has a lip formation adjacent the juncture of the head and shank. The lip extends laterally outwardly with respect to the shank to overly the outer surface of the bit body adjacent the respective bore. The cutting face is concave, presenting a plurality of different back rake angles, which angles increase with distance from the lip formation.
- Assignee:
- NL Industries, Inc.
- Patent Number(s):
- US 4538690
- OSTI ID:
- 5893755
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CARBON
CONFIGURATION
CONICAL CONFIGURATION
CRYSTALS
DESIGN
DIAMONDS
DRAG
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
INCIDENCE ANGLE
MINERALS
NONMETALS
POLYCRYSTALS
ROCK DRILLING
WELL DRILLING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CARBON
CONFIGURATION
CONICAL CONFIGURATION
CRYSTALS
DESIGN
DIAMONDS
DRAG
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
EQUIPMENT
INCIDENCE ANGLE
MINERALS
NONMETALS
POLYCRYSTALS
ROCK DRILLING
WELL DRILLING