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Drill bit assembly for releasably retaining a drill bit cutter

Patent ·
OSTI ID:874630
 [1];  [2]
  1. Austin, TX
  2. Edgewood, NM
+ Show Author Affiliations
A drill bit assembly is provided for releasably retaining a polycrystalline diamond compact drill bit cutter. Two adjacent cavities formed in a drill bit body house, respectively, the disc-shaped drill bit cutter and a wedge-shaped cutter lock element with a removable fastener. The cutter lock element engages one flat surface of the cutter to retain the cutter in its cavity. The drill bit assembly thus enables the cutter to be locked against axial and/or rotational movement while still providing for easy removal of a worn or damaged cutter. The ability to adjust and replace cutters in the field reduces the effect of wear, helps maintains performance and improves drilling efficiency.
Research Organization:
SANDIA CORP
DOE Contract Number:
AC04-94AL85000
Assignee:
The United States of America as represented by the United States Department (Washington, DC)
Patent Number(s):
US 6427791
OSTI ID:
874630
Country of Publication:
United States
Language:
English

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/175/299/
ability
adjacent
adjust
andor
assembly
axial
bit
cavities
cavities formed
cavity
compact
cutter
cutters
damaged
diamond
disc-shaped
drill
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easy
effect
efficiency
element
enables
engages
fastener
field
flat
formed
helps
house
improves
lock
locked
maintains
movement
performance
polycrystalline
provided
providing
reduces
releasably
removable
removal
replace
retain
retaining
rotational
surface
wear
wedge-shaped
worn