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Title: Drill bit assembly for releasably retaining a drill bit cutter

Abstract

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.

Inventors:
 [1];  [2]
  1. (Austin, TX)
  2. (Edgewood, NM)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
874630
Patent Number(s):
6427791
Assignee:
The United States of America as represented by the United States Department (Washington, DC) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
drill; bit; assembly; releasably; retaining; cutter; provided; polycrystalline; diamond; compact; adjacent; cavities; formed; house; disc-shaped; wedge-shaped; lock; element; removable; fastener; engages; flat; surface; retain; cavity; enables; locked; axial; andor; rotational; movement; providing; easy; removal; worn; damaged; ability; adjust; replace; cutters; field; reduces; effect; wear; helps; maintains; performance; improves; drilling; efficiency; drill bit; cavities formed; /175/299/

Citation Formats

Glowka, David A., and Raymond, David W. Drill bit assembly for releasably retaining a drill bit cutter. United States: N. p., 2002. Web.
Glowka, David A., & Raymond, David W. Drill bit assembly for releasably retaining a drill bit cutter. United States.
Glowka, David A., and Raymond, David W. Tue . "Drill bit assembly for releasably retaining a drill bit cutter". United States. https://www.osti.gov/servlets/purl/874630.
@article{osti_874630,
title = {Drill bit assembly for releasably retaining a drill bit cutter},
author = {Glowka, David A. and Raymond, David W.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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