Advanced Low-Stress Bonding of Thermally Stable Polycrystalline Diamond Cutters to Tungsten Carbide Substrates

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$749,968.00
Award Year:
1997
Program:
SBIR
Phase:
Phase II
Contract:
DE-FG02-96ER82272
Agency Tracking Number:
34558
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Science Research Laboratory
15 Ward Street, Somerville, MA, 02143
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Mr. H. Tracy Hall Jr.
Senior Research Scientist
(617) 547-1122
Business Contact:
Dr. Jonah Jacob
President
(617) 547-1122
Research Institution:
n/a
Abstract
40144 Science Research Laboratory This project will develop a thermally stable polycrystalline diamond cutter than can withstand the higher impact forces and higher cutting temperatures encountered in drilling harder formations with shear bits. A high energy electron beam (HEEB) will be used to braze polycrystalline diamond films to tungsten carbide-cobalt surfaces. This technique is expected to minimize degradation of the two surfaces and eliminate stresses caused by the mismatch in the coefficients of thermal expansion. Phase I will develop the HEEB brazing system, perform preliminary experiments to demonstrate low-stress joining, and determine joint properties. Phase II will be concerned with process optimization, fabrication of sufficient quantities of cutters for laboratory and field use, and qualification of the cutter by bit manufacturers . Anticipated Results/Potential Commercial Applications as described by the awardee: Application of this technology will allow the use of shear bits in harder formations than hitherto possible. The advanced cutter technology will also be applied to production of advanced diamond bearings for mud motors and gauge protectors for stabilizers and roller-cone bits.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government