Edward A Duran

US Patent:

45443769, Oct 1, 1985

Filed:

Nov 29, 1984

Appl. No.:

6/676045

Inventors:

Edward L. Duran - Santa Fe NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

B24D 300

US Classification:

51293

Abstract:

An abrasive slurry particularly suited for use in drilling or machining boron carbide consists essentially of a suspension of boron carbide and/or silicon carbide grit in a carrier solution consisting essentially of a dilute solution of alkylaryl polyether alcohol in octyl alcohol. The alkylaryl polyether alcohol functions as a wetting agent which improves the capacity of the octyl alcohol for carrying the grit in suspension, yet without substantially increasing the viscosity of the carrier solution.

US Patent:

48280526, May 9, 1989

Filed:

Jun 20, 1988

Appl. No.:

7/208540

Inventors:

Edward L. Duran - Santa Fe NM
Ralph L. Lundin - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

E21B 724

US Classification:

175 55

Abstract:

Apparatus attachable to an ultrasonic drilling machine for drilling deep holes in very hard materials, such as boron carbide, is provided. The apparatus utilizes a hollow spindle attached to the output horn of the ultrasonic drilling machine. The spindle has a hollow drill bit attached at the opposite end. A housing surrounds the spindle, forming a cavity for holding slurry. In operation, slurry is provided into the housing, and into the spindle through inlets while the spindle is rotating and ultrasonically reciprocating. Slurry flows through the spindle and through the hollow drill bit to cleanse the cutting edge of the bit during a drilling operation.