Richard Wayne Lyon
Nursing at Columbine St, Denver, CO
License number
Colorado 93726
Issued Date
Sep 1, 1990
Renew Date
Oct 1, 2015
Expiration Date
Sep 30, 2017
Type
Registered Nurse
Address
Address
2301 S Columbine St, Denver, CO 80210
Professional information
Rock Bit Borhole Back Reaming Method
US Patent:
5415243, May 16, 1995
Filed:
Jan 24, 1994
Appl. No.:
8/185643
Inventors:
Richard C. Lyon - Denver CO
William M. Conn - Ponca City OK
William M. Conn - Ponca City OK
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 1016, E21B 1052
US Classification:
175331
Abstract:
A method to back ream a borehole drilled with a roller cone drill bit is taught. Protruding hard metal cutting inserts are affixed on the upper outside diameter tapered shoulder of each of the bit legs. If the borehole closes to a smaller diameter than the bit gage diameter or loose rock rubble packs around the upper portion of the bit, the protruding cutting inserts fixed on the upper leg tapered shoulder portion back ream the borehole by lifting and rotating the bit.