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Composite drill pipe and method for forming same

United States Patent

April 15, 2014
View the Complete Patent at the US Patent & Trademark Office
Metal inner and outer fittings configured, the inner fitting configured proximally with an external flange and projecting distally to form a cylindrical barrel and stepped down-in-diameter to form an abutment shoulder and then projecting further distally to form a radially inwardly angled and distally extending tapered inner sleeve. An outer sleeve defining a torque tube is configured with a cylindrical collar to fit over the barrel and is formed to be stepped up in diameter in alignment with the first abutment shoulder to then project distally forming a radially outwardly tapered and distally extending bonding surface to cooperate with the inner sleeve to cooperate with the inner sleeve in forming a annular diverging bonding cavity to receive the extremity of a composite pipe to abut against the abutment shoulders and to be bonded to the respective bonding surfaces by a bond.
Leslie; James C. (Fountain Valley, CA), Leslie, II; James C. (Mission Viejo, CA), Heard; James (Huntington Beach, CA), Truong; Liem (Anaheim, CA), Josephson; Marvin (Huntington Beach, CA)
Advanced Composite Products & Technology, Inc. (Huntington Beach, CA)
13/ 551,446
July 17, 2012
STATEMENT OF GOVERNMENT INTEREST This invention was partly funded by the Government of the United States of America under Cooperative Agreement No. DE-FC26-99FT40262 awarded by the U.S. Department of Energy and the Government of the United States of America has certain rights in the invention.