Home   Contact Us

Industry Pioneers
Technology Pioneers
Pinnacle Award
Hall of Fame
2007 Industry Pioneers
2007 Technology Pioneers







H.L. "Duke" Zinkgraf

A prolific inventor, Duke Zinkgraf provided practical solutions to the problems of dynamic positioning (DP) of offshore rigs, including the world's first DP coring vessel, the Eureka. He was intimately involved in the design and construction of the SEDCO 445, the world's first DP vessel used to drill exploratory wells with a riser and subsea BOP. He was also actively involved in building the SEDCO 709, the world's first DP semi-submersible rig.

Working for The Baylor Company, Zinkgraf was instrumental in adapting the eddy current current brake to the drilling industry, and was the first to convert rig power from AC to DC to provide higher efficiency. He also assisted Varco with the design of the top drive system.


2011 Call for Nominations
2011 Industry Pioneer Nomination Form 
2011 Technology Pioneer Nomination Form

Media Plug-In Required

Some sections of this site use the Adobe Acrobat Reader plug-in. If you do not already have the Acrobat Reader installed, click on the "Get Acrobat Reader" Icon below to download and install.