US Patent:
20100089576, Apr 15, 2010
Inventors:
THOMAS W. WIDEMAN - MILTON MA, US
JARED M. POTTER - REDWOOD CITY CA, US
DONALD S. DREESEN - LOS ALAMOS NM, US
ROBERT M. POTTER - RIO RANCHO NM, US
Assignee:
Potter Drilling, Inc. - Redwood City CA
International Classification:
E21B 43/241
E21B 7/14
Abstract:
Methods and apparatus for spalling a geological formation, for example to thermally drill a wellhole, are provided. Such methods may include providing a housing comprising a reaction chamber and a catalyst element held within the reaction chamber, providing at least one jet nozzle, contacting one or more unreacted fluids or solids with the catalyst element, wherein the unreacted fluid or solid is adapted to react over the catalyst element, thus generating a reacted fluid, and emitting the reacted fluid through the at least one nozzle, wherein the at least one nozzle is directed to an excavation site within or on the geological rock formation, thereby creating spalls and/or a reacted rock region.