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Inductive shearing of drilling pipe

United States Patent

April 19, 2016
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Induction shearing may be used to cut a drillpipe at an undersea well. Electromagnetic rings may be built into a blow-out preventer (BOP) at the seafloor. The electromagnetic rings create a magnetic field through the drillpipe and may transfer sufficient energy to change the state of the metal drillpipe to shear the drillpipe. After shearing the drillpipe, the drillpipe may be sealed to prevent further leakage of well contents.
Ludtka; Gerard M. (Oak Ridge, TN), Wilgen; John (Oak Ridge, TN), Kisner; Roger (Farragut, TN), Mcintyre; Timothy (Farragut, TN)
13/ 844,057
March 15, 2013
The United States Government has rights in this invention pursuant to contract no. DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC. and Work for Others Agreement No. NFE-12-04104 between UT-Battelle, LLC. and Transocean Technology Innovations. LLC.