B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200; Flight Crew Total 13000; Flight Crew Type 5800
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Regained Aircraft Control
Procedure; Environment - Non Weather Related
Initially slopped R1 on track at coast out.  Hit moderate wake from aircraft at FL320 so slopped R2.  The wind then shifted and we felt it better to go back to R1 to avoid the drifting contrail.  Then encountered severe wake from the aircraft at FL320 13 miles in front of us.  The autopilot was initially on but did not respond well with the encounter as we climbed 200 feet and rolled past 30 degrees bank.  I manually took over the aircraft as the autopilot did not respond and I immediately was able to level the aircraft and roll out of the bank.  As the winds were blowing the contrails into the 'slop' area we elected to fly the NAT with no slop.  Oceanic quickly SELCALed the aircraft asking our altitude. Captain stated we were now level at FL310 and further explained the situation and that we did not fly off our altitude but were rather pushed there from the severe wake encounter.  Oceanic told us it was a B747 at FL320.
B767 First Officer reported wake encounter in trail of a B747 in oceanic airspace at FL320 that resulted in a 30 degree roll and a 200-foot climb.