ANCHORAGE, Alaska (AP) — Shell Alaska has dropped plans to drill at least one exploratory well in the Beaufort Sea in in 2011.Royal Dutch Shell PLC Shell Chief Executive Peter Voser announced the decision during a question and answer session Thursday.Shell Alaska has planned a press conference for 11:30 a.m. in Anchorage.Shell in October said it would scale back its Arctic Ocean exploration plans in 2011 to promising sites in the Beaufort Sea, backing off prospects in the Chukchi Sea until legal questions were cleared.Shell had hoped to drill exploration wells in the both areas this year were put on hold by Interior Secretary Ken Salazar after the Deepwater Horizon disaster in the Gulf of Mexico. Salazar suspended applications for permits and has announced no timetable for lifting the suspension.