Copiapo , Chile ( CNN ) -- A large oil drilling platform arrived Thursday at the Chilean mine where 33 trapped miners are awaiting rescue . The oil platform is part of Plan C , the third operation to drill to reach the miners . Chilean mining officials have said they believe that drill will dig faster than the other drills currently at work . But they cautioned that the miners , trapped since August 5 , still may not be rescued until December . `` This was the most beautiful morning of my life , '' said Elizabet Segovia , the sister of one trapped miner . `` It 's hope for the boys . Let them build it and get it working quickly . '' Progress on the other two rescue operations was mixed , said Andre Sougarret , an engineer overseeing the drilling . The drill being used in Plan A -- a type usually used in mining operations -- reached a depth of 171 meters ( 187 yards ) Thursday , 40 more meters ( about 44 yards ) since an update given by officials Wednesday . The Plan B drill , usually used to drill water bore holes , hit a snag at 268 meters ( 293 yards ) , Sougarret said , when it struck a reinforcement beam used in the mine 's operations . The men have been trapped for 36 days now , 2,300 feet under the earth . When rescuers first found them , the miners told officials they had survived for more than 17 days by sharing a jar of peaches and small amounts of tuna and mackerel that were in their shelter . Officials were weighing how to best proceed after the problem with the Plan B drill , but said the drill bit would have to be retrieved and replaced . `` It was totally destroyed , '' Sougarret explained . The Plan B device -- which had been drilling for less time than Plan A 's drill , and had already surpassed its distance -- also had a problem Wednesday with a cable malfunction . The drill is widening a hole already drilled into the mine . Sougarret said that once it begins drilling again , it could reach its target -- a workshop used by the miners -- within several days . Then a larger drill could be used until the hole is wide enough so that the miners can be hoisted out , one at a time , in a small cage .
NEW : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty. Plan A drill is making progress ; Plan B drill has hit a snag . 33 miners have been trapped for 35 days , 2,300 feet under the earth .