As of June 2005 , the Houston , Texas-based company Presco was seeking to drill for natural gas within the buffer zone , putting Placing in as many as four wells .

The company had initially received Receiving approval to drill one well , but the county dropped Motion_directional its support when more extensive plans were revealed Reveal_secret .

After the state-owned mining company , Codelco , took over Getting rescue efforts from the mine 's owners , exploratory boreholes were drilled Action , and seventeen days after the accident Catastrophe a note was found Know taped to a drill bit pulled Motion back to the surface : ( `` We are well in the shelter , the 33 of us '' ) .