U.S. Secretary of State Hillary Rodham Clinton arrived in earthquake- ravaged Chile this morning to offer the devastated country moral and material support as it recovers from the deadly disaster.  "We brought some satellite phones," Clinton told Chilean President Michelle Bachelet in a picture-taking session.  "That was the one thing we could get on the plane right away."  Clinton flew into the capital of Santiago, delivering much-needed satellite communication equipment and a technician.  It's a first installment of what she says will be substantial U.S. relief assistance.  State Department spokesman P.J. Crowley said in Washington Monday that Chile has also asked for a field hospital and water purification systems.  Other details of U.S. aid are to be worked out during Clinton's visit.  U.S. officials said Chile would not have to repay any U.S. assistance.  Little destruction was visible from the air as Clinton's plane descended.  At the airport itself, pallets of various types of assistance were stacked in front of some hangars, and one military transport plane landed shortly after Clinton's U.S. Air Force jet.  Chi le's neighbors have already acted.  Argentina on Monday flew in an Air Force C-130 with much of a hospital — including a surgical and intensive care unit, ambulance and laboratory — three water treatment plants and power generation units, the military announced.  Five other planeloads of aid were supposed to arrive by tonight.  Brazil's President Luiz Inacio Lula da Silva visited Chile Monday.  He said a first planeload of aid would arrive today, followed later by a full army field hospital.  Peru, too, said it was sending in a hospital and doctors with 15 tons of blankets and tents.  Before the weekend quake struck, Clinton had planned a longer stay in Chile, but she will now only spend a few hours there before heading to Brazil.  Clinton is in the midst of a weeklong, six-nation tour of Latin America that has taken her already to Uruguay and Argentina.  Her Santiago visit was expected to be confined to the airport and its immediate vicinity.  At the airport, she met with Bachelet, the outgoing president, and President-elect Sebastian Pinera.