How long will it take to drill through the crust?

Currently we cannot drill to the center of the Earth because no drill could withstand the temperatures in Earth's interior. The deepest hole ever drilled reached a depth of 12,262 meters (40,230 ft) or about 7.6 miles before it stopped working properly due to the heat. Earth has a radius of nearly 4,000 miles. Even if we had a drill that could withstand the temperatures of Earth's core, the outer core is liquid and features active convection currents.