Indeed NASA is planning to stop the Yellowstone supervolcano from erupting by DRILLING INTO IT to release heat from it.
They tried something similar in Indonesia. An oil exploration well . All they got was boiling mud shooting out, and AFAIK it's still spewing. http://www.huffingtonpost.com/2013/07/22/mud-eruption-indonesia-disaster-drilling-quake_n_3634361.html