Ask Russia. Evidently they have done it numerous times.
Russia used nukes to accomplish it too. Nuke the Gulf of Mexico? We can’t even get the people of this contry to support safe nuclear power. I believe Russia failed once when they tried to control a well using this method. The ramifications of the well not sealing using a nuclear device would be huge. Now the oil is flowing through radioactive rock. It could also create a situation where pumping mud from the relief well to control the blowout through hydrostatic pressure may not work. Think about that.
If the top kill method does not work in a couple of days then the next best option is the relief well. That always work.
BP knows what they are doing. They have experts that know far more than you and I working on a very complex problem. Just because it takes time to create a solution does not mean it is the end of the world.