Section 24-24-10

I and my two siblings have been notified that drilling activity has begun. It was homesteaded by our grandparents. We sold it nine years ago with 20 year mineral rights. is that from sale date of property or from day of drilling activity? Any info from you will be appreciated. We are so excited, for over 70 years we have always heard some day there will be a well in this are. Little did we know. Owner has lease with Chesapeake Energy. Thanking you in advance for any info! : )