US Patent 11332997 Downhole drill-inject and plug tool

An apparatus includes a drill bit having a frangible drive shaft, a thread cutting surface formed on an outer surface of the drill bit, a conical swage formed on the drill bit, the conical swage having a conical shape, and a seal plug coupled to the drill bit, the seal plug removable from the drill bit. A method includes penetrating an inner surface and an outer surface of the casing with a drill point of the drill bit thereby forming a hole, threadingly engaging the seal plug with the hole wall, disengaging the seal plug from a drive shaft of the drill bit assembly, retracting the drill bit assembly through the seal plug, and engaging an outer surface of a conical swage with an inner surface of the seal plug and radially expanding the seal plug as the conical swage is retracted through the hole wall, thereby sealing the hole.