Patent ID: 9091121
Filing Date: 2015-07-28
Classification: E21B

Abstract:
1. A system for use in a subterranean wellbore comprising: an earth boring bit coupled to an end of a string of drill pipe to define a drill string; a seal assembly on a body of the earth boring bit comprising, a seal element; a flow line between an axial bore in the drill string and the seal element, and an inlet valve in the flow line that is moveable to an open configuration when a pressure in the drill string exceeds a pressure for earth boring operations, so that the seal element is in fluid communication with the annular space in the pipe string and the seal element expands radially outward into sealing engagement with a wall of the wellbore; a fracturing port between an end of the bit that is distal from the string of drill pipe and the seal: and a fracturing valve in the bit adjacent the fracturing port and that selectively changes to an open configuration when the inlet valve is in the open configuration and opens fluid communication between the annular space in the pipe string and the fracturing port.