Drilling system, and method for enlarging a borehole

摘要

Drilling system, and.Method for enlarging a borehole with a drilling system which includes a tube comprising a first end and a second end; a drill bit with a first end of the tube.Umfuro adapted for piercing in a formation; a rotator tube along a second end of the tube.Adapted to rotate with the tube; and a pump connected to the pipe between the first end and the second end.The pump is adapted to convey a fluid from the first end of the tube to the second end of the tube.The pump comprising a first portion adapted to rotate with the tube and a second portion adapted to remain stationary in relation to the tube.