Patent ID: 6732821
Filing Date: 2004-05-11
Classification: E21B

Abstract:
A profiled element for rotary drilling equipment, having an axis of rotation, for producing a drilling hole defining a wall, the profiled element having an overall shape of revolution and an axis directed along the axis of rotation of the drilling and at least one area of abutment on the wall of the drilling hole extending in the axial direction of the profiled element and having a maximum diameter constituting the maximum diameter of the drilling equipment and a turbulence area for producing an activation of circulation of a drilling fluid in the drilling hole around the drilling equipment,wherein the profiled element further includes a deflection area, in an adjacent position between the abutment area and the turbulence area and extending in the axial direction of the profiled element, comprising an external surface, of revolution around the axis of the drilling equipment, that is inclined with respect to the axis of the drilling, with a meridian line in an axial plane that moves away from the axis of the profiled element in a direction proceeding from bottom to top in a service position of the profiled element in the drilling hole.