Method for producing the flank of a self-penetrating tool for drilling a well in a rock, wherein the tool flank comprises N blades (2a, 2b, 2c, 2d) numbered from 1 to N in the opposite direction to the direction of rotation of the tool, wound spirally around the rotational axis of the bit according to a pitch δhel, that is constant for all the blades, and inclined relative thereto; the portion of the blade the closest to the tip (la) of the tool also being the closest to the axis thereof, each blade comprising K bits (3a, 3b, 3c, 3d), numbered from 1 to K, the first bit being the closest to the axis and to the tip (la) of the tool, each bit being referenced by an index T(n,k), where n is the number of the blade and k is the number of the bit on said blade; each bit comprising a rake face, a clearance plane and a side clearance plane oriented relative to one another in twos at an angle that lies in the range 80° to 120°, each bit being in contact with the rock via a point of contact (3b3) at the intersection of the rake face, the clearance plane and the side clearance plane, said point of contact (3b3) being situated in a meridian plane relative to the rotational axis of the tool, the bit being inclined at an angle βi relative to the rotational axis, which angle is measured relative to an axis Zi, in the meridian plane, of a trihedron Xi, Yi, Zi, the origin whereof being the point of contact, such that said inclination βi prevents ploughing of the clearance plane, the cutting edge (3b2) of each bit, being the intersection between the rake face and the clearance plane, extending from the point of contact at a clearance angle ωd, that lies in the range 0° to 10° relative to the plane Xi, Yi of the trihedron, where the axis Yi is parallel to the displacement of the point of contact of the tool in the material, Xi being perpendicular to Yi and Zi, the normal (Ni) to the rake face being oriented at a rake angle ωc relative to the plane Xi, Yi and a lateral angle ωs form the axis Yi with the projection of the normal (Ni) to the rake face in the plane X1, Yi, the bits cutting an elementary groove (73, 51a..j, 60i, 60j) in the rock, the method comprising the steps of: - defining the feed per revolution δcin of the tool, - distributing the bits over the blades such that each bit T(n,k) cuts an elementary groove that is adjacent to and upstream of the groove cut by the bit T(n-1, k) according to a cutting front oriented at an angle (π / 2 - βcin) relative to the rotational axis of the tool at the feed δcin, where βcin being greater than or equal to 50°; - defining the rake angle ωc, lying in the range 0° to 40° and the lateral angle ωs, lying in the range 30° to 80°, such that the normal to the rake face comprises a component that is directed upstream d on the rotational axis of the tool; - making the corresponding bit. - defining the feed per revolution δcin of the tool, - distributing the bits over the blades such that each bit T(n,k) cuts an elementary groove that is adjacent to and upstream of the groove cut by the bit T(n-1, k) according to a cutting front oriented at an angle (π / 2 - βcin) relative to the rotational axis of the tool at the feed δcin, where βcin being greater than or equal to 50°; - defining the rake angle ωc, lying in the range 0° to 40° and the lateral angle ωs, lying in the range 30° to 80°, such that the normal to the rake face comprises a component that is directed upstream d on the rotational axis of the tool; - making the corresponding bit.