Cutting structure based hydraulics

A drill bit comprising:

• a bit body with a bit central axis, and defining a gage diameter;
• a first roller cone with a first cone shell, attached to said bit body, rotatable around a first journal axis;
• a first row of cutting elements attached to said first roller cone that includes a first cutting element, said first cutting element having a first cutting tip;
• a first cutting tip curve defined by rotating first roller cone with attached first cutting tip around said first journal axis;
• a first nozzle receptacle in said bit body;
• a first nozzle, installed in said first nozzle receptacle, that defines a first projected fluid path and that forms a first centroid at an exit location, said centroid being located greater than 25% of the distance between said central axis and gage diameter from said central axis;
• said first projected fluid path being within 0.4 inches of said first cutting tip curve;
• a second roller cone with a second cone shell, attached to said bit body, rotatable mound a second journal axis;
• a second row of cutting elements attached to said second roller cone that includes a second cutting element, said second cutting element having a second cutting tip;
• a second cutting tip curve defined by rotating second roller cone with attached second cutting tip around said second journal axis;
• a second nozzle receptacle in said bit body;
• a second nozzle, installed in said second nozzle receptacle, that defines a second projected fluid path and that forms a second centroid at an exit location, said second centroid being located greater than 25% of the distance between said central axis and gage diameter from said central axis;
• said second projected fluid path being within 0.4 inches of said second cutting tip curve;
• a lateral angle for said first projected fluid path defined with respect to a first plane, said first plane being defined by said bit body central axis, and by a first line lying parallel to said bit body central axis and intersecting said first centroid;
• a radial angle for said first projected fluid path defined with respect to a second plane, said second plane being perpendicular to said first plane and parallel to said central axis;
• a lateral angle for said second projected fluid path defined with respect to a third plane, said third plane being defined by said bit body central axis, and by a second line lying parallel to said bit body central axis and intersecting said second centroid;
• a radial angle for said second projected fluid path defined with respect to a fourth plane, said fourth plane being perpendicular to said third plane and parallel to said central axis;
• wherein the lateral and radial angles of said first projected fluid path differ from said lateral and radial angles of said second projected fluid path such that the spatial relationship between said first projected fluid path and said first cone shell differs from the spatial relationship between said second projected fluid path and said second cone shell.

A rolling cone rock bit, comprising:

• a bit body having a diameter of at least five and seven-eighth inches, with a bit central axis and defining a gage diameter;
• a first roller cone with a first cone shell, attached to said bit body, rotatable around a first journal axis;
• a first row of cutting elements attached to said first roller cone that includes a first cutting element, said first cutting element having a first cutting tip, said first row of cutting elements being a gage row that cuts to about said gage diameter;
• a first cutting tip curve defined by said first cutting tip when rotated around said first journal axis;
• a first nozzle receptacle in said bit body;
• a first nozzle, installed in said first nozzle receptacle, that defines a first projected fluid path and that forms a first centroid at an exit location;
• said first projected fluid path being within 0.3 inches of said first cutting tip curve;
• a second roller cone with a second cone shell, attached to said bit body, rotatable around a second journal axis;
• a second row of cutting elements attached to said second roller cone that includes a second cutting element, said second cutting element having a second cutting tip, said second row of cutting elements being a gage row that cuts to about said gage diameter;
• a second cutting tip curve defined by rotating second roller cone with attached second cutting tip around said second journal axis;
• a second nozzle receptacle in said bit body;
• a second nozzle, installed in said second nozzle receptacle, that defines a second projected fluid path and that forms a second centroid at an exit location;
• a third roller cone with a third cone shell, attached to said bit body, rotatable around a third journal axis;
• a third row of cutting elements attached to said third roller cone that includes a third cutting element, said third cutting element having a third cutting tip, said third row of cutting elements being a gage row that cuts to about said gage diameter;
• a third cutting tip curve defined by said third cutting tip when rotated around said third journal axis;
• a third nozzle receptacle in said bit body;
• a third nozzle, installed in said third nozzle receptacle, that defines a third projected fluid path and that forms a third centroid at an exit location;
• and
• wherein every projected fluid path within 1.0 inches of said first cutting tip curve at closest is also within 0.3 inches of said first cutting tip curve;
• wherein every projected fluid path within 1.0 inches of said second cutting tip curve at closest is also within 0.3 inches of said second cutting tip curve;
• and
• wherein every projected fluid path within 1.0 inches of said third cutting tip curve at closest is also within 0.3 inches of said third cutting tip curve.

A drill bit comprising:

• a bit body with a bit central axis, and defining a gage diameter;
• a first roller cone with a first cone shell, attached to said bit body, rotatable around a first journal axis;
• a first row of cutting elements attached to said first roller cone that includes a first cutting element, said first cutting element having a first cutting tip;
• a first cutting tip curve defined by rotating first roller cone with attached first cutting tip around said first journal axis;
• a first nozzle receptacle in said bit body;
• a first nozzle, installed in said first nozzle receptacle, that defines a first projected fluid path not parallel to said bit central axis and that forms a first centroid at an exit location, said centroid being located greater than 25% of the distance between said central axis and gage diameter from said central axis;
• said first projected fluid path being within 0.4 inches of said first cutting tip curve;
• a second roller cone with a second cone shell, attached to said bit body, rotatable around a second journal axis;
• a second row of cutting elements attached to said second roller cone that includes a second cutting element, said second cutting element having a second cutting tip;
• a second cutting tip curve defined by rotating second roller cone with attached second cutting tip around said second journal axis;
• a second nozzle receptacle in said bit body;
• a second nozzle, installed in said second nozzle receptacle, that defines a second projected fluid path not parallel to said bit central axis and that forms a second centroid at an exit location, said second centroid being located greater than 25% of the distance between said central axis and gage diameter from said central axis;
• said second projected fluid path being within 0.4 inches of said second cutting tip curve;
• a lateral angle for said first projected fluid path defined with respect to a first plane, said first plane being defined by said bit body central axis, and by a first line lying parallel to said bit body central axis and intersecting said first centroid;
• a radial angle for said first projected fluid path defined with respect to a second plane, said second plane being perpendicular to said first plane and parallel to said central axis;
• a lateral angle for said second projected fluid path defined with respect to a third plane, said third plane being defined by said bit body central axis, and by a second line lying parallel to said bit body central axis and intersecting said second centroid;
• a radial angle for said second projected fluid path defined with respect to a fourth plane, said fourth plane being perpendicular to said third plane and parallel to said central axis;
• a reference plane perpendicular to said bit central axis;
• wherein at least one is selected from the group consisting of:
• a different distance from said first exit location to said reference plane than from said second exit location to said reference plane;
• said lateral angle of said first projected fluid path differs from said lateral angle of said second projected fluid path;
• and
• the radial angle of said first projected fluid path differs from said radial angle of said second projected fluid path.