Roller cone bit

A roller cone bit, comprising:

• a body having concave sides, an upper portion, and a lower portion;
• legs are integrally attached to the body, and roller cones are rotatably engaged to the legs;
• the concave sides are positioned around an exterior of the body, the concave sides extend from the upper portion of the body to the lower portion of the body, and the concave sides form gaps in the exterior of the body to provide passage of drill cuttings past the body;
• and,
• at least one of the concave sides is positioned between a pair of the legs.

A method of drilling into a rock or earth formation, comprising:

• providing a roller cone bit, comprising:
• a body having concave sides;
• legs integrally attached to the body;
• roller cones rotatably engaged to the legs;
• the concave sides positioned adjacent the legs;
• and, a nozzle, comprising an extending portion and an opening;
• wherein the nozzle is positioned in an approximately central portion of the body;
• wherein the opening is positioned a distance from a surface of the body;
• connecting the roller cone bit to a drill string;
• rotating the roller cone bit;
• directing fluid to the nozzle;
• and,
• flushing drill cuttings with the fluid past the concave sides.

A roller cone bit, comprising:

• a body having concave sides;
• legs integrally attached to the body;
• roller cones rotatably engaged to the legs;
• the concave sides positioned adjacent the legs to provide flushing of drill cuttings from a borehole;
• and,
• a nozzle to spray a drilling fluid, comprising an extending portion and an opening;
• wherein the nozzle is positioned in an approximately central portion of the body;
• and, wherein the opening is positioned a distance from a surface of the body.

A roller cone bit to drill into earth or rock, comprising:

• a body, the body including an upper portion and a lower portion, the upper portion including a threaded connection portion to connect with a drill string to rotate the roller cone bit;
• three legs engaged to a perimeter of the body, each of the legs having an end at the lower portion of the body;
• a roller cone rotatably engaged to the ends of each of the legs via a bearing system, wherein each of roller cones includes an inner cutter, a center cutter, and an outer cutter;
• the body having three concave sides extending from the upper portion to the lower portion, the concave sides positioned between the legs, the concave sides forming gaps to flush drill cuttings;
• and,
• a nozzle extending from the lower portion of the body to spray a drilling fluid;
• the nozzle comprising an extending portion and an opening;
• wherein the nozzle is positioned in an approximately central portion of the lower portion of the body;
• wherein the nozzle extends to a point approximately clearing the center cutter of the roller cone bit;
• and, wherein the nozzle is in fluidic communication with a fluid line or an interior of the body.