Patent Number: 6,637,527

Title: Cutting structure for roller cone drill bits

Abstract: The invention relates to a roller cone drill bit for drilling earthformations. The drill bit includes a bit body and a plurality of rollercones attached to the bit body and able to rotate with respect to the bitbody. Each roller cone of the bit includes a truncated apex and a sidesurface. The drill bit further includes a plurality of cutting elementsdisposed on the side surface of each cone. The cutting elements on atleast one cone are arranged such that at least one cutting element on thatcone extends past an axis of rotation of the bit body as the bit isrotated. In one embodiment, the drill bit includes three cones and thecutting elements are arranged on the cones so that cutting elements onadjacent cones intermesh between the cones.

Inventors: Singh; Amardeep (Houston, TX), Huang; Sujian (The Woodlands, TX)


International Classification: E21B 10/46 (20060101); E21B 10/16 (20060101); E21B 10/50 (20060101); E21B 10/52 (20060101); E21B 10/08 (20060101); E21B 010/00 ()

Expiration Date: 10/22015