Resources Contact Us Home
Anti-tracking spear points for earth-boring drill bits

Image Number 6 for United States Patent #8579051.

Described herein are roller cone drill bits and modified roller cones for use in drilling subterranean earth formations, and more specifically roller cone drill bits and roller cones having optimized spear point designs and blade orientations on at least one of the roller cones for reduced tracking and/or increased drilling performance during bit use. The roller cone drill bits include a bit body with a longitudinal axis, one or more bit legs depending from the body, and at least one roller cone attached to each of the bit legs and able to rotate with respect to the bit body, wherein at least one of the roller cones includes a spear point at the cone apex having two or more cutting blades, the cutting blades being oriented at a variety of non-equal, asymmetric angles about a central cone axis with respect to each other, such that tracking during drilling using the drill bit is minimized or eliminated.

  Recently Added Patents
System and method for calibrating display device using transfer functions
Toilet bowl
System and method for monitoring network activity
Software self-checking systems and methods
Nitride semiconductor laser device
Pattern identification apparatus, control method and program thereof
  Randomly Featured Patents
Primary bioassay of human tumor stem cells
Overhead obstruction detector for a vehicle
Film carriage mechanism and method of moving a film lamina
Methods and systems for undercolor reduction
Kinetic energy utilization system for use with vehicles with internal combustion engine
Method of managing one-time pad data and device implementing this method
Intrabody introduced device and medical device
Coloring composition
Identification tags
Hot fill container and closure and associated method