Resources Contact Us Home
Single cone rock bit having inserts adapted to maintain hole gage during drilling

Image Number 7 for United States Patent #7690446.

A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string. A bearing journal depends from the bit body. A single roller cone is rotatably attached to the bearing journal. The roller cone has a plurality of inserts disposed at selected positions about the cone. The journal defines a rotation angle with respect to an axis of rotation of the bit such that the roller cone includes a wall contact zone and a bottom contact zone. At least one of the inserts disposed in the wall contact zone has an extension portion terminating in a substantially planar upper surface.

  Recently Added Patents
Liquid-level sensor
LED drive circuit
Method for encoding signal, and method for decoding signal
Veronica plant named `Amethyst Plume`
Method and system for remapping processing elements in a pipeline of a graphics processing unit
Power or voltage oscillation damping in a power transmission system
Reducing voltage stress in a flyback converter design
  Randomly Featured Patents
Container and method of making a container with integral bottom panel and side panels
Light guide member, illumination apparatus, and image capturing apparatus using the same
Apparatus and method of parallel processing an MPEG-4 data stream
Ambulatory aid
Scheduler for a direct memory access device having multiple channels
Virtual reality generator for displaying abstract information
Method for supplying vacuum evaporation material
Vibration suppression and electromechanical damping apparatus for electrophotographic printing structures
Video based system and method for detecting and counting persons traversing an area being monitored
Gradient-free illumination of passive readout display devices