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

Image Number 4 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
LED light source lamp having drive circuit arranged in outer periphery of LED light source
Method for designing sunlight-reflection and heat-radiation multilayer film
Method for manufacturing non-volatile memory device, non-volatile memory element, and non-volatile memory device
User control of replacement television advertisements inserted by a smart television
Detection of procedural deficiency across multiple business applications
Driving apparatus having an optical sensor and a thermal sensor for thermal and aging compensation of backlight module and driving method of backlight module
  Randomly Featured Patents
Insertion of multithreaded execution synchronization points in a software program
Ultrasonic fingerprint scanning utilizing a plane wave
Sinusoidal grooving pattern for grooved journal bearing
Graphical user interface
Duplex mixer exhaust nozzle
Method of and apparatus for manufacturing tube having holes
Flow regulator for water pump
Baitcasting reel
Blister package for a reel
Methods of treating cancer