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
Method for producing lactamates by way of thin film evaporation
Drug comprising as the active ingredient proliferative vector containing survivin promoter
Vehicle and communication monitoring
Inductive signal transfer system for computing devices
Apparatus, electronic component and method for generating reference voltage
Method and apparatus for automatically controlling gas pressure for a plasma cutter
Communication apparatus, communication method, and communication system
  Randomly Featured Patents
Semiconductor device and method for fabrication thereof
Radio base stations, mobile radio terminals, methods for controlling a radio base station, and methods for controlling a mobile radio terminal
Force-developing device for cutting forceps
Plant growing apparatus
System for testing flow meters
Method and apparatus for controlling the speed of an engine within a hybrid electric vehicle
Position detecting apparatus, position detecting method, and image forming apparatus
Purification of metal hydrocarbon
Universal hoist adaptor
Double-sided power and data center housing