Resources Contact Us Home
Downhole tool

Image Number 4 for United States Patent #7073610.

A downhole tool for generating a longitudinal mechanical load. In one embodiment, a downhole hammer is disclosed which is activated by applying a load on the hammer and supplying pressurizing fluid to the hammer. The hammer includes a shuttle valve and piston that are moveable between first and further position, seal faces of the shuttle valve and piston being released when the valve and the piston are in their respective further positions, to allow fluid flow through the tool. When the seal is releasing, the piston impacts a remainder of the tool to generate mechanical load. The mechanical load is cyclical by repeated movements of the shuttle valve and piston.

  Recently Added Patents
Linear motor with permanent-magnetic self-holding
Light-emitting device including independently electrically addressable sections
Hydrodynamic bearing apparatus and spindle motor having the same
Fire-rated wall construction product
Replacement cartridge for a razor assembly
Memory apparatus and method for controlling erase operation of the same
  Randomly Featured Patents
Starter element for stackable inter-engaging bricks
Squeeze film damper with variable support stiffness
Method of estimating electrical cross talk in an array of imaging cells
Apparatus for generating 3D fluorescence or luminescence
Method and apparatus for performing fast handover through fast ranging in a broadband wireless communication system
Automatic observation system for microorganisms and the like
III-nitride multi-channel heterojunction interdigitated rectifier
Method for producing ink jet head
Checkweigher with independent scales
Production method of toner for electrophotography