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
Semiconductor device including a clock generating circuit for generating an internal signal having a coarse delay line, a fine delay line and a selector circuit
Method for preparing an organic film at the surface of solid support under non-electrochemical conditions, solid support thus obtained and preparation kit
Semiconductor device with hetero-junction bodies
Methods and apparatus for ultrasonic cleaning
Knee guard
Combined imaging and radiation therapy
Inter-cell power control in the presence of fractional frequency reuse
  Randomly Featured Patents
Integrated circuit carrier
Pneumatic launcher for a toy projectile and the like
Machine and method for machining workpieces of wood, plastic material or the like
Multiple resonator dielectric filter
Vacuum cleaner with snap-fit handle and torque-reducing support
Fuel supplying system of outboard motor
Sole for footwear
Ballistics pressure transducer
Microprocessor circuit arrangement with watchdog circuit
Impact resistant blends of thermoplastic polyamides, polyolefins and elastomers