Resources Contact Us Home
Pilot casing mill

Image Number 2 for United States Patent #5027914.

A pilot casing mill for removing unwanted pipe from a well bore, which includes a cylindrical pilot having helical vanes and adapted for mounting on one end of a cylindrical mill body. The mill body is provided with longitudinal slots which receive outwardly-extending blades fitted with multiple cutting elements for engaging and cutting the pipe when the pilot casing mill is mounted on the end of a rotatable drill string and inserted in the well. In a preferred embodiment of the invention the blades are removably secured in the slots by removable wedge blocks and may be longitudinally adjusted in place to align adjacent rows of cutting elements, by operation of multiple adjusting screws seated against an adjusting screw ring mounted in a circumferential slot provided in the mill body.

  Recently Added Patents
Sealed, waterproof digital electronic camera system and method of fabricating same
Air-fuel ratio control apparatus for an internal combustion engine
Integrated circuit testing with power collapsed
System and method for order placement in an electronic trading environment
Passive charge cord release system for an electric vehicle
Method for isomerisation of hop alpha-acids using heterogeneous alkaline earth metal based catalysts
  Randomly Featured Patents
Key switch device
Apparatus and method for providing a read signal for an information processing device
System for assisting regeneration of a storage/release NOx trap for a motor vehicle diesel engine
Bag placer magazine
Automatic guidance system for moving objects
Storage device for the delivery and pickup of goods
Process for preparing acyl-CoA synthetase LCF-18
Thermal generator with parallel circuits
Thermal actuation device
Slurry hydrocarbon synthesis with external hydroisomerization in downcomer reactor loop