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
Method and apparatus of motion vector prediction with extended motion vector predictor
Virtual links in a routed ethernet mesh network
Location-based method to specify ratio frequency spectrum rights
Method of operating an electromechanical converter, a controller and a computer program product
Data portal for concurrent assessment
Method and system for phase-sensitive magnetic resonance imaging
Control method and allocation structure for flash memory device
  Randomly Featured Patents
Apparatus for molding a recorded disc
Ultrasound imaging system
Pesticidal carbimidocarbonylphenylformamidines
Drag anchor
Apparatus and method for treating a substrate with UV radiation using primary and secondary reflectors
Method of controlling statuses of wafers
Sorption sheet for sorbing a plurality of discrete samples and method of producing such a sorption sheet and use thereof
Compact carbonated beverage making system
Semiconductor device having a plurality of kinds of wells and manufacturing method thereof
Apparatus and method for optically mapping front and back surface topographies of an object