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
Crosslinked core/shell polymer particles
Method for transmitting a signal from a transmitter to a receiver in a power line communication network, transmitter, receiver, power line communication modem and power line communication syst
Treatment of celiac disease with IgA
Organic light-emitting display with black matrix
Power supply architecture system designer
Electronic devices with voice command and contextual data processing capabilities
Systems and methods for a signed magnitude adder in one's complement logic
  Randomly Featured Patents
Flow distributor for fluid circuit and its application to shuttleless looms with pneumatic insertion of the weft
Method and system for access to electronic version of a physical work based on user ownership of the physical work
Detection apparatus
Method of cold coining a toothed segment for an endless track wheel and two-piece die therefor and article formed thereby
Ladder leveling attachment
Protection device for a superconducting magnetic coil assembly
Attenuation of an electrostatic charge on a cable prior to coupling the cable with an electronic system
Housing for an electrical connector
Door closing silencer
Accessory attachment protocol and responsive actions