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
Firewall-tolerant voice-over-internet-protocol (VoIP) emulating SSL or HTTP sessions embedding voice data in cookies
Mechanism for visible users and groups
Use of tris(hydroxymethyl) aminomethane for the stabilization of peptides, polypeptides and proteins
Hand-held optical probe based imaging system with 3D tracking facilities
System and method for monitoring network activity
Fuser member
Reliable and accurate usage detection of a software application
  Randomly Featured Patents
Mother panel and method of manufacturing display panel using the same
Surrogate document indicator and methods of using same
Intermediates for 1,3-disubstituted piperidine compounds as neuroleptic agents
Stereoscopic television system and apparatus with 4 to 1 interlace display
Telephone set
Program server for interactive television system
Device for securing a leg or leg cover on ski boots
Pulse compressing apparatus for a radar system using a long pulse
Semiconductor device including transistor with composite gate structure and transistor with single gate structure, and method for manufacturing the same
Optical connector