Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for forming a window in a subsurface well conduit










Image Number 4 for United States Patent #5484021.

A method and apparatus for forming a window in well casing. First, using coiled tubing, a two stage whipstock is set in the well casing through the production tubing. Next, a jointed milling assembly is inserted through the production tubing, also using the coiled tubing. The travel of the mill is guided by the two stage guide surface of the whipstock, and the joint in the milling tool allows the direction of the mill to change. Thus, the mill impinges on the well casing at a relatively acute angle to the longitudinal axis of the casing reducing the likelihood that the mill will bite into the guide surface of the whipstock instead of the well casing.








 
 
  Recently Added Patents
Housing for gas flow indicator
Management of computer-file sharing between at least two devices
Satellite mounting poles
Wireless communication method, wireless communication system, and mode switching method
Pulsed plasma with low wafer temperature for ultra thin layer etches
Dynamic lookup service in a distributed system
Preservation of liquid foods
  Randomly Featured Patents
Microscope stage
Prosthetic mesh patch for hernia repair
Partially transparent eyeshield
Method and apparatus for processing bed material in fluidized bed reactors
Communications system input-output converter
Removable cover for wire wrap connectors
Information recording medium
Device for relaxing the skeletal muscle system, in particular for the neck and lumbar vertebrae
Voltage selection circuitry
Method for forming a dielectric film and method for fabricating a capacitor using the same