Resources Contact Us Home
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
Process for filtering interferograms obtained from SAR images acquired on the same area
Silicon-on-insulator (SOI) structure configured for reduced harmonics and method of forming the structure
Scanning transmission electron microscope and axial adjustment method thereof
Method for olympic event hospitality program management
Specimen preparation device, and control method in specimen preparation device
Undercabinet plug-in mount
Storage system with LU-setting function
  Randomly Featured Patents
Optically active glass and optical fiber with reduced photodarkening and method for reducing photodarkening
Slide decelerator for a firearm
Heater cable installation
Implantable medical device system with sensor for hemodynamic stability and method of use
Method and apparatus for knowledge discovery in databases
Water resistant nacreous pigment and process for producing the same
Electrophoretic display device
Cache management
Interlocking roofing panel system
Laser characterization system and process