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
Dispensing of restricted goods
Soybean variety XB51J12
Systems and methods for velocity profile based approach to point control
Fractal method for detecting and filling data gaps within LiDAR data
Communication system
Floribunda rose plant named `KORamflusa`
Method for preventing wheat from mycotoxin contamination
  Randomly Featured Patents
Dual cores for golf balls
Process for preparing phthalides
Vinyl alcohol copolymers and water-soluble films containing them
Digital camera
Display device and a method of manufacturing the display device
Flexible circuit film and display panel assembly having the same
Cosmetic stick compositions containing DI--and triblock copolymers
Radio apparatus and antenna adapted for contactless communication
Pipe repair device
Arthrodesis guide for angularly positioning joint bones