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
High pressure refolding of protein aggregates and inclusion bodies
Imaging device
Automobile body
Device, information processing method, and computer-readable storage medium
Produce container and lid assembly
Display stand for a mobile tablet computer
Illumination unit for a direct-view display
  Randomly Featured Patents
Cylinder head assembly comprising a holder for the attachments of units
Process for the co-production of aliphatic diols and cyclic ethers
Can
Muffler support device
Incineration of waste organic aerosols
Electrochemical energy storage device with high capacity and high power using conductive polymer composite
Electromagnetic control device for cameras
Multiplexer including addition element
16.beta.-Methyl steroid process
Finishing trowel