Well logging methods and apparatus
CA 1051518 A · Owner: Schlumberger Canada Limited · Inventors: Vieiro, Julio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pad mounted electrode tool is utilized to provide a mudcake detection technique which can determine the presence of mudcake and distinguish between mudcake and shale formations. This is accomplished by detecting the main and auxiliary currents of the tool and producing therefrom two parameters. The parameters then provide an indication of the presence or absence of mudcake and hence the location of permeable zones in the formation.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.