Method and device for making geophysical measurements within a wellbore
CA 1213969 A · Owner: Societe Nationale Elf Aquitaine · Inventors: Staron, Philippe; Gros, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for making geophysical measurements in a wellbore. A measuring string which preferably comprises a plurality of measuring tools displaced along a borehole wall is connected to a surface control unit by means of a traction system consisting of a cable, guide pulley, connection head and junction box. The measuring tools are displaced at a relative velocity which is equal and opposite to the absolute velocity of the traction system in order to reduce the absolute velocity of the measuring tools to zero during measurement periods. The relative velocity of the tools is in the same direction as the absolute velocity of the traction system between measurement periods, with the …
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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 November 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2003.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.