Induction logging sonde including a folded array apparatus having a plurality of cowound receiver coils and bucking coils
CA 2191676 C · Owner: Schlumberger Canada Limited · Inventors: Orban, Andre; Long, Timothy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new induction logging tool has a toolstring length that is shorter than the toolstring length of the induction logging tool of the prior art. The new induction logging tool includes a new induction array which appears to be folded about an axis that coincides with the transmitter of the induction array of the prior art induction logging tool. The new folded induction array including a transmitter coil located at, an end of the new folded induction array and a plurality of "cowound" receiver coils and bucking coils a further plurality of individual receiver coils and at least one further bucking coil located adjacent to and on one side of the transmitter coil of the new folded induction …
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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
- Filed November 29, 1996 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2018.
- 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
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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.