Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device
CA 2476575 C · Owner: Khazanovich, Irina · Inventors: Khazanovich, Irina; Kwasniewski, Nathan; Khazanovich, Abram
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wellhead assembly and method for providing power connection to downhole electrical , device. Wellhead body members support isolated tubing hanger and grounding tubing hanger. , The isolated tubing hanger suspends a conducting tubing string while the , grounding tubing , hanger suspends a grounding tubing string concentrically spaced from the conducting tubing , string. The isolated tubing hanger has an outer housing an inner electrically , conducting portion supported by the outer housing to provide electrical connection with and to suspend the , conducting tubing string and insulation between the outer housing and the conducting portion to , electrically isolate the outer housing. …
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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 August 5, 2004 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2026.
- 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.