Method of creating a borehole in an earth formation
CA 2523348 C · Owner: Filippov, Andrei Gregory · Inventors: Filippov, Andrei Gregory; Benzie, Scott Anthony; Schilte, Paul Dirk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of creating a borehole in an earth formation is provided. The method comprises the steps of drilling a section of the borehole and lowering an expandable tubular element into the borehole whereby a lower portion of the tubular element extends into the drilled borehole section radially expanding , said lower portion of the tubular element so as to form a casing in the drilled borehole section, and separating an upper portion of the tubular element from said lower portion so as to allow the separated upper portion to be moved relative to said lower portion.
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
- Filed April 16, 2004 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 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
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.