Expander for expanding a tubular element
CA 2559006 C · Owner: Campo, Donald Bruce · Inventors: Campo, Donald Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for expanding a wellbore tubular such as a casing is provided. The apparatus includes: an expandable casing (101); a drill string (406); an expansion cone suspended from the drillstring the expansion cone , having an expanded state and a collapsed state and wherein the expansion cone (204) is deformable to the expanded state; a seal bushing (402) capable of sealing an annulus between the drill string and the expandable casing; a downward expansion flow path wherein fluid communication is provided between the inside of the drill string and the annulus between the drill string and the expandable casing above the expansion cone; and an upward expansion flow path …
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 March 8, 2005 and granted November 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.