Method and apparatus for producing and drilling a well
CA 2123075 C · Owner: Matthews, Cameron M. · Inventors: Matthews, Cameron M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed at a method and apparatus for producing liquids, namely hydrocarbons from a subterranean, formation using a well having a collecting wellbore located at least partially within the formation. The apparatus is comprised of: a first downward wellbore having a proximal end communicating with the surface and a distal end extending beneath the surface; a second downward wellbore having a proximal end communicating with the surface and a distal end extending beneath the surface; a collecting wellbore for collecting liquids from the formation, located at least partially within the formation and communicating with the formation and the downward wellbores such that a …
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 May 6, 1994 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2016.
- 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.