Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells
CA 2120366 C · Owner: Mcnair, Robert J. · Inventors: Bangert, Daniel S.; Mcnair, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention a plurality of methods are, provided for solving important and serious problems posed by lateral (and especially multilateral) completion in a wellbore including methods for sealing the junction between a vertical and lateral (70) well. Methods are disclosed for improved juncture sealing including novel techniques for establishing pressure tight seals between a liner (88) in the lateral wellbore (70) and a liner (66) in the vertical wellbore. These methods generally relate to the installation of a liner (88) to a location between the vertical and lateral (70) wellbore such that the vertical wellbore is blocked. Thereafter at least a portion of the …
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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 6, 1993 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2015.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.