Method of preheating a heavy oil zone through existing bottom water and then diverting steam into the oil zone
CA 2039920 A1 · Owner: Strom, Edwin Thomas · Inventors: Strom, Edwin Thomas; Sanchez, James Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
F-5726;, METHOD OF PREHEATING A HEAVY OIL ZONE THROUGH EXISTING BOTTOM WATER AND THEM DIVERTING STEAM INTO THE OIL ZONE, ABSTRACT A method for recovering viscous oil from a formation having a bottom water zone below an oil containing zone. Steam is directed into the bottom water zone thereby heating this zone and an oil containing zone thereabove. Afterwards steam, injection is ceased and a gellable composition is directed into the bottom water zone where it forms a solid gel. Once the solid gel has formed steam is, injected into the bottom water zone where the solid gel causes it to flow upwardly into the oil containing zone. Oil, water, and steam are removed via a recompleted producer …
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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 April 5, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2013.
- 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.