Apparatus and method for subterranean injection of slurried wastes
CA 2240580 C · Owner: Rothenburg, Leo · Inventors: Bilak, Roman Anthony; Rothenburg, Leo; Dusseault, Maurice Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Injection of slurried wastes is carried out within deeply buried strata. Appropriate target strata are identified in terms of sufficient porosity and permeability and overburden that includes permeable and impermeable strata. Slurry is injected at sufficient pressure to establish fracturing within the target strata. The injection pressures and the resulting waste pod are monitored by a suite of monitoring procedures including bottomhole pressure and surface uplift. The injection is carried out in a series of injection episodes separated by interinjection episodes. Apparatus for preparing and injection the slurry include a mixing chamber a partly encased well and a bottomhole pressure gauge. …
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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 June 12, 1998 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2020.
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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.