Method of fracturing and propping a formation
CA 2195966 C · Owner: Jones, Lloyd G. · Inventors: Jones, Lloyd G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for fracturing and propping a thick and/or non-homogeneous fracture interval (12) of a subterranean formation which is traversed by a wellbore(11). A workstring (20) is lowered into the wellbore and a fracturing fluid (30) is flowed into one end of the fracture interval annulus (33a) (i,e. that portion of the well annulus (33) which lies adjacent the fracture interval) to initiate a fracture. The flow of fracturing fluid is ceased and a slurry (31) containing proppants is flowed into said one end of the fracture interval annulus. During flow of fracturing fluid and slurry into said one end of the annulus, both are delivered through alternate flowpaths (24) to different levels …
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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 23, 1995 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2017.
- 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.