Method for producing multiple fractures from a single workstring
CA 2115368 C · Owner: Exxonmobil Oil Corporation · Inventors: Donlon, William Patrick; Strubhar, Malcolm Krabill; Jones, Lloyd Garner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing multiple fractures by a single operation from a single wellbore which penetrates a fracture interval which in turn, includes a plurality of zones which break-down under different fracturing pressures. Fracturing fluid is delivered frown a workstring directly to different levels within a section of the wellbore which lies adjacent the fracture interval through a plurality of alternative paths which, in turn, lie substantially adjacent to the zones to be fractured.
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 August 14, 1992 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2014.
- 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.