Fracturing method and apparatus
CA 2073290 C · Owner: Schlumberger Canada Limited · Inventors: Thiercelin, Marc Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of fracturing an underground formation traversed by a borehole comprising: a) placing an inflatable member inside the borehole in the formation to be, fractured, b) inflating the member so as to exert stress on the formation while, monitoring the pressure of a fluid used to inflate the member so as to determine the, pressure at which fracture initiates; c) isolating the portion of the borehole containing, the fracture; d) propagating the fracture by pressurizing the interval with fluid; and e), monitoring the pressure of the fluid in the interval during propagation.
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 July 7, 1992 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 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.