Method of casing off a producing formation in a well
CA 1320434 C · Owner: Abdrakhmanov, Gabdrashit Sultanovich · Inventors: Ibatullin, Rustam Khamitovich; Fatkullin, Rashat Khasanovich; Mingazov, Salikhzyan Mukhametzyanovich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of casing off a producing formation in a well includes drilling into the producing formation and reaming the borehole in the producing formation zone. Then the producing formation is shut off with a fluid-impervious envelope of profile pipes which are reamed in the process of their setting by building up a pressure drop across them. Then the flow casing string is run into the well and cemented, followed by reexposing the producing formation. The running-in of the flow casing string is terminated upon its having entered the upper part of the fluid-impervious envelope.
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
- Granted July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
- 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.