Formation testing apparatus and method
CA 2108914 C · Owner: Beck, Harold Kent · Inventors: Ringgenberg, Paul D.; Beck, Harold Kent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an apparatus and method for testing a subterranean formation. The inventive apparatus comprises an internal-external differential pressure operated circulation tool, an external pressure operated drill stem testing tool, and an external pressure operated formation testing tool. The drill stem testing tool is positioned in the inventive apparatus beneath the circulation tool and the formation testing tool is positioned in the apparatus beneath the drill stem testing tool. In the method of the present invention a testing, string comprising the inventive apparatus is run into a well bore.
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 October 21, 1993 and granted June 24, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2015.
- 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.