Borehole stressed packer inflation system
CA 2093600 C · Owner: Wood, Edward T. · Inventors: Brooks, Robert T.; Wood, Edward T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for determining a proper inflation pressure for an elongated inflatable packer, to effect a positive contact stress seal of an elastomer packer element with a borehole wall in a, wellbore traversing earth formations. The temperature differential for each layer in a radial plane, is determined. The final contact stress the finite inflation pressure , required to inflate the packer element and the temperature differential are functionally interrelated to one another to obtain a, final contact stress of the packer element with a borehole wall.
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 April 7, 1993 and granted November 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.