Method and well tool for gravel packing a well using low-viscosity fluids
CA 2247445 C · Owner: Mobil Oil Corporation · Inventors: 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 and well tool (10) for using a low-viscosity slurry (22) to gravel pack an interval (12). The well tool (10) is comprised of a conduit which includes a main screen (17) and an upper by-pass screen (18). The tool (10) is lowered into the interval (12) and slurry (22) is pumped into the annulus (23) around the screen (17) whereby fluid from the slurry is lost into the casing perforations (14) while the gravel (25) falls to the bottom of the annulus (23) to form the gravel pack (26). When the gravel (25) rises above the uppermost perforations (14), fluid (24) from the slurry (22) by-passes the gravel pack (26) by flowing into the by-pass screen (18) through a washpipe , (21) …
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 February 21, 1997 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2019.
- 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.