Sand sleeve and method of use of the same
CA 2319674 C · Owner: Delaney Energy Services Ulc · Inventors: Quinn, Desmond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sand sleeve and method of use of the same. The sand sleeve has a tubular body with a plug seat at a second end to accommodate a removable plug and shiftable sleeve at a first end that can be shifted to an open position to permit fluid flow, while the removable plug is in place. The sand sleeve is inserted into a well with the shiftable sleeve in a closed position and the tubular body in an orientation where a first end is above a second end. The shiftable sleeve is shifted to the open position with the removable plug engaged with the plug seat. This permits entry of oil and gas into the well from a formation through the radial flow openings while the removable, plug prevents fluids from …
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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 3, 2000 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2022.
- 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.