Slip spool and method of using same
CA 2366404 A1 · Owner: Dallas, Murray L. · Inventors: Dallas, Murray L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A slip spool for selectively supporting a tubing string suspended in a wellhead can be mounted to a wellhead. The slip spool has an axial passage to be aligned with the wellbore and at least two radial passages extending through a side wall of the slip spool and communicating with the axial passage. At least two slip anchors, each pivotally connecting with a wedge-shaped slip jaw, are slidably received within the respective radial passages. The slip spool further includes actuators for moving the respective combinations of the slip anchors and slip jaws between a retracted position in which the slip jaws clear the axial passage of the slip spool and an, extended position in which each …
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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 December 21, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2023.
- 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.