Tubing saver rotator and method for using same
CA 2423571 A1 · Owner: Hart, Philip E. · Inventors: Hart, Philip E.; Thomson, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a tubing rotator assembly for attachment to an existing, casing head for purposes of suspending and rotating a tubing string in an oil well. In, the preferred embodiment, the tubing assembly includes a rotation surface such as a, bearing, in-which a tubing mandrel rests and allows one to rotate the tubing manually, above the wellhead. It provides a low profile reducing the distance between the casing, head and the pumping tee, which may eliminate the need for one to raise the pumping, unit to fit on the rotator. In addition the conventional seals above the , rotation surface have less chance of leaking fluids located between the casing and tubing due …
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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 March 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2025.
- 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.