Inserting device for coiled tubing
CA 2173416 C · Owner: Strand, Harald · Inventors: Strand, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inserting device for coiled tubing (8) comprises a top drive (7) having a through-going sleeve-shaped shaft (6) and an injector (10) for coiled tubing (8). The coiled tubing (8) is passed through safety valves (16) packer (12) as well as a valve (13) and further through the top drive's (7) sleeve-shaped shaft (6). The coiled tubing (8) is passed over a guide wheel (9). Drilling fluid is conducted to the top drive (7) through a hose (3) running over a caster (4) and a drilling fluid valve (5). A packer (12) seals around the coiled tubing (8) and the valve (13) is adapted to be capable of cutting the coiled tubing (8).
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 3, 1996 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2018.
- 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.