Instrumentation tubing string assembly for use in wellbores
CA 2239210 C · Owner: Chhina, Harbir Singh · Inventors: Moffatt, Terry George; Chhina, Harbir Singh; Chalaturnyk, Richard John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coil of continuous steel tubing string is stretched along the ground. An elongate bundle of instrument lines including thermocouples and pressure sensor wiring is threaded into the bore of the tubing string. The instrument lines are landed at multiple spaced apart measurement points along the string. The string and the contained bundle are cut at pressure measuring points. A tubular sub having a side port is supplied for each point. One set of cut line ends is threaded through the sub and reconnected with the other set. A pressure sensor is inserted in the string at the cut point and connected with pressure sensor wiring and the port. This process is repeated along the tubing string. The …
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 May 29, 1998 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2020.
- 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.