Downhole milling device
CA 2334150 A1 · Owner: Willemse, Onno · Inventors: Anderson, Mark Wilson; Fisher, Simon Lawrence; Amory, Marc Emmanuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for performing milling operations in an underground borehole comprises a toppling head (2) which is pivotably secured to a stator housing (1) and which is equipped with one or more rotatable mills (3 4) which are in , use pivoted together with the toppling head (2) into an extended position from the stator housing (1) to mill a window in a surrounding casing (23) or to , underream the wellbore whilst the stator housing is rotated in the wellbore.
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 June 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2021.
- 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.