Method and apparatus for jet drilling drainholes from wells
CA 2390466 A1 · Owner: Buckman, William G. Sr. · Inventors: Buckman, William G. Sr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nozzle jet drill bits for drilling drainholes from a wellbore are provided in a 4 1/2-inch or, larger casing. The drills are small enough to allow use of a bit diverter to turn the bits, about 90 degrees in the casing when attached to an elastomeric high-pressure tube. Pumping of fluid, which may contain abrasive particles through the bits , allows drilling, though the wall of casing if present, and continued drilling into a formation surrounding, the well without withdrawing the bit from the well. Direction-indicating instruments and, geophones may be used to measure or monitor direction and location of the bit. One type, of jet drill that may be used can change direction of drilling …
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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 June 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2024.
- 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.