Drill bit for directional drilling
CA 2331693 A1 · Owner: Wentworth, Steven W. · Inventors: Wentworth, Steven W.; Crane, Robert F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved drill bit for directional drilling includes a housing or headpiece having means at a rear end thereof for mounting the bit on a trailing component of a drill, head, and passages for ejection of drilling fluid into a borehole. A first axle is mounted to, extend forwardly from a front end of the housing and a first roller is , rotatably mounted on the first axle. The first roller has cutting projections such as carbide studs thereon and, extends outside of the outer diameter of the housing by a distance which defines the size, of the borehole when the drill bit is rotated over 360 degrees. A second axle is mounted, to extend from the front end of the housing and a second …
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 January 22, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2023.
- 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.