Drill bit and improved cutting element
CA 1214159 A · Owner: Strata Bit Corporation · Inventors: Morris, Wilford V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drill bit for connection to a drill string has a bit body (2) with a cutting face (7), which supports a plurality of cutting elements (18). The cutting elements (18) comprise a cylindrical supporting stud (19) of sintered carbide which has a diamond cutting element (26) mounted thereon. The diamond cutting elements (26) have a novel cutting shape facilitating drilling through hard formations with a minimum of applied weight on the bit. The cutting elements (26) are in the shape of a relatively large disc shaped cutter commonly used for medium and soft formations but have the sides shaped into a cutting edge (126) of substantially smaller radius. The cutting element (26) has the strength …
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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
- Granted November 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 2003.
- 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.