Drilling bit with a single cutting head
CA 1082685 A · Owner: Barnetche-Gonzalez, Eduardo · Inventors: Barnetche-Gonzalez, Eduardo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary drill bit for drilling a well in the surface of the earth the -drill bit comprising a drill bit body including an upper portion for connection to a drill string, duct means for carrying fluid to extract detritus and clear the bottom of the well and receiving means; a solid cutting head comprising a conical head portion and a stem portion the conical head portion including, holes therein and cutting elements inserted in the holes the stem portion --, being received in the receiving means of the drill bit body wherein the stem, and the receiving means include holding means for rotatably holding the - cutting head in the drill bit body; bearing means between the drill bit body and 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
- Granted July 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 1997.
- 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.