Drill bit direct drive for deep well drilling tools
CA 1300592 C · Owner: Eastman Christensen Company · Inventors: Kruger, Volker; Daenicke, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drill bit direct drive for deep well drilling tools with a tubular casing, a rotary machine that can be driven by oil well fluid flowing through it and is mounted inside the casing, a radially mounted shaft joined to this rotary machine and to a rotary drill bit and with at least one friction bearing that is exposed to the oil well fluid and is provided for axial mounting of the shaft and includes at least one trace ring supported on the shaft plus at least one bearing ring supported on the casing so it interacts with one trace ring and has a number of bearing segments distributed regularly around its periphery and including a bearing body supported with respect to the bearing ring so it …
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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.