Drilling motor drill bit reaming stabilizer
CA 2255179 C · Owner: Majkovic, Davor · Inventors: Majkovic, Davor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one embodiment, the invention provides a drilling assembly comprising a motor a reaming stabilizer and a drill bit. The motor is adapted to be attached to a drill string the motor includes a drive shaft with a mandrel mounted at the bottom end of the shaft. The reaming stabilizer is attached to the shaft of the motor by the mandrel so that the stabilizer may be rotatably driven by the motor. The drill bit is attached to the stabilizer to be rotatably driven by the stabilizer. The stabilizer is sized so that the overall length of the drilling assembly is increased by a maximum of about 16 inches. Greater lengths may reduce motor bearing life adversely affect the steering of the tool or …
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 December 3, 1998 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2020.
- 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.