Stabilized drill tube
CA 2038378 C · Owner: Jks Boyles International Inc. · Inventors: Laporte, Irvin Joseph (Bud); Watkins, Amos Jack
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stabilized drill string component includes an elongated tubular body. This body comprises a tubular stabilization section and at least one further tubular section. These tubular sections are integrally joined together in axially aligned relation. The stabilization section is much shorter than the further tubular section or sections but has a somewhat greater diameter than the latter such that the stabilization section can assist in stabilizing the drill string component during drilling by way of contact with the wall of the well bore. The wearing surfaces of the stabilization section are of substantially harder material than that of the further tubular section or sections thereby to …
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 March 25, 1991 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2013.
- 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.