Method and system for cleaning an unweighted oil based drilling fluid
CA 1293490 C · Owner: Dresser Industries Inc. · Inventors: Martin, Troy James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for cleaning an unweighted oil based drilling fluid containing suspended solid particles includes adding a controlled amount of water to the drilling fluid flowing in a suction line to a centrifugal separator. The addition of water to the fluid results in the particles becoming wet. The wet particles will stick together and separate from the drilling fluid under the influence of centrifugal force.
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 December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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.