Drilling and completion fluid
CA 1296514 C · Owner: Hydra Fluids, Inc. · Inventors: Peterson, Thomas E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drilling mud comprises water a gelling agent, a defoamer, and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof. The drilling mud is normally prepared by adding to a pre-existing water based mud having therein the gelling agent caustic soda, lignite and lignosulfonate. A completion fluid comprises water a defoamer and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof.
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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.