Well treating compositions containing polymer plugging or fluid loss reducing agents
CA 1050743 A · Owner: Union Oil Company Of California · Inventors: Scheffel, John W.; Fischer, Paul W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water-insoluble particulate composition having controlled slow oil-solubility at temperature in excess of 350° F. is disclosed. The composition is comprised of solid particles of a homogeneous mixture of (1) polyethylene ethylene-vinyl acetate, copolymer containing about 15 to 30 weight percent vinyl acetate or admixtures of these polymers; (2) a polyamide having a melting point of between about 400° F. and 460° F.; and (3) a softening agent such as a long chain aliphatic diamide having a melting point between about 280° F. and 300° F. or a polyterpene resin having amelting point of between 230° F. and 275° F. Also disclosed is a method of using this particulate composition in well …
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 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 1996.
- 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.