Acid composition and method for acid treating geological formations
CA 1105692 A · Owner: Union Oil Company Of California · Inventors: Young, Donald C.; Maly, George P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acid composition comprising a substantially anhydrous liquid mixture of (1) about 50 to 99 parts by weight of polyphosphoric acid having about 5 to 90 weight percent of the total P205 present as polymeric P205 and (2) about 1 to, 25 parts by weight of hydrofluoric acid and in which the, H20/P205 mole ratio of the overall acid mixture is less than 3.4; and a method for increasing the permeability of siliceous subterranean formations in which the formation is treated with this composition. Also, the composition can optionally contain 0 to about 50 parts by weight of a catalyst such as a strong mineral acid, carboxylic acid, an oxidizing agent or mixtures, thereof.
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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 July 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 1998.
- 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.