Method for dissolving clay

Details Method for dissolving clay Method for dissolving clay

1976-07-06

1977-11-01

Novosad, Stephen J.

Wells

Processes

Chemical inter-reaction of two or more introduced materials

166307, 423132, E21B 4327

Patent

active

040561461

ABSTRACT:
A method for dissolving clay is disclosed which comprises contacting the clay, in alteration, with separate slugs of a hydrogen ion-containing chemical and a fluoride ion-containing chemical. The hydrogen ions and fluoride ions react on the surface of the clay to produce hydrofluoric acid to dissolve the clay. The method is particularly valuable in dissolving the clay in a mixture of sand and clay without dissolving the sand. This finds immediate value in the practice of acid treating subterranean sandstone formations to increase permeability or to restore permeability damaged by clay.

REFERENCES:
patent: 1480928 (1924-01-01), Bishop
patent: 1990969 (1935-02-01), Wilson
patent: 2094479 (1937-09-01), Vandergrift
patent: 2466674 (1949-04-01), Mullady
patent: 2782859 (1957-02-01), Garst
patent: 2885004 (1959-05-01), Perry
patent: 3025911 (1962-03-01), Bergman
patent: 3483923 (1969-12-01), Darley
patent: 3543856 (1970-12-01), Knox et al.
patent: 3707192 (1972-12-01), Goins, Jr. et al.
patent: 3828854 (1974-08-01), Templeton et al.
Van Poollen, "How Acids Work in Stimulating Production and Injection Wells," Oil and Gas Journal, Sept. 11, 1967, pp. 93-98.

Affiliated with

Also associated with

Rating

Method for dissolving clay does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for dissolving clay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for dissolving clay will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3378