Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1994-09-23
1997-01-07
Tucker, Philip
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
507203, 507241, 507243, 507244, 507245, 507246, 507247, 507248, 507250, 507251, 252307, 252355, C09K 702
Patent
active
055917011
ABSTRACT:
In the removal of particulates from a wellbore, such as in air drilling for hydrocarbon recovery, a mixture of an amphoteric foaming agent and, typically, an anionic surfactant is employed. An aqueous solution thereof having a pH of at least 9.5 is used to generate a foam for removing the particulates; then the foam is collapsed by the introduction of acid to reduce the pH below about 4, the particles are removed mechanically, the pH is restored to greater than 9.5, and the foaming solution is returned to the wellbore. The solution may be used several times; partial losses of foaming agent in the process may be easily replenished with each cycle. Cationic surfactants may be used instead of anionic, with foaming and foam collapse being controlled at opposite pH's. Savings are realized in water, drilling chemicals, and settling pits and the like for removing particulates from the foam.
REFERENCES:
patent: 3076508 (1963-02-01), Lissant
patent: 3155178 (1964-11-01), Kirkpatrick et al.
patent: 3229777 (1966-01-01), Rogers et al.
patent: 3303896 (1967-02-01), Tillotson et al.
patent: 3391750 (1968-07-01), Zika
patent: 3572440 (1971-03-01), Hutchinson
patent: 4113631 (1978-09-01), Thompson
patent: 4201678 (1980-05-01), Pye et al.
patent: 4232741 (1980-11-01), Richardson et al.
patent: 4263177 (1981-04-01), Egan et al.
patent: 4425243 (1984-01-01), Green et al.
patent: 4461716 (1984-07-01), Barbarin et al.
patent: 4554082 (1985-11-01), Holtmyer
patent: 4796702 (1989-01-01), Scherubel
patent: 5000868 (1991-03-01), Wittpenn, Jr. et al.
Clearwater, Inc.
Krayer William L.
Tucker Philip
LandOfFree
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