Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2007-03-20
2007-03-20
Gulakowski, Randy (Department: 1712)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S260000, C507S273000, C507S277000, C507S933000, C166S300000, C166S307000
Reexamination Certificate
active
10249573
ABSTRACT:
An aqueous oilfield treatment fluid containing a chelating agent and an HF source is described. This fluid is effective at dissolving siliceous materials such as clays and keeping the dissolved materials in solution. In particular it is effective at preventing re-precipitation of initially-dissolved silicon as silica and therefore reduces damage to sandstones with which it is contacted. Methods are given for using this fluid for sandstone matrix stimulation, removal of clay-containing drilling fluid components and filter cakes from wellbores, sandstone acid fracturing, and gravel pack and proppant pack cleaning.
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Chang Frank
Davies Stephen
Frenier Wayne
Ziauddin Murtaza
Cate David
Curington Tim
Gulakowski Randy
Kugel Timothy J.
Nava Robin
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