| 摘要 |
This invention relates to a liquid foaming additive comprising (a) a nonionic fluorochemical surfactant; and (b) a nonionic heteric polyether surfactant having at least two additive hydrogen atoms wherein components (a) and (b) are used in an effective amounts. The foaming additives are used to foam lower alkyl alcohols which are injected into oil and gas wells to break up underground formations which trap the oil and gas.
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