SOLID FOAMING AGENT FOR REMOVAL OF LIQUID FROM BOTTOM HOLE Russian patent published in 2012 - IPC C09K8/536 C09K8/92 

FIELD: oil and gas industry.

SUBSTANCE: solid foaming agent for removal of liquid from bottom hole, which is obtained using ammonium carbonate and surface active substances - non-ionic- OP-10 or OP-7 and anionic - sulphanole by formation of mixture and its solidification, where at ratio of OP-10 or OP-7 and sulphanole of 3.3-5.2:1.0 the mixture also contains Kolamid K; at that, mixture is prepared by mixing of OP-10 or OP-7, sulphanole and Kolamid K, by heating of the obtained mixture of up to 40-60°C, by its mixing till sulphanole is diluted, and then, by adding ammonium carbonate, at the following component ratio, wt %: OP-10 or OP-7 33.0-52.0, sulphanole 10, ammonium carbonate 0.2-0.5, and Kolamid K is the rest.

EFFECT: improving foaming efficiency and carry-over of high-mineralised waters in presence of gas condensate from bottom holes of low temperature gas and gas-condensate wells, and improving the manufacturability of solid bars - sticks.

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