METHOD OF PREPARING SOLID FOAMING AGENT FOR REMOVING LIQUID FROM GAS OR GAS CONDENSATE WELLS Russian patent published in 2008 - IPC C09K8/94 

FIELD: oil and gas production.

SUBSTANCE: particular objective of invention is removal of high-mineralization (including formation) water and mixtures thereof with gas condensate from marginal gas and gas condensate wells. In a method of preparing solid foaming agent including mixing nonionic surfactant with urea and molding resulting mixture, urea is preliminarily dissolved in water preheated to 50-90°C at weight ratio (9-10):1, respectively, and mixture is then heated to form true solution. Nonionic surfactant is heated to 40-80°C and mixed with true solution of urea at weight ratio (1.0-1.4):1, respectively. Before molding, to resulting liquid-crystalline component mixture is added a water-soluble polymer at weight ratio 1:(0.01-0.05), respectively, or mixture of water-soluble polymer and dissolution retardant at weight ratio liquid-crystalline component mixture/water-soluble polymer/dissolution retardant 1:(0.01-0.05):(0.4-0.6).

EFFECT: increased strength properties of solid foaming agent and enhanced absolute carrying-out capacity thereof.

4 cl, 3 dwg, 6 ex