HYDROCARBON GEL BASED ON ORTOPHOSPHORIC ACID ESTER IRON SALTS Russian patent published in 2007 - IPC C09K8/64 C09K8/524 

FIELD: oil and gas production and transportation.

SUBSTANCE: invention concerns hydrocarbon-based gel-like fluids-sand carriers used in formation rupture operations and gel-scraper compositions used for cleaning petroleum product and crude oil pipelines. Hydrocarbon gel composition comprises: gel-forming agent constituted by 55-65 vol % orthophosphoric acid esters, 15-35 vol % nitrogen-containing complexion agent, and solvent; destructor: calcium oxide or mixture of calcium oxide (10.0-60.0%) and sodium carbonate or bicarbonate (40.0-90.0); hydrocarbon liquid: gas condensate or crude oil, or diesel fuel; activator constituted by, vol %: iron sulfate containing 12 wt % Fe³⁺, 30.0-42.0, triethanolamine 0.5-8.0, cationic surfactant (neftenol GF or katamin AB, or arkvad S-50, or arkvad T-50) 8.0-20.0, ethylene glycol 5.0-12.0, acetic acid 10.0-18.0, and fresh water - the rest. Hydrocarbon gel finally contains 0.3-10.0 vol %: gel-forming agent, 0.3-10.0 vol % activator, 0.5-10.0 kg destructor per 1 m³ hydrocarbon gel, and hydrocarbon liquid in balancing amount.

EFFECT: enabled destruction of composition at required time moment at formation temperature 20-80^°C.

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