METHOD FOR DETERMINING AND EVALUATING EFFECTIVENESS OF ASPHALT PARAFFIN DEPOSIT SOLVENTS Russian patent published in 2014 - IPC E21B43/22 

FIELD: construction.

SUBSTANCE: method for determining and evaluating effectiveness of asphalt paraffin deposit solvents involves selection of samples of asphalt paraffin deposits from oil equipment, application of the deposits on a metal plate, weight determination, attack by a solvent. Besides, the method includes weight determination as a result of attack by the solvent, fixation of results, hanging of the metal plate with the applied sample on the balance hook, continuous measurement of the sample weight, determination of weight of the metal plate with the sample, lowering it into a vessel with the test solvent, the vessel thermostatic control, fixing of the results; similar preparation of other samples and lowering them into the vessel with other solvent, conduction of similar measurements, comparison of the test data of different solvents and taking into account the "wall effect". In this case, the sample with native (without fusing) structure is used; the metal plate with the applied sample is hung on the hook of the torsion balance arm, and comparison of the test data of different solvents is performed by kinetic curves of their dissolution, obtained via the anamorphosis. At that, the order of dissolution reactions and limiting stages, rate constants of dissolution, time during which the half of the amount of the asphalt paraffin deposits pass into a solution, provided that the process flows as the first-order reaction, as well as the effective activation energy of the deposit destruction are calculated, and effectiveness of asphalt paraffin deposit solvents is estimated by the received values of kinetic parameters at one or another temperature.

EFFECT: increase of assessing accuracy of reagent effectiveness in order to remove the asphalt paraffin deposits, in this case the kinetic aspects of the process of their dissolving and temperature interaction mode with solvents are taken into account.

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