EVALUATION METHOD OF EFFECTIVENESS OF SOLVENTS OF ORGANIC DEPOSITS Russian patent published in 2011 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: method involves extraction of samples of organic deposits from well or from well equipment, application on metal surface, determination of mass, action by means of solvent, determination of mass after action, and recording of results. According to the invention, sample with non-destructed structure is taken. Metal plate is used as metal surface. Sample is applied to heated metal plate by building-up. Metal plate with built-up sample is cooled and mass of metal plate with sample is determined. Metal plate with built-up sample is suspended on pallet hook of analytical scales with measurement accuracy of about 0.0001 g and lowered into vessel with tested solvent. Vessel is thermostatically controlled. Mass is measured continuously or periodically and results are fixed. In the same way the samples are prepared and lowered into vessel with other solvent. Similar measurements are made, test results of various solvents are compared and as per rate of solution and value of solution the effectiveness of solvents is evaluated.

EFFECT: improving evaluation accuracy of effectiveness of solvents of asphalt-resin-paraffin deposits.

1 ex, 1 tbl, 2 dwg