METHOD FOR EVALUATING EFFECTIVENESS OF DOWNHOLE FILTERS USED IN SAGD-WELLS DURING OPERATION OF FIELDS WITH HIGH-VISCOSITY OIL, AND STAND FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC E21B47/00 G01M10/00 

FIELD: comparative thermohydraulic testing.

SUBSTANCE: inventions group relates to means for comparative thermohydraulic testing of the throughput of downhole filters. A method is proposed, in which the tested downhole filters are installed in compartments separated by vertical partitions in the lower zone of a housing with heat-insulated walls, equipped with a hermetically closing hatch with a safety valve, the compartments are filled with sand, a liquid medium is introduced into the housing, simulating the formation fluid, so that the heat supply unit is completely immersed in a liquid medium, with a hermetically closed housing hatch, a heat carrier is supplied - steam, followed by the direction of this heat carrier through a connecting pipeline to a steam supply unit in the upper area of the housing, in the form of a perforated pipe and equipped with a steam outlet line with a pressure gauge and shut-off valves installed on it; of the case, and filtering the liquid medium through sand and the tested filters with the filtrate discharge through the outlet pipe with shut-off valves, which is equipped with each compartment. A stand is also proposed, containing a housing with heat-insulated walls, with a hermetically closing hatch with a safety valve, with the execution inside the housing in its lower zone, two compartments for filters, separated by partitions, and equipped with shut-off valves and a temperature sensor, inside the housing above the compartments are arranged in series the height of the heat supply and steam supply units, connected by a pipeline, the heat supply unit in the form of a tubular element is equipped with a coolant inlet line, and the steam supply unit - with a steam outlet line with a pressure gauge and shutoff valves, while the heat supply and steam supply units are equipped with temperature sensors, and the stand body is equipped with a pressure control sensor. The invention is developed in the dependent claims.

EFFECT: providing an assessment of the throughput of downhole filters with a wide range of exposure parameters, while ensuring the reliability of test results by approaching test conditions to full-scale ones, by exposure to high pressure, temperature and formation fluid.

6 cl, 1 dwg, 2 tbl