PROCESS FLUID FOR CLEANING BOTTOMHOLE FORMATION ZONE, WELL SHAFT, INNER SURFACE OF TUBING STRING, BOREHOLE FILTERS Russian patent published in 2020 - IPC C09K8/524 

FIELD: mining; chemistry.

SUBSTANCE: group of inventions relates to process fluids for cleaning a bottomhole formation zone, a borehole, an inner surface of tubing string and downhole filters. According to the first embodiment, process fluid for cleaning of bottomhole formation zone, well shaft, inner surface of tubing string, downhole filters contains the following, %: gasoline 20–50; kerosene 20–50; high-aromatic petroleum distillate 10–50; terpenes and pinenes 10–50; isopropyl alcohol 0–15; ketones 0–1.5. According to the second embodiment, process fluid for cleaning of bottomhole formation zone, well shaft, internal surface of tubing string, downhole filters contains, %: white spirit 40–70; terpenes and pinenes 13.5–50; isopropyl alcohol 0–15; ketones 0–1.5.

EFFECT: technical result is complex action, universality, storage life of not less than known process fluids used in said areas.

2 cl, 2 tbl