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Hydraulic protection used in electric centrifugal pump unit in oil and gas industry, has shaft that is passed through hydraulic protection to pass through central holes of nipples and base, where holes for oil circulation are made along shaft and under heel 2024-09-26
Vortex gas separator used in electric centrifugal pumping units (ESP) of various sizes in oil industry, has auger, wheel, guide apparatus and swirler that are sequentially located on shaft, and bumpers that are arranged on shaft, on head side and on base side 2024-08-23
METHOD FOR SMALL-PLOT BREAKDOWN OF FIELD WITH MARKER ON SELECTION AND SEED-GROWING CROPS OF GRAIN CROPS 2023-12-20