FIELD: oil and gas industry.
SUBSTANCE: method implies lowering of scraper at the specified depth and lifting to set upper position by means of rope movement in relation to winch drum. Parameters of scraper lifting and lowering are controlled by measurement of winch traction power depending on value of instantaneous power consumed by electric motor. This value is transferred from indicator of consumed power to noncontacting gauge of depth, electric motor speed governor via switching node and control unit.
EFFECT: reducing operating costs, preventing emergency conditions and disruption of cycle of oil wells pipes cleaning.
1 dwg
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