METHOD FOR KEEPING FLOW SECTION OF TUBING COLUMN IN OPERATION WELL IN OPERATIVE STATE Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: method includes cleaning of inner surface of tubing pipes column by scrapers with reciprocal and rotary movement of scrapers relatively to column of tubing pipes and removing deposits from tubing pipes by flow of extracted fluid. Automatic scrapers are used, moving upwards due to use of energy of flow of extracted fluid. In tubing column several automatic scrapers are positioned, while change of direction of movement of upper and lower automatic scrapers downwards and upwards respectively is performed during interaction of upper automatic scraper with upper dive limiter in pipes column and lower automatic scrapers with lower drive limiter in pipes column, and change of direction of movement of above-said scrapers on backward direction is performed during interaction of scrapers as a result of collision of higher scraper with lower scrapers during their movement towards each other.

EFFECT: higher efficiency.

5 cl, 1 dwg