| 摘要 |
FIELD: oil-and-gas industry.SUBSTANCE: set of inventions relates to production of hydrocarbons, particularly, to activation of multiple borehole devices for creation of multiple extraction zones. Method of selective activation includes several steps. At first step, combination of coded magnets is defined so that every valve sleeve in well working area includes set of magnets to be attracted to individual set of magnets at activating dart. Then, valves are opened in the selected order defined by individual dart pump feed into well shaft. Proposed mechanism comprises valve with sleeve suitable for displacement between open and normally closed positions, set of valve magnets and dart to be fed by pump in borehole shaft. Set of magnets is arranged an said sleeve. Said dart comprises set of dart magnets coupled with set of valve magnets so that said dart is connected with said valve at location there nearby while sleeve displaces from closed position to open position.EFFECT: higher efficiency of extraction.20 cl, 13 dwg |
