CONTROLLER VALVE Russian patent published in 2004 - IPC

FIELD: hydrocarbons extraction technology and equipment. SUBSTANCE: device has body with one or several upper and lower admission channels, outer packing elements and fixing means. Inside fixing means, at least one controller means in form of chamber of bellows or piston with a rod and/or closure with respective saddle. Closure is mounted under and/or above the saddle, and/or inside the saddle, and/or between saddles, may be either free or spring-loaded, and/or in rigid connection with the rod of bellows or piston chamber. Chamber is made with or without means for charging with compressed gas, and is placed in the body in upper or lower part, according to direction of its rod either downwards or upwards. Effective diameter of bellow or piston is greater than or equal to contact diameter of closure with the saddle. EFFECT: extended functional capabilities of controller valve, increased effectiveness and reliability during testing and/or operation of one or more layers of one pumping, fountain, gas-lifting or delivery well. 16 cl, 31 dwg