AUTOMATIC BOREHOLE LEVEL METRE Russian patent published in 2009 - IPC E21B47/04 G01F23/296 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to research of gas- and oil producers and can be used for control of fluid level in hole during the process of its operation. For this level metre contains controller, connected by first data-out with winding out at least one electromagnetic solenoid, connected by controlling outs with outs of at least one depress valve in borehole annulus. Valve is geared with nozzle slide valve of borehole annulus. To first data-outs of controller it is connected by outs units of pressure measurement and acoustic signal recept. By second data-outs and outs controller is connected, correspondingly, to outs and inputs of unit of registration and data collection about the liquid level in borehole. Additionally at least one electromagnetic solenoid and unit of registration and data collection are located in the vessel with ability of pressure-tight joint with nozzle of borehole annulus.

EFFECT: reliability growth of level metre operation, reduction of its power consumption and reduction of overall dimensions, specified by new schematic structure of the device.

8 cl, 1 dwg