OIL WELL FLOW RATE DETERMINING METHOD AND DEVICE FOR METHOD'S IMPLEMENTATION Russian patent published in 2009 - IPC E21B47/10 

FIELD: oil industry.

SUBSTANCE: group of inventions refers to oil industry and namely to oil well flow rate determining methods. Such method involves division of the well production into liquid phase - water oil phase and gaseous phase by means of a separator. At that, divided phases prior to their being supplied to the measuring capacity through the first flow switch are first moved via separate lines to the additional flow switch with a drive connected via hydraulic lines to the exhaust line and to the first flow switch. Then the well production is fed to horizontal calibrated and tight measuring capacity with a dividing piston to its end sections via hydraulic lines and forced to one of hydraulic lines at the piston's back-and-forth movement. The above phases are supplied and discharged to the measuring capacity through the first flow switch through hollow elastic and sensitive elements - torsions, and through horizontal hollow pins hydraulically connected to them and on which the measuring capacity is retained. Centre of gravity of the measuring capacity is offset relative to rotation axes installed on movable rigid supports located outside the measuring capacity zone. Rotation axes are rigidly connected to torsions and equipped with expansion couplings and torque sensors electrically connected to the monitoring and control unit; at that, the other end faces of torsions are plugged with a plug. The dividing piston's position is registered with sensors and the signal is supplied to the monitoring and control unit when it comes to one of the ends of the measuring capacity. Overall mass of the measuring capacity with the dividing piston with the specified liquid value is recorded and supplied to the control unit memory in the form of an electric signal.

EFFECT: decreasing the well flow rate determining error, simplifying the design and enlarging functional capabilities.

9 cl, 1 dwg