METHOD FOR MEASURING FLOW OF LIQUID IN WORKING OIL-GAS WELLS AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2005 - IPC

FIELD: oil and gas industry.

SUBSTANCE: method includes changing flowing speed of radial and axial liquid flows and transforming measured values to total liquid flow along well shaft. During change of speed of flow of radial flows from wall or to wall of well force of liquid flow pressure is converted to first derivative of speed with opposite signs. For measuring axial flows forced and continuous rotation of element is performed, which elements takes axial flow of liquid. During measurement force of decrease of speed of forced rotation of sensitive element is measured, which affects change of load on electric engine shaft, performing forced and continuous rotation of sensitive element. On basis of change of power and current force on electric engine change of flow speed is estimated. Device for realization of method has body with groove, into which projecting rotary lever is inserted, with localizers. Sensitive element in form of plate, taking radially directed flows of liquid, is mounted on projecting rotary lever in such a way, that its plane during rotation is always directed to well wall. During deviation of plate, its bend transfers to force sensor. In lower portion of body, flow meter has additional micro-electric engine for forced and continuous rotation of sensitive element, taking axial flows, made in form of bladed propeller, positioned in protective cover with side ports. Electric engine shaft is connected to propeller axis via non-inertial sleeve, made in form of tight cylindrical couple. During operation of electric engine propeller rotates with calculated speed continuously. Axial flows of liquid along well will slow down this rotation, which causes alternation of electric engine electricity consumption.

EFFECT: higher precision.

2 cl, 1 dwg