Gasslöfteventil med venturi for regulering av injeksjonsgassströmning i oljebrönner som produserer ved kontinuerlig gasslöft

摘要

The present invention relates to a gas lift valve for use in an oil well producing by means of gas lift, said gas lift valve making use of a central body venturi for both controlling the flow of the injection gas from the annulus between the tubing and the casing of the oil well, and precluding a reverse flow of fluids from said oil well towards said annulus to occur.