Method and system for gas-lifting well effluents

Details Method and system for gas-lifting well effluents Method and system for gas-lifting well effluents

E - Fixed Constructions

21

B

E21B 43/16 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2407734

A method and system for gas-lifting well effluents utilizes a porous wall in which an array of small lift-gas injection ports is present such that lift-gas is injected as an agglomerate of finely dispersed micro-bubbles into the stream of well effluents. In this way the lift-gas and produced crude oil form a froth and the risk of slugs of lift-gas that bypass slugs of crude oil and create an unstable flow regime is minimized.

L'invention concerne un procédé et un système permettant l'extraction par éjection (gaz-lift) d'effluents de puits, utilisant une paroi poreuse dans laquelle une matrice de petits ports d'injection de lift-gaz est ménagée de sorte que le lift-gaz soit injecté pour servir d'agglomérat de micro-bulles finement dispersées dans le courant des effluents de puits. De cette manière, le lift-gaz et le pétrole brut produit forment une mousse permettant de réduire le risque de bouchons de lift-gaz qui contournent les bouchons de pétrole brut, créant un régime d'écoulement instable.

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