Advantages of a new nozzle valve for gas lift

Two types of gas-lift valves are used. In the first type, there is a mechanism to open or close the valve, according to pressure and/or temperature conditions in the well. A charged bellows is the most common mechanism. The second type is valves that are always open (in the casing-to-tubing direction). These valves employ a choke to restrict flowrate and a check valve to avoid reverse flow from tubing to casing. The most commonly used choke is a cylindrical plate with a square-edge orifice. Alternatively, a choke with Venturi geometry may be used. These valves are commonly called orifice or Venturi (or Venturi-nozzle) valves. Typically, the charged bellows type is used as discharge valves, while the operating valves are of the orifice or Venturi type.

Log in to view this article.

Not yet a subscriber?  Find out more and subscribe today! 

Already a subscriber but don’t have an online account? Contact our customer service.



*Access will be granted the next business day.