O-21R-B

Applications

• Flow control from annulus to tubing (tubing-to-annulus configuration also available)
• Continuous-flow gas lift production
• High-performance gas lift installations

Benefits

• Enhances safety and wellbore integrity
• Reduces downtime with reliable, robust performance
• Lowers costs with versatility and efficiency
• Operates uniformly across a range of injection pressures to increase production

Features

• Field-proven design and operation
• Qualified to API Spec 19G2 V0 and TR2385
• Corrosion resistance with premium metallurgy
• Zero-bubble seal stack
• Barried-qualified back-check system that provides a robust seal between tubing and annulus
• Compatible with oval and round gas lift mandrels

How it improves performance

O-21R-B Barrier Series single-point-injection orifice gas lift valves are used for continuous-flow gas lift production applications. Based on field-proven technology, these 1.5-in-OD retrievable valves feature a barrier-qualified back-check system, incorporating a metal-to-metal seal that has been developed and tested to meet API Spec 19G2 V0 standards. The back-check system has enhanced geometry to minimize erosion while maintaining dart stability during high-rate operations.

An integral choke controls flows through the normally open gas lift valve into the production conduit. The seal stack has been tested beyond API specifications to meet zero-bubble requirements.

The increased performance and reliability enabled by these features permit installing the O-21R-B gas lift valve as a well barrier element.

How it works

For standard operation, the valve is installed in a side pocket mandrel. Injected high-pressure gas enters the mandrel inlet and the O-21R-B valve through the ports between the seal stacks and travels across the orifice, down to the back-check system, and into the production conduit.