Application | Well Abandonment & Barrier Verification



When conducting well suspension operations, ensuring the long-term pressure integrity of the barrier is critical. Typically, the barrier is leak tested by pressurizing from above shortly after installation. However, these tests do not allow monitoring of the differential pressure across the barrier or any means of monitoring medium- or long-term hydraulic integrity.

Acoustic Data’s SonicGauge™ Wireless Monitoring System can be deployed with mechanical plugs or metal barriers to instrument both the initial pressure testing and provide ongoing pressure measurement from both above and below the plug. The system can be configured to provide data over several years due to the technology operating on an ultra-low energy budget.

The SonicGauge is deployed directly on to a third-party plug or independently on the Barracuda™ HEX-Hanger™ (high expansion gauge hanger). A corresponding SonicGauge Repeater with an onboard pressure transducer is often deployed on a HEX-Hanger above the plug to record pressure above the barrier. It also records the pressure data transmitted by the SonicGauge from under the barrier. Both sets of data are sent to surface in real-time. If real-time reporting is not required, the SonicGauge Repeater can be retrieved by slickline from time-to-time to analyse the historical data that has been saved to onboard memory.

The Barracuda™ product line also includes a HEX-Retainer™; a high expansion basket retainer that can be deployed by slickline through 2-7/8” tubing and set in up to 7” casing size. It is used to retain cement, frac sand, metal alloy such as bismuth-tin (BiSn) and other plug materials.



  • Continuous mechanical barrier verification monitoring
  • Long-term well suspension monitoring
  • Pre-abandonment well plugging integrity monitoring
  • Temporary zonal isolation monitoring


  • Positive confirmation of barrier integrity
  • Cost-effective compliance with statutory well monitoring requirements