1.25" Burst Gauge
Capture the pressure signature from a perforation event, at a rate of 32,000 samples per second.
High-speed downhole pressure data sampling used to capture and verify dynamic underbalanced perforating events. Laboratory perforation charge samples are tested and a resulting pressure signature can be confirmed downhole using the DataCan Burst gauge.
More information on dynamic underbalanced perforating with high-speed pressure gauges can be found here:
The Burst Gauge is conceptually two gauges in one. One section of the gauge circuit is sampling downhole pressure at regular 1-second intervals. The second section is sampling at 32,000 samples per second. Because we don't have enough memory at this high speed, the circuit continuously dumps the high-speed data. As the data enters the memory we evaluate the data and look for a perforating event. Either a maximum set-point or a pre-programmed change in pressure over time defines the event. Upon recognizing that an event has occurred the data stored in the memories buffer is stored along with the following 15 seconds of high-speed event data. The Burst gauge has the ability to capture up to 8 high-speed events. After retrieving the downhole pressure gauge, the 1-second sampling data is overlayed over the high-speed data into one graph.
Extreme shock reliability is required as the Burst Gauge is located directly below the perforating guns. In order to capture the high-speed event, the Burst gauge must be able to withstand the extreme shock from the perforation explosion. Using the DataCan shock mitigator will dampen the shock to the tool. The design of the tool is critical in all aspects, welded rugged sensors, sour service metallurgy, high-pressure seal solutions, rugged and shock-mounted circuits, and specifically packaged power sources are required to withstand the environment. Couple that with easy to use software and non-volatile too memory to ensure data collection is guaranteed.