A propellant deflagration test was performed to verify that the burning of propellants occurred outside the gun barrier and wellbore. This test confirms that ReCo™ Cap is carried into the formation before releasing secondary energy.

A test was configured to verify that propellant was displaced outside the gun carrier and well-bore casing before deflagration. The test setup included an 11.8 in. height tempered glass container filled with water and a test jig set up to simulate the gun carrier and casing with the composite charge (Figure 1). A high-speed camera (50,000 frames/sec) focused on the glass container was positioned at 26 ft. behind a steel protective plate (Figure 2). The test jig with shaped charge and ReCo™ Cap was positioned on top of the water-filled glass container and detonated.

The photographs of the perforation event (Figure 3) show that the tip of the shaped charge jet penetrates the steel casing and continues to the bottom of the water-filled container at 20 µs (consistent with distance and shaped charge jet velocity). The propellant appears in the glass container at 40 µs and continues to deflagrate in the fluid column over the next 300 µs. These images confirm that the propellant was displaced past the gun carrier and well-bore casing before deflagration.

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