Explosive decompression is a condition that occurs after an elastomer is exposed to a gas laden fluid in the presence of high pressure. The pressure compresses the gas and forces it into the interstices of the elastomer. While operating under the pressurized condition, no harmful effects are noted. The problem occurs when the system is rapidly depressurized. As the pressure outside the elastomer falls below that of the gas contained in the elastomer, the gas begins to expand and move toward the surface. If the differential between the internal pressure of the gas bubble and external pressure exceeds the bi-axial capability of the elastomer, a fracture or rupture will occur.
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Elastomer Test Specimen prior
to exposure to Gas Test. |
Elastomer Test Specimen showing
elastomer surface damage as a result
of Explosive Decompression (ED). |
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Cut-Away Section of Elastomer Test Specimen showing elastomer
surface damage as a result of Explosive Decompression. | |
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Steps in Explosive Decompression |
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Oil States Industries, Inc.
Oil States International, Inc.