"Deep Cryogenic Tempering (DCT) is a specialized processwhereby the molecular structure of a material is “re-trained” through cooling to –300º F and then heating to +175-1100º F. Three Shannon Formation wells were selected (TD about 500 ft) based on their proclivity for high component wear rates.
Phase 1 of the test involved operation for a nominal 120 calendar day period with standard, non-treated components. In Phase 2, treated components were installed andoperated for another nominal 120 calendar day period. Different cryogenic treatmentprofiles were used for components in each well. Rod pumps (two treated and oneuntreated) were not changed between test phases. One well was operated in pumped-offcondition, resulting in abnormal wear and disqualification from the test. Testing showsthat cryogenic treatment reduced wear of rods, couplers, and pump barrels. Testing ofproduction tubing produced mixed results."
Source: http://www.osti.gov/bridge/servlets/purl/794381-1aya1J/native/794381.pdf
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