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- W2091484080 abstract "The life expectancy of rotary seals in downhole motors depends on temperature generated by sliding friction as well as ambient temperature. Heat transfer calculations show that sliding friction can produce a significant rise in temperature across seal assemblies, great enough to deteriorate the seal material and cause premature failure. Thermal conductivities of seal materials and thicknesses of shaft, sleeve, and housing are major design factors influencing steady state temperature profiles across seal assemblies. In general, smaller dimensions and higher thermal conductivities allow the friction generated heat to dissipate at a lower temperature. A parameter study led to an improved rotary seal configuration which will significantly lower peak seal temperatures in downhole motors. The design will channel drilling mud near the sliding friction surface for better dissipation of the friction generated heat. Plans are being made to incorporate this improvement into the bearing seal test assembly. It is doubtful that seals made of Buna-N will perform successfully on downhole motors, even when used in the improved design. On the other hand, calculated maximum temperatures are within material limitations of Grafoil." @default.
- W2091484080 created "2016-06-24" @default.
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- W2091484080 date "1980-01-01" @default.
- W2091484080 modified "2023-09-27" @default.
- W2091484080 title "Factors affecting seal life in downhole motors" @default.
- W2091484080 cites W55694500 @default.
- W2091484080 doi "https://doi.org/10.2172/6883080" @default.
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