Experimental study of erosion resistant materials for use in diverter components
Conference
·
OSTI ID:191944
A diverter is a safety device used on oil and gas drilling rigs as a means of handling shallow gas flow. A common mode of failure of the diverter is erosion of the bends in the surface vent lines that divert the flow away from the rig. The objectives of the study carried out at Louisiana State University (LSU) were to identify new or alternate materials that are more resistant to sand erosion than those that are currently being used in the field, thereby enhancing diverter system operational safety; and to obtain sufficient experimental data to allow estimation of life of a component that is used to make a bend in a diverter system. Work done includes experiments on low carbon steel flat plates and various other erosion resistant materials, maintaining sonic velocity of the carrier fluid. Study of the effects of various parameters such as angle of impact and rate of sand flow on the erosion rates of these materials was also carried out. Low carbon steel of A-36 specifications had the maximum erosion rate when blasted with sand grain size of US mesh No. 80-120 at an impact angle of thirty degrees. Stellite 6K showed the least erosion rate among the materials tested under similar conditions. When the angle of impact was changed to ninety degrees, keeping all the other parameters same as before, low carbon A-36 steel showed the maximum erosion rate once again and the performance of stellite 6K remained near the best of the materials tested. Comparison of the erosion performance of these materials at different angles indicates that erosion is a greater problem at angles lower than ninety degrees. It was found that the life of a diverter component could be increased by almost 100% if it is coated with stellite 6K over the use of uncoated low carbon A-36 steel.
- OSTI ID:
- 191944
- Report Number(s):
- CONF-951002--
- Country of Publication:
- United States
- Language:
- English
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