vibration

The variables defining drill-bit performance cover a lot of ground. There is a lot of attention given to cutters studding diamond drill bits, but just as important are what is in the rest of the drillstring and the decisions made by the driller.

Vibration-induced fatigue failures of pipework smallbore connections result in elevated safety risks and costly interruptions to normal operations. A common cause is poor design. This article discusses design considerations to avoid these failures.

In gas applications with high-pressure drops and/or high-velocity gas flow, acoustic-induced vibration (AIV) occurs when very high sound levels are propagated in piping. This can induce fatigue cracking of the pipe and potentially catastrophic pipe failure.