Measurement of Thread Standoff of Oil Casing

A study is made on the problem that in case of measuring the thread standoff of one given piece of oil casing with more than one working gauges,there exists certain dispersion.Causes responsible for the said dispersion are identified.Getting these causes eliminated will not only enhance the exchangeability of the working gauges,improve the measurement accuracy and consistency of casing thread standoff and ensure product quality,but also increase economic benefit of the manufacturer.