the result showed that the dimension control, residual stress and collapse resistance of erw casing made in china is much better than that of seamless casing.
结果表明,国产erw套管在几何尺寸、残余应力及抗挤强度等方面和无缝套管相比有较大的优势。
erw casing is applicated widely in oil and gas industry and substituted for seamless tubing for its high precision, excellent properties, easy controlling of quality and low cost etc.