HIGH-PERFORMANCE, CORROSION-RESISTANT AND ECONOMICAL COMPOSITE STEEL COILED TUBING AND MANUFACTURING METHOD THEREFOR

摘要

A high-performance, corrosion-resistant and economical composite steel coiled tubing and a manufacturing method therefor, the composite steel coiled tubing comprising: a metallurgically bonded base layer (1) and composite layer (2); the base layer (1) is a carbon steel or low alloy steel layer; the composite layer (2) is a corrosion-resistant alloy, such as stainless steel or a titanium alloy, the composite layer (2) being disposed at an inner surface or outer surface of the base layer (1). The manufacturing method therefor comprises: the processing of the base layer (1) and the composite layer (2), using high-temperature rolling to achieve the tight bonding of metallurgical layers of the base layer (1) and the composite layer (2), and using straight seam welding to form the composite steel coiled tubing. The manufactured composite steel coiled tubing is strong, has good plastic toughness, is corrosion resistant and is economical.