【Major Equipment in the Chemical Engineering Sector】348 – Large-diameter coiled tubing welding and inspection technologies
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This post was last edited by Desert Fish on 2022-6-15 at 22:17. On June 10, China National Petroleum Baji Petroleum Pipe Co., Ltd. (hereinafter referred to as Baji Pipe) received a \"Product Application Certificate\" from Chuanqing Drilling Changqing Downhole Technology Operation Company, which gave full recognition to Baji Pipe’s capabilities in providing services related to the welding and testing of large-diameter coiled tubing. This technical service has set a new record for the largest-scale coiling tubing butt welding inspection service in China, marking a new breakthrough in China National Petroleum Corporation’s technologies for coiling tubing butt welding and inspection.
In recent years, with increased efforts to develop unconventional oil and gas resources such as tight oil, tight gas, and shale gas, the use of coiled tubing for drilling in wells deeper than 7,000 meters, ultra-deep wells, and highly deviated horizontal wells has become common. However, due to constraints such as height and width limits during transportation, the length of single coils of coiled tubing with a diameter of over 50.8 millimeters fails to meet the requirements of on-site operations. This poses higher demands on coiled tubing welding and inspection technologies. “Coiling tube butt welding and inspection technologies involve measures such as tube body inspection and tubing butt welding to repair damaged coiling tubes and extend their service life. They can effectively address issues related to the repair of coiling tubes in field operations, as well as the need to lengthen tubes of shorter lengths due to transportation constraints. These technologies represent one effective way to improve the utilization rate of pipes and maximize benefits for users. ”Zhao Jianlong, manager of Baoji Steel Pipe Coiled Tubing Oilfield Engineering Services Company, said. In line with customer requirements, Baoji Steel Pipe has continued to intensify its research and development efforts in core technologies such as coiling pipe butt welding and inspection. It has gradually resolved technical challenges including softening of the heat-affected zone in coiling pipe ring welds, pre-welding alignment, and control of weld morphology. The company has made breakthroughs in key areas such as welding methods, joint design, wire selection, pipe end alignment, heat-affected zone control, and post-weld inspection. It has developed a coiling pipe butt welding process that meets API Spec 5ST standards, and has established a standard for coiling pipe butt welding; the performance of the pipes after welding reaches advanced levels both domestically and internationally.
【Major Industrial Equipment in the Chemical Industry】347 – The First Domestic Deep-Sea Subsea Christmas Tree https://bbs.hcbbs.com/thread-3358141-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Forum Website)
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