【摘要】 目前煤炭地下气化技术已基本成熟,但工艺工具本身的影响导致其产业化进展缓慢。为此,介绍了2种新型煤炭地下气化连续管气化剂注入工具并进行了现场试验。试验结果表明:2种UCG气化剂注入工具通过井下测温和地面监控联合工作,解决了注入点不受控制的问题;通过设计防回火装置,解决了工具被回火烧毁问题;针对低压降要求,对工具内气化剂流道结构进行了设计优化,使工具压降不大于0. 5 MPa,装备系统压降不大于3 MPa;工具整体具有低压降、耐高温、防回火和防烧毁等功能特性,满足了现场需求,是国内煤炭地下气化技术设备研制的一项新成果。该工具的研制成功可为新一代煤炭地下气化技术的开发提供技术借鉴。更多还原

【Abstract】 The underground coal gasification( UCG) technology is basically mature,but the influence of its own process and tools slows down its industrialization progress. This paper introduced the development and field test of two new UCG coiled-tubing gasification agent injection tools. The test results show that these two kinds of UCG gasification agent injection tools ensure the injection point under control by conducting downhole temperature measurement and surface monitoring jointly. The problem that the tool is burnt by the backfire is solved by designing a backfire prevention device. To realize low pressure drop,the gasification agent flow channel inside the tool is designed optimally to keep the tool pressure drop not higher than 0. 5 MPa and the system pressure drop not higher than 3 MPa. The tool overall has the parameter and functional characteristics of low pressure drop,high temperature resistance,backfire prevention and anti burning to satisfy the demand of field test. This technology is a new domestic achievement in the development of UCG technology and equipment. The research conclusions can provide the technical reference for developing a new generation of UCG technology.更多还原