The gap between the downhole vortex tool and the inner diameter of the tubing in the existing vortex gas well deliquification technology makes the gap area in the 73 mm tubing equivalent to the area of the 26. 6 mm nozzle, and the gas flowing through this area is not effectively utilized and influences the deliquification of normal vortex gas, which limits the application range. The sealed vortex gas well deliquification tool is installed on the sealed preset vortex gas well deliquification string by preset a sealing device. It can allow all the gas flow into the spiral body to carry water using the elastic device to seal the gap between the vortex gas well deliquification tool and the inner diameter of tubing. The field application of two wells showed a success rate of 100％, an effective efficiency of 100％, an average daily gas increase of 187. 1％, a cumulative gas production increase of 915456 m3, and an increased benefit of 2. 4019 million RMB. The technology expands the application range of vortex gas well deliquification technology, and provides an effective technical means for enhancing gas production.%现有涡流排水采气技术的井下涡流工具与油管内径之间存在着间隙,与73 mm油管内径间隙面积相当于26.6 mm油嘴面积,流经此面积的气体未被有效利用,并干扰其它正常涡流气体携水,限制了应用范围.密封式涡流排水采气技术通过预置密封装置,装在密封预置式涡流排水采气管柱上,采用弹性体密封涡流排水采气工具与油管内径之间的间隙,使气体完全进入螺旋体用来携水增气.现场两口井应用表明,该技术工艺成功率100％,有效率100％,平均日增气幅度187.1％,累计增气915 456 m3,创效240.19万元,增产效果显著.该技术扩大了涡流排水采气技术的应用范围,为油田增气上产提供了一项有效的技术手段.
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