免钻型大通径桥塞研制与应用现状

摘要

Staged fracturing of plug-and-perforate is the main technical mean for shale gas develop-ment at home and abroad.In order to ensure the smooth flow of oil and gas in later stage, we needto drill bridge plug using coiled tubing milling tool.There are problems such as take longer,high cost,and easy to stick.Developing non drilling type bridge plug with large internal diameter to re-place composite plug can deal with the problems.The domestic and foreign development and ap-plication status of large internal diameter plug and introducing the structure,principle,technical features,specifications and performance parameters and field application are investigating.The main problems and development trend analyzed and suggestions on developing large internal diam-eter plug are given.%桥塞-射孔联作分段压裂是目前国内外进行页岩气开发所使用的主要技术。在该工艺的施工后期，为了保障油气畅通，需要利用连续油管磨铣工具钻除桥塞，存在耗时较长、成本较高、容易卡钻等问题。研制出免钻型大通径桥塞代替复合桥塞，可以解决这些问题。调研了国内外大通径桥塞的研制与应用现状，介绍了结构、工作原理、技术特点、规格性能参数及现场应用情况。分析了存在的主要问题及发展趋势。给出了大通径桥塞研制的建议。