摘要
可打捞分段压裂滑套可在分段压裂作业后通过油管或连续油管下入专用打捞工具将各级滑套内部可打捞式球座一次性提出井口,实现管内全通径,便于后期下入工具进行二次改造或滑套开关。文章分析了可打捞分段压裂滑套球座打捞关键技术,设计高承载打捞机构、球座弹性分离机构、球座旁通循环冲洗机构、大间隙密封机构等关键结构,地面试验和入井试验表明滑套球座可顺利提出,验证了打捞的可靠性。
The retrivable ball seats inside the sliding sleeves of multiple stages can be fished by special fishing tool in one trip through the tubing or coiled tubing after fracturing,to achieve the full diameter pipe string. Then tools can be run downhole for subsequent stimulation or sleeve opening/closing. The key processes fishing ball seats are analyzed,high-load fishing mechanism,elastic ball seat release mechanism,the bypass circulation/flushing mechanism for the ball seat,the large gap sealing mechanism are designed. The ground test and well test results show that the ball seats can be successfully pulled out,the fishing is proven reliable.
出处
《钻采工艺》
北大核心
2017年第4期78-81,共4页
Drilling & Production Technology
基金
国家科技重大专项下属专题"分支水平井压裂采气关键工具研制与应用"(编号:2016ZX05048-002-07)
中国石化科技部攻关项目"免钻全通径开关滑套分段压裂技术研究"(编号:P14115)部分研究内容
关键词
分段压裂
滑套
球座可打捞
全通径
关键结构
staged fracturing
sliding sleeve
retrievable ball seat
full diameter
key structure
