冷冻暂堵带压换阀技术及应用前景  

Technology of hot-tapping,valve drilling,and freezing and its application prospects

作　　者：黄桢[1,2] 王锐[2] 杜娟[3] 

机构地区：[1]重庆大学资源与环境学院博士后流动站 [2]中国石油西南油气田公司川东开发公司 [3]中国石油西南油气田公司重庆气矿

出　　处：《天然气工业》2009年第2期79-80,83,共3页Natural Gas Industry

基　　金：国家自然科学基金项目(编号:50674077)的资助

摘　　要：为了安全地解决井口隐患,在川东沙罐坪气田罐31井首次采用四川油气灭火中心引进的最新技术——冷冻暂堵技术来实施暂堵带压换阀。该技术是将特殊的暂堵剂逐层注入各层套管环空和油管内部,冷冻后可同时将各环空和油管水眼暂堵,达到以不压井方式来更换井口1、2、3号闸阀的目的。此项技术在国内属首次成功应用,并且为保护油气层而需要进行带压整改井口又找到了一项新的技术途径。To safely remove the wellhead hazards,the freezing technology was adopted for the first time by Sichuan Oil/Gas Well Firefighting Center on the well Guan-31 at Shaguanping gas field in east Sichuan basin to change valves under pressure.By this technology,a special blocking agent was injected into casing annulus and inside the tubing.After the agent frozen,the annulus and the nozzle of the tubing were blocked.Then the gate valves #1,#2,#3 were changed without killing the well.This was the first application of this technology in China.It provides a new way to repair the wellhead under pressure meanwhile providing reservoir protection.

关 键 词：冷冻 暂堵 带压 套管 油管 修井 完井 

分 类 号：TE358[石油与天然气工程—油气田开发工程]