JP2-4煤层气井井筒煤粉煤块冲铣工艺  

Flushing Tech for Coal Powder and in Well Bore in JP2-4 Coal-Formation Gas Well

作　　者：徐克彬[1] 张桂敏[1] 贺铁柱[1] 杨丽娟[1] 

机构地区：[1]华北石油管理局井下作业公司,河北任丘062552

出　　处：《油气井测试》2008年第2期73-74,共2页Well Testing

摘　　要：由于煤层的坍塌破碎物是由大大小小的块状煤组成,现有的专业工具不能进行冲砂作业,为此,开发设计了镦击器和反循环镦击冲煤接头,既可以阻止大煤块堵塞通道,也可将大煤块撞击破碎成小碎块从油管中返到地面。该工艺在JP2-4井冲砂作业取得成功。Because of fragmentation blocks caused by coal layer collapsing are made up pieces of coal, available professional tool can't clean sand out. So the tamper and reverse circulating connection of tamping coal are designed which is either preventing big piece of coal to clog passage, or dashing on big piece of coal into small one returning to ground. This tech is success in cleaning sand out in JP2-4 well.

关 键 词：煤层气 煤块 冲铣 工艺 

分 类 号：TU832.21[建筑科学—供热、供燃气、通风及空调工程] P618.11[天文地球—矿床学]