Switchable hydraulic jet fracturing underground device with combined slide sleeves

摘要: The invention relates to a switchable hydraulic jet fracturing underground device with combined slide sleeves. is provided multiple stages of jetting tools connected serially, the are hollow columns, and spray nozzle arranged on side wall each tool; comprise primary bottom lower portions upper located tools, first sleeves capable closing nozzles disposed in various can under effects external force, so that opened; second further spraying close force after completed by tools. After construction finished, guns be closed again via sleeves, when sand blockage accident occurs, reversely circulating well washing effect improved effectively.