低压井负压连续冲砂工艺技术研究与应用

针对目前国内冲砂技术存在因过多停泵造成井筒砂重新沉到井底造成二次危害、冲砂技术不能实现负压或负压不连续的问题,研究了低压井负压连续冲砂工艺技术。论述了该技术的工作原理、参数优化及工具设计等。通过现场试验证明,该技术可以实现连续负压冲砂,有效解决因为停泵造成井筒砂重新沉积的问题,具有很好的应用前景。

Research on Continuously Washed Sand Technology by Under-Balance Pressure for Low Pressure Well and Its Application

To problems of thewell bore sand sinkingtothe bottomto cause secondary damage because of stoppingthe pump toomanytimes forthe domestic technology at present and washed sand technology not achieving negative pressure or negative pressure discontinuity,washed sand tech under-balance pressure for low pressure well is studied.The working principle,parameter optimization and tool design of the technology are discussed.Through the field test proved that the technology can achieve a continuous negative pressure wa...