可调水嘴内置到井下配水器中，测试仪器与配水器对接后， 采用边测边调的方式进行流量测试与调配。 通过地面仪器监视流量压力曲线，根据实时监测到的流量曲 线调整注水阀水嘴大小，直至达到配注流量，一次起下完成所有层段测试和调配。 反循环洗井时，油套环空打压，防蠕动密闭自锁封隔器解封，洗井液经油套环空一部分进入筛管与套管环空清洗，一部分对注水管柱与防砂管柱的环空进行清洗，最后洗井液经洗井阀进入中心管返至地面。

INTEGRATED LAYERED  WATER INJECTION STRING  FOR MEASUREMENT  AND ADJUSTMENT OF  BACKWASHING WELL

The adjustable water nozzle is built into the underground water distributor. After the test instrument is connected with the water distributor, the flow test and allocation are carried out by measuring and adjusting at the same time. Monitor the flow pressure curve through the ground instrument, adjust the water nozzle size of the water injection valve according to the real-time monitored flow curve until the injection distribution flow is reached, and complete the testing and allocation of all layers at one time. During reverse circulation well washing, the oil casing annulus is pressurized and the anti-creep closed self-locking packer is unsealed. Part of the well washing fluid enters the screen and casing annulus through the oil casing annulus for cleaning, and part of the annulus between the water injection string  and the sand control string is cleaned. Finally, the well washing fluid enters the central pipe through the well washing valve and returns to the ground.