Q Q: 506615608
Well washing is a key process of well completion technology. In engineering construction, geothermal wells usually have to go through simple or complex well flushing technology, and use a variety of well flushing methods. Under special circumstances, a well washing method is repeatedly used to make the water quantity and temperature of geothermal well meet the requirements of design or contract indicators, and try to achieve the best water quantity and temperature at the same time. The quality of the project is qualified. After pumping test and water sample test, it passes the water quantity and water quality inspection.
Compressed air well flushing is a common method, which requires air compressor to provide compressed air (positive and negative circulation), vibrate and pump internal flushing fluid, dredge cracks and remove sediment.空压机洗井装置有并列式和同心式两种,可视况选用。此乃借助空压机的风压,使孔内水位产生振荡,冲击井管,破坏泥皮,并将孔底沉淀物一并排出地面。空压机洗井是常用的洗井方法之一。在通常的情况下,其洗井效果较好。
There are two kinds of air compressor well washing devices, parallel type and concentric type, which can be selected according to the actual situation. With the help of the air pressure of the air compressor, the water level in the hole oscillates, the well pipe is impacted, the mud skin is damaged, and the sediment at the bottom of the hole is discharged from the ground. Air compressor well flushing is one of the common well flushing methods. In general, the effect of well flushing is better.
In the same well, the free suspension velocity of cuttings with the same diameter is different due to different well washing methods (different upward return channels of well washing fluid). When using the same air compressor to wash the well, the cuttings discharge capacity of reverse circulation is stronger than that of positive circulation, and the cuttings discharged are larger than that of positive circulation.
The fluctuation amplitude of water column in the well can reach several hundred meters, and the instantaneous release of water column pressure of several hundred meters is helpful to dredge the aquifer. According to the ratio of the duration of water production to the interruption time, the water production capacity of geothermal wells can be estimated. After the completion of compressed air well flushing, the water pump is generally used for well flushing test.
A four stage pressurized high pressure air compressor with a flow rate of 10 cubic meters per minute and a very high pressure of 25 MPA can push a water column more than 2000 meters deep out of the ground. Negative pressure is formed in the well in a moment, so that the water in the formation can be washed out naturally, which can effectively improve the well washing speed.