Principle and Benefits of Cleaning Wells with Sodium Pyrophosphate

sodium pyrophosphate [ Na 4P 2O 7 10H 2O ] is a kind of agricultural chemical fertilizer. White powder. It is easily soluble in water, and after dissolving in water, it has a lubricating feeling, is alkaline, and has a strong washing effect. It can reduce water solubility and can be complexed with Ca2+ and Mg2+ ions in mud. During the well flushing process, the pore wall is soft and expanded due to the penetration of sodium pyrophosphate solution to the mud skin on the pore wall and the ion complexation of Ca+2 and Mg2+, which weakens the binding force between mud skin particles. Under the action of dispersion, it becomes a suspension, and through the repeated oscillation of compressed air of the flushing piston air compressor, the sodium pyrophosphate solution is fully contacted with the mud skin on the hole wall, and the suspension is finally removed from the hole to achieve the purpose of flushing the well. Compared with several well flushing methods at present, it has the following advantages:
1. It can dissolve the mud skin on the hole wall and solve the difficulties caused by flushing with small mud adhesion.
2, can increase the water yield of drilling.
3. Flushing well is cheap and easy to supply.

	4. The technological process is simple and easy to master without adding other equipment.