Principle of washing wells with sodium hexametaphosphate

The main components of chemical mud used in drilling are clay powder, soda ash, polyacrylonitrile amine salt, potassium humate, polyacrylamide potassium salt, etc. Clay powder and soda ash are essential. The mud skin is mainly composed of clay powder, and soda ash determines the PH value of mud to be 8 ~ 9, which is weakly alkaline. The mixing of clay powder and soda ash has a stabilizing effect.

( 1 ) Flushing fluid prepared by adding a certain proportion of [ Napo3 ] 6 into water is weak acid and neutralized with acid and alkali, which reduces the PH value of mud and weakens its stability.

( 2 ) Sodium hexametaphosphate reduces the liquid tension, which can ensure that the aqueous solution can well penetrate into rock fissures, effectively contact with mud skin and filled clay in fissures, and has very weak corrosion to drilling tools.

( 3 ) Sodium hexametaphosphate dispersion slurry, because the clay surface is negatively charged, when the phosphate radical of sodium hexametaphosphate is adsorbed to the clay surface, the negatively charged property of the clay surface is enhanced, thus significantly improving the repulsive force between clay particles. At the same time, the polymeric macromolecules are provided with a large water film, which effectively enhances the hydration of the clay particles. As the hydration film of clay particles thickens, the clay particles disperse, effectively destroying the mud skin of the borehole wall.

yucai chemical Factory specializes in the production of: sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, industrial phosphoric acid, trisodium phosphate, aluminum dihydrogen phosphate, solid aluminum dihydrogen phosphate, liquid aluminum dihydrogen phosphate, sodium dihydrogen phosphate and other phosphate series. After more than 30 years of continuous pursuit and development, Yucai Phosphate has est

ablished a good cooperation and sharing relationship with many colleges and universities through skilled chemical technology and product development, equipment renewal, and has established a brand name ( Yucai Phosphate ) in the chemical industry.