Why Need Sodium Hexametaphosphate In Oil Drilling?

We all know that there will be a variety of oil and mud in the oil field, as well as sand and gravel, in order to ensure the safety of drilling operations and provide drilling efficiency, additives will be used to wash the well. The purpose of well washing is mainly to drain the material out of the well through the outlet medium of the co-construction equipment. Why do we need sodium hexametaphosphate in oil drilling?

In the process of  well washing, modern science and technology are used to wash the well through special processes, so the working principle of the whole process is:

(1) Add a certain proportion of sodium hexametaphosphate to the water. The prepared well washing fluid is weakly acidic and acid-base neutral, which reduces the PH value of the mud and weakens the stability.

(2) The liquid tension is reduced, and sodium hexametaphosphate can ensure that the aqueous solution can penetrate well into the rock cracks, effectively contact with the mud and the filling clay in the cracks, and the corrosion of the drilling tool is very weak.

(3) Dispersion mud, due to the electronegativity of the clay surface, when the phosphate of sodium hmetaphosphate is adsorbed to the clay surface, the electronegativity of the clay surface is enhanced, so that the repulsion force between clay particles is significantly increased. At the same time, the polymerized macromolecules carry a large water film, which effectively enhances the hydration of clay particles. As the hydration film of the clay particles thickens, the clay particles disperse and effectively destroy the mud skin of the well wall.

(4) It has a complexing effect on clay. Sodium hmetaphosphate is complexed with calcium and magnesium ions in clay to produce water-soluble complex, so the complexation reduces the concentration of calcium and magnesium ions, and the water-soluble complex is not easy to coalescate and precipitate, and is easily discharged out of the hole in the washing well.

The main components of the chemical mud used in drilling are clay powder, soda ash, polyacrylonitrile amine salt, potassium humate, potassium polyacrylamide salt and so on. According to the calculation, the sodium hempetaphosphate washing fluid becomes a suspension under the action of dispersion. After repeated oscillation of the compressed air of the piston type air compressor, the sodium hempetaphosphate solution fully contacts and acts repeatedly with the mud skin of the hole wall, and finally the suspension is removed from the hole to achieve the purpose of well washing.

Henan Zhenglin New Material Co. , LTD. is located in Zhengzhou High-tech Industrial Development Zone. It is a high-tech environmental protection enterprise integrating R&D, production, sales and application technology services. It is committed to providing customers with high- quality water treatment chemicals,phosphate chemical products and so on. Orientation solution. The company has a group of professional and technical personnel engaged in chemical technology, who can fully simulate the user' s circulating water treatment system, and provide parameters, provide customers with formula screening, technical solution design, etc. , the company will continue to work hard to provide customers with better products and service.

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