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1. Introduction to chemical mud
Chinese name: chemical mud
Alias: polymer mud, solid-free mud
Appearance: white powder 
Smell: tasteless
Thermal stability: easy to decompose when the temperature exceeds 100 degrees
Solubility: soluble in water, almost insoluble in organic solvents, such as benzene, ethanol, esters, etc., only soluble in ethylene glycol, glycerin, lactic acid, acrylic acid
Corrosion: non-corrosive
Hygroscopicity: solids are hygroscopic
Physical and chemical properties of chemical mud:
Xinyuan polymer mud chemical mud is a polyelectrolyte artificially synthesized based on a variety of monomers or copolymers. It is an organic polymer material. Common chemical mud products are divided into solid and liquid. The solid form is divided into granular and powder form, and the liquid form is mainly inverse emulsion material. According to the dissolution rate, it is divided into ordinary type and instant dissolution. 
After fully dissolved in water, the chemical mud becomes a translucent paste, with high viscosity and strong penetration ability, which can effectively adjust the rheology of the mud liquid. The speed of drilling cuttings depositing in the hole is very fast. With a thin transparent paste-like protective layer, the advantages of chemical mud are to increase the drilling speed, prevent the leakage and the collapse of the hole wall, and maintain the rules of the well diameter.
Second, the use of chemical mud (for rotary drilling rig construction)
At present, the chemical mud is used more in the construction of the rotary drilling rig, and the quality is stable. It is commonly used at home and abroad. The following uses the chemical mud as an example to list the use methods.
1. The dosage and method of Xinyuan polymer mud use: 0.1 ‰ –1 ‰ kg / m3 water (according to soil conditions, construction aperture, construction length can be increased or decreased as appropriate); evenly sprinkle under stirring conditions, No agglomeration or agglomeration. 
Formula of chemical mud according to formation characteristics
Under normal circumstances, the proportion is prepared according to 0.01% ~ 0.1%, and the proportion is determined according to the on-site field test. Reference indicators: as follows
Formation status Neptune mud (kg / cubic water) Viscosity (sec) Clay and shale 0.2-0.618-30 silt, fine to medium sand 0.3-0.720-32 coarse sand, smaller gravel 0.4-0.926-35 pebbles 0.5- 1.135-45
2. Water quality requirements: no impurities in the water.
3. Water dissolution time: the ordinary chemical mud dissolves no less than 1 hour, and the air-blowing of the air compressor in the mud tank or the circulating pump circulating slurry method should be adopted; the dissolution time of the instant chemical mud is not less than 5 minutes, generally directly In the pulping method, the slurry in the mud pool can also be used.
4. Characteristics: White granule powder, water-soluble polymer, because its molecular chain contains a certain amount of polar (positive) groups, it can accelerate the settlement of drilling cuttings in the mud, and has a very obvious effect of treating sediment ; Can improve mud viscosity and inhibit mudstone expansion; chemical mud molecules can better surround clay particles, strong permeability, good wall protection effect, small amount of sediment.
Product packaging: 
The product packaging is a woven bag lined with double-layer polyethylene plastic bag or a plastic kraft paper bag. The net weight of each bag is 1kg and 25kg.
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