43 results about "SULFONATED PHENOL" patented technology

The present invention provides an ultra-high temperature salt-resistant drilling fluid for ultra-deep well and ultra-high temperature stratum drilling, and a preparation method thereof, wherein the ultra-high temperature salt-resistant drilling fluid comprises, by weight, 100 parts of water, 1-5 parts of clay, 0.3-6 parts of a filtrate loss reducer PFL-L, 0.3-6 parts of a filtrate loss reducer PFL-M, 0.3-6 parts of a filtrate loss reducer PFL-H, 2-8 parts of a sulfonated phenol formaldehyde resin, 2-8 parts of sulfonated lignite, 0.5-4 parts of a solid-phase chemical cleaning agent, 1-6 parts of a high temperature anti-collapse blocking agent, 1-6 parts of a lubricant, 0-35 parts of salt, 0.3-2 parts of a surfactant, 1.0-4 parts of a pH value adjusting agent, and 0-200 parts of a weighting agent. According to the present invention, the ultra-high temperature salt-resistant drilling fluid is not thickened at a high temperature of more than or equal to 240 DEG C, has easily-controlled rheology and low high-temperature and high-pressure filtrate loss, can be used for bottom hole drilling construction in the high temperature (more than or equal to 240 DEG C) and high salt (saturated salt) environments, and has the good application effect.

The invention discloses a deepwater drilling fluid. Every 1L of base slurry is composed of 1g of xanthan gum XC, 10-20g of sodium carboxymethyl cellulose, 20-30g of sulfonated phenol formaldehyde resin SMP-2, 30-50g of sodium silicate, 10g of polyvinylpyrrolidone PVP-K90, 15g of high modified asphalt KAHM, 50-100g of sodium chloride, 0.5g of sodium dodecyl benzene sulfonate, 0.5-1g of graphite and 0.2-0.5g of polyformaldehyde. The drilling fluid has the advantages of stable properties under cold conditions, favorable rheological behavior, high debris carrying capacity, excellent mud shale hydration expansion inhibition capacity, excellent hydrate generation inhibition capacity, low economic cost and small environmental pollution, and is especially suitable for deepwater drilling.

The invention discloses a method for preparing a high-temperature-resistant modified sulfonated phenolic resin for drilling fluid, which comprises the following steps: 1) adding phenolic reactants, aldehyde reactants and acid catalysts into a reaction kettle, mixing and stirring, React at 50-110°C for 10-400min; 2) Add alkali catalyst and aldehyde reactant to the reactor, keep the temperature between 50-110°C and add sulfonating agent in batches, react for 10-600min; 3) End of reaction Afterwards, the temperature is lowered and the material is discharged, and the product is obtained by spray drying. The temperature resistance of the modified sulfonated phenolic resin product prepared by the invention can reach 200°C. Under the aging condition of 200°C, the high-temperature and high-pressure filtration of the drilling fluid can be effectively reduced compared with the base slurry, and the salt resistance can reach 15% NaCl salt concentration. .