2results about How to "Reduce pumping pressure" patented technology

This invention relates to the field of slickwater technology, specifically to a high-efficiency proppant-carrying slickwater. It comprises a shear-responsive smart thickener and inorganic salts dispersed in an aqueous phase; the smart thickener is composed of ABA-type temperature-ion dual-responsive block copolymers and nano-silica particles with surface-grafted hydrophobic alkyl chains and cationic groups. The slickwater of this invention exhibits ultra-low viscosity and high drag reduction during the pumping stage (low temperature, high shear); upon entering a fracture, the synergistic effect of temperature rise and instantaneous high-speed shear triggers hydrophobic association of the copolymer and interweaving of the nanoparticles, forming a three-dimensional network structure; under the low-shear environment within the fracture, the network structure self-reinforces through ordered reconstruction of ion pairs, achieving high-viscosity proppant carrying. Its core lies in transforming the inherent temperature rise and shear effects of the process into a driving force for constructing a proppant-carrying network, thereby effectively resolving the contradiction between low-friction pumping and high proppant carrying capacity in slickwater volumetric fracturing and significantly reducing reservoir damage.

The application discloses a shotcrete rebound-reducing agent and a preparation method thereof. The shotcrete rebound-reducing agent is prepared from the following raw materials in mass percentage: 15-30% of a quick-setting component, 2-5% of a viscosity-increasing component, 10-15% of a reinforcing component, 2-5% of an anti-freezing component, 1-4% of a stabilizer, and the rest of water; and the viscosity-increasing component is a combination of polyvinylpyrrolidone and modified carboxymethyl cellulose. The prepared shotcrete rebound-reducing agent has the advantages of good sprayability, high hourly strength, good anti-freezing and stability, and the like, can improve the working performance of shotcrete, reduce the content of a quick-setting agent and significantly reduce the rebound rate of shotcrete, and has good economic benefits.