Development of temperature- and salt-resistant viscosifier with dual skeleton structure of microcrosslinking and hydrophobic association structures and its application in water-based drilling fluids

Influence of Alkyl Chain Length on the Performance of Inverse Emulsion Polyacrylamide Fracturing Fluid Thickeners

“…4.70 ppm is the signal peak for D 2 O, 1.70 and 2.30 ppm are the proton signals of −CH 2 – and −CH– on the main chain . The peak at 1.60 ppm was attributed to the proton peak of the methyl group in the −C–(CH 3 ) 2 structure on AMPS . 2.80 ppm is the peak corresponding to the sulfonic acid group attached to −CH 2 in AMPS .…”

“…39 The peak at 1.60 ppm was attributed to the proton peak of the methyl group in the −C−(CH 3 ) 2 structure on AMPS. 30 2.80 ppm is the peak corresponding to the sulfonic acid group attached to −CH 2 in AMPS. 45 Through the comparison of NMR spectra, it can be found that, compared with the spectrum of PAM, there is an obvious peak at 1.30 in the ordinary PAM-Cn, which is the −CH 2 − long chain in the hydrophobic monomer, so it indicates that there is a hydrophobic long chain in PAM-Cn, and the combination of infrared, the mean square radius of gyration, and A 2 results indicates that the target product is successfully synthesized.…”

“…Hydrophobic modified polymers are used in a variety of applications, such as hydrophobically modified polymers to enhance recovery, 28,29 and hydrophobic associated polymers for drilling fluids. 30 Hydrophobic monomers are commonly employed across various fields to enhance product rheological properties. This method involves modifying the interaction forces between molecules and enhancing polymer rheological properties by establishing a three-dimensional network structure through the association of hydrophobic monomers.…”

“…Hydrophobic modified polymers are used in a variety of applications, such as hydrophobically modified polymers to enhance recovery, , and hydrophobic associated polymers for drilling fluids . Hydrophobic monomers are commonly employed across various fields to enhance product rheological properties.…”

Preferred Ratio and Properties of Microfoam Drilling Fluid for Gas Extraction in Soft Coal Seams

“…At the same time, the anti-oil pollution experiment indicated that SBX had good antipollution ability to crude oil when the crude oil concentration was less than 15%. Dong et al investigated the synthesis of a temperature- and salt-resistant thickener (DASL) with microcrosslinked and hydrophobically linked double-skeleton structure using N , N -dimethylacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, sodium p -styrenesulfonate, and lauryl methacrylate as monomers . This study showed that the polymer with microcrosslinked and hydrophobically linked biskeleton structure has good application as a temperature- and salt-resistant thickener for water-based drilling fluids.…”