Effect of rubber particles and fibers on the dynamic compressive behavior of novel ultra-lightweight cement composites: Numerical simulations and metamodeling

Key technology for drilling and completing long open-hole horizontal wells in Yanchang oilfield

“…(2) Long open-hole horizontal well elasticity cement slurry system Most of the horizontal wells developed in the western part of the Yanchang oilfield were completed by casing perforation completion technology was implemented to make it possible to obtain economic value from low permeability wells that originally had low or no oil output, which greatly extended the LOE (Limit Of Exploitation). To meet the needs of perforation and fracturing, the seal integrity of cementite was improved by adding modified rubber powder and fibers to the cement slurry [19] . The experimental data are presented in Table 5 and Table 6, and the base slurry was: cement+1.5% non-permeable filtrate reducer+2% expansive agent+2% YC-F+1.5% YC-H+42% water with a density of 1.90 g/cm 3 .…”

Numerical-based analytical model of double-layer steel-LHDCC sandwich composites under punching loads

“…The compressive cube strength of concrete is obtained by multiplying the cylinder strength with the factor of 1.25. Due to the bridging effect provided by the PE fibers, the tensile stress-strain relationship of the LHDCC exhibits an excellent ductile behavior with a long stage of strain hardening, which is around 3%~4% tensile strain and qualified as an Engineering Cement Composite (ECC) material [37,38]. However, the PE fibers have marginal influences on the compressive behavior of the LHDCC.…”

An application of FEA and machine learning for the prediction and optimisation of casing buckling and deformation responses in shale gas wells in an in-situ operation

“…Besides, a new study by Huang et al (2020) on rubberise cement established that; the rubberise cement absorb micro expansion and shrinkage, which reduces the brittleness of the concrete and improves its deformation performance.…”