Abstract: The invention provides a method and device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method comprises: determining the loading and unloading rates of the hardened cement; determining the maximum loading on the hardened cement; determining the experimental temperature and the experimental pressure of the hardened cement; establishing a stress-strain curve for the hardened cement; and describing the elasticity of the hardened cement with the degree of strain recovery of the hardened cement in different cycles, and describing the mechanic integrity of the hardened cement with the degree of damage to the hardened cement in different cycles. The invention further provides a device for measuring the elasticity of hardened cement for cementing of oil-gas wells.

Abstract: The present disclosure discloses a CO2 quantitative fluorescent sensing material, a preparation method and an application thereof. The preparation method for the CO2 quantitative fluorescent sensing material includes dissolving 9,10-diacrylic anthracene in a solvent to prepare 5-10 mg/mL of a first solution; dissolving MnCl2 or Mn(ClO4)2 in water to prepare 50-100 mg/mL of a second solution; mixing the first solution and the second solution; adding a diluted acid into the mixed solution; sealing and heating the mixed solution. This preparation method is simple. During application, an ionic liquid produced by a reaction of CO2 gas and an amine compound improves an aggregation-induced emission of the CO2 quantitative fluorescent sensing material and a fluorescence thereof is significantly improved. So that a fluorescent CO2 quantification is performed rapidly and accurately.

Abstract: The invention provides a method and device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method comprises: determining the loading and unloading rates of the hardened cement; determining the maximum loading on the hardened cement; determining the experimental temperature and the experimental pressure of the hardened cement; establishing a stress-strain curve for the hardened cement; and describing the elasticity of the hardened cement with the degree of strain recovery of the hardened cement in different cycles, and describing the mechanic integrity of the hardened cement with the degree of damage to the hardened cement in different cycles. The invention further provides a device for measuring the elasticity of hardened cement for cementing of oil-gas wells.

Abstract: The present disclosure discloses a reversible continuous variable chromogenic material, a preparation method as well as an application thereof. The present disclosure relates to a field of chromogenic material. The reversible continuous variable chromogenic material crystallizes in a trigonal R3 space group. A fundamental asymmetric unit includes two 9,10-diacrylate anthracene ligands, two Mn2+ and ? ?-O. A plurality of fundamental asymmetric units connect with each other and form a three dimensional infinite network structure. This material is a chromogenic metal-organic framework which performs continuous variable fluorescence color in a wide color gamut. A preparation technology for this reversible continuous variable chromogenic material is facile.

Abstract: The present disclosure discloses a CO2 quantitative fluorescent sensing material, a preparation method and an application thereof. The preparation method for the CO2 quantitative fluorescent sensing material includes dissolving 9,10-diacrylic anthracene in a solvent to prepare 5-10 mg/mL of a first solution; dissolving MnCl2 or Mn(ClO4)2 in water to prepare 50-100 mg/mL of a second solution; mixing the first solution and the second solution; adding a diluted acid into the mixed solution; sealing and heating the mixed solution. This preparation method is simple. During application, an ionic liquid produced by a reaction of CO2 gas and an amine compound improves an aggregation-induced emission of the CO2 quantitative fluorescent sensing material and a fluorescence thereof is significantly improved. So that a fluorescent CO2 quantification is performed rapidly and accurately.