... of the FBJ was greater than 73% and 28% of the FBJ was matrix. Moreover, cement permeameter tests indicated that the permeability of the FBJ was just 0.0109 mD (1 mD ≈ 1 × 10⁻¹² cm²). All of these results show that the formulated FBJ has acceptable properties for oil/gas wells cementing...

... by Fourier transform infrared spectrometer, transmission electron microscope, thermo-gravimetric analysis and other means. Then the latex was employed to prepare polymer latex modified oil-well cement, and the influence of the latex on the basic properties of cement slurry, mechanical properties...

...Zhi-gang Peng; Chun-yang Yu; Qian Feng; Yong Zheng; Jin-hua Huo; Jia-rong Wu Microcracks can occur in oil well cement, which can lead to regional isolation and casing corrosion or even serious damage to the well. Self-healing cement is therefore of great interest for oil well applications...

..., with the latex particles exhibiting a typical core–shell structure. Its performance as an oil-well cement was also evaluated. The results showed that the XY-5–cement slurry has good temperature resistance, salt resistance, low water loss and low permeability. Furthermore, the use of XY-5 effectively improved...

...João Silva; Neil B. Milestone The lifetime of a geothermal well is strongly dependent on the long-term performance of the cement used for its construction. The critical zones in well cements are the outermost layers, where the cement encounters either the steel casing or the rock formation...

... on grade G oil well cement, which is widely used in various cementing operations, and microfine cement, which is playing an increasingly important role as a reinforcing material, especially in the field of low-temperature cementing. The initial hydration process of the cement slurry systems...

...) and sodium p-styrene sulfonate (SSS) as anionic copolymer emulsifiers, and used as a novel temperature-resistant fluid loss reducer for oil well cement. The influence of the anionic copolymer emulsifier on the properties of the polymer microspheres was assessed and the fluid loss performance of cement...

.../radioactive waste retardation well cements The disposal of high- and intermediate-level radioactive waste in the UK will be by co-disposal in a mined repository a few hundred metres deep known as a geological disposal facility (GDF). Deep borehole disposal (DBD) provides a potentially superior...

... strength recoveries were generally associated with the formation of large, long cracks. For well cements, geothermal environments are among the most aggressive in terms of mechanical and chemical stresses, causing unavoidable concerns over short- and long-term cement sheath integrity. Cement failure...

... oil well cement that use organic retarders, but their presence may increase the solubility of any radionuclides released from the waste packages. New DBD grout formulations using sodium phosphate and sodium borate as inorganic retarders are reported in this paper. To place the wet grout, the onset...

... degradation temperature is higher than 440°C. An experiment investigating the effect of FL on the comprehensive performance of oil well cement slurry shows that filter loss can be controlled within 50 ml when the dosage of FL is 1·0% of the total mass of cement and quartz powder under the ultra-high...