Mechanical Properties and Microstructure of Oil Well Cement Stone Reinforced with Potassium Titanate Whiskers

2018 ◽  
pp. 405-410
Author(s):  
Jiaming Yu ◽  
Ming Li ◽  
Xihui Hu ◽  
Jianhua Guo ◽  
Quan Cao
Keyword(s):  
Mechanical Properties ◽  
Cement Stone ◽  
Oil Well ◽  
Potassium Titanate ◽  
Oil Well Cement ◽  
Well Cement

Mechanical properties and microstructure of oil well cement stone enhanced with Tetra-needle like ZnO whiskers

2017 ◽  
Vol 135 ◽  
pp. 59-67 ◽  
Author(s):  
Ming Li ◽  
Shuang Deng ◽  
Yongjin Yu ◽  
Jianzhou Jin ◽  
Yujia Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cement Stone ◽  
Oil Well ◽  
Oil Well Cement ◽  
Well Cement

Mechanical Properties and Mechanism of Graphite Oxide Reinforced Oil Well Cement

2016 ◽  
Vol 847 ◽  
pp. 445-450 ◽  
Author(s):  
Ming Li ◽  
Fei Meng ◽  
Xiao Yang Guo
Keyword(s):  
Mechanical Properties ◽  
Graphite Oxide ◽  
Complex Stress ◽  
Fluid Loss ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Reinforced Cement ◽  
Well Cement

The effect of graphite oxide (GO) on the mechanical properties of oil well cement was experimentally studied, in view of the zonal isolation failure due to the brittleness. The microstructure of cement stone was observed by SEM, and the mechanism of graphite oxide reinforced cement stone was also investigated. The result illustrates that the mechanical properties of cement was improved significantly due to the addition of GO. When the GO dosage was 0.05%, the compressive strength, flexural toughness, and splitting tensile strength of cement paste at 7 day age were increased by 61.32%, 15.46% and 145.34% respectively. GO had no bad effect on the application properties of cement slurry, and the stability of the slurry was favorable. Besides, GO could reduce the fluid loss of cement slurry. When GO reinforced cement stone undergoes damage under complex stress, if damage occurs within graphite oxide layer, chemical bonds of GO layers must have been broken, and the force between the layers of GO must be overcome when interlaminar peeling happens, which will lead large amounts of energy consumption as well. The mechanical properties of the cement stone were enhanced by the above two aspects. The research results can provide a theoretical reference for solving the brittle fracture of oil well cement stone.

scholarly journals Hybrid Effect of Wollastonite Fiber and Carbon Fiber on the Mechanical Properties of Oil Well Cement Pastes

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Jianglin Zhu ◽  
Jiangxiong Wei ◽  
Qijun Yu ◽  
Mingbiao Xu ◽  
Yuwei Luo
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Carbon Fiber ◽  
Impact Strength ◽  
Flexural Strength ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Well Cement

Oil well cement is a type of natural brittle material that cannot be used directly in cementing operations. Fiber is a type of material that can effectively improve the strength and toughness of cement stone, and hybrid fiber materials can more effectively improve the performance of a cement sample. To overcome the natural defects of oil well cement, the new mineral fiber, i.e., wollastonite fiber, and common carbon fiber were used in oil well cement, and the micromorphology, mechanical properties, and stress-strain behavior of the cement were evaluated. The experimental results show that carbon fiber and wollastonite fiber are randomly distributed in the cement paste. The mechanical properties of the cement paste are improved by bridging and pulling out. The compressive strength, flexural strength, and impact strength of cement stone containing only carbon fiber or wollastonite fiber are higher than those of the pure cement, but too many fibers are not conducive to the development of mechanical properties. A mixture of 0.3% carbon fiber with 6% wollastonite fiber in oil well cement slurry results in a greater increase in compressive strength, flexural strength, and impact strength. In addition, compared with blank cement stone, the strain of the mixed cement stone increases substantially, and the elastic modulus decreases by 37.8%. The experimental results supply technical support for the design of a high-performance cement slurry system.

Mechanical properties and microstructure of oil-well cement stone enhanced with submicron SiC whiskers

2018 ◽  
Vol 33 (1) ◽  
pp. 50-65 ◽  
Author(s):  
Ming Li ◽  
Mingdan He ◽  
Yongjin Yu ◽  
Shuang Deng ◽  
Xiaoyang Guo
Keyword(s):  
Mechanical Properties ◽  
Cement Stone ◽  
Oil Well ◽  
Oil Well Cement ◽  
Sic Whiskers ◽  
Well Cement

The Mechanical Properties and Micro-Structure of Oil Well Cement Enhanced by Graphene Oxide

2018 ◽  
Vol 916 ◽  
pp. 200-204 ◽  
Author(s):  
Hui Ting Liu ◽  
Jian Zhou Jin ◽  
Yong Jin Yu ◽  
Shuo Qiong Liu
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Graphene Oxide ◽  
Cement Stone ◽  
Enhancement Effect ◽  
Oil Well ◽  
Hydration Products ◽  
Micro Structure ◽  
Oil Well Cement ◽  
Well Cement

The improvement of strength and ductility is a challenging task for application of oil well cement. As a 2D nanomaterial with high strength and toughness, graphene oxide (GO) was used as a reinforcing additive in oil well cement. The mechanical properties and micro-structure of oil well cement enhanced by GO were investigated. The compressive strength and flexrual strenghth of cement stone both showed a good enhancement effect when the content of GO was 0.02% -0.05%. The compressive strength and flexrual strength could increase by 15.8% and 33.5%, respectively. The results of SEM and MIP revealed that GO played a template role in promoting the formation of hydration products and further filled in the pores between the hydration products, which refined the micro-structure and improved mechanical properties of the cement consequently.

scholarly journals Effect of Epoxy Resin Emulsion on the Mechanical Properties of Oil Well Cement-Based Composites

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Miao He ◽  
Jianjian Song ◽  
Mingbiao Xu ◽  
Lei He ◽  
Peng Xu
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Cement Paste ◽  
Styrene Butadiene Rubber ◽  
Cement Stone ◽  
Oil Well ◽  
Hydration Products ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Well Cement

Oil well cement is a brittle material, which can not ensure the long-term sealing integrity of oil and gas wells when used in cementing operations directly. As a kind of polymer emulsion material, epoxy resin emulsion has a bright future for improving the properties of the cement slurry. Epoxy resin emulsion was added to oil well cement and its workability and mechanical properties were studied, the stress-strain behavior of cement samples was evaluated, and the microstructure was observed by scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show the epoxy resin emulsion used in oil well cement will affect the fluidity, but the rheological property of cement slurry with different content of resin meets the construction requirements. The resin reduces the water loss of cement paste and has no adverse effect on the thickening time. The compressive strength of cement stone decreases with the increase in resin content. When the content of resin is 6%, the flexural strength and impact strength of the cement sample are the largest, and 50.7% and 20.2% higher than that of the specimen without resin, respectively, after curing for 28 days. Further comparison shows that epoxy resin emulsion can improve the mechanical properties of oil well cement better than styrene-butadiene rubber latex. Meanwhile, the resin obviously improves the deformability and decreases the elastic modulus of cement stone. Compared with pure cement, resin cement slurry has no extra hydration products, but the formation of hydrated calcium silicate is inhibited. The microstructure shows that the resin forms a polymer film in the cement matrix and interweaves with cement hydration products, thus improving the flexibility of cement paste.

scholarly journals Thermoplastic Rubber (TPR) Modified by a Silane Coupling Agent and Its Influence on the Mechanical Properties of Oil Well Cement Pastes

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Jianjian Song ◽  
Mingbiao Xu ◽  
Weihong Liu ◽  
Xiaoliang Wang ◽  
Peng Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cement Paste ◽  
Silane Coupling Agent ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Silane Coupling ◽  
Well Cement ◽  
Thermoplastic Rubber

The surface hydrophilicity of thermoplastic rubber (TPR) is poor, and the effect of using it directly in oil well cement is not good. TPR was modified by different silane coupling agents, and the hydrophilicity of the modified TPR was studied by Fourier-transform infrared (FT-IR) spectroscopy and dispersion stability photography. The application effect of modified TPR in oil well cement slurry was also evaluated. The fracture surface morphology of TPR cement stone was observed by macrophotography and scanning electron microscopy (SEM). The results demonstrated that the hydrophilicity of TPR particles was improved after modification with silane coupling agent 3-methacryloxypropyltrimethoxysilane (KH570), and its application effect in cement slurry was excellent. Compared with the pure cement paste, the compressive strength of the cement paste with addition of TPR modified by KH570 was reduced, but the flexural strength and impact strength of the cement paste were effectively enhanced. Moreover, the modified TPR greatly improved the deformation capacity and decreased the elastic modulus of the cement paste. The modified TPR particles formed a plastic polymer network structure in the cement stone and penetrated the cement hydration products, filling in the cement paste to form a flexible structural center. Thus, it improved the mechanical properties and reduced the brittleness of cement paste.

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