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Tianle Liu
School of Economics and Management, China University of Geosciences, Wuhan 430074, China

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Short Biography

Tianle Liu has been a Doctor and Associate Professor at the China University of Geosciences (Wuhan) since 2013. His research interests include unconventional energy exploration and development, drilling and cementing at low temperatures, microorganism applications in oil and gas well engineering, special reinforcement technology, downhole electric steam generator, and reservoir oil preservation technology.

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Journal article
Published: 17 May 2021 in International Journal of Environmental Research and Public Health
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At present, strategies for controlling the COVID-19 pandemic have made significant and strategic strides; however, and the large quantities of healthcare treatment waste have become another important “battlefield”. For example, in Wuhan, the production rate of healthcare waste in hospitals, communities, temporary storage, and other units was much faster than the disposal rate during the COVID-19 pandemic. Improving the efficiency of healthcare waste transfer and treatment has become an important task for government health and environmental protection departments at all levels. Based on the situation of healthcare waste disposal in Wuhan during the critical period of the pandemic, this paper analyzes and studies green governance principles and summarizes the problems that exist in the current healthcare waste management system. Through the establishment of temporary storage facilities along transit routes, digital simulation and bionic experiments were carried out in the Hongshan District of Wuhan to improve the efficiency of healthcare waste transfer. Furthermore, this study discusses the coordination and cooperation of government, hospitals, communities, and other departments in the healthcare waste disposal process and provides guiding suggestions for healthcare waste disposal nationwide in order to deal with potential risks and provide effective references in all regions.

ACS Style

Ziyuan Liu; Tianle Liu; Xingdong Liu; Aijing Wei; Xiaoxue Wang; Ying Yin; You Li. Research on Optimization of Healthcare Waste Management System Based on Green Governance Principle in the COVID-19 Pandemic. International Journal of Environmental Research and Public Health 2021, 18, 5316 .

AMA Style

Ziyuan Liu, Tianle Liu, Xingdong Liu, Aijing Wei, Xiaoxue Wang, Ying Yin, You Li. Research on Optimization of Healthcare Waste Management System Based on Green Governance Principle in the COVID-19 Pandemic. International Journal of Environmental Research and Public Health. 2021; 18 (10):5316.

Chicago/Turabian Style

Ziyuan Liu; Tianle Liu; Xingdong Liu; Aijing Wei; Xiaoxue Wang; Ying Yin; You Li. 2021. "Research on Optimization of Healthcare Waste Management System Based on Green Governance Principle in the COVID-19 Pandemic." International Journal of Environmental Research and Public Health 18, no. 10: 5316.

Journal article
Published: 07 May 2021 in Sustainability
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With the deepening of the concepts of “sustainable development”, green supply chain management has gradually been attached great importance by the government and enterprises. Based on the green supply chain management method, this paper studies the path optimization of industrial hazardous waste treatment transportation in environmental protection enterprises, aiming at the green purchasing link, in order to realize the management of the green purchasing of environmental enterprises linked to green production under the green supply chain management which integrates green purchasing, hazardous waste storage and green disposal.

ACS Style

Ziyuan Liu; Yingzhao Wu; Tianle Liu; Xiaoxue Wang; Wenzhuo Li; Ying Yin; Xiangfei Xiao. Double Path Optimization of Transport of Industrial Hazardous Waste Based on Green Supply Chain Management. Sustainability 2021, 13, 5215 .

AMA Style

Ziyuan Liu, Yingzhao Wu, Tianle Liu, Xiaoxue Wang, Wenzhuo Li, Ying Yin, Xiangfei Xiao. Double Path Optimization of Transport of Industrial Hazardous Waste Based on Green Supply Chain Management. Sustainability. 2021; 13 (9):5215.

Chicago/Turabian Style

Ziyuan Liu; Yingzhao Wu; Tianle Liu; Xiaoxue Wang; Wenzhuo Li; Ying Yin; Xiangfei Xiao. 2021. "Double Path Optimization of Transport of Industrial Hazardous Waste Based on Green Supply Chain Management." Sustainability 13, no. 9: 5215.

Journal article
Published: 30 March 2021 in Applied Sciences
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Changing the water-to-cement ratio is one of the major ways to develop cement slurry with different densities, which in turn will greatly affect the pore structure and mechanical properties of cement slurry. In the current study, the cement hydration model HYMOSTRUC3D was used to investigate the effects of water-to-cement (w/c) ratio (0.40, 0.44, 0.50) on the pore structure evolution and strength development of cement slurry. The microstructure of the cement stone was characterized via scanning electron microscope (SEM) and micro-computed tomography (micro-CT), and the mechanical strength of the cement stone was tested and analyzed via a mechanical tester. The simulated compressive strength and capillary porosity are in good agreement with the measured data, where the relative error between the simulated results and measured results are within 0.6~10.7% and 13.04~25.31%, respectively. The capillary porosity is proved as the main factor affecting the compressive strength of cement stone with different w/c ratios. Herein, the mathematical relationship between the measured capillary porosity and compressive strength could be well fitted via the mathematical prediction models of the Balshin function (R2 = 0.95), Ryshkewitch function (R2 = 0.94), Schiller function (R2 = 0.96), and the linear regression function (R2 = 0.95). Moreover, the linear regression function (y = −2.38x + 82.76) can be used to characterize and predict the quantitative relationship between the compressive strength and capillary porosity of cement stone. The findings in this study will provide a reference value in the fields of oil and gas cementing and building concrete.

ACS Style

Shaojun Zheng; Tianle Liu; Guosheng Jiang; Changliang Fang; Bo Qu; Peng Gao; Lixia Li; Yingtao Feng. Effects of Water-to-Cement Ratio on Pore Structure Evolution and Strength Development of Cement Slurry Based on HYMOSTRUC3D and Micro-CT. Applied Sciences 2021, 11, 3063 .

AMA Style

Shaojun Zheng, Tianle Liu, Guosheng Jiang, Changliang Fang, Bo Qu, Peng Gao, Lixia Li, Yingtao Feng. Effects of Water-to-Cement Ratio on Pore Structure Evolution and Strength Development of Cement Slurry Based on HYMOSTRUC3D and Micro-CT. Applied Sciences. 2021; 11 (7):3063.

Chicago/Turabian Style

Shaojun Zheng; Tianle Liu; Guosheng Jiang; Changliang Fang; Bo Qu; Peng Gao; Lixia Li; Yingtao Feng. 2021. "Effects of Water-to-Cement Ratio on Pore Structure Evolution and Strength Development of Cement Slurry Based on HYMOSTRUC3D and Micro-CT." Applied Sciences 11, no. 7: 3063.

Journal article
Published: 11 March 2021 in Energies
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Due to the inappropriate treatment of dairy wastewater, which can easily cause underground water pollution, there is an increasing need for a novel approach to reuse dairy wastewater. The technology of microbially induced calcium carbonate precipitation with environmentally friendly characteristics and high efficiency has been widely used for underground infrastructure remediation. However, there is a lack of in-depth research on the application of this technology under extreme underground environments, such as the borehole of oil wells with high temperature, high pressure, alkaline, and aerobic conditions. In addition, to reduce the cost of this technology when applied on a large scale, we adopted dairy wastewater to cultivate bacteria. Then, we put the bacterial solution into cement slurry in the borehole to improve the cementing quality. In this paper, the rheology properties, mechanical strength, permeability, porosity, and pore distribution of microbial cementing slurry were studied. Moreover, we applied this microbial cement slurry in the Chunguang 17-14 well of China, and the sealing channeling ability of cement sheath on site was evaluated. The results showed that dairy wastewater could serve as an alternative medium to provide nutrients and energy for the growth of bacteria with low cost. Additionally, the microbial cement slurry exhibited a good right-angle thickening performance and high mechanical strength. The field application displayed an anti-gas channeling ability after microbial remediation. The application of dairy wastewater incubated bacteria to cement slurry not only provides an alternative method for the reuse of dairy wastewater but is also conducive to prolonging the lifespan of oil wells.

ACS Style

Lixia Li; Tianle Liu; Guosheng Jiang; Changliang Fang; Jiaxin Sun; Shaojun Zheng; Haodong Liu; Ekaterina Leusheva; Valentin Morenov; Nikolai Nikolaev. Field Application of Microbial Self-Healing Cement Slurry in Chunguang 17-14 Well. Energies 2021, 14, 1544 .

AMA Style

Lixia Li, Tianle Liu, Guosheng Jiang, Changliang Fang, Jiaxin Sun, Shaojun Zheng, Haodong Liu, Ekaterina Leusheva, Valentin Morenov, Nikolai Nikolaev. Field Application of Microbial Self-Healing Cement Slurry in Chunguang 17-14 Well. Energies. 2021; 14 (6):1544.

Chicago/Turabian Style

Lixia Li; Tianle Liu; Guosheng Jiang; Changliang Fang; Jiaxin Sun; Shaojun Zheng; Haodong Liu; Ekaterina Leusheva; Valentin Morenov; Nikolai Nikolaev. 2021. "Field Application of Microbial Self-Healing Cement Slurry in Chunguang 17-14 Well." Energies 14, no. 6: 1544.

Original paper
Published: 06 October 2020 in Arabian Journal of Geosciences
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A field case was first studied to verify the reliability of PLAXIS 2D and the accuracy of the modeling and calculation methods, in terms of calculating the radial earth pressure and vertical deformation on the cut-and-cover and trenchless pipes. Then, four types of classical soils were considered to compare the effects of cut-and-cover and trenchless construction methods on the installed flexible pipes. Besides, groundwater conditions and main physical properties of soils were also considered. Results demonstrate that deviations among the simulation calculated and the field measured value on earth pressure and deformation are all within 5%, showing a high accuracy and reliability. The maximum earth pressure and deformation on the cut-and-cover flexible pipe are 2.66–11.65 times and 3.96–11.95 times larger than that on the trenchless pipe, which is mainly due to the passive earth pressure caused by the deformation of the trenchless pipe. As the groundwater level increases from the bottom to 5.5 m above the top of pipes, the maximum earth pressure and deformation of the cut-and-cover pipe increase by 18.74% and 13.38%, while that on the trenchless pipe increased by 6 times and 3 times, because of the difference of reduction in effective stress. Density, cohesion, and friction angle are positively related to the earth pressure and deformation on the cut-and-cover pipe, and Poisson’s ratio and density are positively related to that on the trenchless pipe, while the others are the opposite. Density and cohesion are respectively the most significant factors affecting the cut-and-cover pipe and trenchless pipes.

ACS Style

Mingming Zheng; Meng Wei; Tianle Liu; Xuelin Yin; Chengxiang Tang; Kai Wang; Xinyuan Zhao; Jingjing Wu; Nilo Tsung. Earth pressure and deformation of cut-and-cover and trenchless flexible pipes under different soil properties and groundwater conditions. Arabian Journal of Geosciences 2020, 13, 1 -10.

AMA Style

Mingming Zheng, Meng Wei, Tianle Liu, Xuelin Yin, Chengxiang Tang, Kai Wang, Xinyuan Zhao, Jingjing Wu, Nilo Tsung. Earth pressure and deformation of cut-and-cover and trenchless flexible pipes under different soil properties and groundwater conditions. Arabian Journal of Geosciences. 2020; 13 (20):1-10.

Chicago/Turabian Style

Mingming Zheng; Meng Wei; Tianle Liu; Xuelin Yin; Chengxiang Tang; Kai Wang; Xinyuan Zhao; Jingjing Wu; Nilo Tsung. 2020. "Earth pressure and deformation of cut-and-cover and trenchless flexible pipes under different soil properties and groundwater conditions." Arabian Journal of Geosciences 13, no. 20: 1-10.

Journal article
Published: 09 September 2020 in Energies
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Improving the efficiency of well drilling process in a reservoir is directly related to subsequent well flow rates. Drilling of deviated and horizontal wells is often accompanied by an increase in pressure losses due to flow resistance caused by small size of the annular space. An important role in such conditions is played by the quality of borehole cleaning and transport capacity of drilling fluid, which is directly related to the rheological parameters of the drilling fluid. The main viscosifiers in modern drilling fluids are polymer reagents. They can be of various origin and structure, which determines their features. This work presents investigations that assess the effect of various polymers on the rheological parameters of drilling fluids. Obtained data are evaluated taking into account the main rheological models of fluid flow. However, process of fluid motion during drilling cannot be described by only one flow model. Paper shows experimentally obtained data of such indicators as plastic viscosity, dynamic shear stress, non-linearity index and consistency coefficient. Study has shown that high molecular weight polymer reagents (e.g., xanthan gum) can give drilling fluid more pronounced pseudoplastic properties, and combining them with a linear high molecular weight polymer (e.g., polyacrylamide) can reduce the value of the dynamic shear stress. Results of the work show the necessity of using combinations of different types of polymer reagents, which can lead to a synergetic effect. In addition to assessing the effect of various polymer reagents, the paper presents study on the development of a drilling fluid composition for specific conditions of an oil field.

ACS Style

Tianle Liu; Leusheva E. L.; Morenov V. A.; Lixia Li; Guosheng Jiang; Changliang Fang; Ling Zhang; Shaojun Zheng; Yinfei Yu. Influence of Polymer Reagents in the Drilling Fluids on the Efficiency of Deviated and Horizontal Wells Drilling. Energies 2020, 13, 4704 .

AMA Style

Tianle Liu, Leusheva E. L., Morenov V. A., Lixia Li, Guosheng Jiang, Changliang Fang, Ling Zhang, Shaojun Zheng, Yinfei Yu. Influence of Polymer Reagents in the Drilling Fluids on the Efficiency of Deviated and Horizontal Wells Drilling. Energies. 2020; 13 (18):4704.

Chicago/Turabian Style

Tianle Liu; Leusheva E. L.; Morenov V. A.; Lixia Li; Guosheng Jiang; Changliang Fang; Ling Zhang; Shaojun Zheng; Yinfei Yu. 2020. "Influence of Polymer Reagents in the Drilling Fluids on the Efficiency of Deviated and Horizontal Wells Drilling." Energies 13, no. 18: 4704.

Journal article
Published: 24 December 2019 in Journal of Petroleum Science and Engineering
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In this study, the process of drilling fluid penetrating into gas hydrate-bearing sediments in the Gulf of Mexico Hydrate Joint Industry Project was simulated with conditions similar to in situ drilling process parameters and reservoir temperatures and pressures. Natural sediments were replaced by artificial sediments columns with approximately similar physical properties. The temperature, pressure, and resistivity were measured in real time, and the effects of drilling fluid penetration on the physical properties were analyzed. The hydrate saturation, penetration depth, and influence mechanism of temperature and pressure difference were obtained. By orthogonal analysis, the porosity and resistivity of the artificial sediments columns were found to be optimized closely to natural conditions, with a difference of 1.29% and 4.0%, respectively. During penetration, a positive pressure difference was useful for maintaining hydrate stability, while the temperature difference had an opposite influence. High density, low temperature, and low filtration loss drilling fluid were found to be beneficial for field drilling. Hydrate decomposition gradually occurred with increasing depth, accompanied by reformation. The front edge of resistivity lagged behind the pressure and temperature, with a depth of ~0.65 m. Therefore, for resistivity logging after drilling, logging methods with a coordinated detection depth should be considered; thus, a dual laterolog with deep focused resistivity measurements would be a better choice.

ACS Style

Mingming Zheng; Tianle Liu; Guosheng Jiang; Meng Wei; Yuxiang Huo; Li Liu. Large-scale and high-similarity experimental study of the effect of drilling fluid penetration on physical properties of gas hydrate-bearing sediments in the Gulf of Mexico. Journal of Petroleum Science and Engineering 2019, 187, 106832 .

AMA Style

Mingming Zheng, Tianle Liu, Guosheng Jiang, Meng Wei, Yuxiang Huo, Li Liu. Large-scale and high-similarity experimental study of the effect of drilling fluid penetration on physical properties of gas hydrate-bearing sediments in the Gulf of Mexico. Journal of Petroleum Science and Engineering. 2019; 187 ():106832.

Chicago/Turabian Style

Mingming Zheng; Tianle Liu; Guosheng Jiang; Meng Wei; Yuxiang Huo; Li Liu. 2019. "Large-scale and high-similarity experimental study of the effect of drilling fluid penetration on physical properties of gas hydrate-bearing sediments in the Gulf of Mexico." Journal of Petroleum Science and Engineering 187, no. : 106832.

Journal article
Published: 21 March 2019 in Journal of Petroleum Science and Engineering
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The quantitative relationship among the four process parameters (bentonite, binders, pressure, and time) of artificial core preparation, two macroscopic physical parameters (permeability and porosity), and three microscopic pore parameters (average pore and throat diameters and pore throat ratio) are investigated through multiple sets of experiments. Further, this research considers the natural gas hydrate formation skeleton in the Mount Elbert Well on Alaska North Slope as the simulated object. The optimal artificial core formula with permeability and porosity similar to the in situ hydrate formation skeleton was optimized by an orthogonal test, the fitting function relationships among these three aspects were obtained, and a relationship model was established. The results demonstrated that the permeability and porosity of the optimal formula are extremely close to the natural formation skeleton, and the microscopic pore morphology is similar to that of the natural cores. The established relationship model can be used to accurately estimate the permeability, porosity, and pore and throat diameters using the four process parameters; in turn, the process parameters also can be estimated. The digital simulation preparation technology of the natural gas hydrate formation skeleton developed in this work can accurately and quickly estimate the macro-micro physical parameters of the artificial hydrate formation skeleton. Further, it can also prepare 60-cm-long cores that can be used in the subsequent experimental study of the physical property response in hydrate formation drilling, playing an important role for the simulation of natural formation skeletons.

ACS Style

Mingming Zheng; Tianle Liu; Zhenyu Gao; Jingjing Wu; Guosheng Jiang; Qian Li; Zhijun Li; Lanlan Xie. Simulation of natural gas hydrate formation skeleton with the mathematical model for the calculation of macro-micro parameters. Journal of Petroleum Science and Engineering 2019, 178, 429 -438.

AMA Style

Mingming Zheng, Tianle Liu, Zhenyu Gao, Jingjing Wu, Guosheng Jiang, Qian Li, Zhijun Li, Lanlan Xie. Simulation of natural gas hydrate formation skeleton with the mathematical model for the calculation of macro-micro parameters. Journal of Petroleum Science and Engineering. 2019; 178 ():429-438.

Chicago/Turabian Style

Mingming Zheng; Tianle Liu; Zhenyu Gao; Jingjing Wu; Guosheng Jiang; Qian Li; Zhijun Li; Lanlan Xie. 2019. "Simulation of natural gas hydrate formation skeleton with the mathematical model for the calculation of macro-micro parameters." Journal of Petroleum Science and Engineering 178, no. : 429-438.

Journal article
Published: 25 December 2017 in Energies
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Accurate characterization of heat transfer in a wellbore during drilling, which includes fluid circulation, is important for wellbore stability analysis. In this work, a pseudo-3D model is developed to simultaneously calculate the heat exchange between the flowing fluid and the surrounding media (drill pipe and rock formation) and the in-plane thermoelastic stresses. The cold drilling fluid descends through the drill pipe at constant injection rates and returns to the ground surface via the annulus. The fluid circulation will decrease the wellbore bottom temperature and reduce the near-wellbore high compressive stress, potentially leading to tensile fracturing of the well. The governing equations for the coupled heat transfer stress problem are formulated to ensure that the most important parameters are taken into account. The wellbore is subject to a non-hydrostatic in situ far-field stress field. In modeling heat exchange between fluid and surrounding media, the heat transfer coefficients are dependent on fluid properties and flow behavior. Analytical solutions in the Laplace space are obtained for the temperatures of the fluid in both the drill pipe and annulus and for the temperature and stress changes in the formation. The numerical results in the time domain are obtained by using an efficient inversion approach. In particular, the near-well stresses are compared for the cases with fixed and time-dependent cooling wellbore conditions. This comparison indicates that the using a fixed temperature wellbore conditions may over-estimate or under-estimate the bottom-hole stress change, potentially leading to wellbore stability problems.

ACS Style

Bisheng Wu; Tianle Liu; Xi Zhang; Bailin Wu; Robert G. Jeffrey; Andrew P. Bunger. A Transient Analytical Model for Predicting Wellbore/Reservoir Temperature and Stresses during Drilling with Fluid Circulation. Energies 2017, 11, 42 .

AMA Style

Bisheng Wu, Tianle Liu, Xi Zhang, Bailin Wu, Robert G. Jeffrey, Andrew P. Bunger. A Transient Analytical Model for Predicting Wellbore/Reservoir Temperature and Stresses during Drilling with Fluid Circulation. Energies. 2017; 11 (1):42.

Chicago/Turabian Style

Bisheng Wu; Tianle Liu; Xi Zhang; Bailin Wu; Robert G. Jeffrey; Andrew P. Bunger. 2017. "A Transient Analytical Model for Predicting Wellbore/Reservoir Temperature and Stresses during Drilling with Fluid Circulation." Energies 11, no. 1: 42.

Journal article
Published: 01 September 2017 in Marine and Petroleum Geology
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ACS Style

Jiaxin Sun; Ling Zhang; Fulong Ning; Hongwu Lei; Tianle Liu; Gaowei Hu; Hailong Lu; Jingan Lu; Changling Liu; Guosheng Jiang; Jinqiang Liang; Nengyou Wu. Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study. Marine and Petroleum Geology 2017, 86, 447 -473.

AMA Style

Jiaxin Sun, Ling Zhang, Fulong Ning, Hongwu Lei, Tianle Liu, Gaowei Hu, Hailong Lu, Jingan Lu, Changling Liu, Guosheng Jiang, Jinqiang Liang, Nengyou Wu. Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study. Marine and Petroleum Geology. 2017; 86 ():447-473.

Chicago/Turabian Style

Jiaxin Sun; Ling Zhang; Fulong Ning; Hongwu Lei; Tianle Liu; Gaowei Hu; Hailong Lu; Jingan Lu; Changling Liu; Guosheng Jiang; Jinqiang Liang; Nengyou Wu. 2017. "Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study." Marine and Petroleum Geology 86, no. : 447-473.

Article
Published: 14 October 2016 in Journal of Earth Science
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To maintain gas hydrate stability, low-temperature drilling fluids and high drilling speeds should be used while drilling in gas hydrate-bearing sediments. The effect of the drilling fluid on downhole rock surfaces at low temperatures is very important to increase the drilling rate. This paper analyzed the action mechanism of the drilling fluid on downhole rock surfaces and established a corresponding evaluation method. The softening effect of six simulated drilling fluids with 0.1 wt.% of four common surfactants and two common organic salts on the downhole rock surface strength was evaluated experimentally using the established method at low temperature. The experimental results showed that the surfactants and organic salts used in the drilling fluids aided in the reduction of the strength of the downhole rock surface, and the established evaluation method was able to quantitatively reveal the difference in the softening effect of the different drilling fluids through comparison with water. In particular, the most common surfactant that is used in drilling fluids, sodium dodecyl sulfate (SDS), had a very good softening effect while drilling under low-temperature conditions, which can be widely applied during drilling in low-temperature formations, such as natural gas hydrate-bearing sediments, the deep seafloor and permafrost.

ACS Style

Mingming Zheng; Guosheng Jiang; Tianle Liu; Fulong Ning; Ling Zhang; V. F. Chikhotkin. Effect on the performance of drilling fluids at downhole rock surfaces at low temperatures. Journal of Earth Science 2016, 27, 856 -863.

AMA Style

Mingming Zheng, Guosheng Jiang, Tianle Liu, Fulong Ning, Ling Zhang, V. F. Chikhotkin. Effect on the performance of drilling fluids at downhole rock surfaces at low temperatures. Journal of Earth Science. 2016; 27 (5):856-863.

Chicago/Turabian Style

Mingming Zheng; Guosheng Jiang; Tianle Liu; Fulong Ning; Ling Zhang; V. F. Chikhotkin. 2016. "Effect on the performance of drilling fluids at downhole rock surfaces at low temperatures." Journal of Earth Science 27, no. 5: 856-863.

Research article
Published: 14 June 2016 in Journal of Natural Gas Science and Engineering
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With increasing concerns relating to nature gas hydrate exploration and development worldwide, increasing attention has been paid to drilling technology in gas hydrate-bearing sediment (GHBS). According to the drilling characteristics of hydrate formation and the existing nanomaterials, a new low-cost drilling fluid has been established through more than 120 groups of experiments for drilling in GHBS: seawater + 2% Nano SiO2 + 3% bentonite + 1% Na-CMC (sodium carboxymethyl cellulose) + 3% SMP-2 (sulfomethylated phenolic resin) + 1% PVP (K90) (polyvinylpyrrolidone) + 2% KCl. Additionally, the traditional low-temperature performance and inhibition of hydrate formation of this drilling fluid have been evaluated. The experimental results show that this drilling fluid has optimal density, good low-temperature rheology, and sufficient shale hydration inhibition and is able to effectively inhibit free gas from undergoing hydrate dissociation near boreholes to reform the hydrate in the drilling fluid circulation system. In addition, the cost of per cubic meter of this drilling fluid is only $400–450, which is 15%–20% less expensive than existing drilling fluids for drilling in GHBS in the South China Sea. Therefore, this drilling fluid will contribute to safe and efficient borehole drilling operation in GHBS.

ACS Style

Tianle Liu; Guosheng Jiang; Ping Zhang; Jiaxin Sun; Huicui Sun; Ren Wang; Mingming Zheng. A new low-cost drilling fluid for drilling in natural gas hydrate-bearing sediments. Journal of Natural Gas Science and Engineering 2016, 33, 934 -941.

AMA Style

Tianle Liu, Guosheng Jiang, Ping Zhang, Jiaxin Sun, Huicui Sun, Ren Wang, Mingming Zheng. A new low-cost drilling fluid for drilling in natural gas hydrate-bearing sediments. Journal of Natural Gas Science and Engineering. 2016; 33 ():934-941.

Chicago/Turabian Style

Tianle Liu; Guosheng Jiang; Ping Zhang; Jiaxin Sun; Huicui Sun; Ren Wang; Mingming Zheng. 2016. "A new low-cost drilling fluid for drilling in natural gas hydrate-bearing sediments." Journal of Natural Gas Science and Engineering 33, no. : 934-941.

Original articles
Published: 13 November 2015 in Marine Georesources & Geotechnology
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A new analytical model is presented to analyze the dynamic stress diffusion effect of pile end soil on the vertical dynamic impedance of the pile. The surrounding soil of the pile is modeled by using the plane strain model and the pile is simulated by using one-dimensional elastic theory. Finite soil layers below the pile end are modeled as conical fictitious soil pile with stress diffusion angle which reflects the dynamic stress diffusion effect of pile end soil. By means of the Laplace transform and impedance function transfer method, the analytical solution of the vertical dynamic impedance at the pile head in frequency domain is yielded. Then, a comparison with other models is performed to verify the conical fictitious soil pile model. Finally, based on the proposed solution, the selected numerical results are compared to analyze the influence of dynamic stress diffusion effect for different design parameters of the soil-pile system on the vertical dynamic impedance at the pile head.

ACS Style

Tian-Le Liu; Wen-Bing Wu; Bin Dou; Guo-Sheng Jiang; Shu-Hui Lü. Vertical dynamic impedance of pile considering the dynamic stress diffusion effect of pile end soil. Marine Georesources & Geotechnology 2015, 35, 1 -9.

AMA Style

Tian-Le Liu, Wen-Bing Wu, Bin Dou, Guo-Sheng Jiang, Shu-Hui Lü. Vertical dynamic impedance of pile considering the dynamic stress diffusion effect of pile end soil. Marine Georesources & Geotechnology. 2015; 35 (1):1-9.

Chicago/Turabian Style

Tian-Le Liu; Wen-Bing Wu; Bin Dou; Guo-Sheng Jiang; Shu-Hui Lü. 2015. "Vertical dynamic impedance of pile considering the dynamic stress diffusion effect of pile end soil." Marine Georesources & Geotechnology 35, no. 1: 1-9.

Journal article
Published: 19 January 2011 in Energies
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Shale inhibition, low-temperature performance, the ability to prevent calcium and magnesium-ion pollution, and hydrate inhibition of polyethylene glycol drilling fluid were each tested with conventional drilling-fluid test equipment and an experimental gas-hydrate integrated simulation system developed by our laboratory. The results of these tests show that drilling fluid with a formulation of artificial seawater, 3% bentonite, 0.3% Na2CO3, 10% polyethylene glycol, 20% NaCl, 4% SMP-2, 1% LV-PAC, 0.5% NaOH and 1% PVP K-90 performs well in shale swelling and gas hydrate inhibition. It also shows satisfactory rheological properties and lubrication at temperature ranges from −8 °C to 15 °C. The PVP K-90, a kinetic hydrate inhibitor, can effectively inhibit gas hydrate aggregations at a dose of 1 wt%. This finding demonstrates that a drilling fluid with a high addition of NaCl and a low addition of PVP K-90 is suitable for drilling in natural marine gas-hydrate-bearing sediments.

ACS Style

Guosheng Jiang; Tianle Liu; Fulong Ning; Yunzhong Tu; Ling Zhang; Yibing Yu; Lixin Kuang. Polyethylene Glycol Drilling Fluid for Drilling in Marine Gas Hydrates-Bearing Sediments: An Experimental Study. Energies 2011, 4, 140 -150.

AMA Style

Guosheng Jiang, Tianle Liu, Fulong Ning, Yunzhong Tu, Ling Zhang, Yibing Yu, Lixin Kuang. Polyethylene Glycol Drilling Fluid for Drilling in Marine Gas Hydrates-Bearing Sediments: An Experimental Study. Energies. 2011; 4 (1):140-150.

Chicago/Turabian Style

Guosheng Jiang; Tianle Liu; Fulong Ning; Yunzhong Tu; Ling Zhang; Yibing Yu; Lixin Kuang. 2011. "Polyethylene Glycol Drilling Fluid for Drilling in Marine Gas Hydrates-Bearing Sediments: An Experimental Study." Energies 4, no. 1: 140-150.