Dangfei Wang

Effect of the hydrate reservoir parameters on the de-cementation performance of a hydrocyclone using CFD-DEM

Dangfei Wang, Guorong Wang, Weiju Zeng, Lin Zhong

Solid fluidization technology is an effective method for the development of natural gas hydrate, and the key step is the de-cementation and separation of a large number of hydrate-sand cemented particles in the hydrate slurry. Natural gas hydrate reservoirs have characteristics such …

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Structural optimization of hydrocyclones for enhanced separation of the hydrate-sand cemented particles: A coupled simulation study

Dangfei Wang, Guorong Wang, Weiju Zeng, Mengdi Wu et autres

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Flow Field Characteristics and Separation Performance of a Novel Hydrocyclone for Natural Gas Hydrate under Pulsating Flow

Dangfei Wang, Guorong Wang, Weiju Zeng, Lin Zhong

Solid fluidization mining is a promising method for natural gas hydrate. However, this technique involves complex downhole conditions, including pulsating flow resulting from drilling pump operations, which significantly impairs the separation efficiency of hydrocyclones. This study investigates the flow field characteristics and …

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In-situ de-cementation of cemented particles in a hydrocyclone for natural gas hydrate

Dangfei Wang, Guorong Wang, Weiju Zeng, Cheng Yu et autres

Solid fluidization mining method is a promising method to develop natural gas hydrate, in which the in-situ separation of sand and hydrate particles is a key link. However, the presence of cemented particles will increase the difficulty of sand removal, leading to …

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Numerical study of the law and mechanism of methane hydrate particle aggregation inside the pipe under periodic vibration

Cheng Hsien Yu, Dangfei Wang, Meiying Xie, Chuanjun Han et autres

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Enhancing offshore oil and gas platform sustainability through wind-powered hydrogen production

Jiayi Wang, Shaohua Nie, Yu Gao, Peng Zheng et autres

Decarbonizing offshore oil and gas platforms has become a critical challenge in the energy transition. In this article, we propose the following two models for decarbonizing offshore oil and gas platforms to facilitate highly challenging energy transitions: (1) repurposing decommissioned platforms as …

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Design and flow field characteristics analysis of spiral-uniflow coupled gas-liquid separator with wide range of inlet gas volume fractions

Lin Zhong, Xincheng Guo, Yin Congbin, Ruyi Gou et autres

During the exploitation of low permeability oilfields, associated gas will be produced with crude oil. The intermittent pumping method leads to a large range of gas-liquid ratio of produced liquid. Although a little separator can meet the separation requirements of oil field, …

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Numerical analysis of phase transition of mining cavity in hydrate solid fluidization exploitation coupled multi-field

Mengdi Wu, Guorong Wang, Linfeng Zhang, Qiang Fu et autres

Natural gas hydrate reserves are vast, and the exploitation often entails complex phase transitions. Nevertheless, the potential microphase transition within the cavity has been ignored in solid fluidization mining. In this paper, referencing the actual extraction parameters, a multi-field coupling model of …

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Influence of Groove Texture Parameters on the Friction Performance of Roller Bit Floating Sleeve Bearings

Gang Wei, Guorong Wang, Lin Zhong, Yang Wang et autres

Abstract Improving the wear resistance of cone bit bearings is crucial for enhancing bit life and drilling efficiency. This study integrates surface texture lubrication with bit floating sleeve bearings. A ring-block friction experiment was conducted under simulated drilling conditions, examining groove textures …

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A novel tool to break the cementation force of a 9-5/8″ casing-cement sheath system for offshore well abandonment operations: design, tests, and feasibility analysis

Linfeng Zhang, Guorong Wang, Lin Zhong, Huixian Mu et autres

Casing recovery in offshore well abandonment is challenging due to the cementation force between the casing and the cement sheath. To improve the well abandonment operation efficiency and success rate, in this paper, a newly developed metal casing recovery method for the …

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Study on the Flow Field Characteristics of a Spiral-Axial Coupling Type Two-Stage Gas-Liquid Separator with Wide Gas-Bearing Range

Lin Zhong, Xincheng Guo, Ruyi Gou, Guorong Wang et autres

Effect of the protrusion of the mining chamber on particle recovery performance in solid-state fluidization mining for natural gas hydrate

Dangfei Wang, Guorong Wang, Lin Zhong, Xiaoping Liu

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