Performance Evaluation and Field Application of Nano Plugging Agent for Shale Water-Based Drilling Fluid

Jing, Minjia; Yuan, Zhiyong; Li, Xiaoyang; Huang, Jinjun; Tian, Yuexin

doi:10.3390/en15207529

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Under ideal conditions, the coating and the substrate will present a whole state, which can effectively prevent the coating from falling off and substrate separation. Moreover, during the UV curing process, the carbon–carbon double bond (CC) of AM and that of AMPS are polymerized to form AM/AMPS binary copolymer. − With the increase of curing time, the monomer migrates to the surface of the substrate to form a coating, and the two monomers react with each other to form a copolymer. − However, as the concentration of AMPS increases, the curing rate of the monomer solution also increases, the cross-linking density of the binary copolymer increases after curing, , and the migration ability of the monomer in the solution decreases, directly resulting in a decrease in the roughness and thickness of the as-prepared coating.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Chen,

Xu,

Tang

et al. 2023

Langmuir

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Polydimethylsiloxane (PDMS) has excellent physical–chemical properties and good biocompatibility. Thus, PDMS has been widely applied in biomedical applications. However, the low surface free energy and surface hydrophobicity of PDMS can easily lead to adverse symptoms, such as tissue damage and ulceration, during medical treatment. Therefore, the construction of a hydrophilic low-friction surface on the PDMS surface could be helpful for alleviating patient discomfort and would be of great significance for broadening the application of PDMS in the field of interventional medical catheters. Existing surface modification methods such as hydrogel coatings and chemical grafting suffer from several deficiencies including uncontrollable thickness, surface fragility, and low surface strength. In this study, a hydrophilic surface with ultra-low friction properties was prepared on the surface of PDMS by an ultraviolet light (UV) curing method. The monomer acrylamide (AM) was induced by a photoinitiator to form a coating on the surface of the silicone rubber by in situ polymerization. The surface roughness of the as-prepared coatings was regulated by adding different concentrations of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to the monomer solution, and the coating properties were systematically characterized. The results indicated that the roughness and thickness of the as-prepared coatings decreased with increasing AMPS concentration and the as-prepared coatings had good hydrophilicity and low-friction properties. The Coefficient of Friction (CoF) was as low as 0.0075 in the deionized water solution, which was 99.7% lower than that of the unmodified PDMS surface. Moreover, the coating with a lower surface roughness exhibited better low-friction properties. The results reported herein provide new insight into the preparation of hydrophilic, low-friction coatings on polymer surfaces.

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Section: Resultsmentioning

confidence: 99%

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Chen,

Xu,

Tang

et al. 2023

Langmuir

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“…Currently, the plugging materials primarily used in drilling sites can reduce losses caused by well leakage, but their effectiveness is unsatisfactory when dealing with crack-type and cavern-type leakages [10][11][12][13]. Cement slurry is commonly used for such leakages, but it is easily diluted and washed away by formation water, making it difficult for it to stay in the near-well leakage zone [9,11,[14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Development and Application of the Anti-High-Temperature Delayed Crosslinking Polymer as a Gel Plugging Additive for Drilling Fluid

Wang,

Cai,

Wang

et al. 2024

Gels

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With the gradual deepening of the exploration and development of deep and ultra-deep oil and gas resources, the problem of lost circulation in drilling operations is becoming more and more complex. From field experience, conventional plugging materials cannot fully meet the technical requirements of plugging operations in drilling engineering. In this study, a high-temperature- and salt-resistant polymer HDZ−A was synthesized. A high-temperature and delayed crosslinking polymer gel plugging agent can be prepared by adding a certain concentration of a crosslinking agent and a retarder. In this paper, the optimum synthesis conditions of the HDZ−A were determined with orthogonal experiments using viscoelasticity and viscosity as evaluation criteria for newly developed polymers. The molecular structure, temperature resistance, and relative molecular mass of HDZ−A were determined using infrared spectroscopy, nuclear magnetic resonance spectroscopy, and gel permeation chromatography. In addition, the optimal formula of the gel plugging agent was determined using gel strength as the evaluation standard. The results show that the newly developed gel plugging agent has stable performance after high-temperature crosslinking, and can resist high temperatures of 160 °C during formation. Under conditions of 160 °C, the gelation time can reach 4.5 h, and the plugging efficiency can reach more than 97%. Finally, the field test of the newly developed high-temperature-resistant delayed crosslinking polymer gel plugging agent was carried out in the direct exploration well KT-14X in the Ordos Basin. The field test showed that the plugging effect of the HDZ−A gel plugging agent was remarkable.

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Synthesis of modified silica nano as plugging agent for drilling fluid

Dong,

Li,

Pang

et al. 2024

Journal of Dispersion Science and Technology

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Performance Evaluation and Field Application of Nano Plugging Agent for Shale Water-Based Drilling Fluid

Cited by 3 publications

References 13 publications

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Development and Application of the Anti-High-Temperature Delayed Crosslinking Polymer as a Gel Plugging Additive for Drilling Fluid

Synthesis of modified silica nano as plugging agent for drilling fluid

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