Research and Application of High-Density Cementing Slurry Technology under the Condition of Oil-based Drilling Fluid in Salt Formation

Wang, Jingpeng; Xiong, Yingfei

doi:10.1007/s13369-021-06325-9

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…According to different cooling methods, transformers can be divided into dry-type transformers and oil-immersed transformers. Drytype transformers are small in size and clean in technology, and they are often used in indoor environments with high requirements for fire and explosion protection; oil-immersed transformers have large capacity, good heat dissipation, low price, and are more widely used, especially in occasions with high requirements on capacity and load [1]. Transformer oil is used as a medium for insulation and heat dissipation, and its quality will directly affect the safety and reliability of the transformer.…”

Section: Introductionmentioning

confidence: 99%

High Efficiency Compound Vacuum Oil Gas Separation Technology Based on Integrated Oil Filter of Ultra-High Voltage Transformer

Jin

Liu

et al. 2022

International Transactions on Electrical Energy Systems

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In order to improve the filtering effect of vacuum oil purifier, the author proposes the research and application of high-efficiency compound vacuum oil-gas separation technology based on electric ultra-high voltage transformer integrated oil purifier. The author studies under the condition of constant oil temperature and flow rate, the effect of vacuum degree on the filtering effect of transformer oil vacuum oil filter. Using the research results, a frequency conversion automatic vacuum oil filter is designed, which makes the processing process have the characteristics of simple operation, high degree of automation, and high work efficiency. The test results show that if the transformer oil processed by the variable frequency automatic vacuum oil purifier is new oil, its water content is less than 45 mg/kg and the gas content is less than 12%; when the breakdown voltage is greater than 25 kV, the transformer oil index can meet the following requirements after the equipment is filtered for one cycle: breakdown voltage ≥75 kV; water content ≤5 mg/kg; and gas content ≤0.1% (volume ratio). After one cycle (after 100 min), the variable frequency automatic (three-stage) vacuum oil filter can greatly shorten the time of transformer oil circulating and filtering. Conclusion. The designed frequency conversion automatic vacuum oil purifier is obviously better than other transformer oil vacuum oil purifiers.

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Section: Introductionmentioning

confidence: 99%

High Efficiency Compound Vacuum Oil Gas Separation Technology Based on Integrated Oil Filter of Ultra-High Voltage Transformer

Jin

Liu

et al. 2022

International Transactions on Electrical Energy Systems

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“…However, it exhibits good thermal stability, which is beneficial for maintaining borehole wall stability and causing less damage to oil and gas formations. In challenging scenarios, such as high-temperature deep wells, highly inclined directional wells, horizontal wells, and complex formations, the advantages of oil-based drilling fluid make it a crucial choice for effective protection [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A Submicron-Scale Plugging Agent for Oil-Based Drilling Fluid Synthesized Using the Inverse Emulsion Polymerization Method

Zhang

Dai

2023

Polymers

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Due to the increasing difficulty of drilling in the later stages of oil and gas field development, the development of micro-pores and micro-fractures is becoming common. Conventional plugging agents have relatively large particle sizes. So, choosing the appropriate plugging agent can prevent leakages. Using the inverse emulsion polymerization method, acrylamide, 2-acrylamide-2-methylpropane sulfonic acid and acrylic acid were selected to be the main reaction monomers, N,N′-methylenebisacrylamide was used as a crosslinking agent, sorbitan monostearate and polyoxyethylene sorbitan anhydride monostearate were used as emulsifiers, and 2,2′-azobis(2-methylpropionamidine) dihydrochloride was used as the initiator to synthesize a nano-scale plugging agent for oil-based drilling fluid. The plugging agent was characterized using infrared spectroscopy, scanning electron microscopy, and thermogravimetry analysis. The results showed that the plugging agent is spherical and uniform in size, with particles being in the submicron range. Additionally, it exhibited strong temperature resistance. Finally, the performance of the plugging agent was evaluated via experiments conducted under normal temperature and pressure, high-temperature and high-pressure, and core-plugging conditions. After adding the plugging agent to the oil-based drilling fluid, the basic rheological properties of the oil-based drilling fluid were not significantly affected. Furthermore, the filtration loss was significantly reduced under normal temperature and pressure, as well as under high-temperature and high-pressure conditions, after aging. When the plugging agent with 3% concentration was added, the reduction rate of pore core permeability reached 96.04%. Therefore, the plugging agent for the oil-based drilling fluid can effectively improve the wellbore stability and has a promising potential for field applications.

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Preparation of a salt-responsive zwitterionic hydrophobically associating polymer and its application in a saturated sodium chloride drilling fluid

Wang,

Deng,

Yang

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Research and Application of High-Density Cementing Slurry Technology under the Condition of Oil-based Drilling Fluid in Salt Formation

Cited by 6 publications

References 24 publications

High Efficiency Compound Vacuum Oil Gas Separation Technology Based on Integrated Oil Filter of Ultra-High Voltage Transformer

High Efficiency Compound Vacuum Oil Gas Separation Technology Based on Integrated Oil Filter of Ultra-High Voltage Transformer

A Submicron-Scale Plugging Agent for Oil-Based Drilling Fluid Synthesized Using the Inverse Emulsion Polymerization Method

Preparation of a salt-responsive zwitterionic hydrophobically associating polymer and its application in a saturated sodium chloride drilling fluid

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