A chelating agent system for the removal of barium sulfate scale

Luo, Zhaohua; Zhang, Nanlin; Wang, Chunlei; Wu, Lin; Liu, Pingli; Ji, Hongyu

doi:10.1007/s13202-020-00886-5

Cited by 11 publications

(4 citation statements)

References 27 publications

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“… 76 Luo et al studied a DTPA–sodium polyacrylate blend (pH = 12) for the dissolution of barite and evaluated the blend's corrosion performance at 90 °C (194 °F). 77 The blend showed negligible corrosion rates for N80 and 13Cr for a testing time of 10 h. Disodium EDTA solutions can corrode carbon steel as high as 16.6 mm per year, which is considered high for engineering operations. 78 …”

Section: Aminopolycarboxylic Acids (Apcas)mentioning

confidence: 95%

From initial treatment design to final disposal of chelating agents: a review of corrosion and degradation mechanisms

Almubarak

Ramanathan

et al. 2022

RSC Adv.

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Section: Aminopolycarboxylic Acids (Apcas)mentioning

confidence: 95%

From initial treatment design to final disposal of chelating agents: a review of corrosion and degradation mechanisms

Almubarak

Ramanathan

et al. 2022

RSC Adv.

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“…Deprotonation of the DTPA occurs when all the protons have been captured. A strong metal hydroxide will sustain a high pH as the eight active ionic species of the DTPA ligands are charged negatively and improve the chelation capability [33]. Recently, among the top effective barium sulphate dissolution formulations are completely neutralised penta-potassium DTPA solutions with a pH greater than 12 [34].…”

Section: Methodology 21 Molecular Dynamic Simulationmentioning

confidence: 99%

The Simulation of Intermolecular Interactions of Carboxylic and Amine Groups With Calcium Carbonate

Azimi

Abdullah²,

Adam³

et al. 2022

Jurnal Teknologi

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Surface facilities including tubing and valves at the oilfield have been plagued by mineral scale deposits, which are constitute of calcium carbonate (CaCO3). Penta-potassium diethylenetriaminepentaacetic acid salt (DTPA-K5) has a higher affinity for the metal cations complexes during the chelation process. The eight complexing sites (five carboxylate and three amines) empower the metal ion interactions. This work investigated the molecular dynamics simulations between the DTPA-K5 with the calcium carbonate, CaCO3 scale. The interaction was performed through molecular dynamic (MD) simulation using condensed phase optimised molecular potentials for atomistic simulation studies (COMPASS) force field and the Ewald summation method in Material Studio. The simulation trajectory files examined the intermolecular interactions for radial distribution function (RDF). The simulation shows strong DTPA-K5 with calcium interactions, which revealed the metal ion complexes contributing to the chelation process through the reactive carboxylic and amine functional groups, which were O7 == Ca at radius, r, 2.25 Å with g(r) of 10.09 and N1 -- Ca at radius, r, 2.25 Å with g(r) 2.51.

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“…Some scholars achieve the decomposition of the sludge by chelating the solid phase of the sludge [ 20 ]. Zhifeng Luo [ 21 ] used diethylene triamine penta acetic acid (DTPA) and low-molecular compounds to prepare the chelating agent SA-20 to remove barium sulfate scaling, using physical crushing and chemical dissolution to treat barium sulfate scale effectively. However, most of the solid phase particles are encapsulated in the oil phase, and it is difficult for the chelating agent to make contact with it, so the full effect of the treatment cannot be achieved [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

A Nano-Cleaning Fluid for Downhole Casing Cleaning

Song

Zhang

et al. 2023

Polymers

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In drilling and completion projects, sludge is formed as a byproduct when barite and oil are mixed, and later sticks to the casing. This phenomenon has caused a delay in drilling progress, and increased exploration and development costs. Since nano-emulsions have low interfacial surface tension, wetting, and reversal capabilities, this study used nano-emulsions with a particle size of about 14 nm to prepare a cleaning fluid system. This system enhances stability through the network structure in the fiber-reinforced system, and prepares a set of nano-cleaning fluids with adjustable density for ultra-deep wells. The effective viscosity of the nano-cleaning fluid reaches 11 mPa·s, and the system is stable for up to 8 h. In addition, this research independently developed an indoor evaluation instrument. Based on on-site parameters, the performance of the nano-cleaning fluid was evaluated from multiple angles by heating to 150 °C and pressurizing to 3.0 Mpa to simulate downhole temperature and pressure. The evaluation results show that the viscosity and shear value of the nano-cleaning fluid system is greatly affected by the fiber content, and the cleaning efficiency is greatly affected by the concentration of the nano-emulsion. Curve fitting shows that the average processing efficiency could reach 60–85% within 25 min and the cleaning efficiency has a linear relationship with time. The cleaning efficiency has a linear relationship with time, where R2 = 0.98335. The nano-cleaning fluid enables the deconstruction and carrying of the sludge attached to the well wall, which accomplishes the purpose of downhole cleaning.

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A chelating agent system for the removal of barium sulfate scale

Cited by 11 publications

References 27 publications

From initial treatment design to final disposal of chelating agents: a review of corrosion and degradation mechanisms

From initial treatment design to final disposal of chelating agents: a review of corrosion and degradation mechanisms

The Simulation of Intermolecular Interactions of Carboxylic and Amine Groups With Calcium Carbonate

A Nano-Cleaning Fluid for Downhole Casing Cleaning

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