Flow Drilling: Underbalance Drilling with Liquid Single-Phase Systems

Rehm, Bill

doi:10.1016/b978-1-933762-05-0.50009-7

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…To optimize the creation of a well-organized gel structure, we proposed a set of 7290 formulations by combining the information in Table (details available in the Method section). Those formulation proposals were screened as explained in the Method section by isolating 120 prototypes which accomplish the selected requirements. ,, Those formulations are expected to create a stable network that avoids flocculation problems. In the latter set of 120 formulations, AlC5 and AlC6 disappeared because their incorporation into the material formulations leads to mixtures that do not reach the established criteria, while flocculating or creating a weak gel when dispersed in water.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, laminar clay particles interact predominantly through electrostatic and van der Waals forces through edge-to-face, edge-to-edge, and face-to-face orientations, and the presence of polymeric thickening agents modifies these interactions at the interfaces and, consequently, the viscosity of the fluid . The rheology of a clay dispersion can be described by nonlinear models such as Herschel–Bulkley or can be approximated by the Bingham model, expressed by eq ,, where τ is the shear stress, yp is the Bingham yield stress, pv is the plastic viscosity, and γ is the shear rate.…”

Section: Introductionmentioning

confidence: 99%

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Data-Driven Experimental Design of Rheological Clay–Polymer Composites

Dico

Muñoz

Carcelén

et al. 2022

Ind. Eng. Chem. Res.

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Natural clays are used as thixotropic agents and viscosity controllers. When dispersed in water, laminar clays create a fluid suspension which can be further thickened by incorporating acrylic and cellulosic polymers. Typically, the identification of formulations exhibiting the optimal characteristics for specific rheological applications requires experimental testing of a large number of prototype mixtures, for which yield points and apparent and plastic viscosities are obtained from the measured shear-stress curves. Herein, we report an alternative approach involving high-throughput virtual experiments aimed at discovering high-performing clay–polymer rheological agent formulations at a fraction of the time and cost of experimental campaigns. Specifically, we developed customized feature vectors to represent the rheological formulations and combined them with Random Forest models trained on experimental data points. The latter were identified by latin hypercube sampling with a multidimensional uniformity designer algorithm to generate homogeneous information and amplify the initial historical data set. The final Random Forest models (R 2 > 0.91) of rheological targets were used to perform multiobjective optimizations of the formulations based on the Pareto front algorithm. The three highest-performing formulations identified by the screening process were prepared, and their water dispersions were characterized in terms of their rheological behavior. The prototypes create viscoplastic fluids with a yield point and apparent and plastic viscosity ranges of 54.5–57 Pa (26–27 lb/100 ft2), 28.5–30 mPa s, and 15–18 mPa s, respectively, reflecting a suitable gel strength to be employed in engineering operations such as horizontal directional drilling.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Data-Driven Experimental Design of Rheological Clay–Polymer Composites

Dico

Muñoz

Carcelén

et al. 2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…④ Deceleration stage: duration of 100 s, speed in 10 gradients, each gradient decreasing by 10 rpm, duration of 10 s for each gradient. The measured data were fitted using the Bingham model [ 27 ]. The Bingham rheological equation is as follows: τ = τ0 + ηp·γ where τ is the shear stress experienced by the Bingham fluid in Pa, τ0 is the yield stress of the Bingham fluid in Pa, ηp is the plastic viscosity of the Bingham fluid in Pa·s, and γ is the shear rate of the Bingham fluid in the flow state in s −1 .…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Performance of Polycarboxylate Superplasticizer with Viscosity-Reducing and Low-Shrinkage Properties for Fair-Faced Concrete

Li,

Qian,

Zheng

et al. 2024

Materials

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A low-shrinkage and viscosity-reducing polycarboxylate superplasticizer was synthesized with maleic anhydride (MAH), diethylene glycol monobutyl ether, and methoxypoly (ethylene glycol) methacrylate (MPEGnMA). The surface tension, early shrinkage, cement paste performance, and application performance of concrete made with the synthesized water-reducing admixture were tested. A series of experiments were conducted to determine the optimal range of plastic viscosity coefficients for producing high-quality, fair-faced concrete with minimal surface defects. These experiments utilized both the synthesized water-reducing admixture alone and in combination with other water-reducing agents. The results showed that the synthesized water-reducing admixture had an ideal molecular structure, as confirmed by the GPC spectrum. When added to an aqueous solution, it reduced the surface tension from 72.47 mN/m to 30.56 mN/m. The 72 h shrinkage value of concrete was reduced by 20.6% compared with that of the conventional control group, effectively reducing shrinkage and adjusting the viscosity of the concrete mixture. Additionally, the influence of the plastic viscosity coefficient on the apparent voids in fair-faced concrete was investigated. This study revealed that when the plastic viscosity coefficient was between 5 and 10 Pa·s, the apparent void grade of the fair-faced concrete was simultaneously excellent and good. This water-reducing admixture helped prevent surface cracking and voids in fair-faced concrete, making it a suitable choice for producing high-quality fair-faced concrete surfaces.

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Simple Discretisation Strategies for Better Convergence of Finite Element Model Without Increasing the Number of Degrees of Freedom

Skrinar,

Imamović

2024

Engineering Design Applications VI

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Flow Drilling: Underbalance Drilling with Liquid Single-Phase Systems

Cited by 6 publications

References 14 publications

Data-Driven Experimental Design of Rheological Clay–Polymer Composites

Data-Driven Experimental Design of Rheological Clay–Polymer Composites

Synthesis and Performance of Polycarboxylate Superplasticizer with Viscosity-Reducing and Low-Shrinkage Properties for Fair-Faced Concrete

Simple Discretisation Strategies for Better Convergence of Finite Element Model Without Increasing the Number of Degrees of Freedom

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