Practical Pressure Loss Predictions in Realistic Annular Geometries

Haciislamoglu, Mustafa

doi:10.2523/28304-ms

Cited by 18 publications

(8 citation statements)

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“…At 0.7 m/s, the Reynolds number is already well above 2000, and transitional flow effects may have increased the pressure gradient. Haciislamoglu and Cartalos [16] found that the pressure loss reduction due to eccentricity is smaller in the transitional region than both in the laminar and in the turbulent regions. This effect has not been modeled here, which may account for the discrepancy in this region.…”

Section: Circulation Pressure Dropmentioning

confidence: 95%

“…between pressure gradient in eccentric and concentric annuli, respectively, where ɛ is eccentricity and κ is the ratio of D i over D o . For turbulent flow the correlation developed by Haciislamoglu and Cartalos [16] for a power-law fluid was used. This fluid was adapted to a yield stress fluid following Kelessidis et al [17], using the flow behavior index n in the correlation.…”

Section: Circulation Pressure Dropmentioning

confidence: 99%

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Oil-Based Drilling Fluid's Cuttings Bed Removal Properties for Deviated Wellbores

Ytrehus

Lund

Taghipour

et al. 2021

Journal of Energy Resources Technology

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Results from cuttings transport tests in laboratory using different field applied oil-based drilling fluids with similar weight and varying viscosities are presented in this paper. The fluids are designed for highly deviated wells, and the cuttings transport performance at relevant wellbore inclinations was investigated. The experiments have been performed in a flow loop that consists of a 10 meters long test section with 50.4 mm (2″) diameter freely rotating steel drill string inside a 100 mm (≈4″) diameter wellbore made of cement. Sand particles were injected while circulating the drilling fluid through the test section. Experiments were performed at three wellbore inclinations: 48, 60 and 90 degrees from vertical. The applied flow loop dimensions are designed so that the results are scalable to field applications; especially for the 12 ¼” and 8 ½″ sections. The selected setup provides correct shear rate ranges and similar Reynolds numbers to the field application when the same fluids are applied. Results show that hole cleaning abilities of the tested fluids vary significantly with well angle, drill string rotation and flow rate. Results support field experience showing that low viscous fluids are more efficient than viscous fluids at higher flow rates and low drill string rotation. As well as per field experience more viscous fluids are efficient in combination with high drill string rotation rates. The results show the effect of cuttings transport efficiency as function of hydraulic frictional pressure drop, demonstrating methods to achieve more optimal hydraulic design in the tested conditions. The key findings have direct relevance to drilling operations.

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Section: Circulation Pressure Dropmentioning

confidence: 95%

Section: Circulation Pressure Dropmentioning

confidence: 99%

Oil-Based Drilling Fluid's Cuttings Bed Removal Properties for Deviated Wellbores

Ytrehus

Lund

Taghipour

et al. 2021

Journal of Energy Resources Technology

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show abstract

“…Haciislamoglu and Langlinais [12] and Haciislamoglu and Cartalos [13] presented models for pressure loss corrections for eccentric annuli in laminar and turbulent flow. These models are presented in Eqs.…”

Section: Corrections For Eccentricitymentioning

confidence: 99%

Annular Frictional Pressure Losses for Drilling Fluids

Saasen¹,

Ytrehus²

2021

Preprint

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In the paper, it is demonstrated how a Herschel-Bulkley fluid model, where the parameters are selected from relevant shear rate range of the flow and are parametrically independent, can be used for pressure loss calculations. The model is found to provide adequate pressure loss predictions for axial flow in an annulus where the inner cylinder does not rotate. It is described how one can simplify a slot model approximation of the annulus pressure loss using the Herschel-Bulkley fluid model (Founargiotakis model). This simplified model gives approximately the same accuracy as does the full Founargiotakis model. It is shown that the use of such a parallel plate model gives reasonably good fit to measured data on laminar flow of oil-based drilling fluids if the viscous data are measured at relevant shear rates for the flow. Laboratory measurements indicate that the use of the simplified pressure loss model is also valid for turbulent flow. However, the predictions should be adjusted for the surface roughness in the well.

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“…Additional pressure loss of eccentricity and drill pipe rotation: To calculate circulating loss more accurately, the effects of drill pipe eccentricity and rotation must be considered. The influence coefficient of drill pipe eccentricity is as follows (Haciislamoglu and Cartalos, 1994…”

Section: Mathematical Models Of Additional Pressure Lossmentioning

confidence: 99%

A Comprehensive Model for Circulating Pressure Loss of Deep-water Drilling and Its Application in Liwan Gas Field of China

Zhai¹,

Wang²

2014

RJASET

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Considering the special wellbore configuration and operating environment of deep-water drilling, a comprehensive model for circulating pressure loss of deep-water drilling is established. Based on fluid mechanics theory and heat transfer theory, wellbore temperature and pressure of riser section are calculated and a coupling approach is proposed. Comprehensive factors that affect circulating pressure loss of deep-water drilling are considered in this study. These factors are mud properties, flow regime, drill pipe rotation, drill pipe eccentricity, cuttings bed, tool joints, BHA (Bottom Hole Assembly), drill bit and surface pipeline. The model is applied to Liwan gas field of China. The results show that the data calculated by this model match the field data very well and the model can provide references for designing deep-water drilling hydraulic parameters.

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Practical Pressure Loss Predictions in Realistic Annular Geometries

Cited by 18 publications

References 0 publications

Oil-Based Drilling Fluid's Cuttings Bed Removal Properties for Deviated Wellbores

Oil-Based Drilling Fluid's Cuttings Bed Removal Properties for Deviated Wellbores

Annular Frictional Pressure Losses for Drilling Fluids

A Comprehensive Model for Circulating Pressure Loss of Deep-water Drilling and Its Application in Liwan Gas Field of China

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