2021
DOI: 10.1115/1.4050385
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Oil-Based Drilling Fluid's Cuttings Bed Removal Properties for Deviated Wellbores

Abstract: 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 (… Show more

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Cited by 10 publications
(8 citation statements)
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“…The term implies that all cuttings particles are sedimented on the low side of the annulus with a bed porosity. Measurement of the test section weight, mass balance, and a representative bed porosity is used to derive this factor [2,3]. The contribution of the suspended particles to the mass balance is relatively small and should not give significant inaccuracies.…”
Section: Resultsmentioning
confidence: 99%
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“…The term implies that all cuttings particles are sedimented on the low side of the annulus with a bed porosity. Measurement of the test section weight, mass balance, and a representative bed porosity is used to derive this factor [2,3]. The contribution of the suspended particles to the mass balance is relatively small and should not give significant inaccuracies.…”
Section: Resultsmentioning
confidence: 99%
“…The drill string is represented by a steel rod of Di = 50.4 mm diameter inside the wellbore and defining the inner diameter of the annular test section. For additional information about the experimental equipment please consult Ytrehus et al [3]. In agreement with Li and Luft [1], Saasen [4] concluded that "even though laboratory experiments are necessary to improve the understanding of well flow phenomena, is not straightforward to use experimental results directly to create correlations.…”
Section: Experimental Equipment and Fluid Design 21 Experimental Designmentioning
confidence: 91%
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“…They found that low-viscosity fluids are more efficient than viscous fluids at higher flow rates and low drill-string rotation. Different fields have applied oil-based drilling fluids with similar weights and varying viscosities, and positive results have been shown for cutting transport performance, hole-cleaning abilities, and hydraulic frictional pressure drop [50,51]. Pedrosa et al (2022) investigated the influence of the rheological properties of three different types of fluids on the erodibility of the cutting bed.…”
Section: Status Of Hole-cleaning Modelsmentioning
confidence: 99%
“…In 2018-2019 a group of international researchers published the results of the effect of rotation of the DF on cleaning the well with the use of polypropylene particles in DF at different zenith angles [26][27][28]. In 2020-2021 a group of Norwegian scientists published the results [29,30] of hydraulic studies and mud transport with oil-based solutions in deviated wells, using a large-scale laboratory facility developed with the support of Aker BP and M-I SWACO. The above studies confirmed the presence of critical zenith angles of the well trajectory, described the effect of the rotation speed of the drilling rig, volumetric flow, technological and mud rheological properties on the quality of wellbore cleaning of cuttings.…”
Section: Introductionmentioning
confidence: 99%