Blar i NTNU Open på forfatter "Lund, Bjørnar"
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A new approach to dynamic barite sag analysis on typical Field oil-based drilling fluid
Ofei, Titus Ntow; Lund, Bjørnar; Saasen, Arild; Sangesland, Sigbjørn; Gyland, Knud Richard; Linga, Harald (Chapter, 2019)Laboratory and field experiences record that sagging of weighting agents such as barite in drilling fluids is often worse in dynamic conditions, e.g. pumping, tripping or drill pipe rotation, than in static conditions. ... -
Analysis of cuttings concentration experimental data using exploratory data analysis
Chowdhury, Dipankar; Hovda, Sigve; Lund, Bjørnar (Peer reviewed; Journal article, 2022)Cuttings transportation is a complex phenomenon involving many inter-acting variables. Experimental investigations on cuttings transport are carried out by different research groups for decades and varying findings are ... -
Effect of Barite on the Rheological Properties of an Oil-Based Drilling Fluid
Ofei, Titus Ntow; Lund, Bjørnar; Gyland, Knud Richard; Saasen, Arild (Peer reviewed; Journal article, 2020) -
Effect of Preconditioning and Ageing on Rheological Properties of Model Drilling Fluids
Werner, Benjamin; Lund, Bjørnar; Kosberg, Birgitte; Johansen, Espen; Giil, Gunnar Lia; Ytrehus, Jan David (Chapter, 2017)Many drilling fluids are thixotropic, meaning that viscosity decreases with time when subjected to shear. Other fluids may show anti-thixotropic (rheopectic) behavior, i.e. viscosity increase with time when subjected to ... -
Experimental Bench-Scale Study on Cuttings-Bed Erosion in Horizontal Wells
Pedrosa Consicion, Herman Camilo; Lund, Bjørnar; Opedal, Nils van der Tuuk; Ytrehus, Jan David; Saasen, Arild (Peer reviewed; Journal article, 2022)Cuttings-beds formation while drilling wellbores is a common challenge, especially for horizontal wells, as drilled particles have higher area to be deposited and form cuttings-beds, which can cause several problems such ... -
Experimental study of the use of tracing particles for interface tracking in primary cementing in an eccentric hele–shaw cell
Taheri, Amir; Ytrehus, Jan David; Lund, Bjørnar; Torsæter, Malin (Peer reviewed; Journal article, 2021)We present the results of the displacement flows of different Newtonian and Herschel–Bulkley non-Newtonian fluids in a new-developed eccentric Hele–Shaw cell with dynamic similarly to real field wellbore annulus during ... -
Hole-cleaning performance comparison of oil-based and water-based drilling fluids
Sayindla, Sneha; Lund, Bjørnar; Ytrehus, Jan David; Saasen, Arild (Journal article, 2017)Cuttings transport is a topic of great interest in the oil and gas drilling industry. Insufficient cuttings transport leads to several expensive problems. Knowledge and selection of the drilling fluids is one of the important ... -
Laboratory Evaluation of Static and Dynamic Sag in Oil-Based Drilling Fluids
Ofei, Titus Ntow; Kalaga, Dinesh V.; Lund, Bjørnar; Saasen, Arild; Linga, Harald; Sangesland, Sigbjørn; Gyland, Knud Richard; Kawaji, Masahiro (Journal article; Peer reviewed, 2020)In this paper, we present the results of barite sag measurements before and after hot-rolled oil-based drilling fluids (OBDFs) using different approaches for characterization. We characterized the barite sag of a liquid ... -
On the Stability of Oil-Based Drilling Fluid: Effect of Oil-Water Ratio
Ofei, Titus Ntow; Cheng, Itung; Lund, Bjørnar; Saasen, Arild; Sangesland, Sigbjørn (Chapter, 2020)Drilling fluids are complex mixtures of natural and synthetic chemical compounds used to cool and lubricate the drill bit, clean the wellbore, carry drilled cuttings to the surface, control formation pressure, and improve ... -
Use of concentric hele-shaw cell for the study of displacement flow and interface tracking in primary cementing
Taheri, Amir; Ytrehus, Jan David; Lund, Bjørnar; Torsæter, Malin (Peer reviewed; Journal article, 2021)We present our new designed concentric Hele-Shaw cell geometry with dynamic similarity to a real field wellbore annulus during primary cementing, and then, the results of displacement flow of Newtonian and yield-stress ... -
Use of Tracer Particles for Tracking Fluid Interfaces in Primary Cementing
Taheri, Amir; Ytrehus, Jan David; Taghipour, Ali; Lund, Bjørnar; Lavrov, Alexandre; Torsæter, Malin (Chapter, 2019)In this study, a new approach for detailed tracking of the interface between well fluid and cement by using particles is investigated. This can improve the quality of annular cementing of CO2 wells and thus the storage ... -
Wet Drilled Cuttings Bed Rheology
Pedrosa, Camilo; Saasen, Arild; Lund, Bjørnar; Ytrehus, Jan David (Peer reviewed; Journal article, 2021)The cuttings transport efficiency of various drilling fluids has been studied in several approaches. This is an important aspect, since hole cleaning is often a bottleneck in well construction. The studies so far have ... -
Wet-granular rheology to measure cuttings-bed strength
Pedrosa, Camilo; Ytrehus, Jan David; Aschl, Timothy; Lund, Bjørnar; Saasen, Arild (Journal article; Peer reviewed, 2021)