A New Model for Laminar, Transitional, and Turbulent Flow of Drilling Muds

Reed, T. David; Pilehvari, Ali

doi:10.2118/25456-ms

Cited by 92 publications

(32 citation statements)

References 22 publications

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“…full rheograms of the tested fluids are normally missing from these publications. Reed and Pilehvari (1993) presented a fairly complex model covering laminar, transitional and turbulent flows of HerschelBulkley fluids flowing in concentric annuli. Subramanian and Azar (2000) have presented experimental data but with limited information on the fluid properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental study and predictions of pressure losses of fluids modeled as Herschel–Bulkley in concentric and eccentric annuli in laminar, transitional and turbulent flows

Kelessidis

Dalamarinis

Maglione³

2011

Journal of Petroleum Science and Engineering

117

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Section: Introductionmentioning

confidence: 99%

Experimental study and predictions of pressure losses of fluids modeled as Herschel–Bulkley in concentric and eccentric annuli in laminar, transitional and turbulent flows

Kelessidis

Dalamarinis

Maglione³

2011

Journal of Petroleum Science and Engineering

117

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“…As seen earlier when applying MPD training in the simulator, the focus has been on the operational procedures and contingency procedures 4 . The focus for the DGD training has been to familiarize the drilling team with the new technology and train on the new and different procedures.…”

Section: Training Philosophymentioning

confidence: 99%

A Dynamic Dual Gradient Model and its Use for Training Prior to DGD Operations in Norway and GoM

Svendsen

Bjorkevoll

Rommetveit

et al. 2015

Day 1 Tue, March 17, 2015

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A very realistic training simulator for dual gradient drilling has been developed, and then utilized for training. Realism in the responses that trainees see is ensured by embedding advanced real time downhole mathematical models, which are set up with the planned configuration for each upcoming well.Dual Gradient Drilling (DGD) capabilities have been developed into an already proven dynamic hydraulic and temperature model. The flexibility of the model allows incorporating additional pumps in the flow, as in Dual Gradient Systems. The model includes dynamic 2-D temperature calculations, covering the radial area affecting the well. To create the Dual Gradient functionality a subsea pump module was developed, including the mud return line. To assure that the simulator behaves realistically extensive work was done, including implementation and verification of the U-tubing effects in the system. The model has been implemented into a virtual reality training simulator which also includes a full 3D topside drilling environment and 3D downhole visualization model. This unique DGD training simulator has been utilized for training the drilling teams (both drilling team and DGD operational team). First training for operations utilizing the Controlled Mud Level (CML) system in Norway was developed around the training simulator. Then a further development was done prior to DGD operations in GoM, integrating a quick closing annular as well as booster line functionality. The training course was created around the Dual Gradient procedures, including the contingencies procedures with a focus on the communication between the different parties in the DGD operation.The paper presents the model basis and how this is implemented into an advanced virtual reality training simulator which enable accurate modelling of the upcoming well. Furthermore, the training process of the drilling crews will be presented including lessons learned.

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“…To apply the Haciislamoglu and Langlinais (1990) correlation, it is assumed that the concentricannulus-pressure gradient is either known or can be predicted accurately using published or proprietary correlations, which is a major setback. However, on the basis of comparison with simulation and experimental data, Singhal et al (2005) recommended the use of correlations developed by Reed and Pilehvari (1993) for laminar flow of non-Newtonian fluids in a concentric annulus. The Reed and Pilehvari (1993) approach was developed using Exlog staff (1985) correlations obtained from the analytical solution of Fredrickson and Bird (1958).…”

Section: Literature Reviewmentioning

confidence: 99%

“…However, on the basis of comparison with simulation and experimental data, Singhal et al (2005) recommended the use of correlations developed by Reed and Pilehvari (1993) for laminar flow of non-Newtonian fluids in a concentric annulus. The Reed and Pilehvari (1993) approach was developed using Exlog staff (1985) correlations obtained from the analytical solution of Fredrickson and Bird (1958). They introduced a new effective-diameter (d eff ) concept for the flow of non-Newtonian fluids through annuli.…”

Section: Literature Reviewmentioning

confidence: 99%

Laminar and Turbulent Friction Factors for Annular Flow of Drag-Reducing Polymer Solutions in Coiled-Tubing Operations

Ogugbue

Shah

2011

SPE Drilling &Amp; Completion

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The challenge of theoretical and numerical studies of annular fluid flow with varying eccentricity is mainly a result of the required coordinate systems. Computational-fluid-dynamics (CFD) modeling provides the state-of-the-art approach of investigating fluid flow in such complex geometries. In this study, results from a series of numerical simulations for the fully developed laminar flow of non-Newtonian power-law fluids in concentric and eccentric annular geometries are used to investigate the effect of eccentricity, flow-behavior index, and diameter ratio (ratio of the outer diameter of the inner tubing to the inner diameter of the outer tubing) on axial frictional pressure losses.The frictional pressure-loss gradients predicted by the CFD simulations were verified by comparing with the published studies and flow data from a field-scale experimental setup. At a constant flow rate, it is confirmed that frictional pressure losses decrease with increasing eccentricity. A good agreement was obtained with the Haciislamoglu and Langlinais (1990) correlation, and the results of this study, especially at low values of eccentricity. At very high eccentricities, data from the CFD model yield lower frictional pressure loss compared to Haciislamoglu and Langlinais (1990) correlation. This type of expression is obtained and the improved data of this study is incorporated.Next, this paper presents the results of an experimental study carried out to investigate frictional pressure-loss behavior of dragreducing polymer solutions, flowing turbulently through an eccentric annulus. The experimental setup includes 30 ft of 3½ × 2 3 ⁄8-in., 200 ft of 3½ × 1¾-in., 69 ft of 5½ × 4-in., and 79 ft of 5 × 3½-in. fully eccentric annuli. Data analysis enabled the development of a new correlation using fluid apparent viscosity at 511 sec -1 , generalized Reynolds number, and diameter ratio, all of which can be easily determined in the field as independent variables. These new correlations for laminar and turbulent flow of drag-reducing polymer solutions present an improvement to existing correlations, and also permit undemanding hydraulic-program calculations for varying annular configurations.

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A New Model for Laminar, Transitional, and Turbulent Flow of Drilling Muds

Cited by 92 publications

References 22 publications

Experimental study and predictions of pressure losses of fluids modeled as Herschel–Bulkley in concentric and eccentric annuli in laminar, transitional and turbulent flows

Experimental study and predictions of pressure losses of fluids modeled as Herschel–Bulkley in concentric and eccentric annuli in laminar, transitional and turbulent flows

A Dynamic Dual Gradient Model and its Use for Training Prior to DGD Operations in Norway and GoM

Laminar and Turbulent Friction Factors for Annular Flow of Drag-Reducing Polymer Solutions in Coiled-Tubing Operations

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