Drill Pipe Rotation Effects on Frictional Pressure Losses in Slim Annuli

Hansen, Svein; Sterri, N.

doi:10.2523/30488-ms

Cited by 7 publications

(4 citation statements)

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“…The experiments were con ducted using Newtonian and non-Newtonian fluids. A year later, another experimental study [11] was undertaken to determine the effect of pipe rotation and pipe eccentricity on pressure losses in narrow annuli. The fluids used in this experiment were nonNewtonian and best fit the power law model.…”

Section: Laboratory Studiesmentioning

confidence: 99%

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Annular Frictional Pressure Losses During Drilling—Predicting the Effect of Drillstring Rotation

Saasen

2014

Journal of Energy Resources Technology

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Controlling the annular frictional pressure losses is important in order to drill safely with overpressure without fracturing the for mation. To predict these pressure losses, however, is not straight forward. First of all, the pressure losses depend on the annulus eccentricity. Moving the drillstring to the wall generates a wider flow channel in part of the annulus which reduces the frictional pressure losses significantly. The drillstring motion itself also affects the pressure loss significantly. The drillstring rotation, even for fairly small rotation rates, creates unstable flow and sometimes turbulence in the annulus even without axial flow.Transversal motion o f the drillstring creates vortices that destabi lize the flow. Consequently, the annular frictional pressure loss is increased even though the drilling fluid becomes thinner because of added shear rate. Naturally, the rheological properties of the drilling fluid play an important role. These rheological properties include more properties than the viscosity as measured by API procedures. It is impossible to use the same frictional pressure loss model for water based and oil based drilling fluids even if their viscosity profile is equal because o f the different ways these fluids build viscosity. Water based drilling fluids are normally constructed as a polymer solution while the oil based are combi nations o f emulsions and dispersions. Furthermore, within both water based and oil based drilling fluids there are functional dif ferences. These differences may be sufficiently large to require different models for two water based drilling fluids built with dif ferent types of polymers. In addition to these phenomena washouts and tool joints will create localised pressure losses. These local ised pressure losses will again be coupled with the rheological properties of the drilling fluids. In this paper, all the above men tioned phenomena and their consequences for annular pressure losses will be discussed in detail. North Sea field data is used as an example. It is not straightforward to build general annular pressure loss models. This argument is based on flow stability analysis and the consequences o f using drilling fluids with differ ent rheological properties. These different rheological properties include shear dependent viscosity, elongational viscosity and other viscoelastic properties.

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Section: Laboratory Studiesmentioning

confidence: 99%

“…A large number of laboratory stud ies [10][11][12][13][14][15][16][17][18] were carried out to evaluate the effect of pipe rotation on annular pressure loss. Most of these studies demonstrate both negative and positive effects of the rotation speed.…”

Section: Laboratory Studiesmentioning

confidence: 99%

Annular Frictional Pressure Losses During Drilling—Predicting the Effect of Drillstring Rotation

Saasen

2014

Journal of Energy Resources Technology

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“…Other issues that make the estimation of pressure losses in drilling holes difficult are the eccentricity and the rotational speed of inner drill pipe. Many studies have been done on the flow of non-Newtonian fluids in annuli to introduce empirical/ analytical models which allow to take these effects into account [1,[3][4][5][6][7][8][9][10]. e results of the previous studies show that the annular pressure losses for non-Newtonian (power law) fluids flowing in a drill hole depend on drill pipe rotation speed, fluid properties, flow regimes (laminar/ transitional/turbulent), diameter ratio, eccentricity, and equivalent hydrodynamic roughness.…”

Section: Literature Reviewmentioning

confidence: 99%

CFD Analysis of Pressure Losses and Deposition Velocities in Horizontal Annuli

Sultan¹,

Rahman

Rushd

et al. 2019

International Journal of Chemical Engineering

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Estimation of pressure losses and deposition velocities is vital in the hydraulic design of annular drill holes in the petroleum industry. The present study investigates the effects of fluid velocity, fluid type, particle size, particle concentration, drill string rotational speed, and eccentricity on pressure losses and settling conditions using computational fluid dynamics (CFD). Eccentricity of the drill pipe is varied in the range of 0–75%, and it rotates about its own axis at 0–150 rpm. The diameter ratio of the simulated drill hole is 0.56. Experimental data confirmed the validity of current CFD model developed using ANSYS 16.2 platform.

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“…Researchers focus on the study of pipe/annular pressure loss very early (Fredrickson and Bird, 1958;Zamora and Lord, 1974) and most of the study were limited to the fluid properties and flow regime (Demirdal and Cunha, 2007;Kelessidis et al, 2011). With the development of the drilling technology, researcher found that variations in annular geometry, drill pipe rotation and eccentricity strongly affect pressure loss during drilling, but most of them were only suited to slimhole well (McCann et al, 1995;Hansen and Sterri, 1995;Ooms and Kampman-Reinhartz, 2000;Ozbayoglu and Sorgun, 2010). Cartalos and Dupuis (1993) noted that the variations in annular clearance such as tool-joint have consequences on the annular pressure loss.…”

Section: Introductionmentioning

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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Drill Pipe Rotation Effects on Frictional Pressure Losses in Slim Annuli

Cited by 7 publications

References 0 publications

Annular Frictional Pressure Losses During Drilling—Predicting the Effect of Drillstring Rotation

Annular Frictional Pressure Losses During Drilling—Predicting the Effect of Drillstring Rotation

CFD Analysis of Pressure Losses and Deposition Velocities in Horizontal Annuli

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

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