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RISAnnular Frictional Pressure Losses During Drilling—Predicting the Effect of Drillstring Rotation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Controlling the annular frictional pressure losses is important in order to drill safely with overpressure without fracturing the formation. To predict these pressure losses, however, is not straightforward. First of all, ...
On the Use of Pyranometers in the Study of Spectral Solar Radiation and Atmospheric Aerosols
Publisher: American Meteorological Society
Abstract: The zero-point deviation of Eppley precision spectral pyranometers is considered for different types of Schott filter glass hemispheres. It is found that the zero-point deviation may significantly affect the measurements ...
Effect of Zn2+ and K+ as Retarding Agents on Rock-Based Geopolymers for Downhole Cementing Operations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Geopolymer material has a potential to function alongside Portland Cement as an efficient cementitious material for well cementing and plug and abandonment applications. Geopolymer material requires retarding agents to be ...
Comparison of Lost Circulation Material Sealing Effectiveness in Water-Based and Oil-Based Drilling Fluids and Under Conditions of Mechanical Shear and High Differential Pressures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A study was conducted to assess the performance of granular and fibrous lost circulation materials as preventative treatments and in remedial treatment of lost circulation in water-based and oil-based drilling fluids. For ...
The Role of Particle Size Distribution for Fluid Loss Materials on Formation of Filter-Cakes and Avoiding Formation Damage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Numerous studies have shown that careful particle size selection is the main parameter for reducing fluid loss when drilling permeable or fractured formations. The methods are generally built around either the D50 or D90 ...
Shielding of Directional Magnetic Sensor Readings in a Measurement While Drilling Tool for Oil Well Positioning
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Magnetic materials in the drilling fluid used for drilling a petroleum well can significantly shield the Earth’s magnetic field as measured by magnetic sensors inside the drilling pipe. This ...
Effect of Material and Geometry Variations on Beam under Patch Loading
Publisher: American Society of Civil Engineers
Abstract: This work was initiated to study the influence of geometry and material variations on the structural response of an aluminum I-beam subjected to concentrated loading. The beam behavior was computed with a previously validated ...
Turbulent Upper-Ocean Mixing Affected by Meltwater Layers during Arctic Summer
Publisher: American Meteorological Society
Abstract: very summer, intense sea ice melt around the margins of the Arctic pack ice leads to a stratified surface layer, potentially without a traditional surface mixed layer. The associated strengthening of near-surface stratification ...
Parameterization of an Iceberg Drift Model in the Barents Sea
Publisher: American Meteorological Society
Abstract: The problem of parameter estimation is examined for an iceberg drift model of the Barents Sea. The model is forced by atmospheric reanalysis data from ECMWF and ocean and sea ice variables from the Hybrid Coordinate Ocean ...
Annular Frictional Pressure Losses for Drilling Fluids
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: 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. ...