Optical waveguide trapping forces on hollow glass spheres

2011 ◽  
Author(s):  
Pål Løvhaugen ◽  
Balpreet S. Ahluwalia ◽  
Olav G. Hellesø
Keyword(s):  
Optical Waveguide ◽  
Hollow Glass ◽  
Glass Spheres ◽  
Trapping Forces

Fatigue of hybrid epoxy composites: Epoxies containing rubber and hollow glass spheres

1996 ◽  
Vol 36 (18) ◽  
pp. 2352-2365 ◽  
Author(s):  
H. R. Azimi ◽  
R. A. Pearson ◽  
R. W. Hertzberg
Keyword(s):  
Epoxy Composites ◽  
Hollow Glass ◽  
Glass Spheres

Density and Drag Reduction With Hollow Glass Additives

2014 ◽  
Author(s):  
Bahri Kutlu ◽  
Evren M. Ozbayoglu ◽  
Stefan Z. Miska ◽  
Nicholas Takach ◽  
Mengjiao Yu ◽  
...  
Keyword(s):  
Drag Reduction ◽  
Rheological Behavior ◽  
Drilling Fluid ◽  
Hydraulic Drag ◽  
Effect Of Temperature ◽  
Survival Ratio ◽  
Fluid Density ◽  
Hollow Glass ◽  
Glass Spheres ◽  
Reduction Effect

This study concentrates on the use of materials known as hollow glass spheres, also known as glass bubbles, to reduce the drilling fluid density below the base fluid density without introducing a compressible phase to the wellbore. Four types of lightweight glass spheres with different physical properties were tested for their impact on rheological behavior, density reduction effect, survival ratio at elevated pressures and hydraulic drag reduction effect when mixed with water based fluids. A Fann75 HPHT viscometer and a flow loop were used for the experiments. Results show that glass spheres successfully reduce the density of the base drilling fluid while maintaining an average of 0.93 survival ratio, the rheological behavior of the tested fluids at elevated concentrations of glass bubbles is similar to the rheological behavior of conventional drilling fluids and hydraulic drag reduction is present up to certain concentrations. All results were integrated into hydraulics calculations for a wellbore scenario that accounts for the effect of temperature and pressure on rheological properties, as well as the effect of glass bubble concentration on mud temperature distribution along the wellbore. The effect of drag reduction was also considered in the calculations.

Preparation and characteristics of Fe3O4 magnetic thin films plated on hollow glass spheres

2007 ◽  
Vol 61 (7) ◽  
pp. 1529-1532 ◽  
Author(s):  
Jianhua Liu ◽  
Jing Wei ◽  
Songmei Li
Keyword(s):  
Thin Films ◽  
Magnetic Thin Films ◽  
Hollow Glass ◽  
Glass Spheres

Rheological Characterization of Suspension of Hollow Glass Beads

SPE Journal ◽  
2017 ◽  
Vol 22 (05) ◽  
pp. 1671-1680 ◽  
Author(s):  
Simone Lumsden ◽  
John P. Singh ◽  
Ronnie G. Morgan ◽  
Gregory Hundt
Keyword(s):  
Yield Stress ◽  
Surface Area ◽  
Unit Volume ◽  
Flow Behavior ◽  
Fluid Viscosity ◽  
Rheological Characterization ◽  
Concentrated Suspension ◽  
Hollow Glass ◽  
Glass Spheres ◽  
Liquid Suspension

Summary Hollow glass spheres (beads) are widely used as density and rheological modifiers for various oil and gas process fluids, particularly cement. One of the primary uses is to achieve lightweight slurries with good mechanical properties of the set cement. This paper discusses a concentrated, yet pumpable, suspension of these spheres for offshore cementing applications. Providing the lightweight spheres in a liquid suspension eliminates the risks associated with dry blending these materials. The development of the liquid suspension of hollow beads enables on-the-fly mixing of cement slurries with desired density profiles. Currently, the beads are premixed in the cement powder before they are shipped to offshore locations, which could result in the segregation of the beads during delivery and storage, and limits operations to the predetermined density (concentration of beads) of the slurry. This paper presents the rheological behavior of the concentrated suspension (up to 60% vol/vol) of hollow glass spheres suspended in a dilute aqueous solution of bentonite and soda ash. In addition, an attachment to the viscometer (called Fann Yield Stress Adaptor or FYSA) was used to characterize the flow behavior. A rheological model was developed to highlight the bead/bead surface interactions as a major component controlling flow behavior. Four different variants of beads were studied. These were selected to represent a range in surface area per unit volume of beads. Increasing the concentration of beads or the bentonite in solution correlated to increased yield stress and fluid viscosity at operational shear rates. In addition, a Krieger-Dougherty-type relation captured well the effect of the bead concentration, with the maximum packing fraction of beads as a function of surface area per unit volume of the beads. Overall, the Herschel-Bulkley (HB) model best described the suspension rheology with the shear-thinning exponent in the range of ≈0.8 to 1.0. Surface area of the beads linearly correlated to the yield stress of the corresponding concentrated bead solution. Results of this study and the model developed can be used to develop variants of the system with minimal experimentation, thus significantly shortening the design time.

Hollow glass spheres in sheet molding compound composites: Limitations and potential

2020 ◽  
Author(s):  
Arielle Berman ◽  
Edward DiLoreto ◽  
Robert J. Moon ◽  
Kyriaki Kalaitzidou
Keyword(s):  
Molding Compound ◽  
Hollow Glass ◽  
Sheet Molding Compound ◽  
Glass Spheres

Drilling with Glass and Air: Using Hollow Glass Spheres to Address a Wide Ranging Drilling Challenge in a Safe, Efficient and Cost-Effective Manner

2021 ◽  
Author(s):  
M.. Rylance ◽  
Y.. Tuzov ◽  
V.. Sherishorin
Keyword(s):  
Scale Up ◽  
Cost Savings ◽  
Cost Effective ◽  
Lessons Learned ◽  
Successful Outcome ◽  
Drilling Fluids ◽  
Eastern Siberia ◽  
Hollow Glass ◽  
Glass Spheres ◽  
Effective Manner

Abstract A major development with multiple rigs delivering extensive multi-laterals encountered a pervasive mud-window issue within the reservoir. The resulting severe mud losses, extensive NPT and formation-damage was also deteriorating with time due to depletion. Conventional approaches to stem losses had failed and adoption of an energized mud-system with acceptable Effective Circulating Density (ECD) was not considered cost effective, pragmatic nor safe. Instead a novel application using Hollow-Glass-Spheres (HGS) was trialled, that demonstrated an effective and highly successful outcome. With 10 rigs drilling 60-70 wells per-year, each with 5,500 to 6,750m in the reservoir, quick resolution of the issue was required. For these reasons the Team at bp Russia looked carefully at alternatives that might fit the mud-window, but that offered a realistic approach for the environment and conditions in Eastern Siberia. The Team identified HGS as an approach to lighten the mud, often used for cementing ECD, application for drilling has been limited. For this approach we required an option with broad capabilities that could be scaled-up and exported to other development areas where such issues existed. This paper will report on the planning, delivery, and execution of a pilot on the Sb. field at TYNGD, in Eastern Siberia. Initially deployed on three wells, including multi-laterals, the paper will walk through the engineering considerations, during the planning and execution phases. Reporting comprehensively on the data gathered and the many lessons learned during the incremental and stepwise deployment. Data will be provided that demonstrated loss-free drilling was achieved where this had not occurred before, with a dramatic reduction in NPT, FLA needs and costs. The paper will also report on the post drilling productivity and comparison with offset wells drilled with conventional mud systems and suffering severe losses. The results of this pilot have beaten all expectations, there have been many insights and the Team are now looking to set a timetable to scale-up across the NOJV. Much has been learned, waste HGS material has been demonstrated to be an effective FLA pill in other sections of the well and centralisation of mud process may offer additional cost savings and improvements. Further efficiencies are expected to be achieved and potential across the Company portfolio could be a major game changer. HGS for cementing is well documented, application for drilling fluids has been less reported and almost exclusively applied to one-off sections/wells. The TYNGD application is novel as this is a major new development with 10 drilling rigs. Application is on multi-laterals and prior offset wells are available for direct comparison. The results of the approach demonstrate a new way of performing well construction in an effective manner for major Field Developments where losses are prevalent.

Deformation behavior of composites based on low-density polyethylene and hollow glass spheres

2009 ◽  
Vol 82 (8) ◽  
pp. 1472-1478 ◽  
Author(s):  
N. R. Ponomareva ◽  
G. P. Goncharuk ◽  
Yu. A. Grigor’ev ◽  
E. S. Obolonkova ◽  
O. A. Serenko
Keyword(s):  
Deformation Behavior ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Hollow Glass ◽  
Glass Spheres
Sign in / Sign up

Export Citation Format

Share Document