The Experts below are selected from a list of 45 Experts worldwide ranked by ideXlab platform

Thomas B. Martin - One of the best experts on this subject based on the ideXlab platform.

Andre Leibsohn Martins - One of the best experts on this subject based on the ideXlab platform.

  • Building a Better Pack Using a Solid-Free Non-Aqueous Carrier Fluid for α-β wave gravel packs
    2020
    Co-Authors: Lirio Quintero, Alexander J. Mckellar, Jason Maxey, Allen D. Gabrysch, Lima Aragao, Agostinho Calderon, Andre Leibsohn Martins
    Abstract:

    The operational practice of drilling wells with a Nonaqueous Fluid (NAF) followed by traditional completion brine carrier Fluid concerns the operators when the borehole section has interbedded shales. Also, a large number of production wells in sandstone reservoirs require sand control due to the poorly consolidated formations, and open-hole gravel pack (OHGP) is still a popular sand control method. Significant progress has been made in the development of Fluid systems for gravel packing with either water-based or oil-based Fluid. However, drilling of build-up and horizontal sections in a single step, followed by alpha-beta wave gravel pack, is still a challenge that requires a Newtonian NAF Fluid. In order to guarantee superior wellbore stability, lubricity, and shale inhibition in those long sections, a new type of Nonaqueous Fluids with internal phase brine were developed for use as a carrier medium to perform alpha-beta wave gravel packs. These Fluids are designed to provide Newtonian behavior, minimum viscosity, proper gravel wetting and minimum formation damage. This article presents the results on the optimization of the low shear rheological behavior of the non-aqueous gravel carrier Fluid. Selected carrier Fluids formulations were evaluated for use as a gravel pack carrier Fluid in a large-scale acrylic flow loop. The results showed that a proper alpha-beta wave gravel deposition is obtained with the designed NAF that have minimal viscosity variation at low shear rate.

Michael T. Hecker - One of the best experts on this subject based on the ideXlab platform.

Stephen D. Jacobs - One of the best experts on this subject based on the ideXlab platform.

  • Contributions of nanodiamond abrasives and deionized water in magnetorheological finishing of aluminum oxynitriden
    Proceedings of SPIE, 2009
    Co-Authors: Chunlin Miao, Henry J. Romanofsky, John C. Lambropoulos, Shai N. Shafrir, Stephen D. Jacobs
    Abstract:

    ABSTRACT Magnetorheological finishing (MRF) is a sub-aperture deterministic process for fabricating high-precision optics by removing material and smoothing the surface. The goal of this work is to study the relative contribution of nanodiamonds and water in material removal for MRF of aluminum oxynitride ceramic (ALON) based upon a Nonaqueous magnetorheological (MR) Fluid. Removal was enhanced by a high carbonyl iron concentration and the addition of nanodiamond abrasives. Sma ll amounts of deionized (DI) water were introduced into the Nonaqueous MR Fluid to further influence the material removal process. Materi al removal data were collected with a spot-taking machine. Drag force (F d ) and normal force (F n ) before and after adding nanodiamonds or DI water were measured with a dual load cell. Both drag force and normal force were insensitive to the addition of nanodiamonds but increased with DI water content in the Nonaqueous MR Fluid. Shear stress (i.e., drag force divided by spot area) was calculated, and examined as a function of nanodiamond concentration and DI water concentration. Volumetric removal rate increased with increasing shear stress, which was shown to be a result of increasing viscosity after adding nanodiamonds and DI water. This work demonstrates that removal rate for a hard ceramic with MR F can be enhanced by adding DI water into a Nonaqueous MR Fluid. Key words: magnetorheological finishing (MRF), viscosity, drag forc e, shear force, normal force, coefficient of friction, Nonaqueous Fluid, chemical mechanical polishing, aluminum oxynitride (ALON)

  • Material removal during magnetorheological finishing (MRF)
    Optical Manufacturing and Testing III, 1999
    Co-Authors: Aril B. Shorey, Leslie L. Gregg, Henry J. Romanofsky, Steven R. Arrasmith, Irina A. Kozhinova, Joshua Hubregsen, Stephen D. Jacobs
    Abstract:

    Magnetorheological Finishing (MRF) is a newly developed and recently commercialized method for finishing optical components. The MR Fluid consists of a water based suspension of carbonyl iron (CI), nonmagnetic polishing abrasives, and small amounts of stabilizers. MRF uses both mechanics and chemistry to smooth glass surfaces to less than 10 angstrom rms. Mechanics are responsible for the microscratching of the glass surface which is initially 'softened' by hydration from water in the MR Fluid. Experiments were performed to study the separate roles of mechanical abrasion and chemical softening during MRF. Chemical effects were suppressed by introducing a Nonaqueous Fluid in place of the water. A novel nanoindentation technique was used to determine CI particle hardness, which varied by a factor of five. The mechanics of removal were then investigated with soft and hard CI powders working against soft and hard optical glasses. Chemistry was then 'turned on' by the addition of a small amount of water to the system. Preliminary results of these experiments are presented here.

Lirio Quintero - One of the best experts on this subject based on the ideXlab platform.

  • Building a Better Pack Using a Solid-Free Non-Aqueous Carrier Fluid for α-β wave gravel packs
    2020
    Co-Authors: Lirio Quintero, Alexander J. Mckellar, Jason Maxey, Allen D. Gabrysch, Lima Aragao, Agostinho Calderon, Andre Leibsohn Martins
    Abstract:

    The operational practice of drilling wells with a Nonaqueous Fluid (NAF) followed by traditional completion brine carrier Fluid concerns the operators when the borehole section has interbedded shales. Also, a large number of production wells in sandstone reservoirs require sand control due to the poorly consolidated formations, and open-hole gravel pack (OHGP) is still a popular sand control method. Significant progress has been made in the development of Fluid systems for gravel packing with either water-based or oil-based Fluid. However, drilling of build-up and horizontal sections in a single step, followed by alpha-beta wave gravel pack, is still a challenge that requires a Newtonian NAF Fluid. In order to guarantee superior wellbore stability, lubricity, and shale inhibition in those long sections, a new type of Nonaqueous Fluids with internal phase brine were developed for use as a carrier medium to perform alpha-beta wave gravel packs. These Fluids are designed to provide Newtonian behavior, minimum viscosity, proper gravel wetting and minimum formation damage. This article presents the results on the optimization of the low shear rheological behavior of the non-aqueous gravel carrier Fluid. Selected carrier Fluids formulations were evaluated for use as a gravel pack carrier Fluid in a large-scale acrylic flow loop. The results showed that a proper alpha-beta wave gravel deposition is obtained with the designed NAF that have minimal viscosity variation at low shear rate.