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Recent content by samlukeben

  1. samlukeben

    Fracture modeling

    Does anyone know how to convert the non Darcy flow factor, Beta, from units of atm·s²/g to units of /ft ? It's not obvious how you would do this, and an internet trawl has so far failed to help...
  2. samlukeben

    N2 injection to decrease water production

    Tried it in a subsea gas field development via the flow line - didn't work very well at all. In the final analysis it was considered that the relperm was not changed significantly to rejuvenate the wells. You might consider the addition of a chemical relperm modifier to the nitrogen which may...
  3. samlukeben

    Looking for water cut sensors

    The Expro Group produce a downhole, full fraction water cut meter. (Although this technology may have gone to Quantx, part of the Baker Hughes Inteq group of companies)Advantageous when you need to determine water cut contributions in a multilateral well or where you have comingled well fluids...
  4. samlukeben

    Gas Lifted Completion

    does anyone have any advice or practical experience of designing a gas lifted oil producer where the lift gas is injected down the tubing and poduction is via the annulus.
  5. samlukeben

    Completion Diagrams - Wireline Toolstrings

    In order to visualise a new completion or wireline toolstring I have drawn a fairly limited suite of Microsoft Visio Stencils and Visio templates to represent packers, DHSV, GLM, Casing strings, etc. I know Woodside in Australia did a similar thing many moons ago. I'm trying to acquire more...
  6. samlukeben

    Solids Transportation Calcs

    Can anyone help? I'm trying to determine the minimum velocity at which sand will begin to flow with the carrying fluid. I have access to all the necessary data e.g particle size distribution, densities, viscosity of carrying media, temperatures, pressures etc etc...and fluid velocity and flow...
  7. samlukeben

    Line Pipe Allowable velocity

    Erosion corrosion is acceleration in the rate of corrosion attack in metal due to the relative motion of a corrosive fluid and a metal surface. The increased turbulence caused by pitting on the internal surfaces of a tube can result in rapidly increasing erosion rates. Erosion corrosion can also...
  8. samlukeben

    Completion Design

    Hi, I would like to conduct a quick “Straw Poll” of members involved in completion design as to the practical benefits of using “Flow Couplings” either side of a subsea safety valve. I understand the rationale behind their use in high velocity/turbulent flow areas of a completion, however, is...
  9. samlukeben

    Galvanic Corrosion Potential

    Many thanks for the help....one further question...the components being utilised will be installed into a water injection well where the electrolyte will be de-oxygenated seawater. I presume that with the reduction of oxygen there should be a corresponding reduction in the corrosion rate?..........
  10. samlukeben

    Galvanic Corrosion Potential

    I would like to assess the likelyhood of galvanic corrosion taking place between a High Alloy super duplex steel (Alloy 255) and a Grey Cast Iron in a marine environment. I understand that the galvanic potential is related to the "nobility" of the metals in question. However, I would...
  11. samlukeben

    GRE Lined Tubing

    No, specifically a product called "Duoline". The company that produces the material inserts the GRE liner into Premium Tubulars used in oilfiled completions. This is of great benefit in reducing costs when wells which require exotic alloys for corrosion resistance are required, lower...
  12. samlukeben

    GRE Lined Tubing

    Can anyone give me any advice regarding the erosion resistance of GRE tubing with respect to fluid velocity and time. (Fluid type : sea water). Also, any information regarding the GRE stability under vacuum?
  13. samlukeben

    Hydrofluoric Acid

    Hydrofuoric Acid is normally produced from a mixture of Fluorospar and Sulphuric Acid and subsequent fractional distillation process. On this basis I would assume HF is not naturally occuring. It is classed as a "weak" highly undissociated acid which will attack glass or silica on...
  14. samlukeben

    Downhole heating systems

    Does anyone have information relating to downhole heating systems/techniques which provide localised heat (at the BHA) into the formation to enable viscosity reduction in heavy API crude environments around the well bore.
  15. samlukeben

    Molecular Weight Measurement

    Gas molecular weight is an indirect measure of gas density or gas gravity. Gas gravity is the relationship - ( density of the subject gas / density of air at std Conds.) or similarly the (molecular weight of the subject gas / Molecular weight of air at st.conds). Therefore if you measure the gas...
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