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  • Users: d23
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  1. d23

    tubing leaking

    MOSTAFA86 Look at your pump curve. How much power did it require when it was operating correctly? Using the curve how much power would it require at the maximum flow rate plotted on the curve? This will tell you if the power should go up or down with a tubing leak. Below are general...
  2. d23

    Esp flow rate

    MOSTAFA86 zdas04 is absolutely correct about gas and that is likely 90% of your problem. You stated a FVF OF 1.15 SCF/BBL. I would guess that is oil only. Do you have the water volume factor? Are the volume factors a calculation made from a correlation or an actual PVT test? To further...
  3. d23

    Submersible induction motor surface voltage calculations

    1gibson There is a change in slip. Most submersible motors in the petroleum industry operate between 3450 and 3500 RPM (two pole) at 60 Hertz full load. Slip for a typical TEFC induction motor includes windage drag which is usually a minimum value. For a submersible motor, filled with...
  4. d23

    Submersible induction motor surface voltage calculations

    1gibson That is an over simplified question to a very complex problem. I will try to give you a generalized answer without writing a book. Submersible motor basics: 1. Submersible induction motors used in the petroleum industry typically range from 1 kV to 4 kV nameplate volts at 60 Hertz...
  5. d23

    Submersible induction motor surface voltage calculations

    MOSTAFA86 It usually doesn’t make much difference, so I would suggest using nameplate amps. If you look at a volt loss chart you will find it will only be 1 to 2 percent difference unless you have a very lightly loaded motor. If you have a lightly loaded motor, say a 100 HP motor with a 50 HP...
  6. d23

    Lasater PVT

    All, Does someone have Lasater Pb calculation in an EXCEL file that they could share? Thanks
  7. d23

    Auto Run Macro

    For what it's worth I have 81 rows of inputs on sheet 1. There are another 10 sheets performing dynamic calculations based on the 100+ inputs on sheet 1. The worst calculation sheet (named friction) starts on cell A1 and ends on cell EK310. Through the calculations I must predict rotating...
  8. d23

    Auto Run Macro

    All, This is what I have and it is working: Private Sub Worksheet_Calculate() Application.EnableEvents = False Call Speed Application.EnableEvents = True End Sub
  9. d23

    Auto Run Macro

    MintJuelep It took a few minutes to figure out how to write it, but it works. One Star for you! David
  10. d23

    Auto Run Macro

    All, I need to run a macro anytime a cell value changes, but the cell is a formula, not just a static value. I have tried the following code and it works fine if I manually enter a value in the target cell, but if I use a formula in the target cell it does not work. Is there a way to run the...
  11. d23

    ESP underload question.

    ahendawy85 In general the statement is true for ESP’s. This statement assumes the underlaod has been properly set. At 0 flow (Closed Valve) the power required will be minimal. The motor seal assembly, intake, pump and induction motor all have losses when operating at very low flows and...
  12. d23

    Too Old for work?

    I would say most service companies would talk with you for a sales position. Baker, Halliburton Weatherford etc…
  13. d23

    Sluggish workbook

    Pete, This is good info! Thanks D23
  14. d23

    PUMPDESIGNER

    Artisi, I believe PUMPDESIGNER was Richard Neff. He was killed in an automobile accident near Ft. Lauderdale Fla. A very nice and knowledgeable person. http://www.irrigationcraft.com/ D23
  15. d23

    Centrifugal Pump Impeller Failure

    JJPellin I assume the amine is used to scrub H2S. Any possibility H2S is attacking the 316 SS? D23
  16. d23

    What should be a minimum tank level to operate pump?

    Abhi1712, If you were told the minimum intake pressure required is 8 PSI then someone in your company knows the NPSHR. You should get that information from them. You need to ask if the 8 PSI is PSIA or PSIG. There is a difference between absolute and gauge. Not knowing the gravity of the...
  17. d23

    Viscosity

    aiwa7777, The original question could be a little misleading. I would be hesitant to answer unless I knew the head and flow required. Do you have a small pump that only requires 10 GPM with 10 feet of head or are you trying crude oil pipeline pumps? Knowing a little more about the...
  18. d23

    shooting fluid levels - obtaining down hole information esp wells

    rv13 I’m guessing this is a west Texas well. With 41 degree API and 30 Mcf/D the GVF is only about 51.6 scf per bbl of liquid. In 9 5/8 casing you should not have much gas interference in the pump. With 41 degree API you will likely have foam at the producing fluid level during operation...
  19. d23

    shooting fluid levels - obtaining down hole information esp wells

    Rv13 First I would suggest you discuss an appropriate test procedure for your well with your equipment supplier. Manufactures have been testing wells for the last 30 to 40 years, use their experience. Changing speeds on a VFD every 30 minutes will usually result in very bad information. I...
  20. d23

    multi page user form

    satchmo, Thnaks for the code. I have to add a few if's and I'm good to go! D23

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