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  1. amarks

    Sizing Shaft Diameter

    dvd - I noticed in that previous document you sent, that could be an issue and they actually machine a raised journal on the shaft where the locking device sits to reduce these stress concentrations. Thank you for that information.
  2. amarks

    Sizing Shaft Diameter

    BEMPE16524 - Yes, there will be drum bearings attached to the end plates on the drum and pillow block bearings attached to the frame for the drum shaft to spin on. The drum is going to be chain driven by chain and sprockets connected to a planetary gearbox. Purpose of the winch is to pull...
  3. amarks

    Sizing Shaft Diameter

    desertfox - sorry about that. Attached is a picture of the excel spreadsheet I put together to calculate this. Let me know your thougths.https://files.engineering.com/getfile.aspx?folder=9fb43324-8e6e-48a6-9ba8-ab70ae8bca3e&file=shaft_design.png
  4. amarks

    Sizing Shaft Diameter

    Looking for some help on sizing the shaft diameter for a winch drum. I've worked the equation attached from Shigley and Mischke Mech Eng Design, but the shaft size seems pretty large for the application. Anybody have any experience designing drive shafts for winches and/or know other...
  5. amarks

    Calculating Gas Velocity

    Snickster - Thank you for working this out for me and excuse my sluggish mathematic skills. This has been super helpful. Also thank you for the online calculator link. Pierreick - Thank you for the document giving examples and solutions, this too is very helpful.
  6. amarks

    Calculating Gas Velocity

    1503-44 - Fair point, appreciate your input.
  7. amarks

    Calculating Gas Velocity

    LittleInch - Interesting, so the length of the pipe doesn't change the velocity whether its 1m or 20m? Here is what I came up with on various pressures and flowrates for velocities. Does this look correct to you? Seems a little high to me...
  8. amarks

    Calculating Gas Velocity

    Latexman - that would leave me with too many unknowns, wouldn't it? LittleInch - That is so helpful, thank you so much for this. One question, if when finding the volume of length of pipe, instead of using 1m length I used 24.384 m (80ft) would that give me the velocity in the full length of...
  9. amarks

    Calculating Gas Velocity

    Latex - how do you get mass flow rate?
  10. amarks

    Calculating Gas Velocity

    Snickster - how do you get the variable m/sec. Also what is the difference between "m" and "MW"? Is it safe to just use Z=1 for NG?
  11. amarks

    Calculating Gas Velocity

    All - Great replies, thank you kindly for all of the input, helps greatly. pierreick - I like the online calculator, although I'm not sure how its getting velocity without a flowrate? Snickster - great information, thank you. I'll rearrange this equation to solve for Vel. LittleInch - Are...
  12. amarks

    Calculating Gas Velocity

    Hello, Is there a quick version or rule of thumb version of calculating gas velocities in a gas well flow back line? There are so many variable, that if changed slightly can really change all of the calculations. Just curious if someone has a quick and dirty calculation to get approximate...
  13. amarks

    Sand Separator Calculations

    1503-44 - Fantastic paper, thank you for sharing. Was working down through the equations and was curious when finding Vgmax is it safe to say the gas and liquid densities are their Specific Gravities? Also when solving for Dmin what units are qa - gas flow in? Thanks again for the...
  14. amarks

    Sand Separator Calculations

    Hello, Does anybody have any experience with sizing sand separators (a.k.a. Sand Knockouts or desanders) and what calculations are needed? Assuming a well flowing back at 10,000 psi, 100 deg F, 75 MMSCFD, 7 lbs/hr sand. These are arbitrary numbers, just trying to get an idea of what we need.
  15. amarks

    Double Bullwheel Roller Capstan Calculations

    DVD - thank you. No sir unfortunately it’s myself and one other engineer that is on a project for another industry. I’ve worked in companies with many engineers on a team and am fortunate to still have a lot of them for reference. Unfortunately that was in a totally different industry from what...
  16. amarks

    Double Bullwheel Roller Capstan Calculations

    Compositepro - I keep telling myself it shouldn't be this complicated but I keep coming back to calculus equations and their derivatives. I do think it is the way to go and I still want to dig deeper into the capstan route, however the customer is requesting that we not use the capstan, so we...
  17. amarks

    Compressive Strength of Steel Pipe

    LittleInch - That makes sense, appreciate your example.
  18. amarks

    Double Bullwheel Roller Capstan Calculations

    mfgenggear - Do you know of any manufacturers that design and manufacture these, that I can discuss specifics with? Looking at pulling 22,000 feet of 3/4" diameter wire rope at 30,000 lbs max line line tension.
  19. amarks

    Double Bullwheel Roller Capstan Calculations

    I'm looking at designing a utility transmission line pulling unit and am curious if anybody knows calculations used to determine the capstan sizing (number of wraps, bullwheel sizing, hydraulic gearmotor sizing, etc.) for a certain amount of pulling force? See picture attached of a common...
  20. amarks

    Compressive Strength of Steel Pipe

    1503-44 - the allowable stress is 85% of the material yield. I was wondering if anybody in the "Pipelines, Piping, and Fluid Mechanics Forum" might know something about piping material properties. The end goal was to try and figure out the compressive strength of a piece of pipe that I am...

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