×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

effect of solution gas oil ratio on Screw Pump efficiency

effect of solution gas oil ratio on Screw Pump efficiency

effect of solution gas oil ratio on Screw Pump efficiency

(OP)
i want to ask about the effect of increase solution gas oil ratio (amount of gas dissolved in the oil) on Screw Pump efficiency used to transfer crude oil , and if this can increase clearances between the rotor and pump housing
and what the other bad effect of increased gas dissolved in the oil on the Screw Pump

RE: effect of solution gas oil ratio on Screw Pump efficiency

I'm not sure what your point or issue is here.

If there is more gas dissolved, but you are operating at the inlet side above the partial pressure of said gas ( i.e. above bubble point) then the only big issue would be that the density should decrease and possibly viscosity as well, but otherwise you're still pumping a liquid so there should not be any significant change.

If you're below bubble point a the inlet then you're looking at a two phase pump and all hell will break loose.

So which is it?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: effect of solution gas oil ratio on Screw Pump efficiency

(OP)
we are working below bubble point a the inlet of the screw pump , and i ask what pad effect of this separated gas on screw pump

RE: effect of solution gas oil ratio on Screw Pump efficiency

Well that will depend on how far below the bubble point you are.

As the pressure increases along the screw the amount of gas will reduce, but the overall liquid flow of your pump will decrease and possibly the pressure able to be output. How much is dependent on the amount of gas actually present in the fluid at the inlet.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: effect of solution gas oil ratio on Screw Pump efficiency

Vague recollection of 2phase screw pumps in crude gas transfer is that gas void fraction (GVF) on a volumetric basis should be less than 95%. I may be wide off the mark here, but there is a limit prescribed by the 2phase pump vendor. Petronas / Shell tried out these pumps on a facility in the South China Sea many years ago ( 1990's), but abandoned this after a few years of troublesome operation - high power consumption was also one OPEX disadvantage.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources