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I urgently need the thermal conductivity of typical CaCO3 scales in sea water, preferably with a decent reference? Any help would be appreciated! Read the Eng-Tips Site Policies at FAQ731-376

Hi all, I am trying to calculate the overall heat transfer coefficient for a PARTIALLY buried pipe ... say 1/3rd buried by sand / soil and the remainder open to the air or water. I can find a few resources for calculating this for fully buried pipes at various depths, but what about PARTIALLY...

Hi All, Not quite sure whether this is the right place to pose this question ... but here goes anyway. I'm looking for a fairly comprehensive list of large projects which have used (or intend to use) continuous MEG injection as the primary hydrate prevention strategy. So far I have come up...

Hi All, Not quite sure whether this is the right place to pose this question ... but here goes anyway. I'm looking for a fairly comprehensive list of large projects which have used (or intend to use) continuous MEG injection as the primary hydrate prevention strategy. So far I have come up...

Ok so I have a bunch of numbers in cells A1, B2 C1 and D1. In cell E1 I have a formula which sums cells A1, B1 and C1. I fill that formula down a pile of rows, and look at cell (for example) E7 and sure enough the formula still says =sum(A7:C7) But, for some odd reason, when I enter the...

Choke CVs are normally quoted in units of gal/min/psi ... what type of gallons? Imperial or US? Yet another reason to switch to metric ... Read the Eng-Tips Site Policies at FAQ731-376

Ok, this could be really straight forward, but I cant figure it! I have a set of x-y data points (superficial gas and liquid velocities if you must know). Now I want to plot these on an x-y scatter graph, but I also want to label each point with a different label (the oil flowrate ... if you...

Hi all, am developing a fairly complicated well clean up model and am trying to figure out how long it will take for the BS&W at topsides to be acceptable. Now no one I have spoken to has been able to give me a direct answer of exactly how BS&W is calculated ... they generally say "Oh we...

Hi all, Need to do some calculations on minimum flowrates in a multiphase subsea flowline during normal production and after well cleanup. I am looking for flowrates that will be sufficient to effectively "sweep" the flowline of particles. The reason I mention the two scenarios (well cleanup...

I'm doing some downsampling of a flowline, and the geometry editor in Olga is telling me my angle groups are not good (lots of red bars). Now I could be here all night trying to see what groups will best match my pipeline manually ... does anyone have any tips? Read the Eng-Tips Site Policies...

How do I do this? I want something like =FIND(""",A2,3) which of course does not work ... any ideas? Read the Eng-Tips Site Policies at FAQ731-376

Hi all, I'm after typical Specific heats, thermal conductivites and expansion coefficients for typical North Sea drilling muds in the range 1300(10.8lb/gal)-1800kg/m3(15.0lb/gal) ... I have no idea where to start with this, so any help would be appreciated. Read the Eng-Tips Site Policies at...

Just wondering if anyone has had experience in model validation between using OLGA and Prosper. I am currently developing a well model in OLGA and would appreciate any tips! Read the Eng-Tips Site Policies at FAQ731-376

Hello all, I've been away for a while! This is probably a simple question, but I don't know much about Bingham fluids. I want to pump an oil which has a tendency to gel. I know the yeild stress of it, so can calcuate the minimum restart pressure, but what I want to know is if that minimum...

Hi all, in this (now closed) thread thread124-21178 , TD2k mentions "Note, one other thing you may want to look at is if you flow hot gas down through the flare system. Once that flow stops, the hot gas in the system cools and shrinks which can pull air back in through the tip if the shrinkage...

Just wondering what the most appropriate fluid package for a MEG / water system. We are using HYSYS to model the system, and are not particullarly confident that the PR package we are using for the rest of the gas plant is applicable to the rich MEG streams. Does anyone have any experience with...

I have a system where there is a near 100Barg pressure drop in a liquid stream over a valve. According to HYSYS this pressure drop results in an almost 1% increase in the absolute temperature of the liquid. Is this correct? If so, what is the fundamental reason why this happens? Read the...

In most firewater systems I've seen, the jockey pump only kicks in when required to re-pressurise the firewater mains. However, I've just been presented with a set of P&IDs for a very large fire system, for a very large plant, in which it is implied that the jockey pump operates continuously...

Hi all, I was hoping someone could explain a little more clearly what the use of a "Cold Seal Trap" is in then following paracgraph (from Therminol's manual): Figure A: Figure B: From Therminol "Liquid phase systems design guide" Any other hints or tips in this area would be appreciated...

Can't seem to find any other posts about this (amazingly enough) ... MASSIVE blast at Buncefield fuel depot near Hemel Hempstead North of London in England. "The man in charge of investigating the massive fires at a Hertfordshire oil depot on Sunday says the flames may have destroyed all clues...