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Thanks for this suggestion to look from this angle into my problem.

Yes, I have read this paper as well. Though would like to mention that similar conclusions were drawn in this paper, which dates back to 1994. https://doi.org/10.2118/28815-MS I'm not sure how you suggest I should use these guidelines to the selection of pump types. For me it seems like these...

I am mainly looking at offshore applications. I agree that most of processing facilities are utilizing the reservoir pressure to avoid additional pumping. However, there are still some stream that need pumping, such as recycling streams. There is a good overview of treatment schematics for...

Standard is NORSOK P-002, section 22 - Oily Water treatment. Standard instructs to use low shear pumps and valves upstream the treatment system to avoid shearing and break-up of oil droplets. Regarding water treatment, you correct in some way about handling it. There are three ways to go: -...

Thanks for the answers. We deviated here slightly from the topic, though. I was wondering if there is a place I could look up some statistcs of pump types used in specific branches/applications.

As I understand there is usually a rag layer of oil that need to be separated. A high shear pump would shatter droplets into the smaller ones, which would be harder to separate in slop tanks or hydrocyclones.

isn't a low RPM and low differential head kind of opposite operating conditions for high hydraulic efficiency? And could you elaborate a bit more why Moyno pumps (and other PD pumps) is "a very bad idea in practice"?

Thank you for the answers. Sorry, if I didnt specify, but I'm looking at produced water treatment in the oilfields. I'm consulting NORSOK standard, and there are couple of places where it instructs to use low shear type pump. But this definition is rather wage, in terms what are the criteria to...

I'm looking for the information about what types of pumps are commonly associated with produced water treatment systems/facilities. I was looking for the information elsewhere, but could not find much. I'm interested to know approximate % of each pump type used for these applications. Thanks...

I can't also speak for downstream. But in upstream, methanol has some negative effect on produced water. - Methanol tends to increase solubility of hydrocarbons in water. Therefore, excessive amount of methanol may increase amount of hydrocarbons that are dissolved in water and are not removed...

It is exactly the current area of Application of our low shear Equipment. The efficiency of the separators depends upon the average droplet size of dispersed phase and the level of emulsification. On offshore platforms produced water is usually processed by hydrocyclones or flotation units. If...

Hi moltenmetal, Yes, I understand now the process of desalting. Nevertheless, effluent water shall carry over some of the oil with it, possibly in form of emulsion. This effluent water requires treatment. As I understood the waste water treatment facilities utilize pumps and valves in order to...

Hi, shvet2008, Thank you for the response. As you mentioned high pressure drop across the valve is a common source for emulsification. Our original application of low shear valves are choke valves and control valve upstream gravity separators in the oil industry. When strong emulsification...

Hi all, I am on the look after the indutries and processes where undesired emulsification can take place. Our Company is developing low shear Equipment, primarly for the oil indsutry, where water and oil form emulsions which require later separation. We want to hear where else Our equipment can...

Thanks for tips. This technology looks interesting. Will try to find out if it is applicable for polymer transfer as well.

Is there any control valve that is designed to transfer polymer without or at least with minimal degradation of polymer mixture? I am thinking mostly for the polymer flooding application in oil industry. Standard control valve would have too high shear forces acting on the fluid mixture which...

As LittleInch says its no problem for pump at all, 0.5% or 5%, or whatever WC you have. My point was to mention that in presence of both oil and water, centrifugal pumps in general tend to emulsify the flow. Emulsions would have slight increase in viscosity, which would increase the pressure...

Meshry, 2% water content is not high water cut. For transfer of crude oil to processing facilities, it is usulal to specifiy max 0.5% of basic sediments and water (BS&W). In case of higher water content centrifugal pumps tends to emulsifiy the fluids, which would affect downstream separation...

No, I didnt look at this type of pump. My general input data is flow: 60 m3/h with differential pressure of 15 bar.

My bad that I didnt provide enough input data. I understand your arguments completely API requirement is the industry standard here, thats why I follow it. I see that general consensus is that centrifugal pumps will do the work if RPM is limited to under the 800-1000. I found interesting...