Gelation in Oil well cement

Hi everyone   Please help

 I need to know the causes for gelation in oil well cement and how we can avoid it.

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Re: Gelation in Oil well cement

You need to define what you mean by gelation. If you mean thickening or setting then it is the high pressures and temperatures at certain depths in the oilwell. Avoiding it is acheived by the use of retarders.

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Re: Gelation in Oil well cement

Thanks in advance Mr. Clarke

Initial Bc is high but after some time say 10 -15 minutes it gets reduced, mill outlet temperature is 95-100 C only.

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Re: Gelation in Oil well cement

Hello Sundararaju,

I am a new member to this group. Regarding the query that about gelation in Oilwell cement its mainly because of the following reasons

a) Free lime content more than 0.5- 0.7 % in the clinker.

b) High Milling temperature

c) High Specific surface area

d) Impurity in gypsum used. the gypsum used should be free of contamination

You can make a labscale trial and find out the optimum tempr,blaine for OWC class G grinding.

If you have any specific queries ps revert back

bye 

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