Stabilising formation with silicate mud

02 August 2017 Hello Spreaders.  I have an interesting stuck pipe issue which has defied full identification of the root causes.  One of the possible causes is a weakly cemented sandstone with hard, possibly naturally fractured, siltstone streaks.  Weak formation gets washed out (past full scale on caliper), chunks of siltstone fall in and get us mechanically stuck.

I thought a viable approach would be to run a silicate mud system to consolidate the sandstone (so it doesn't wash out and siltstone doesn't fall in) and possibly also fill fractures in the siltstone with precipitates.

Does anyone have any relevant experience or ideas?

Thanks Steve.

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