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primary cementing

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All you need to know about Bentonite in Cement Slurries

Let’s just have a quick overview regarding the bentonite. It is easy to find references online regarding bentonite as a cement extender, the way it works or I should say reacts and why additional water is required when using it as an extender. Here I will try to be simply explain. First of all, Use […]

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Forward thinking reverse cementing

I recently participated in a discussion about opting for the best alternative between conventional and reverse primary cementing to deal with losses and frequent difficulties to reach the required TOC in an intermediate well section. The interesting thing in this discussion was that the majority of the participants had no experience in doing reverse cementing. […]

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Mud Displacement, the ‘mystery’ factor in gas and fluids migration

Very often I find myself helping people having issues with fluids migrating following primary cementing. In all these cases, it is always fascinating to see the frequency of this problem nowadays. Especially with the involvement of expert services companies and the availability of state-of-the-art engineering and products solutions. I have already written here about fluid […]

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Primary Cementing Checklist (Customer)

Now you are the person in charge of well construction operations. It is nighttime, and the company man is resting (contrary to ‘normal’ people, a co-man needs noise to properly rest, because noise means that ‘all is working’). As a junior or night well site leader you have done and seen this many times, but […]