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 doing reverse cementing. There […]
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 the frequency of this problematic in our days, 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 […]
Primary Cementing Check List (Customer)
Now your are the person in charge of well construction operations. It is night 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 Wellsite leader you have done and seen this many times, but still […]
Why wiper plugs don’t bump?
Everybody knows why bumping the top plug at the end of the displacement is an important element of each successful primary cement job. It ensures only the shoe track is left with cement; and allows pressure testing the casing First of all, a couple of questions for you: What is the reason for a shoe […]
Cement Calculations (TEST)
Cheers L. Diaz DOWNLOAD Primary Cementing Calculation TEST
Liner Cementing
1. Considerations for Pre-flush / Spacer In liner cementing operations, the bottom wiper plug, responsible to mechanically separate the cement slurry from the spacer ahead, is sometimes not available due to the characteristics of common liner tool system in use. This is a limitation which results in increased front-end contamination of the cement slurry with […]
Recent Comments