Let’s have a quick overview regarding 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 explain as simply as possible, for readers of all […]
New CemPRO+ Review
Following my CemPRO+ review post a little more than two years ago, I have broadened my knowledge of this cementing application, not only providing engineering and post-job analysis to my customers but also and during some time, actively designing cement jobs in an ongoing busy operation. Furthermore, I even found myself in the middle of […]
Cement gelation: Come on! move it! push it! … Too late, it’s gelled up! …
Now, please let me tell you more about Cement gelation Why this post? Over a month ago, someone requested some insights about gelation during primary and secondary cementing. Two or three answers were provided, which I think were enough to have a good idea of the topic. However, to be honest, I could not stop […]
Successful Well Cementing
The case of unawareness Vs. understanding What are the consequences of knowing the outcome of your cement job? Most people would say that knowing the outcome allows the connection of execution and design with job models and assumptions — the path of perfection. To clarify, knowing the cement bond is just part of the “outcome” […]
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. […]
Gas migration and surface casing vent flow (SCVF) issues and prevention
Please read and comment on the following fascinating article about SCVF problems written by my invited expert: Djilali Sahnoun – Technical & Engineering Manager. Many wells experience surface casing vent flow (SCVF) and subsequent gas migration to the surface through one of the following issues: a cemented casing string(s) with either a micro-annulus between casing and cement, a […]
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