Continuing with this series of posts covering some of the cementing techniques applicable in workover operations, I want to talk further about plug cementing. In previous posts, I have covered extensively plug cementing. This time I am providing information regarding laboratory testing and some considerations when cement plugs are intended for well abandonment. Cement Slurry […]
All you need to know about Bentonite in Cement Slurries
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 […]
Horizontal or highly deviated well section abandonment?
This is a guide for those who are facing plugging and abandonment challenges of a horizontal or deviated welI. To be honest, it is only recently that I had the opportunity to place frequent cement plugs in such conditions and for good purpose. Yes, I did those only occasionally before … However, “frequency” is important, […]
Drill deeper or just plug it off?
A quick reminisce… Before we drill deeper into the topic, first an introduction. Over the years, I have had the opportunity to work with many drilling teams. I have to say, some of them still occupy a very special place in my heart. Not only because of the quality of the people I had the […]
Balance to succeed: Cement Plugs in losses situation
Loss circulation challenges This is a short article focusing on one topic: the balanced plug. During my time in Mexico, one of the main challenges That we faced was severe loss circulation. In new wells, due to the presence of fractured carbonates and low formation pressure (LPHT), several actions were usually in place. Examples include […]
Some guidelines for Cement Plugs
Here are the primary considerations that need to be top of mind when dealing with cement plugs. We think that all the most relevant ones are here, and can serve as a revision checklist. We’d welcome any additional suggestions to add to the page. Use a cementing stinger and cover both the cement and spacer […]
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