Squeeze cementing is basically a filtration process that occurs during the placement of the cement slurry into a wellbore entry point (casing leak, existing perforations, etc.) under sufficient differential pressure. The cement slurry is held in place until it cures and establishes a hydraulic seal. Look at this picture in Squeeze Cementing Principles explaining the […]
As a cementer, you are required to isolate a possible influx zone at 1600m, What can you do?
Influx zone characteristics These wells may show high dogleg severity in the intermediate section. Depending on the type of formation drilled across, there could be a tendency to form sort of keyseats, not only low side but also high side. They tend to get worse with additional drill string work, such as trips, reaming or circulation. […]
Good or bad cement job? 7 Criteria
Well, this is the question: Was it a good or bad cement job? The final answer will depend on the objectives of the job. We ask ourselves, were they met? In most cases, additional information is required, like a cement evaluation log, a pressure test or even further data during the well’s completion. However, some immediate […]
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 […]
Why wiper plugs don’t always bump?
Everybody knows why bumping the top plug at the end of the displacement is an essential element of each successful primary cement job. It ensures only the shoe track is left with cement, and; It allows the pressure testing of the casing. First of all, a couple of questions for you: What is the reason […]
Importance of a Pre Job Cementing Check
Introduction This page contains a pre-job cementing check that you’re welcome to copy and implement into your own process. During my first years in the industry, I quickly realized the importance of proper planning and preparation before a cementing operation. For such an important, short and intense task, being ready and organized is the most […]
Recent Comments