Back in 2016, I posted an article on laboratory testing for cement slurries. In this article I briefly referred to the changes in the preparation of the slurry in the laboratory to account for the additional mixing energy typical in small slurry volume jobs using batch-mixer, like in CT operations. In fact, it is common […]
Drill deeper or just plug it off?
Over the years, I have had the opportunity to work with several drilling teams; and I have to say, some of them still occupying a very special place in my heart, not only for the quality of the people I had the pleasure to work with; but also for the amazing things we did together, […]
Balance to succeed, a case of Cement Plugs in losses situation
During my time in Mexico, one of the main challenges 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, like managed pressure cementing (cementing taking advantaged of MPD equipment/practices), use of foamed or nitrified fluids and high performance lightweight […]
Some guidelines for Cement Plugs
Use a cement stinger and cover cement and spacer lengths. This will minimize contamination and fluids intermixing. Always set base for off-bottom cement plugs, this can preferentially be a bridge plug (if cased hole) or alternatively a viscous pill. In case a viscous pill is used place a side jet diverter sub at the end […]
Suicide Squeeze, a risky but still valid choice
More technically, referred as an application of circulating squeeze. In a circulating squeeze, cement slurry is “forced” to flow through a lower open path and up behind the casing with returns being taken back into the wellbore or to the annulus. Normally, there is an isolation tool, a cement retainer or a packer placed above […]
Cementing Engineering Services
After all the time in this challenging industry, the last few years have been incredibly interesting; and I know most people consider these last couple of years probably the worse for the oil industry ever and if we go by numbers that is absolutely correct. However, despite this undeniable truth there is also an urgent […]
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