Primary cementing objective recap Trapped pressure is always something to be aware of in cementing. A common objective of the primary cementing operation of intermediate casings is to have the top of the cement at the surface. In some cases, due to the presence of losses during or after the cement placement, this objective is […]
Recommendations to avoid Annular Pack Off while cementing
Introduction: Before we cover the ways that we can mitigate the risk of an annular pack off while cementing, first we can cover the actions that lead to this outcome. Insufficient hole cleaning before cementing means that cuttings and solids remain in the hole by the time we execute the cementing operation. This situation is […]
Liner Cementing Challenges and Solutions
1. Considerations for Pre-flush/Spacer In liner cementing operations, the bottom wiper plug, which is responsible for mechanically separating the cement slurry from the spacer ahead, is sometimes not available. This availability issue is due to the characteristics of many common liner tool systems in use. This limitation results in increased front-end contamination of the cement slurry […]
Geothermal Well Cementing
A recent request about the topic of geothermal well cementing brought me memories of a project I led back in 2008. It was my first time in a geothermal well construction project. Yes, there was a rig, there was drilling, drilling fluids and cementing but, it was entirely different from the oil and gas business. The […]
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