Portland Cement
Latex additives for gas migration control
Latex additives for gas migration control, with a list of suppliers. Read more
Portland cement chemistry and hydration reactions
The first in a series of articles covers cement chemical notation, Portland cement components and their hydration reactions. Read more
Chemical shrinkage of hydraulic binders
The second in a series of articles gives an explanation of chemical shrinkage, with two examples, and a method of measuring chemical shrinkage of hydraulic binders. Read more
Bulk volume changes of Portland cement systems
The third article in the series discusses how the effect of chemical shrinkage on the bulk volume changes will depend significantly on the conditions during setting, and considerations for oil well cementing. Read more
Expanding agents for improved zonal isolation
The final article in the series explains how expanding agents can be used to reduce the risk of loss of zonal isolation in both annular and plug configurations. Read more
Thermoset Resins
Volume changes during setting of thermoset resins
An article explaining the chemical shrinkage that occurs during the curing or crosslinking of thermoset resins, and the implications for zonal isolation. Read more
Thermoset resins: the importance of thermal properties for zonal isolation
When resin systems cure significant heat is liberated in a relatively short time which can led to a significant increase in temperature of the resin and surrounding material (casing, cement, rock).
This increase in temperature combined with the fact that the thermal expansion coefficient of thermoset resins is much higher (>4x) than that of steel or rock may lead to loss of zonal isolation. Read more
Drilling fluids
Derivation of cuttings density calculation
Derivation of the formula to determine cuttings density from mud balance measurements. Read more
Innovation
Geopolymer patent publications
Patent activity statistics from 1989 to 2019 related to geopolymers. There is a significant increase in activity from the mid 2000's corresponding to the search for construction materials with a lower CO2 footprint. Read more
French patent filings 2017
A summary, in English of the chemistry section, of a report from INPI (The French National Industrial Property Institute) highlighting the 50 companies/institutions that filed the most patent applications in France in 2017. Read more
Standardisation
IOGP Standards Solutions Work Group
A summary of the activity of the cementing workgroup at the IOGP Standards Solutions meeting March 30th and 31st 2020. Read more