Liquid Salt Composition for Cement Slurry Early Strength
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Solution Overview
Problem
Existing cement slurries face challenges in developing satisfactory mechanical properties within a desired time frame during subterranean cementing operations, necessitating the need for an additive that can control the setting time and properties of the hardened cement.
Innovation Solution
A liquid salt composition comprising one or more salts, a suspending aid, glycol, and water is used as an accelerator to increase early strength development of cement slurries without significantly altering the thickening time or setting time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cement slurry is used in subterranean cementing operations, then the wellbore can be sealed and structured, but the mechanical properties do not develop satisfactorily within the desired time period
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition of the cement slurry through the addition of specific accelerators (calcium chloride, calcium sulfate, or a combination thereof) and retarders (potassium chloride, sodium chloride, or ammonium chloride). These chemical additives change the setting kinetics parameters, enabling the cement slurry to achieve satisfactory mechanical properties within the desired time period by controlling the rate of hydration and strength development.
2Strength
If additives are added to cement slurries to control setting time, then the mechanical properties can be optimized, but the complexity of the cement slurry composition increases
Solution Approach 1:
The patent applies segmentation by dividing the additive system into distinct functional components: accelerators (calcium chloride, calcium sulfate) that promote early strength development, and retarders (potassium chloride, sodium chloride, ammonium chloride) that control setting time. This segmented approach allows independent optimization of different cement slurry properties without requiring complex interaction between multiple additive types, thereby managing composition complexity while achieving desired mechanical properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The liquid salt composition effectively enhances the early compressive strength of cement slurries, improving the mechanical properties and operational flexibility, especially in high-temperature applications.
Implementation Method 1
The liquid salt composition can be used in wellbore servicing fluids, and more specifically the liquid salt composition can be used in a cementitious composition. The liquid salt composition effectively enhances the early compressive strength of cement slurries
Data Source
AI summary
A liquid salt composition for a cementitious slurry, the liquid salt composition comprising one or more salts, one or more suspending aids, glycol, and water. The one or more salts are present in the liquid salt composition in an amount of from about 5 wt % to about 95 wt %, based on the total weight of the liquid salt composition. A method of utilizing the cementitious slurry comprising the liquid salt composition for servicing a wellbore penetrating a subterranean formation is also provided.