Interground Perlite Hydraulic Cement Strength
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Solution Overview
Problem
Cementing operations in well treatments face challenges in achieving sufficient compressive strength in a reasonable time, particularly at elevated temperatures, and there is a need for cost-effective and environmentally friendly solutions to reduce the carbon footprint.
Innovation Solution
The use of interground perlite and hydraulic cement compositions, which include unexpanded perlite, CKD, or pumicite, to enhance compressive strength and reduce the amount of higher cost components like Portland cement, thereby improving the economic and environmental sustainability of cementing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional cement slurries are used to achieve sufficient compressive strength, then the cementing operation can proceed, but the process requires longer waiting time and higher costs
Solution Approach 1:
The patent changes the particle size parameter of perlite by intergrinding it with hydraulic cement to produce a fine powder with increased surface area. This parameter change enhances the reactivity and efficiency of the cementing composition, allowing sufficient compressive strength to be achieved in a shorter waiting time compared to conventional cement slurries.
Solution Approach 2:
The patent creates a composite material by intergrinding perlite with hydraulic cement to form an integrated powder mixture. This composite composition synergistically combines the properties of both materials, where the fine perlite particles enhance the cement's performance, resulting in faster strength development and reduced wait-on-cement time.
2Strength
If more Portland cement is used to increase compressive strength, then the strength requirement is met, but the cost and carbon footprint increase
Solution Approach 1:
The patent replaces expensive and high-carbon-footprint Portland cement with a more economical alternative composition based on hydraulic cement interground with perlite. This substitution maintains sufficient compressive strength for cementing operations while reducing both cost and environmental impact, effectively using a cheaper material to achieve the same functional outcome.
Solution Approach 2:
The patent modifies the chemical composition parameters of the cementing material by substituting Portland cement with hydraulic cement enhanced with interground perlite. This parameter change in material composition achieves comparable or superior strength performance while significantly reducing the carbon footprint associated with cement production.
3Reliability
If higher quality cement components are used to ensure sufficient strength, then the cementing reliability improves, but the cost increases
Solution Approach 1:
The patent substitutes expensive high-quality cement components with a cost-effective composition of hydraulic cement interground with perlite. This alternative material achieves reliable cementing performance without the high cost of premium cement products, making the manufacturing process more economically viable while maintaining operational reliability.
Solution Approach 2:
The patent develops a composite material system combining hydraulic cement and perlite that delivers reliable cementing performance at lower cost. The interground composite leverages the beneficial properties of both materials to ensure adequate strength and reliability while reducing dependency on expensive cement components.
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 interground perlite and hydraulic cement compositions demonstrate increased compressive strength at elevated temperatures and reduce the carbon footprint by minimizing the use of high-cost cement components, leading to more efficient and sustainable cementing operations.
Implementation Method 1
The hydration of the cement in these cementing methods is a complex process because several phases may take part in the reaction simultaneously
Data Source
AI summary
Methods and compositions are disclosed that comprise interground perlite and hydraulic cement. An embodiment provides a method of cementing comprising: providing a settable composition comprising perlite, hydraulic cement, and water, wherein the perlite and hydraulic cement are interground prior to combination with the water to form the settable composition; and allowing the settable composition to set.