Aryl-Substituted Saccharides for Drilling Fluid Filtration Loss Control
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Solution Overview
Problem
Current drilling fluids face challenges in high temperature resistance, salt resistance, and filtration loss reduction, particularly in deep and complex well drilling operations, leading to potential stratum stress collapse and instability.
Innovation Solution
The development of aryl-substituted saccharides or glycosides, which are incorporated into drilling fluids to enhance their high-temperature resistance, salt resistance, and filtration loss reduction properties, achieved through a process involving etherification and radical polymerization with specific monomers and catalysts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drilling fluids are used in deep well drilling, then the drilling operations can be conducted, but the filtration loss control deteriorates and high temperature resistance is insufficient
Solution Approach 1:
The patent uses composite materials by combining aryl-substituted saccharide structures with polyether chains and aromatic rings to create a multifunctional additive that simultaneously provides filtration loss control and high temperature resistance. The composite structure integrates multiple functional groups (ether linkages, aromatic rings, hydroxyl groups) that work synergistically to address both contradictory requirements.
Solution Approach 2:
The patent changes the chemical parameters of the drilling fluid by introducing aryl-substituted saccharides with specific molecular structures (containing ether linkages, aromatic rings, and hydroxyl groups). These parameter changes in molecular composition enable the fluid to maintain stability and effectiveness at high temperatures while controlling filtration loss.
2Reliability
If conventional drilling fluids are used, then drilling operations can proceed, but salt resistance is insufficient leading to stratum instability
Solution Approach 1:
The aryl-substituted saccharide composite structure provides salt resistance through its unique molecular architecture combining hydrophilic hydroxyl groups with hydrophobic aromatic rings and polyether chains. This composite structure enables the additive to maintain effectiveness in high-salinity environments, protecting stratum stability.
3Loss of substance
If filtration loss reduction is prioritized, then drilling fluid performance improves, but high temperature resistance and salt resistance are compromised
Solution Approach 1:
The aryl-substituted saccharide additive achieves multi-functionality by simultaneously providing filtration loss reduction, high temperature resistance, and salt resistance. The molecular structure contains multiple functional groups (ether linkages for flexibility, aromatic rings for thermal stability, hydroxyl groups for polarity and interaction) that enable a single additive to perform multiple functions that were previously required from separate additives.
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 aryl-substituted saccharides or glycosides improve the drilling fluid's performance by allowing it to be compounded with water-based fluids without toxicity, providing excellent high-temperature resistance, salt resistance, and reduced filtration loss, thereby ensuring safe and efficient drilling operations.
Implementation Method 1
reacting a saccharide or glycoside... with an etherifying agent... to obtain an etherified saccharide or glycoside
Implementation Method 2
reacting the etherified saccharide or glycoside with an arylethylene monomer... for the reaction... to obtain the aryl-substituted saccharide or glycoside
Data Source
AI summary
An aryl-substituted saccharide or glycoside or a mixture of a plurality of aryl-substituted saccharides or glycosides have at least good resistance to high temperatures and salt, and lower filtration loss. These aryl-substituted saccharide or glycoside are used in making a drilling fluid composition. The aryl-substituted saccharide or glycoside or the mixture of a plurality of aryl-substituted saccharides or glycosides each or in combination bears a substituent A and a substituent B, wherein the substituent A contains a unit —O—R6— in its structure and the substituent B contains a unitin its structure, and the substituents and the numbers are defined in the description.