Multi-branched Polymer Fluid Loss Reducer for Drilling
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Solution Overview
Problem
Current synthetic polymer fluid loss reducers for drilling fluids have complex preparation processes and high costs, and are environmentally unfriendly due to the use of expensive and harmful monomers.
Innovation Solution
A temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer is developed, composed of a main chain with specific repeating units and prepared using a process involving acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, and acryl polybromide monomers, with a simple and environmentally friendly method that avoids aromatic and ionizable monomers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic resin type fluid loss reducer (sulfomethyl phenolic resin) is used to achieve good temperature resistance and salt resistance, then filtration loss reduction performance is improved, but environmental pollution is caused during preparation and use
Solution Approach 1:
The patent replaces expensive and environmentally harmful synthetic resin monomers with cheap, biodegradable natural polymer monomers (acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, and acryl polybromide). These natural polymer-based fluid loss reducers achieve comparable temperature and salt resistance without causing environmental pollution, effectively substituting harmful materials with eco-friendly alternatives
Solution Approach 2:
The patent modifies the chemical structure parameters by introducing multi-branched polymer architecture with specific repeating units containing amino groups. This structural parameter change enables the polymer to maintain excellent temperature resistance (stable performance up to 220°C) and salt resistance while being composed of environmentally benign monomers, thus resolving the contradiction between performance and environmental impact
2Reliability
If various structural fragments (silane, rigid ring, maleic acid, etc.) are introduced into synthetic polymer to achieve different properties, then fluid loss reduction performance is improved, but preparation process becomes cumbersome and cost increases
Solution Approach 1:
The patent combines multiple functional monomers (acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, and acryl polybromide) into a single multi-branched polymer system. This merging approach integrates the benefits of different structural fragments into one unified polymer architecture, achieving excellent fluid loss reduction performance while maintaining a simple and uniform preparation process without the need for separate introduction of multiple structural components
Solution Approach 2:
The multi-branched polymer structure with repeating unit (I) serves multiple functions simultaneously: the acrylamide groups provide fluid loss reduction capability, the amino groups enhance temperature and salt resistance, and the multi-branched architecture improves anti-collapse properties. This multi-functional design eliminates the need for separate structural modifications, simplifying the preparation process while achieving comprehensive performance improvement
3Reliability
If various structural fragments are introduced into synthetic polymer to achieve different properties, then fluid loss reduction performance is improved, but production cost increases due to expensive monomer raw materials
Solution Approach 1:
The patent replaces expensive synthetic resin monomers with inexpensive natural polymer-based monomers. The three selected monomers (acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, and acryl polybromide) are all cost-effective and readily available, significantly reducing production costs while maintaining excellent fluid loss reduction performance through their multi-branched polymer structure
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 new polymer system significantly reduces production costs, maintains excellent temperature and salt resistance, and effectively reduces filtration loss in drilling fluids, with improved anti-collapse properties and environmental sustainability.
Implementation Method 1
Adding an initiator to the raw material mixture, and initiating the polymerization reaction after heating up to obtain a viscous mixture
Data Source
AI summary
A main chain of a temperature-resistant and anti-collapse multi-branched polymer fluid loss reducer is composed of the following repeating unit (I):In the repeating unit (I): x:y:z=(20˜80):(20˜80):(2˜30); the R1 and R2 groups are alkylamines having a multi-branched structure. The beneficial effect of the multi-branched polymer fluid loss reducer is: introducing cheap acrylamide branch monomer into the polymer monomer system of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid, the preparation process is simple, the reaction conditions are mild, and the production cost is significantly reduced.