Hydrolysable Drilling Resin Composite for Fracturing Efficiency
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Solution Overview
Problem
Current drilling methods for extracting underground resources face challenges with the hydrolysis rate of biodegradable resins like polylactic acid at low temperatures, leading to poor extraction efficiency, and the high cost and incomplete decomposition of polyglycolic acid, which limits its practicality for hydraulic fracturing.
Innovation Solution
A dispersion solution is developed by combining a sparingly hydrolysable resin like polylactic acid with a resin that accelerates ester decomposition, such as polyoxalate, and incorporating enzymes like protease, lipase, or cutinase, to enhance hydrolysis rates and reduce costs, while avoiding the need for acid treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polylactic acid is used as the hydrolysable resin material, then the cost is reduced and environmental compatibility is improved, but the hydrolysis rate becomes insufficient at low temperatures
Solution Approach 1:
The patent combines polylactic acid (sparingly hydrolysable resin) with polyoxalate (hydrolysable resin that accelerates ester decomposition) to create a composite hydrolysable resin material. This composite leverages the cost advantage and environmental compatibility of polylactic acid while incorporating polyoxalate to accelerate hydrolysis at low temperatures, thereby resolving the contradiction between cost and extraction efficiency.
2Productivity
If polyglycolic acid is used to increase hydrolysis rate, then the hydrolysis capability is improved, but the cost increases significantly and decomposition is incomplete under specific temperature conditions
Solution Approach 1:
The patent creates a composite hydrolysable resin material combining polylactic acid with polyoxalate. This composite achieves enhanced hydrolysis capability through polyoxalate's ester decomposition acceleration without incurring the high costs associated with polyglycolic acid, while also ensuring complete decomposition under specific temperature conditions.
3Object-affected harmful factors
If polylactic acid is used as water loss-preventing agent, then environmental impact is minimized and acid treatment is eliminated, but the water loss prevention effectiveness may be insufficient compared to traditional agents
Solution Approach 1:
The patent combines polylactic acid with polyoxalate in a composite hydrolysable resin material. The polylactic acid component provides environmental compatibility and eliminates acid treatment requirements, while the polyoxalate component enhances the overall performance including water loss prevention effectiveness through its ester decomposition acceleration capability.
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 solution significantly improves the hydrolysis rate of the resin at temperatures up to 80°C, enhances drilling efficiency, and allows for the self-decomposition of filter cakes, reducing environmental impact and operational costs, while maintaining effective water retention and fracture formation.
Implementation Method 1
the hydrolysable resin material undergoes the hydrolysis and loses the form of the resin. Therefore, spaces (or cracks) form in the portions where the polylactic acid had been permeated
Implementation Method 2
a hydrolysable resin that accelerates the decomposition of esters
Data Source
AI summary
A dispersion solution for drilling obtained by dispersing, in an aqueous medium, a hydrolysable resin material that contains a resin that is hydrolysable but sparingly and a hydrolysable resin that accelerates the decomposition of esters. The dispersion solution for drilling exhibits a highly hydrolysable capability despite of using an inexpensive hydrolysable resin material, and can be favorably used for extracting resources relying on a well drilling method such as hydraulic fracturing method, rotary drilling method or riserless drilling method.