Poly Fatty Amide Thinner for Oil-Based Drilling Fluid Viscosity
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Solution Overview
Problem
Oil-based drilling fluids become excessively viscous upon returning to the surface due to high solid content, making them difficult to pump and reuse.
Innovation Solution
A thinner is added to the oil-based drilling fluid, produced by reacting poly fatty amides with maleic acid and diluted with oleyl alcohol, fatty acid, or poly condensed fatty acid, to reduce viscosity, allowing the fluid to be reused.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drilling fluid circulates to transport cuttings to the surface, then drilling operations continue, but viscosity increases making the fluid difficult to pump
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition of the drilling fluid through the addition of a thinner agent. This thinner reduces the viscosity and yield point of the fluid by disrupting the gel structure formed by solid particles, thereby improving pumpability while maintaining the fluid's ability to transport cuttings
Solution Approach 2:
The thinner acts as an intermediary substance that mediates between the solid cuttings and the base fluid. It interferes with the interaction between solid particles and fluid, preventing excessive gel strength development and maintaining fluid流动性 (flowability) during circulation
2Reliability
If solid particles remain in suspension to transport cuttings, then drilling fluid performs its function, but viscosity and gel strength increase
Solution Approach 1:
The thinner changes the rheological parameters of the drilling fluid by reducing the interaction between solid particles and fluid molecules. This decreases viscosity and gel strength while maintaining sufficient suspension capability for cutting transport
Solution Approach 2:
The patent creates a composite system by combining the base drilling fluid with the thinner agent. This composite formulation maintains the functional properties of the original fluid while adding the viscosity-reducing effects of the thinner
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 thinner effectively decreases the viscosity of the oil-based drilling fluid by up to 75% of the yield point, enabling efficient reuse and separation of cuttings from the fluid.
Implementation Method 1
The thinner effectively decreases the viscosity of the oil-based drilling fluid by up to 75% of the yield point
Implementation Method 2
the thinner is produced by reacting a poly fatty amide with maleic acid to form a product
Implementation Method 3
diluting the product with a compound selected from the group consisting of oleyl alcohol, fatty acid, and poly condensed fatty acid
Implementation Method 4
A settling pit can be used to separate the cuttings from the drilling fluid
Data Source
AI summary
A thinner that is a poly fatty amide reacted with maleic acid to form a product, and diluting the product with a compound selected from the group consisting of oleyl alcohol, fatty acid, and poly condensed fatty acid is able to reduce the viscosity of oil-based drilling fluid, thus allowing for reuse of the oil-based drilling fluid.