Low-Pour-Point Wetting Agent Composition for Drilling Fluids
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Solution Overview
Problem
Conventional wetting agents used in drilling fluids have high melting temperatures, making them difficult to mix into the fluid due to their solid state at ambient conditions, and they often form agglomerating wax crystals that hinder flowability.
Innovation Solution
A wetting agent composition comprising unsaturated fatty acids, saturated fatty acids, and a wax inhibitor is formulated to maintain a pour point below 0°C, allowing easy mixing and preventing wax crystal agglomeration, without the need for solvents or pour point depressants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wetting agents with high melting temperatures are used, then the wetting agent provides effective oil-wet surface to drilling solids, but the wetting agent forms solid state at ambient conditions making it difficult to mix into drilling fluid
Solution Approach 1:
The patent changes the physical state parameter of the wetting agent by incorporating it into an aqueous solution, transforming it from a solid at ambient conditions to a liquid state that can be easily mixed into drilling fluids while maintaining wetting effectiveness
Solution Approach 2:
The patent uses water as an intermediary medium to deliver the wetting agent to the drilling fluid, allowing the high-melting-point wetting agent to be transported and mixed in a liquid state without requiring high temperatures or special handling
2Reliability
If conventional wetting agents are used in drilling fluid, then the wetting agent provides oil-wet surface to drilling solids, but the wetting agent forms agglomerating wax crystals that hinder flowability
Solution Approach 1:
The patent uses aqueous solution as an intermediary carrier that prevents direct contact and agglomeration of wetting agent molecules, thereby preventing wax crystal formation while maintaining the wetting agent's effectiveness when it reaches the drilling solids
Solution Approach 2:
The patent changes the physical form of the wetting agent from pure compound to aqueous solution, which alters its crystallization behavior and prevents the formation of agglomerating wax crystals that would hinder flowability
3Ease of operation
If solvents or pour point depressants are added to facilitate wetting agent flow, then the wetting agent becomes easier to mix, but the composition complexity and potential harm to formation increases
Solution Approach 1:
The patent uses water, which is already a primary component of the drilling fluid system, as the solvent medium for the wetting agent, eliminating the need for additional solvents or pour point depressants and avoiding potential formation damage from extra chemicals
Solution Approach 2:
The patent changes the delivery mechanism by using aqueous solution at ambient temperature, eliminating the need for thermal processing or additional chemical additives to achieve proper flow and mixing characteristics
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 composition ensures the wetting agent remains flowable at low temperatures, enhancing the stability and compatibility of drilling fluids by reducing wax crystal formation, thereby improving mixing and fluid properties.
Implementation Method 1
a wax inhibitor formulated and configured to inhibit the formation of wax crystals that agglomerate and gel in the wetting agent composition
Implementation Method 2
a wetting agent formulated and configured to provide an oil-wet surface to drilling solids and particles in the drilling fluid to reduce or prevent agglomeration and the particles from settling in the drilling fluid
Data Source
AI summary
A wetting agent composition for drilling a borehole includes a wetting agent including unsaturated fatty acids and at least some saturated fatty acids, and a wax inhibitor formulated and configured to inhibit the formation of wax crystals that agglomerate and gel in the wetting agent composition, wherein the wetting agent composition exhibits a pour point lower than about 0° C. Related methods of forming a borehole and related drilling fluids are also disclosed.