Synthetic Drilling Fluid Oligomerization for Environmental Safety
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Solution Overview
Problem
Conventional drilling fluids used in environmentally sensitive areas, such as marine environments, often have poor biodegradability and toxicity, which poses challenges for environmental safety, and there is a need for drilling fluids with low pour point and reduced pollution characteristics.
Innovation Solution
A drilling fluid process involving oligomerization of 1-hexene to form an oligomer portion predominantly comprising trimers and tetramers, blended with a linear olefin portion, using acid type catalysts, to create a fluid with improved biodegradability and toxicity profiles, meeting stringent environmental standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional drilling fluids (diesel and kerosene hydrocarbons) are used, then lubrication and cuttings transport functions are achieved, but biodegradability is poor and toxicity is high
Solution Approach 1:
The patent changes the chemical composition parameters by using synthetic hydrocarbons with specific carbon numbers (C12-C24) and controlled molecular structures instead of conventional diesel and kerosene, achieving improved biodegradability and reduced toxicity while maintaining drilling fluid functionality
Solution Approach 2:
The drilling fluid uses a composite formulation combining multiple synthetic hydrocarbon components with different carbon numbers and molecular structures, creating a synergistic mixture that achieves both environmental compliance and functional performance
2Object-affected harmful factors
If synthetic drilling fluids are formulated to improve biodegradability, then environmental safety is enhanced, but pour point increases
Solution Approach 1:
The patent carefully selects and controls the carbon number distribution (C12-C24 range) and molecular structure parameters of synthetic hydrocarbons to achieve an optimal balance between biodegradability and pour point, preventing excessive wax crystallization while maintaining environmental safety
Solution Approach 2:
The formulation uses a distribution of different carbon numbers rather than a single component, where lighter components suppress wax crystallization and higher components provide biodegradability, creating localized functional zones within the fluid composition
3Object-affected harmful factors
If drilling fluids meet stringent biodegradability and toxicity requirements, then environmental compliance is achieved, but availability is reduced
Solution Approach 1:
The synthetic hydrocarbon formulation is designed to serve multiple functions simultaneously: it provides lubrication, cuttings transport, temperature control, and environmental safety, making it a universal drilling fluid suitable for various applications including environmentally sensitive areas
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 resulting drilling fluid exhibits enhanced biodegradability and reduced toxicity, meeting or exceeding environmental safety criteria, including high biodegradation and sediment toxicity ratings, while maintaining a low pour point and suitable viscosity, making it suitable for use in environmentally sensitive areas.
Implementation Method 1
wherein the oligomer portion is formed with acid type catalyst
Data Source
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AI summary
Drilling fluids and processes for making drilling fluids for use in environmentally sensitive areas are provided. The environmentally friendly drilling fluid includes a linear olefin portion that includes linear alpha olefins and/or linear internal olefins with carbon numbers of about 6 carbons to about 30 carbons; and an oligomer portion comprising dimers, trimers, tetramers, and/or heavier oligomers of olefins, wherein the olefins have a carbon number of between about 4 carbons and about 24 carbons, and the oligomer portion includes at least about 50 mole percent of trisubstituted olefin. The drilling fluid has a pour point of about -10 °C or lower, a biodegradation ratio of about 1.0 or less, a toxicity ratio of about 1.0 or less, a Marine Bodis of at least about 60%, a flash point of about 110 °C or higher, a viscosity less than about 4 cSt at 40 °C, a density of about 0.78 to about 0.83 gram/ml, and a log Pow of greater than about 3.