Carbon-Rich Layer for Scale Control on Downhole Components
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Solution Overview
Problem
Scale deposits on downhole components in hydrocarbon extraction and sequestration equipment, such as valves and pumps, lead to reduced performance and operational inefficiencies due to fluid flow restrictions and mechanical interference.
Innovation Solution
Application of a carbon rich layer comprising carbides, nitrides, borides, silicides, oxides, or sulfides with a carbon content greater than 40% sp3 carbon and a sp2/sp3 ratio less than 1.5, which reduces scale formation and maintains low friction coefficients on downhole components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional scale control methods are used, then scale formation is reduced, but equipment performance deteriorates due to fluid flow restrictions and mechanical interference
Solution Approach 1:
The patent introduces a carbon-rich layer as an intermediary substance between the scale-forming environment and the equipment surface. This layer acts as a mediator that prevents direct contact between scale deposits and the equipment, thereby reducing scale formation harm while maintaining equipment performance and fluid flow capability.
Solution Approach 2:
The patent converts the harmful scale-forming environment into a beneficial condition by utilizing the presence of scale-forming fluids to deposit carbon-rich material on the equipment surface. The same environmental conditions that would normally cause harmful scale deposits are harnessed to create a protective carbon-rich coating that prevents future scale formation.
2Duration of action of stationary object
If carbon rich layer is applied to prevent scale formation, then equipment longevity is improved, but manufacturing complexity increases
Solution Approach 1:
The patent controls the properties of the carbon-rich layer by adjusting deposition parameters such as carbon content (greater than 40% sp3 carbon), sp2/sp3 ratio (less than 1.5), and layer thickness. By optimizing these parameters, the coating achieves effective scale protection while maintaining a relatively simple structure that does not excessively complicate manufacturing.
Solution Approach 2:
The patent creates a composite structure by combining carbon-rich material with the base equipment substrate. This composite approach provides enhanced scale resistance and equipment longevity while utilizing the inherent properties of both materials, balancing protective functionality with manufacturing feasibility.
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 carbon rich layer inhibits scale formation, enhancing the longevity and operational efficiency of downhole components by preventing fluid flow blockages and ensuring proper mechanical actuation, particularly in systems relying on electrical power.
Implementation Method 1
a carbon rich layer deposited on the substrate
Implementation Method 2
The carbon content has greater than 40 percent sp3 carbon, a sp2/sp3 ratio of the carbon content is less than 1.5
Data Source
AI summary
A system may include a substrate having a tensile strength of at least 10,000 PSI at an ambient temperature. The system may also include a carbon rich layer deposited on the substrate, wherein the carbon rich layer comprises at least one of a carbide, a nitride, a boride, a silicide, an oxide, a sulfide, or a transition-metal or non-metal ceramic-forming element, wherein the carbon rich layer comprises a carbon content including sp2 carbon and sp3 carbon, wherein the carbon content has greater than 40% sp3 carbon, a sp2/sp3 ratio of the carbon content is less than 1.5, or both. The carbon-rich layer is designed to reduce or prevent the formation of adherent scales on flow system surfaces used in well production, fluid injection or gas sequestration, and includes electrically-actuated downhole components having dynamic sliding surfaces.