Downhole Density Sensor Using Buoyant Floats
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies lack an effective method to accurately quantify the density of production fluids in wellbores, which is crucial for optimizing hydrocarbon extraction and managing fluid composition.
Innovation Solution
A density sensor system is deployed in the wellbore, comprising float chambers and floats with known densities, along with sensors to determine whether the floats sink or float within the production fluid, allowing for the calculation of the fluid's unknown density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional fluid sampling and laboratory analysis methods are used, then fluid composition data can be obtained, but the measurement time delay and loss of production optimization opportunities worsen
Solution Approach 1:
The patent replaces mechanical/chemical laboratory analysis methods with optical sensing technology. The sensor system uses light absorption and scattering principles to measure fluid density and composition in real-time, eliminating the need for physical sampling and laboratory processing while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces an optical intermediary (light) as the mediator between the production fluid and the measurement system. By using light interaction with the fluid to derive composition information, the system achieves rapid, real-time measurements without direct contact or time-consuming physical analysis procedures.
2Productivity
If real-time fluid density measurement is implemented, then production optimization can be improved, but the device complexity increases
Solution Approach 1:
The patent designs a multi-functional sensor system that simultaneously measures fluid density, detects fluid type (oil, water, gas), and provides composition information through a single integrated device. This universal approach consolidates multiple measurement capabilities into one system, reducing overall complexity compared to using separate specialized instruments.
Solution Approach 2:
The patent measures fluid composition by detecting changes in optical parameters (light absorption and scattering characteristics) as light passes through the production fluid. By monitoring these parameter variations, the system derives density and composition information without complex mechanical or chemical analysis apparatus.
3Measurement precision
If float chambers and multiple floats with known densities are used, then density measurement accuracy is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent employs simple, inexpensive float elements made from materials with known densities that can be easily manufactured and replaced if needed. These floats are basic buoyancy devices rather than complex instruments, making them cost-effective and simple to produce while providing reliable density measurement data.
Solution Approach 2:
The patent divides the density measurement function into multiple discrete float elements, each with a specific known density. By using multiple floats rather than a single complex instrument, the system achieves more accurate density determination through comparative measurements while keeping each individual float component simple and easy to manufacture.
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 system provides an accurate approximation of the production fluid's density, enabling better fluid management and optimization of hydrocarbon extraction processes.
Implementation Method 1
float chambers and floats with known densities, along with sensors to determine whether the floats sink or float within the production fluid
Data Source
AI summary
Provided is a downhole tool and a well system. The downhole tool, in one aspect, includes a tubular providing one or more production fluid flow paths for a production fluid. The downhole tool, according to this aspect, further includes one or more float chambers located within the tubular, and two or more floats located within the one or more float chambers. In one aspect, a first of the two or more floats has a first density (ρ1) between a density of gas (ρg) and a density of oil (ρo), and a second of the two or more floats has a second density (ρ2) between the density of oil (ρo) and a density of water (ρw). The downhole tool, according to this aspect, further includes two or more non-contact proximity sensors configured to sense a radial location of the two or more floats to determine a gas:oil ratio and oil:water ratio.