Wellbore Tubular Nozzle Erosion Mitigation
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Solution Overview
Problem
Wellbore tubulars with nozzles fail in challenging conditions such as steam or acid injection operations due to erosion and flow control issues, necessitating improved designs that can handle abrasive and corrosive fluids effectively.
Innovation Solution
A wellbore tubular design featuring a base pipe with radially extending ports, a nozzle with a non-linear orifice configuration, and a diffuser tube to manage fluid flow, including a T-shaped diffuser with inlet and outlet ports, which redirects and diffuses fluid flow to mitigate erosion and control pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional nozzle is used in the wellbore tubular, then fluid flow control is achieved, but the nozzle fails due to erosion from steam or acid injection operations
Solution Approach 1:
The nozzle is divided into multiple apertures (primary aperture and secondary aperture) instead of a single opening. This segmentation distributes the fluid flow across multiple paths, reducing the erosion concentration on any single point and thereby improving the nozzle's resistance to steam or acid erosion.
Solution Approach 2:
The nozzle design transitions from a single-dimensional radial aperture to a multi-dimensional configuration with primary and secondary apertures positioned at different angles and depths. This spatial arrangement creates a three-dimensional flow pattern that reduces direct impingement of erosive fluids on the nozzle structure.
2Productivity
If a simple orifice is used, then manufacturing is easy, but fluid flow control and pressure management are insufficient
Solution Approach 1:
The orifice is segmented into multiple apertures with different orientations (radial and tangential components). This segmentation enables independent control of flow characteristics for each aperture, allowing precise management of fluid flow and pressure while maintaining a relatively simple overall structure.
Solution Approach 2:
Different portions of the orifice have different properties - the primary aperture has a first orientation and the secondary aperture has a second orientation. This local differentiation allows specific regions to optimize for particular flow control functions, improving overall fluid management capability.
3Object-affected harmful factors
If fluid flows directly through the nozzle, then flow path is simple, but erosion damage to surfaces increases
Solution Approach 1:
The flow path is segmented into multiple directional components through the primary and secondary apertures. This creates a distributed flow pattern that reduces the velocity and impact energy of the fluid at any single point, thereby minimizing erosion damage to the nozzle and surrounding surfaces.
Solution Approach 2:
The flow path transitions from a direct linear path to a multi-dimensional trajectory with radial and tangential components. This three-dimensional flow arrangement increases the path length and distributes the erosive force across multiple directions, reducing concentrated damage.
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 design enhances fluid flow control and resistance to erosion, maintaining structural integrity and flow management in harsh conditions, such as steam injection, by redirecting and diffusing fluid energy, thereby reducing damage to surfaces and maintaining effective operation.
Implementation Method 1
a diffuser tube on the outer surface to receive fluid exiting the orifice, the diffuser tube including an inlet port opening to an inner diameter within a tubular wall of the diffuser tube, a fluid diffusing wall at a bend within the diffuser tube
Data Source
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AI summary
A wellbore tubular comprising: a base pipe including a wall; a port through the wall providing access between an inner diameter of the base pipe and an outer surface of the base pipe; a nozzle in the port, the nozzle including an orifice including a bend therein; and a diffuser positioned on the outer surface aligned with the orifice.