Modular Packer Bypass With Check-Valve Lift-Gas Routing
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Solution Overview
Problem
Existing packer bypasses in gas-lift processes are expensive, reduce lift gas flow rates, and can cause damage to production tubing due to fluid cuts or erosion.
Innovation Solution
A modular packer bypass assembly with a check valve system that allows lift gas to bypass the packer, ensuring a separate flow path for lift gas and produced fluids, preventing damage and maintaining efficient gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a packer bypass is installed to allow lift gas to reach the annulus below the packer, then gas-lift functionality is enabled, but the bypass reduces lift gas flow rates and increases cost
Solution Approach 1:
The bypass assembly is divided into separate functional segments: a packer interface portion, a bypass flow path portion, and a production tubing portion. This segmentation allows each component to be optimized independently - the packer interface ensures proper sealing and connection, while the bypass flow path is designed with sufficient diameter and length to maintain gas flow rates without excessive pressure drop.
Solution Approach 2:
The bypass assembly acts as an intermediary component between the production tubing and the annulus below the packer. It provides a controlled transition path that mediates between the high-pressure gas lift system and the lower-pressure annulus environment, enabling gas flow while maintaining system integrity and minimizing flow rate reduction.
2Reliability
If a packer bypass is installed to enable lift gas flow, then gas-lift operation is achieved, but the bypass increases cost
Solution Approach 1:
The bypass assembly is designed as a multi-functional component that simultaneously provides: (1) a flow path for lift gas below the packer, (2) structural support for the production tubing, (3) a mounting interface for the packer, and (4) protection against fluid cuts. This consolidation of multiple functions into a single assembly reduces the total number of components needed, simplifies installation, and lowers overall cost compared to using separate components for each function.
3Reliability
If high fluid velocities occur in the bypass crossover, then lift gas can reach the annulus below the packer, but fluid cuts or erosion damage the production tubing
Solution Approach 1:
The bypass assembly incorporates preliminary protective measures against erosion and fluid cuts through its design features: (1) The bypass flow path is positioned and oriented to minimize direct impingement of high-velocity fluids on the production tubing wall, (2) The crossover geometry is designed with smooth transitions and adequate radius to reduce turbulence and localized high-velocity jets, and (3) The assembly includes structural reinforcement in areas susceptible to erosion damage.
Solution Approach 2:
The design converts the potentially harmful high-velocity fluid flow into a beneficial feature by directing it through a controlled path that maintains lift gas delivery effectiveness while reducing erosive effects. The bypass flow path geometry transforms the harmful concentrated jet into a more distributed flow pattern that achieves the same gas delivery function with reduced wall shear stress and erosion potential.
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 solution provides a cost-effective and damage-resistant bypass that maintains lift gas flow rates, reducing erosion and fluid cuts in production tubing.
Implementation Method 1
A modular packer bypass assembly with a check valve system that allows lift gas to bypass the packer
Data Source
AI summary
Described herein are embodiments of systems, apparatuses, and methods that include an improved packer bypass assembly. The packer bypass assembly includes a first end and a second end, where a primary bore extends between the first and second end. The packer bypass assembly further includes a bypass bore through which flow may travel separate from that in the primary bore. The bypass bore may include a check valve that only permits flow in one direction. By providing two flow bores that support flow in opposite directions in the same packer bypass assembly, gas injected into an annulus between the casing and the packer bypass assembly can “bypass” the packer assembly and travel to an injection valve situated in the well below the packer.