Side Pocket Mandrel Double Valve System for Continuous Well Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current valve systems in oil and gas wells, particularly in artificial lift systems, face challenges in controlling the flow of injection gas effectively, leading to decreased production flow and requiring well shutdowns for maintenance, which increases production costs and results in production standstill.
Innovation Solution
A side pocket mandrel with two independently retrievable valves forming a double fluid barrier, allowing for controlled injection of pressurized gas into the production tubing, enabling maintenance without shutting down the well and optimizing production flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single valve system is used in the side pocket mandrel, then the device complexity is reduced, but the reliability decreases because the entire system must be shut down for maintenance
Solution Approach 1:
The valve system is divided into two independently operable valves (first valve and second valve) within the side pocket mandrel. Each valve can be controlled separately, allowing one valve to be maintained or replaced while the other remains operational, thus maintaining production continuity while enabling independent maintenance of each valve component.
2Ease of repair
If the well is shut down for valve maintenance, then the valves can be properly maintained, but the productivity decreases due to production standstill
Solution Approach 1:
The system uses two separate valves that can be independently controlled and maintained. When one valve requires maintenance, the other valve remains open to maintain production flow. The valves are positioned within the side pocket mandrel structure that allows for individual retrieval and maintenance of each valve without requiring complete system shutdown.
3Productivity
If pressurized gas is injected into the production tubing, then the production flow is enhanced, but the harmful factors increase if gas injection is not properly controlled
Solution Approach 1:
The valve system incorporates pressure-actuated mechanisms that respond to downhole pressure conditions. The valves automatically open or close based on pressure differentials, providing feedback control of the gas injection process. This ensures that pressurized gas is injected only when needed and at appropriate rates, enhancing production while preventing harmful effects from uncontrolled injection.
Solution Approach 2:
The system controls gas injection by changing the state of the valves (open/closed) based on pressure parameters. The valves are designed to respond to specific pressure thresholds, automatically adjusting the gas injection parameters to optimize production while preventing harmful effects from excessive or uncontrolled injection.
4Adaptability or versatility
If multiple valves are arranged in the side pocket mandrel, then the adaptability increases for different operations, but the device complexity increases
Solution Approach 1:
The side pocket mandrel structure is designed to accommodate multiple valves and different well tools within a single integrated component. The mandrel can be configured with first and second valves, as well as provisions for other downhole tools, providing universal functionality for various operations including gas injection, fluid injection, and tool deployment without requiring separate dedicated structures for each function.
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 double fluid barrier system enhances production flow by allowing independent maintenance of well tools and equipment, reducing production standstill and costs by enabling continuous operation during maintenance and optimizing gas injection.
Implementation Method 1
The gas lift valves may then be positioned or arranged in the production tubing itself, or they may be arranged in so-called side pocket mandrels
Data Source
AI summary
A valve system for use in a wellbore includes a side pocket mandrel and one or more well tools, where the side pocket mandrel includes an elongated body section provided with a connector at its ends, the elongated body section being provided with a substantially fully open main bore for alignment with the well tubing and an offset side pocket bore. At least one through opening is provided in the side pocket mandrel, leading into the side pocket bore, and at least one through opening is provided in the internal wall, leading into the main bore, where the at least two openings are in fluid communication through the side pocket bore, in which side pocket bore at least two valves are arranged in series to form a double fluid barrier between the main bore and an outside of the pocket mandrel, the at least two valves being independently retrievable through at least one installation opening arranged in the internal wall of the side pocket mandrel.