Combined Valve System Hydraulic Control Line Reduction
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Solution Overview
Problem
In well operations, the use of multiple hydraulic control lines for operating formation isolation and circulating valves is problematic, as it complicates the process and increases the risk of formation damage during ESP workovers.
Innovation Solution
A valve system with combined formation isolation and circulating valves that can be operated independently via less than three hydraulic control lines, utilizing a mechanical linkage and potentially a single hydraulic control line with a downhole switch, to simplify the control and reduce the number of lines required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple hydraulic control lines are used to operate formation isolation and circulating valves independently, then valve control reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines two separate valve control functions into a single hydraulic control line by integrating a formation isolation valve and a circulating valve into a unified valve assembly. The single hydraulic control line simultaneously actuates both valves through shared hydraulic pressure, reducing the number of control lines from four to one while maintaining independent valve operation capability.
Solution Approach 2:
The single hydraulic control line is designed to perform multiple functions by sequentially controlling different valves. The same hydraulic line can isolate the formation valve at one time and control the circulating valve at another time, making the hydraulic system universal and multi-functional rather than requiring dedicated lines for each valve.
2Ease of operation
If four hydraulic control lines are used to operate both valves, then independent valve operation is achieved, but ease of operation deteriorates
Solution Approach 1:
The patent merges the control of two separate valves into a single hydraulic control line, simplifying the operational interface. Instead of managing four separate control lines, operators only need to manage one hydraulic line that can sequentially actuate both the formation isolation valve and the circulating valve, significantly improving ease of operation.
3Reliability
If multiple hydraulic control lines are routed to the surface, then valve control precision is maintained, but loss of time increases
Solution Approach 1:
The valve assembly is pre-configured with integrated formation isolation and circulating valves that can be sequentially actuated by a single hydraulic control line. This preliminary integration allows for faster valve operations during well operations, reducing the time required for fluid circulation and well control maneuvers while maintaining precise valve control through the unified hydraulic actuation system.
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
This solution allows for efficient and independent operation of the valves with fewer hydraulic control lines, reducing the complexity and risk of formation damage during well operations, while maintaining effective control over the flow of fluids.
Implementation Method 1
The formation isolation valve and the circulating valve are independently actuable via hydraulic inputs received through less than three hydraulic control lines
Data Source
AI summary
A technique facilitates operation of a valve system a having combined valve such as a combined formation isolation valve and a circulating valve. In well operations, the valve system is deployed downhole into a wellbore on a tubing string. The formation isolation valve and the circulating valve are operable independently via inputs, e.g. hydraulic inputs provided through less than three hydraulic control lines. The formation isolation valve and the circulating valve may be coupled by a mechanical linkage, which enables operation of the two valves via the hydraulic control lines. In some embodiments, the formation isolation valve and the circulating valve may be operated via an integrated shifting tool.