Hydraulic Setting Tool Metering Module Differential Pressure Actuation
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Solution Overview
Problem
Existing downhole actuation tools face challenges in applying a controlled and gradual force to actuate components at different pressure levels, requiring complex pressure management and sequential actuation processes.
Innovation Solution
A setting tool with a metering module that creates a differential pressure by gradually bleeding fluid from a first chamber to an annulus, allowing a setting piston to apply a gradually increasing force on downhole components, enabling actuation at varying force levels without sequential pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sequential pressure changes are used to actuate components at different pressure levels, then components can be actuated in the desired order, but the actuation process becomes complex and requires manual pressure adjustments
Solution Approach 1:
A metering valve is introduced as an intermediary component between the fluid source and the actuator. This valve automatically meters and controls the fluid flow rate, creating a differential pressure that gradually actuates the packer element. The metering valve serves as a mediator that eliminates the need for complex sequential pressure management by operators, automatically controlling the actuation sequence through its flow restriction mechanism.
Solution Approach 2:
The system is designed to automatically manage the actuation sequence without requiring manual pressure adjustments. The metering valve self-regulates the fluid flow, and the differential pressure mechanism automatically sequences the actuation of components based on their pressure requirements. This self-service approach simplifies operation while managing the complexity internally through automatic pressure differential control.
2Ease of operation
If constant pressure is maintained in the borehole string, then the actuation process is simplified, but components cannot be actuated at different pressure levels
Solution Approach 1:
The system maintains constant pressure in the borehole string (overall system) while creating localized differential pressure through the metering valve. The metering valve restricts fluid flow to specific chambers, creating locally varied pressure conditions that enable different components to be actuated at different effective pressure levels. This local quality approach allows constant system pressure with variable component actuation pressures.
Solution Approach 2:
The metering valve acts as an intermediary that transforms constant system pressure into variable component pressure. By restricting fluid flow through the valve, the system creates a pressure differential between chambers, enabling components to experience different effective pressure levels even though the overall system pressure remains constant. This mediator component bridges the gap between constant system pressure and variable actuation requirements.
3Reliability
If gradual force application is used to actuate components, then components are protected from sudden stress, but the actuation time is extended
Solution Approach 1:
The metering valve changes the flow rate parameter to control the gradual application of force. By restricting fluid flow through a calibrated restriction, the valve controls the rate at which pressure differential builds up, thereby controlling the speed of actuation. This parameter control allows gradual force application that protects components while maintaining reasonable actuation timing through proper valve design.
Solution Approach 2:
The metering valve applies partial fluid flow restriction rather than complete blockage or full flow. This partial action creates a controlled, gradual pressure differential that builds force progressively on components. The restriction is calibrated to provide enough flow limitation for gradual actuation while maintaining sufficient flow rate to complete the process in acceptable time, avoiding both sudden full-force application and excessively slow actuation.
Data Source
AI summary
A setting tool for actuating a downhole component includes an inner tubular configured to be connected in fluid communication with a borehole string, a housing configured to define a first fluid chamber and a second fluid chamber isolated from the first fluid chamber and in fluid communication with the inner tubular, and a setting piston in pressure communication with the second fluid chamber. The setting tool includes a metering module coupled to the housing and disposed at an end of the first fluid chamber, the metering module including a fluid path forming a restriction therein, and an outlet connected to the fluid path. The outlet is configured to be opened to permit fluid to flow out of the first chamber at a controlled rate to generate a differential pressure between the first and second chambers that causes the setting piston to apply a gradually increasing force on the component.