Downhole Triggering Tool Timing Mechanism
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Solution Overview
Problem
Existing downhole well bore tools require complex arrangements of conduits and power cables to ensure reliable and controlled activation from surface level, which complicates the activation process and increases the risk of errors.
Innovation Solution
A selectively operable timing device in communication with a force reducing mechanism, allowing a tool member to be restrained and activated by an external force at a precise time, using a fluid actuated piston arrangement and a triggering tool with a release mechanism that reduces the external force required for activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex conduit systems and power cables are used to activate downhole tools from surface level, then reliable and controlled operation is achieved, but device complexity increases
Solution Approach 1:
The patent extracts the timing and control function from the surface-level conduit system and relocates it to a self-contained timing device within the downhole tool. This eliminates the need for complex surface conduits and power cables while maintaining reliable operation through the internal timing mechanism that automatically activates the tool at the predetermined time.
Solution Approach 2:
The downhole tool is equipped with an internal timing device that autonomously controls the activation sequence without requiring external control from surface level. The timing device automatically releases the tool member at the predetermined time, making the system self-sufficient and eliminating the need for complex surface-level monitoring and control systems.
2Measurement precision
If force reducing mechanism is used to restrain external force on tool member, then precise timing actuation is achieved, but device complexity increases
Solution Approach 1:
The patent introduces a force reducing mechanism as an intermediary component between the tool member and the external force. This mechanism selectively restrains the external force during the timing period and then releases it at the predetermined time, enabling precise timing actuation. The mechanism acts as a mediator that controls force transmission to achieve accurate timing while maintaining a relatively simple overall structure.
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
Simplifies the activation process of downhole tools by enabling precise and reliable operation without the need for complex conduit systems, reducing the risk of errors and improving the efficiency of tool deployment and retrieval.
Implementation Method 1
a fluid actuated piston arrangement in selective fluid communication with a fluid source
Implementation Method 2
the external force being transmitted to the release mechanism via a force reducing mechanism
Data Source
AI summary
Disclosed herein is a downhole triggering tool. The tool includes a tool-engaging portion movable from a first position to a second position under the action of an external force, and a release mechanism for selectively permitting movement of the tool-engaging portion from the first position to the second position, the tool-engaging portion is restrained against the external force by the release mechanism through a plurality of force reducing mechanisms.