Downhole Actuator Cycle Selection Controller
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Solution Overview
Problem
Current downhole actuation methods lack flexibility and precision in controlling the release of flowable objects, such as drop-balls, at specific cycles during downhole operations, limiting the ability to vary actuation sequences and positions, and often require mechanical locks that restrict fluid flow before activation.
Innovation Solution
A downhole actuating apparatus with a controller that allows the release of flowable objects at selectable cycles from a sequence, using a mechanical or fluid-operated mechanism, enabling reconfiguration between operations and varying the release position or cycle based on operator selection, and incorporating a biasing mechanism to propel objects into a flowpath.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical lock is used to restrain the flowable object before release, then the object can be held securely in position, but the fluid flow is restricted and the system lacks flexibility in selecting release cycles
Solution Approach 1:
The holding mechanism is segmented into multiple discrete holding positions (first holding position and second holding position) corresponding to different cycles in the sequence. Each position can independently restrain the flowable object, allowing selective release at specific cycles while maintaining secure holding capability throughout the sequence.
Solution Approach 2:
The system transitions from a static mechanical lock to a dynamic controller that can actively select which holding position to release at each cycle. The controller responds to operational conditions and selectively actuates release mechanisms, providing adaptability in release timing while maintaining reliable holding when needed.
2Adaptability or versatility
If the flowable object is released early in the sequence, then operational flexibility is improved, but unnecessary cycles are performed wasting time and energy
Solution Approach 1:
The controller monitors operational conditions and uses feedback to determine the optimal release cycle. By continuously assessing the operational state, the controller can delay release until the precise moment when the flowable object is needed, avoiding premature release and unnecessary cycles while maintaining operational flexibility.
Solution Approach 2:
The system changes the release parameter (cycle number) dynamically based on operational requirements. Instead of a fixed release timing, the controller adjusts which cycle triggers release, allowing optimization of time usage by releasing the flowable object at the most appropriate moment in the sequence.
3Adaptability or versatility
If multiple holding positions are provided for different cycles, then cycle selection flexibility is improved, but the device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors operational conditions, determines optimal release timing, actuates release mechanisms, and manages the sequence of cycles. This multi-functional controller reduces the need for separate complex mechanisms for each holding position, as the single controller coordinates all release decisions across multiple cycles.
Solution Approach 2:
The controller acts as an intermediary between the operational conditions and the multiple holding positions. Rather than having direct complex mechanical linkages from each condition to each holding position, the controller mediates by receiving input from operational sensors and selectively actuating the appropriate release mechanism, simplifying the overall system architecture.
4Adaptability or versatility
If the apparatus is made reconfigurable at surface, then adaptability between operations is improved, but the ease of operation during run-in is reduced
Solution Approach 1:
The apparatus is configured at the surface before run-in with the flowable object positioned in a predetermined holding position. This preliminary configuration eliminates the need for complex adjustments during run-in operations, as the system is pre-set to release at the appropriate cycle based on surface-determined operational requirements.
Solution Approach 2:
The system replaces complex mechanical reconfiguration mechanisms with a controller-based electronic or fluidic control system. The controller can be programmed or adjusted at the surface and then automatically manages the release sequence during run-in and subsequent operations, eliminating the need for manual mechanical adjustments during critical operational phases.
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
Enables precise and flexible actuation of downhole tools, such as valves, by allowing the release of flowable objects at specific cycles and positions, reducing unnecessary cycles, and facilitating efficient fluid flow management, thereby improving operational flexibility and reducing mechanical constraints.
Implementation Method 1
incorporating a biasing mechanism to propel objects into a flowpath
Data Source
AI summary
A downhole actuating apparatus for actuating downhole. The apparatus is actuatable at the downhole location at, upon or during one or more particular cycle/s selectable from a sequence of cycles according to a predetermined selection. The downhole actuation comprises the release of at least one flowable object from the downhole location. The apparatus releases the at least one flowable object from the downhole location at, upon or during the particular cycle selectable from the sequence of cycles.