Hydraulic Dart Actuation for Multi-Zone Well Completion
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Solution Overview
Problem
Current methods for treating multiple well zones in hydrocarbon reservoirs are inefficient, requiring sequential interventions and size-graduated drop balls to control fluid flow, which can be cumbersome and time-consuming, limiting productivity and completion efficiency.
Innovation Solution
A system utilizing hydraulic darts that selectively engage with internal profiles of flow control devices, allowing for sequential actuation of flow control devices along a wellbore without requiring matching diameters, enabling efficient control of fluid flow and treatment across multiple well zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential interventions with size-graduated drop balls are used to treat multiple well zones, then fluid flow control is achieved, but completion cycle times increase and productivity decreases
Solution Approach 1:
The wellbore is divided into multiple intervals with flow control devices positioned at different depths. Each flow control device can be independently actuated by hydraulic darts, allowing sequential treatment of multiple zones without requiring sequential interventions with size-graduated drop balls. This segmentation enables parallel processing of different well zones.
Solution Approach 2:
Hydraulic darts serve as intermediaries to actuate the flow control devices. Instead of using size-graduated drop balls that require manual intervention and physical engagement with progressively increasing diameter seats, hydraulic darts are pumped downhole and selectively engage with internal profiles of flow control devices, enabling more efficient and less time-consuming activation.
2Ease of operation
If size-graduated drop balls are used to engage seats of progressively increasing diameter, then flow control is achieved, but device complexity and operational difficulty increase
Solution Approach 1:
The flow control devices are designed with universal internal profiles that can be engaged by hydraulic darts of a standardized configuration. Instead of requiring size-graduated drop balls with progressively increasing diameters for different zones, a single hydraulic dart design can actuate multiple flow control devices throughout the wellbore, simplifying the overall system.
Solution Approach 2:
The mechanical engagement system using size-graduated drop balls and progressively increasing diameter seats is replaced with a hydraulic actuation system. Hydraulic darts are pumped downhole and selectively engage with internal profiles of flow control devices through hydraulic pressure, eliminating the need for complex mechanical size-gradation and reducing operational difficulty.
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 approach reduces completion cycle times, increases productivity, and enhances recoverable reserves by allowing for precise and efficient stimulation and treatment of multiple well zones with a common diameter flow passage, improving overall well efficiency.
Implementation Method 1
Hydraulic darts are designed for selective engagement with the internal profiles of specific flow control devices, and each dart may be moved downhole for engagement with and activation of a specific flow control device
Data Source
AI summary
A technique provides for stimulating or otherwise treating multiple intervals/zones of a well by controlling flow of treatment fluid via a plurality of flow control devices. The flow control devices are provided with internal profiles and flow through passages. Hydraulic darts are designed for selective engagement with the internal profiles of specific flow control devices, and each hydraulic dart may be moved downhole for engagement with and activation of a specific flow control device.