Subsea Apparatus for Tree Running and Plug Retrieval
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Solution Overview
Problem
Deep water oil field operations are hindered by the lengthy process of deploying and installing subsea production trees, which increases operational costs and time, and batch operating methods can negatively impact well productivity by delaying well completions and clean-up operations.
Innovation Solution
A self-contained apparatus for remotely running a subsea production tree and de-suspending a well, comprising a tree running tool, plug retrieval tool, and tool deployment device, which can be operated hydraulically and controlled by a remotely operated vehicle (ROV), allowing for quick operations without the need for a riser or expensive deployment vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional batch drilling and completion operations are used, then rig operation efficiency is improved, but well productivity deteriorates due to lengthy delays between completions and clean-up operations
Solution Approach 1:
The patent combines multiple operations (tree deployment, plug removal, and well clean-up) into a single integrated apparatus and procedure. The self-contained apparatus performs both tree installation and subsequent plug retrieval in one continuous operation, eliminating the time delay between completions and clean-up that plagues traditional batch operations.
Solution Approach 2:
The apparatus is designed as a multi-functional system that can perform multiple functions: deploying the production tree, retrieving the suspension plug, and facilitating well clean-up. This universal apparatus replaces the need for separate specialized equipment for each operation, enabling continuous workflow without rig repositioning or equipment changes.
2Reliability
If deep water tree deployment is performed using traditional methods, then tree installation is achieved, but operational time and costs increase significantly
Solution Approach 1:
The suspension plug is pre-installed in the wellbore before tree deployment, and the apparatus is designed to retrieve this plug as part of the same operation that installs the tree. This preliminary preparation allows the well to be immediately productive upon tree installation, eliminating post-installation delays.
Solution Approach 2:
The self-contained apparatus acts as an intermediary system that bridges tree deployment and well clean-up operations. By incorporating the plug retrieval function within the tree deployment apparatus itself, it mediates between these previously separate operations, enabling seamless transition from installation to production.
3Loss of time
If a self-contained apparatus is used for tree deployment and plug retrieval, then operational time is reduced, but device complexity increases
Solution Approach 1:
The apparatus employs a nested structure where the plug retrieval tool is contained within or integrated with the tree deployment apparatus. The retrieval tool can be deployed through the tree structure itself, allowing compact packaging and streamlined operation while maintaining multiple functions.
Solution Approach 2:
The self-contained apparatus is divided into functional modules: tree deployment mechanism, plug retrieval tool, and hydraulic control system. This segmentation allows each component to be optimized independently while working together as an integrated system, managing complexity through modular design.
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 reduces operational time and costs by enabling rapid tree deployment and well de-suspension, independent of tree delivery schedules, thereby enhancing well productivity and efficiency in deep water environments.
Implementation Method 1
a tool deployment device in hydraulic communication with at least the plug retrieval tool to hydraulically operate the plug retrieval tool
Data Source
AI summary
An apparatus (10) for remotely running a subsea production tree (12) and desuspending a well is described. The apparatus comprises a tree running tool (16) adapted to be connected to a production tree, at least one downhole tool, at least one of the tools being a plug retrieval tool (22) and a tool deployment device (18) in hydraulic communication with at least the plug retrieval tool to hydraulically operate the plug retrieval tool.