Multi-Function Downhole Completion Tool
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Solution Overview
Problem
Current well completion methods require repeated tool pulling and hiring of specialists, are time-consuming, and inefficient, especially in highly deviated wells, due to the limitations of traditional wire-line and coiled tubing operations.
Innovation Solution
A downhole tool with a flapper, piston, and spring-loaded flow tube configuration that allows self-filling of tubing, testing at various pressures, and formation of a positive plug, enabling multiple completion-related operations without repeated tool retrieval and reducing the need for specialists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional wire-line or coiled tubing operations are used for well completion testing and plugging, then specialized equipment and specialists are required, but the operational time and costs increase significantly
Solution Approach 1:
The downhole tool performs multiple functions (testing, plugging, unplug- ping, self-filling) autonomously without requiring repeated tool pulling or specialized wire-line/coiled tubing operations. The tool serves itself by integrating all necessary functions into a single downhole device that can be deployed once and operated through sequential pressure-driven mechanisms.
Solution Approach 2:
The downhole tool combines multiple completion functions into a single device: it can test the wellbore at various pressures, form a positive plug, perform unplugging operations, and enable self-filling of tubing. This multi-functional approach eliminates the need for multiple specialized tools and operations.
2Adaptability or versatility
If traditional wire-line or coiled tubing operations are used for well completion testing and plugging, then specialized equipment and specialists are required, but the equipment complexity and costs increase
Solution Approach 1:
The downhole tool integrates multiple completion functions (testing, plugging, unplugging, self-filling) into a single device, providing versatility without requiring multiple specialized tools. This reduces equipment complexity compared to using separate wire-line, coiled tubing, and other specialized equipment for each function.
Solution Approach 2:
The invention merges previously separate operations (testing, plugging, unplugging, self-filling) into a single integrated downhole tool. By combining these functions in one device, the overall equipment complexity is reduced while maintaining adaptability to various completion scenarios.
3Adaptability or versatility
If repeated tool pulling is required for different completion operations, then multiple operations can be performed, but the operational time and efficiency decrease
Solution Approach 1:
The downhole tool provides operational flexibility by performing multiple completion functions (testing at various pressures, plugging, unplugging, self-filling) within a single deployment. This eliminates the need for repeated tool pulling while maintaining the ability to adapt to different operational requirements, thereby significantly improving productivity.
4Ease of operation
If traditional completion methods are used in highly deviated wells, then standard procedures can be followed, but the operational difficulty and time increase
Solution Approach 1:
The downhole tool is designed to operate autonomously in various well configurations including highly deviated wells. The pressure-driven mechanisms and internal component design allow the tool to function without requiring specialized procedures for deviated wells, maintaining ease of operation while adapting to different well geometries.
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
Facilitates efficient self-filling of tubing, thorough testing, and secure plugging, reducing operational time and costs, and is effective in both vertical and deviated wells by allowing unrestricted flow during production.
Implementation Method 1
a spring-loaded flow tube, collectively configured to provide multiple capabilities when used with a tubing string
Implementation Method 2
a piston and a spring-loaded flow tube, collectively configured to provide multiple capabilities when used with a tubing string
Data Source
AI summary
A multi-functional completion tool which may be lowered into a wellbore coupled to a length of tubing, and then utilized to test various lengths of the tubing at pressure. The tool may also function as a positive plug, may be used to set a packer, and is also useable as a tubing self-filling tool. Various retention elements are disposed within the tool and configured to release at predetermined pressures, or within predetermined ranges of pressure, thereby transforming the tool from a first configuration to a second configuration depending on the desired function. The tool may use a flapper mechanism to regulate passage of fluids through the housing, and a piston and/or flow tube may also be utilized to lock the flapper in an open or closed orientation within the housing.