Cable Conveyable Cement Bonding Tool for Well Abandonment
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Solution Overview
Problem
Current methods for well abandonment lack comprehensive systems for concentric cementation and cement bonding, often requiring expensive drilling rigs and are not suitable for a wide range of well diameters, leading to increased costs and inefficiencies in abandoning wells.
Innovation Solution
A method and apparatus for rig-less cement bonding and cementation using a cable conveyable tool string that can deploy and measure cement bonding before and after cement placement, capable of navigating through varying well diameters and debris-filled passages, allowing for efficient abandonment and logging of cement bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drilling rigs are used for well abandonment and cementation, then comprehensive cement bonding operations can be performed, but the cost and operational complexity increase significantly
Solution Approach 1:
The invention extracts the essential cementation and logging functions from the complex drilling rig system, creating a standalone tool string that can be deployed through existing well conduits. This separates the cement bonding operation from the need for expensive drilling equipment while maintaining comprehensive cementation capabilities.
Solution Approach 2:
The tool string is designed to perform multiple functions including cementation, pre-cementation logging, post-cementation logging, and debris removal within a single integrated system. This multi-functionality replaces the need for multiple separate operations that would traditionally require drilling rig intervention.
2Adaptability or versatility
If traditional abandonment methods are used, then cementation can be performed, but the ability to navigate varying well diameters and debris-filled passages is limited
Solution Approach 1:
The tool string incorporates expandable elements and flexible components that allow it to adapt dynamically to varying well diameters and navigate through irregular passages. The system can expand to engage the wellbore wall for cementation and contract to pass through restrictions and debris-filled areas.
Solution Approach 2:
The tool string's physical parameters such as diameter, length, and rigidity can be changed during operation to match the specific conditions of the wellbore. This includes expanding the tool string to fit different well diameters and adjusting its flexibility to navigate through debris-filled passages.
3Measurement precision
If pre-cementation and post-cementation logging are performed separately, then comprehensive cement bonding measurement is achieved, but the time and operational complexity increase
Solution Approach 1:
The invention combines pre-cementation and post-cementation logging capabilities into a single tool string that can perform both measurements during one continuous operation. The system logs the initial state before cementation, performs the cementation operation, then logs the final state without requiring separate trips or operations.
Solution Approach 2:
The tool string performs pre-cementation logging before the cementation operation to establish baseline measurements, then immediately follows with post-cementation logging to assess the results. This preliminary action sequence ensures comprehensive measurement while minimizing the time gap between measurements.
4Reliability
If expensive drilling rigs are deployed for well abandonment, then thorough cementation operations can be performed, but the cost efficiency decreases
Solution Approach 1:
The invention replaces expensive, heavy drilling rig equipment with a lighter, more economical tool string that can be deployed and retrieved through existing well conduits. This disposable-style approach eliminates the need for costly drilling rig mobilization and demobilization while maintaining reliable cementation operations.
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 cost-effective and efficient well abandonment by minimizing the need for expensive drilling rigs, accommodating various well diameters, and ensuring reliable cement bonding, thereby reducing abandonment costs and improving operational efficiency.
Implementation Method 1
transmitting at least one logging signal through the cut or space to measure about the surrounding bore
Data Source
AI summary
Method and apparatus for deploying at least one repeatable signal to empirically measure cement bonding before and after operating a tool string assembly comprising a selectively arrangeable tool assembly of a downhole drive tool usable for operating a downhole placement tool with shaft and axial displacement member extendable and retractable therefrom to radially deploy and operate at least one conduit and downhole coupling tool for placing cement and at least one inner conduit proximally concentrically within a surrounding bore, wherein said drive coupling tool is further usable for transmitting or receiving, through a conductance well element into a memory tool, to measure cement bonding about said surrounding bore before and after concentrically cleaning and coupling cement to at least one conduit and surrounding bore.