Electronically Activated Jarring Tool for Stuck Drill String Retrieval
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Solution Overview
Problem
Drilling operations in harsh environments and deeper materials have increased costs and risks, necessitating more complex and costly downhole tools, with existing solutions failing to efficiently address tool string lodgment issues.
Innovation Solution
A downhole tool with a selectively engageable and disengageable mechanism, utilizing a release member that can be electronically controlled to prevent or allow disengagement of tool portions, enabling controlled impact to dislodge stuck tool strings, and featuring impact features to impart force to the tool string.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downhole tools are made more complex to handle harsh environments and deeper drilling, then reliability and capability improve, but device complexity and cost increase
Solution Approach 1:
The tool string is divided into multiple modular portions that can be independently engaged and disengaged. Each portion can be controlled separately through the release member mechanism, allowing selective deployment and retrieval of specific tool sections without affecting the entire tool string.
Solution Approach 2:
The release member provides dynamic control over the engagement state of tool portions, enabling real-time switching between connected and disconnected states. This dynamic capability allows the system to adapt to changing downhole conditions and operational requirements.
2Ease of operation
If a release mechanism is added to enable tool string disengagement, then ease of operation improves, but device complexity increases
Solution Approach 1:
The release member is positioned to be accessible from the surface through the conveyance means, allowing operators to control engagement and disengagement without requiring complex downhole intervention systems. The mechanism serves itself by using the existing tool string tension and movement to facilitate the release action.
Solution Approach 2:
The release member mechanism serves multiple functions: it controls engagement of tool portions, enables selective disengagement for retrieval, and works with the existing conveyance means and tool string tension. This multi-functionality reduces the need for separate dedicated release systems.
3Productivity
If impact features are added to dislodge stuck tool strings, then productivity improves, but device complexity and risk increase
Solution Approach 1:
The impact features convert the harmful stuck condition into a beneficial dislodging action. By applying controlled impact forces through the engagement and disengagement of tool portions, the system uses the sticking force itself as part of the mechanism to generate the impact needed to free the tool string.
Solution Approach 2:
The impact mechanism operates through periodic engagement and disengagement cycles of the tool portions. Each cycle creates an impact event, and multiple cycles can be performed if needed, allowing controlled repeated impact actions without requiring continuous complex actuation.
Data Source
AI summary
An impact apparatus conveyable in a tool string via conveyance means within a wellbore. The impact apparatus comprises a first portion, including a first interface coupled with a first tool string component, a first engagement feature, and a first impact feature. The impact apparatus also comprises a second portion, including a second interface coupled with a second tool string apparatus, a second engagement feature in selectable engagement with the first engagement feature, and a second impact feature positioned to impact the first impact feature in response to disengagement of the first and second engagement features and a tensile force applied across the tool string by the conveyance means. A release member positionable between first and second positions in response to a signal carried by the conveyance means prevents disengagement of the first and second engaging features when in the first position but not the second position.