Bottom Hole Assembly Jarring Tool With Selective Friction Oscillation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Drilling tools often face significant frictional forces when lowering tubing into wellbores, leading to difficulties in reaching desired depths and potential locking issues, which current extended reach tools do not adequately address due to their lack of an inactive mode, causing damage to the drill string.
Innovation Solution
A downhole tool with a fluid passageway and a fluid flow control valve that can be activated in two modes: oscillation frequency to reduce friction and jarring effect to free stuck tools, featuring a motor, flow detection module, and motor control module to manage fluid flow and vibrations, allowing unmodulated flow when inactive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If extended reach tools are activated continuously to overcome frictional forces, then drill string movement is improved, but damage to the drill string occurs
Solution Approach 1:
The extended reach tool is activated in periodic intervals rather than continuously. The controller receives signals from the surface indicating when frictional forces exceed a threshold, activates the tool for a predetermined time period to overcome the friction, then deactivates it. This periodic activation pattern prevents continuous vibration and potential damage to the drill string while still effectively overcoming frictional forces when needed.
2Object-affected harmful factors
If extended reach tools are not activated, then drill string damage is prevented, but frictional forces prevent reaching required depth
Solution Approach 1:
The system incorporates a feedback mechanism where a controller on the drill string receives signals from the surface about downhole conditions. When the controller detects that frictional forces between the tubing and casing/formation wall exceed a predetermined threshold, it automatically activates the extended reach tool. This feedback-based activation ensures the tool is only operated when necessary to overcome excessive friction, enabling the drill string to reach required depths without unnecessary activation that could cause damage.
3Productivity
If extended reach tools operate continuously, then friction is overcome, but operational efficiency decreases due to unnecessary activation
Solution Approach 1:
The extended reach tool operates in periodic intervals based on actual downhole conditions rather than continuously. The controller monitors frictional forces and activates the tool only when thresholds are exceeded, using vibration motors or fluid pumps for predetermined time periods. This demand-based periodic operation significantly improves operational efficiency by eliminating energy waste from continuous operation while maintaining the ability to overcome friction when needed.
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
Enhances drill string movement by reducing friction and freeing stuck tools without damaging the string, ensuring unimpeded fluid flow and controlled oscillations or jarring actions when needed, improving operational efficiency and safety.
Implementation Method 1
a fluid flow control valve movable between an open and a closed position configured to modulate flow of a fluid through the passageway
Implementation Method 2
oscillation frequency to reduce friction
Implementation Method 3
jarring effect to free stuck tools
Implementation Method 4
jarring action
Data Source
AI summary
A downhole tool configured for inclusion in a drill string, typically as part of a bottom hole assembly. The downhole tool configured to improve passage of the drill string through a borehole. Additionally, the downhole tool is suitable for use in a method for improving passage of a drill string through a borehole.