Downhole Pulse Generator Removable Agitator Assembly
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Solution Overview
Problem
Conventional downhole pulse generating devices hinder fishing and through-bore operations below the device and are difficult to remove without disconnecting substantial portions of the drill string, limiting their operational flexibility.
Innovation Solution
A downhole tool with a removable agitator assembly that includes a rotor and stator, allowing for the decoupling of the agitator components to facilitate through-bore operations and enable retrieval without removing the entire device from the wellbore, utilizing a latch mechanism or other releasable connections for easy engagement and disengagement with fishing tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pulse generating device is made as a single integrated unit, then the device structure is simple and reliable, but the device cannot be removed or accessed below without removing substantial portions of the drill string
Solution Approach 1:
The downhole tool is divided into multiple separable components: a housing, an agitator assembly, and a removable component. The removable component can be detached from the housing to open the longitudinal bore, allowing fishing or through-bore operations below the device without removing the entire tool from the drill string.
2Adaptability or versatility
If the longitudinal bore is kept open for through-bore operations, then fishing activities can be performed below the device, but the agitator assembly cannot function to generate pressure pulses
Solution Approach 1:
The tool configuration is made dynamic and adjustable. The removable component can be selectively removed to enable through-bore operations or reinstalled to restore pressure pulse generation capability. This allows the system to adapt to different operational requirements at different times.
3Volume of moving object
If the agitator assembly is made compact to reduce drill string displacement, then the device size is minimized, but the agitator components cannot be easily separated for through-bore operations
Solution Approach 1:
The agitator assembly is segmented into the housing and a removable component. This segmentation allows the compact overall device size while enabling easy separation of components when through-bore operations are required, resolving the contradiction between compactness and ease of separation.
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 efficient fishing and through-bore activities below the pulse generation device by allowing selective removal and reinstallation of the agitator components, thereby extending the operational range of drilling assemblies and reducing the risk of drill string sticking.
Implementation Method 1
a rotor that is rotated by a fluid moving through the housing
Implementation Method 2
create fluctuations in fluid pressure that create vibrations in the drill string
Data Source
Figure 1~2
Figure 3~3A
Figure 4
AI summary
A downhole tool comprises a housing having a longitudinal bore and an agitator assembly disposed within the longitudinal bore of the housing. A removable component is disposed within the longitudinal bore and can be removed from the housing so as to at least partially open the longitudinal bore.