Rotatable Downhole Perforating Gun Tube
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Solution Overview
Problem
Conventional perforating gun systems for oil and gas wells require complex electrical connections, which are time-consuming to install and prone to failure due to the need for multiple wires.
Innovation Solution
A rotatable perforating gun system where weights are used to rotate the gun tube, allowing the explosive charges to point in various directions, and incorporating a bearing housing for rotation relative to the end fittings, eliminating the need for complex electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple wires are used to electrically connect guns in a string, then electrical connectivity is maintained, but installation time increases and reliability decreases
Solution Approach 1:
The patent removes the complex electrical connection system (multiple wires) from the gun string assembly. Each gun is made electrically isolated yet functional through the removal of inter-gun wiring, eliminating installation time and potential failure points while maintaining electrical connectivity through an alternative mechanism not requiring multiple wires between guns.
Solution Approach 2:
The gun string is segmented into electrically isolated individual guns, each capable of independent operation. This segmentation eliminates the need for continuous electrical connections between guns, reducing installation complexity and potential failure points while maintaining the ability to fire each gun independently.
2Reliability
If guns are electrically connected with multiple wires, then electrical connectivity is achieved, but the system complexity increases
Solution Approach 1:
The patent extracts and removes the complex multi-wire electrical connection system from the gun assembly. By eliminating these connections entirely and replacing them with a simpler electrical isolation mechanism, the system complexity is reduced while maintaining or improving reliability through fewer potential failure points.
3Ease of manufacture
If conventional fixed orientation guns are used, then manufacturing is simpler, but operational versatility decreases
Solution Approach 1:
The patent introduces dynamic orientability to the gun system through rotatable mechanisms that allow the charge orientation to be adjusted. This enables the gun to adapt to different wellbore configurations and perforation requirements while maintaining manufacturing simplicity through standardized rotatable components.
Solution Approach 2:
The patent adds rotational freedom as a new dimension to the gun design, allowing charges to point in various directions. This dimensional addition provides operational versatility for different perforation patterns without significantly complicating the manufacturing process, as the rotatable mechanism uses standard mechanical components.
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
The system simplifies the installation process, reduces the risk of electrical failures, and allows for more precise orientation of the explosive charges, enhancing the efficiency and reliability of perforating operations.
Implementation Method 1
Gravity acts on the weights, which causes the gun tube to rotate around its longitudinal axis when the gun is horizontally oriented
Implementation Method 2
A bulkhead is disposed proximate to a first end of a gun carrier and comprising a central throughbore, a sealing element disposed within a groove formed on an outer surface of the bulkhead, a feedthrough disposed within the throughbore of the bulkhead
Data Source
AI summary
A downhole perforating gun system provides wireless electrical communication between an inner body conductor, a switch, a detonator, and a feedthrough, and further comprising a weight module and a bearing assembly wherein the weight module is rotatable by a weight via a bearing assembly based on gravity acting on one or more of the weights.