Top Mounted Choke for Percussion Tool Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional percussion tools used in downhole drilling face challenges in controlling air flow efficiently, leading to excessive drilling time and operational costs due to the cumbersome process of accessing and replacing the choke, which is typically located deep inside the tool and requires disassembly.
Innovation Solution
The design relocates the check valve downstream of the choke, allowing for quick replacement or maintenance without disassembling the percussion tool, enabling easier access to the choke through the sub passage, thereby simplifying the process of adjusting or replacing it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the choke is located deep inside the percussion tool, then the air flow control is effective, but the maintenance and replacement require disassembly of the tool
Solution Approach 1:
The percussion tool is divided into separate functional modules, with the choke positioned in a accessible location that can be independently accessed through the sub passage. This segmentation allows the choke to be maintained or replaced without disassembling the entire tool, resolving the contradiction between effective air flow control and ease of repair.
2Loss of time
If the choke is relocated to be accessible without disassembly, then the maintenance time is reduced, but the internal air flow path design becomes more complex
Solution Approach 1:
A sub passage is introduced as an intermediary access route that allows the choke to be reached without disassembling the main tool body. This intermediary passage simplifies the maintenance process while keeping the internal air flow path design relatively simple, as the sub passage is a straightforward structural addition rather than a complex redesign.
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
This solution reduces operational costs and drilling time by allowing for rapid adjustment or replacement of the choke without disassembling the percussion tool, enhancing the tool's efficiency and usability in controlling air flow for optimal drilling performance.
Implementation Method 1
a check valve positioned within the bit and allowing flow from the mandrel passageway to the outside environment
Implementation Method 2
A choke is commonly used to control the amount of air directed to the piston
Implementation Method 3
a piston that is forced upwardly within the housing and delivers an impact blow to the top surface of the bit
Data Source
AI summary
A system and method of fabricating a percussion tool that includes a choke valve that is replaceable and/or maintainable without disassembly of the percussion tool. The flow tube includes inner and outer walls and at least one opening formed in the outer wall. The inner wall extends from a top end of the flow tube to a bottom end of the flow tube and defines a central channel therein. The outer wall extends from the top end towards the bottom end, surrounds a portion of the inner wall, and defines an outer channel with the inner wall. The choke is positioned at the top end over the central channel and regulate a fluid flow therethrough. A check valve is positioned in fluid communication with the choke.