Drilling Assembly with Resilient Cutting Head and Disc Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drilling technologies for removing obstacles in petroleum wells, such as valves and top caps, face issues like swarf generation, drill bit damage, improper hole alignment, and the risk of metal discs dropping into the well, leading to costly and complex operations.
Innovation Solution
A drilling assembly comprising a drill bit assembly, a cutting assembly with a hole saw, and a rotatable drive assembly, where the cutting assembly is resiliently displaceable relative to the drill bit, allowing for controlled weight transfer and a membrane system to secure the cut-out disc within the assembly, preventing it from falling back into the well.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a drill bit is used to drill away the obstacle, then the drilling operation is fast, but swarf is generated which may harm the operation of the well
Solution Approach 1:
The drilling operation is divided into two stages: first drilling a central hole with a drill bit, then removing the obstacle material with a hole saw. This segmentation allows the drill bit to create a guide hole quickly while the hole saw removes material cleaner with less swarf generation.
Solution Approach 2:
A hole saw is introduced as an intermediary tool between the drill bit and the obstacle removal. The hole saw cuts away the obstacle material more cleanly than a drill bit, reducing swarf generation while maintaining drilling efficiency.
2Device complexity
If a drill bit without lateral support is used, then the drilling operation is simple, but the hole may not be aligned with the center line and the drilling operation may be damaged
Solution Approach 1:
The drilling function is segmented between a drill bit that creates the initial hole and a hole saw that completes the removal. The drill bit can be simpler while the hole saw provides the lateral support and precise alignment needed for proper hole formation.
Solution Approach 2:
The hole saw acts as an intermediary that provides lateral support during the drilling process, ensuring the hole is aligned with the center line while allowing the drill bit to remain structurally simple.
3Productivity
If a hole saw is used to cut away the obstacle, then the obstacle is removed faster with less energy, but a metal disc is created that may drop into the well
Solution Approach 1:
A catcher assembly is introduced as an intermediary component to intercept and retain the metal disc created during hole saw operation. The catcher prevents the disc from dropping into the well while allowing the hole saw to continue cutting efficiently.
Solution Approach 2:
The metal disc created during obstacle removal is recovered by the catcher assembly rather than being discarded or lost. The catcher retains the disc and allows it to be removed from the well along with the drilling assembly.
4Productivity
If the weight on the drill bit is large, then the drilling operation is efficient, but the drill bit may break off
Solution Approach 1:
The weight application is made dynamic through a resilient connection that allows the drill bit to move independently. This dynamic system absorbs shock and prevents excessive weight from breaking the drill bit while maintaining sufficient drilling efficiency.
Solution Approach 2:
A resilient connection is provided beforehand to cushion and absorb the impact of weight application on the drill bit. This protective mechanism prevents the drill bit from breaking under excessive weight while maintaining drilling efficiency.
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 enables efficient and safe drilling operations by minimizing swarf generation, ensuring proper hole alignment, and securely retrieving discs, thus reducing operational costs and complications.
Implementation Method 1
a spring resiliently connected to the drill bit assembly and the cutting assembly
Implementation Method 2
a membrane within the tubular body, the membrane dividing an interior of the tubular body in an inner compartment and a receiving compartment
Data Source
AI summary
A drilling assembly for making a passage in an object within a petroleum well. The drilling assembly comprises a drill bit assembly, a cutting assembly, and both assemblies are fastened to a rotatable drive assembly. The drill bit assembly comprises a drill bit. The cutting assembly comprises a hole saw assembly. The cutting assembly is resiliently displaceable to the drill bit assembly. The drilling assembly comprises a displaceable membrane within the tubular body. The membrane divides an interior of the tubular body in a receiving compartment and an inner compartment.