Modular Earth-Boring Tool With Removable Blade Assemblies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing earth-boring tools lack the ability to easily modify their aggressiveness in response to changing drilling conditions, requiring multiple drill bits for different formations and leading to inefficiencies and increased costs.
Innovation Solution
A modular earth-boring tool with fixed blades and removable blade assemblies, where the aggressiveness can be adjusted by exchanging removable blade assemblies, allowing for varying depth of cut and rate of penetration based on weight-on-bit, utilizing cutting elements with different aggressiveness and materials that deform under load to control the tool's aggressiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple drill bits are used for different formations, then the tool can adapt to various drilling conditions, but the device complexity and cost increase
Solution Approach 1:
The drill bit is designed with multiple blade assemblies that can be exchanged to perform different drilling functions. The body includes multiple blade receptacles that can accommodate different blade assemblies (first blade assembly with first cutting elements, second blade assembly with second cutting elements, third blade assembly with third cutting elements), allowing a single drill bit to adapt to various formation types and drilling conditions by simply replacing the blade assembly.
2Adaptability or versatility
If multiple drill bits are used for different formations, then the tool can adapt to various drilling conditions, but the loss of time for changing bits increases
Solution Approach 1:
The drill bit is segmented into a body and interchangeable blade assemblies. Each blade assembly (first blade assembly, second blade assembly, third blade assembly) can be independently removed and replaced at the drill bit location without requiring complete bit replacement. The body includes multiple blade receptacles with release mechanisms that enable quick exchange of blade assemblies, reducing non-productive time.
3Productivity
If cutting elements with different aggressiveness are used, then the rate of penetration can be optimized, but the manufacturing precision requirements increase
Solution Approach 1:
Different blade assemblies are designed with cutting elements having different aggressiveness characteristics tailored to specific formation types. The first blade assembly has first cutting elements optimized for certain formations, the second blade assembly has second cutting elements for other formations, and the third blade assembly has third cutting elements for yet other formations. Each blade assembly's cutting elements are positioned and configured with local quality optimized for its intended application.
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 flexible and efficient drilling by allowing the aggressiveness of the tool to be adjusted in real-time, reducing the need for multiple drill bits, improving rate of penetration, and enhancing operational flexibility across various formations.
Implementation Method 1
utilizing cutting elements with different aggressiveness and materials that deform under load to control the tool's aggressiveness
Data Source
AI summary
An earth-boring tool includes a body, a plurality of fixed blades, a first plurality of cutting elements secured to the plurality of fixed blades, a plurality of removable blade assemblies removably coupled to the body, and a second plurality of cutting elements secured to the plurality of removable blade assemblies, each cutting element of the second plurality of cutting elements exhibiting an aggressiveness that is less than an aggressiveness of each cutting element of the first plurality of cutting elements. A method of forming an earth-boring tool includes forming a body and a plurality of fixed blades extending from the body, securing a first plurality of cutting elements to the plurality of fixed blades, removably coupling at least one removable blade assembly to the body, and securing a second plurality of cutting elements to the at least one removable blade assembly.