Non-Planar Cutting Element Backing Support for Drilling
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Solution Overview
Problem
Conventional drill bits face inefficiencies in cutting through formations due to the limited geometry and orientation of cutting elements, which affect the aggressiveness and effectiveness of the cutting process.
Innovation Solution
The development of non-planar cutting elements with a forward rake angle and a support structure around the cutting tool, featuring a grip region and a cutting end with a radius of curvature, enhances the cutting efficiency by altering the angle of engagement with the formation and distributing stress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional planar cutting elements are used, then the structure is simple and easy to manufacture, but the cutting aggressiveness and effectiveness are limited
Solution Approach 1:
The cutting element is designed with a non-planar, curved cutting surface that transitions from the grip region to the cutting end. This curvature allows the cutting element to engage the formation more aggressively and effectively, improving cutting performance while maintaining a relatively simple cylindrical grip region for easy manufacturing
Solution Approach 2:
The invention changes the geometric parameters of the cutting element by introducing a forward rake angle and non-planar cutting surface. These parameter changes enable the cutting element to cut more effectively through the formation, directly addressing the limited cutting aggressiveness of conventional planar elements
2Productivity
If cutting elements are oriented at conventional angles, then the mounting is simple, but the aggressiveness of the cutting process is limited
Solution Approach 1:
The non-planar cutting surface is configured with specific curvature radii (Rx and Ry) that determine the orientation and aggressiveness of the cutting action. This curved geometry automatically orients the cutting edge at optimal angles relative to the formation, achieving high cutting aggressiveness while simplifying the mounting process compared to conventional angled elements
3Reliability
If cutting elements have limited stress distribution, then the design is simple, but the durability of the cutting tool is reduced
Solution Approach 1:
The non-planar cutting surface with its curved geometry distributes stress more effectively across the cutting element during engagement with the formation. This stress distribution mechanism is inherent in the curved surface design itself, not requiring additional complex components, thereby improving durability without significantly increasing device complexity
Data Source
AI summary
A cutting tool has a tool body and at least one non-planar cutting element oriented at a forward rake angle on the top surface of the cutting tool. The at least one non-planar cutting element of the cutting tool has a grip region and a non-planar cutting end. A support of the cutting tool extends around at least a portion of a circumference of the grip region.