Multi-Cutting-Edge Diamond Composites for Complex-Strata Drilling
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Solution Overview
Problem
Existing diamond composites in drill bits have uniform chamfers on cutting edges, making it difficult to adapt to the varying requirements of drilling in complex strata during oil and gas drilling operations.
Innovation Solution
A multi-cutting-edge diamond composite with a diamond composite layer featuring multiple segments of different chamfers on its circumferential edge, allowing for varied cutting edges with distinct attacking and impact resistance abilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If unitary chamfers are used on cutting edges, then manufacturing simplicity is maintained, but adaptability to different strata deteriorates
Solution Approach 1:
The circumferential edge of the diamond composite layer is divided into multiple segments with different chamfer types or parameters. Each segment can be independently designed with specific chamfer angles, widths, or profiles to match different stratum requirements, transforming a uniform structure into a segmented functional architecture that provides varied cutting characteristics around the circumference.
Solution Approach 2:
Different regions of the circumferential edge are assigned different chamfer properties (single-bevel, double-bevel, curved, different angles, different widths) to create localized functional zones. This allows the cutting edge to have spatially varying characteristics where specific segments optimize for attacking ability while others optimize for impact resistance, matching the heterogeneity of drilled strata.
2Adaptability or versatility
If multiple chamfer segments are added to provide varied cutting edges, then adaptability to complex strata improves, but manufacturing complexity increases
Solution Approach 1:
Multiple chamfer segments with different functional characteristics are integrated into a single diamond composite layer structure. The various chamfer types (single-bevel, double-bevel, curved) are combined in one component, allowing the drill bit to access multiple cutting modes without requiring separate replaceable elements, thus maintaining manufacturing efficiency while achieving functional diversity.
Solution Approach 2:
The diamond composite layer is designed to perform multiple functions through its multi-segmented chamfer configuration. A single composite layer provides both high-attacking capability segments and high impact-resistance segments, making the cutting element universally applicable to various strata types without requiring specialized components for different drilling conditions.
Data Source
AI summary
A multi-cutting-edge diamond composite includes a columnar hard alloy substrate and a diamond composite layer, the diamond composite layer being disposed at a top end of the hard alloy substrate, wherein a circumferential edge of a top end of the diamond composite layer is provided with at least two segments of different chamfers to form different cutting edges. By providing different chamfers on the circumferential edge of the top end of the diamond composite layer, multiple cutting edges are formed in the circumferential direction of an end face of the diamond composite, such that different edges of the same composite sheet have different attacking abilities and impact resistance abilities. Since the chamfers form various cutting edges with different properties, the same diamond composite can meet the requirement of drilling in different strata, and can enable a diamond drill bit to adapt to the requirement of drilling in complex strata.