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Key Features of the Hybrid Drill Bit

1. Dual Cutting Structures:

• Combines a cone cutting structure with a PDC fixed blade cutting structure.

• Leverages the advantages of both cone bits and PDC bits to enhance rock-breaking efficiency, particularly in challenging formations.

2. Composite Cutting Mechanism:

• The cone structure pre-crushes the well bottom, forming broken tooth pits.

• The PDC structure utilizes these pits to scrape and break the rock layers further, achieving a dual rock-breaking effect.

3. Performance Advantages:

• Soft Formations: Faster drilling than cone drills.

• Hard Formations: More aggressive than PDC bits.

• Interbedded Formations: Greater durability, reduced stickiness, and consistent torque management for smoother drilling transitions.

4. Improved Efficiency:

• Increases mechanical drilling speed compared to cone bits.

• Requires less bit weight and reduces bit rebound, enhancing operational control.

5. Enhanced Stability and Directional Control:

• Better vertical control and improved convolution rate in curve sections.

• Strong capabilities for horizontal and directional drilling, simplifying torque management and maintaining steady drilling in various formations.

Typical Applications

1. Hard and Heterogeneous Formations:

• Dense shale, gravel-bearing formations, bedrock, and other tough-to-penetrate strata.

2. Difficult-to-Drill Formations:

• Low drillability zones such as the Xujiahe and Zhenzhuchong formations in Sichuan, where PDC or cone drills struggle to achieve high penetration rates.

This reorganization highlights the hybrid bit's technical features and performance benefits while clearly outlining its application scenarios for various challenging formations.