Coal Mine Directional Drill With Toolface Azimuth Control
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Solution Overview
Problem
Existing directional drills lack a special toolface azimuth adjustment device, making it impossible to measure and correct the initial value, leading to uncontrollable drilling tracks and low automation, which hinders efficient and safe directional drilling.
Innovation Solution
A coal mine intelligent directional drill equipped with a power head, angle adjuster, toolface azimuth detection and initialization system, and a hydraulic system, enabling precise toolface azimuth adjustment and automatic drill pipe handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If directional drills are used to achieve controllable drilling track and large drilling depth, then drilling precision and coverage range are improved, but automation degree is reduced and manual operations increase labor intensity
Solution Approach 1:
The directional drill system is divided into independent functional modules: power head assembly with azimuth adjustment mechanism, drill pipe storage system with automatic feeding, hydraulic control system, and data acquisition system. This segmentation allows each module to be optimized for its specific function while working together to achieve automated directional drilling, resolving the contradiction between specialized directional control and overall automation.
Solution Approach 2:
Manual mechanical operations for drill pipe handling, azimuth adjustment, and drilling control are replaced with automated hydraulic actuation and electronic control systems. The hydraulic system automatically adjusts the power head azimuth, feeds drill pipes, and controls drilling parameters based on pre-programmed trajectories, eliminating manual intervention while maintaining precise directional control.
2Productivity
If automatic drill pipe installation and removal system is used, then drilling efficiency is improved, but it is difficult to meet the needs of conveying drill pipes with large capacity and large size in directional drilling
Solution Approach 1:
The drill pipe storage system features a dynamic, multi-level rack structure that can be reconfigured to accommodate different drill pipe lengths, diameters, and quantities. The automatic feeding mechanism uses adaptive grippers and variable-speed conveyance that adjust to the specific dimensions and weight of the drill pipes being handled, allowing the system to efficiently handle both standard and large-capacity drill pipes required for directional drilling.
3Extent of automation
If existing automatic drills are used with rotary drilling principle, then automatic drilling function is achieved, but power head lacks automatic toolface azimuth adjustment function making drilling track unpredictable
Solution Approach 1:
The power head assembly incorporates a preliminary azimuth adjustment mechanism that pre-positions the drill bit orientation before drilling begins. The hydraulic actuation system pre-adjusts the toolface azimuth according to the planned drilling trajectory, ensuring the drill starts in the correct orientation and maintains predictable track control throughout the drilling process, combining automatic drilling with precise directional accuracy.
4Adaptability or versatility
If manual drill pipe installation and removal is used in directional drilling, then adaptability to different drill pipe sizes is maintained, but labor intensity is high and safety hazards exist
Solution Approach 1:
The automatic drill pipe handling system performs self-service operations by automatically gripping, lifting, transporting, and positioning drill pipes without human intervention. The system uses sensors to detect drill pipe characteristics and automatically adjusts handling parameters, eliminating manual labor while maintaining the flexibility to handle various drill pipe sizes and configurations required in directional drilling operations.
Data Source
AI summary
The present invention relates to a coal mine intelligent directional drill and its drilling method, belonging to the technical field of coal mine drills. It comprises a moving platform, machine frame, clamper, main manipulator, power head, drill pipe storage system, control system, and hydraulic system. The power head structure is improved by adding an angle adjuster with accurate angle adjustment, locking, and anti-rotation functions. The angle adjuster is positioned on the gearbox side opposite the main motor, connected via a driving shaft. The control system includes a toolface azimuth detection and initialization system that works with the angle adjuster. This solves prior issues such as the absence of specialized toolface azimuth adjustment devices, low precision, low track adjustment efficiency, and challenges in achieving automatic directional drilling in the prior art. The invention enhances precision and efficiency, enabling automated, intelligent directional drilling.