Underground Drilling Rig Erection via Crown Bearing Relocation
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Solution Overview
Problem
Existing drilling rig erection methods require significant above-ground space and structural measures, which are not feasible for underground drilling operations. Additionally, conventional methods rely on drilling masts to absorb forces, which can be cumbersome and limit the length of drill pipe hoists.
Innovation Solution
The method involves raising a crown bearing from the production tunnel into the mast shaft and vertically fixing it at a distance corresponding to at least the length of one drill pipe. This allows for the dissipation of forces into the mast shaft wall or through suspension, eliminating the need for a drilling mast and reducing the setback area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional drilling rig erection methods are used, then drilling operations can be performed, but significant above-ground space and structural measures are required
Solution Approach 1:
The invention relocates the drilling rig from above-ground operation to underground operation within a production tunnel and mast shaft structure. The crown bearing is raised into the mast shaft and vertically fixed at a distance corresponding to at least the length of one drill pipe, enabling drilling operations to occur in the underground dimension rather than requiring above-ground space
Solution Approach 2:
The invention extracts and eliminates the drilling mast component from the system. By raising the crown bearing into the mast shaft and fixing it vertically at the appropriate distance, the function of the drilling mast is rendered unnecessary, thereby removing this structural element and its associated above-ground space requirements
2Stability of the object's composition
If drilling masts are used to absorb forces, then structural stability is achieved, but device complexity and setback area increase
Solution Approach 1:
The invention removes the drilling mast from the system entirely. The crown bearing is raised into the mast shaft and vertically fixed at a distance corresponding to at least the length of one drill pipe, allowing forces to be dissipated into the mast shaft wall or through suspension, thereby eliminating the need for separate drilling mast structures
Solution Approach 2:
The mast shaft structure assumes multiple functions: it provides the vertical shaft for raising the crown bearing, serves as the structural element for dissipating forces, and eliminates the need for separate drilling masts. This multi-functionality reduces overall device complexity while maintaining structural stability
Data Source
AI summary
The Invention relates to an underground drilling rig (10) and a method for its erection, wherein the method, in a special embodiment, comprises erecting a mast structure (20) of the drilling rig (10) extending from a horizontal tunnel (production tunnel) into a vertical mast shaft (14) and by means of an erecting structure (50), wherein the mast structure (20) comprises a plurality of mast segments (60) connected to one another or connectable to one another.