Drilling Bit Directional Control via Rear Support Element
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Solution Overview
Problem
Existing methods for controlling the direction of drilling devices are inadequate for drilling in hard ground, as they require hydraulic or electric systems and are not effective for creating angles in rock formations, and they often require larger hole diameters and complex setups.
Innovation Solution
A method that adjusts the position of the rear part of the hammering device or drill arm relative to the center line using support elements within the casing tube, allowing for directional control of the drilling bit and percussion hammer without external power units or cabling, by utilizing axial and rotational movements of the drill rod and casing tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hydraulic or electric power units are used to control the direction of the drilling device, then the directional control capability is improved, but the device complexity and requirement for external power supply increases
Solution Approach 1:
The patent extracts and removes the complex hydraulic or electric power supply systems from the drilling device. Instead of using external power units, the invention utilizes the kinetic energy and momentum of the drilling bit itself to achieve directional control through simple mechanical support elements that can be easily positioned within the drill rod.
Solution Approach 2:
The drilling device performs its own directional control without external assistance. The support elements positioned inside the drill rod enable the bit to change direction by utilizing the existing drilling motion and forces, making the system self-sufficient and eliminating the need for separate power supply systems.
2Ease of operation
If the foremost cylinder part is turned to control drilling direction, then the directional control is achieved, but it requires a ground that gives in enough and a hole with clearly larger diameter
Solution Approach 1:
Instead of turning the foremost cylinder part to control direction, the invention inverts the approach by positioning support elements inside the drill rod that guide the bit's natural drilling motion. This allows directional control without requiring the ground to give way or the hole to be larger than necessary for the final application.
Solution Approach 2:
The support elements are positioned in advance within the drill rod before drilling begins. This preliminary positioning enables the bit to follow the desired trajectory from the start, eliminating the need to create an oversized hole that would accommodate the turning mechanism.
3Ease of operation
If multiple successive adjustable support elements are used to move the drill rod sideways, then the directional control is achieved, but the device complexity and number of components increases
Solution Approach 1:
The invention extracts and eliminates the need for multiple successive adjustable support elements. Instead, a single support element positioned strategically inside the drill rod is sufficient to control the drilling direction by guiding the bit's motion.
Solution Approach 2:
The single support element performs multiple functions: it guides the drilling direction, supports the drill rod, and enables angular deviations from the vertical axis. This multi-functional design replaces the need for multiple specialized components.
Data Source
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AI summary
Method for controlling the direction of a drilling device which drills a hole into a ground wherein a hammering and rotatable bit (3) is used as the drilling bit and the device comprises coupled with the bit (3) a hammering device (2) behind the bit (3) and a drill arm which is potentially related to it wherein the rear part (15) of the hammering device or the drill arm locates in the drilled hole or inside a casing tube (1) which covers the drilled hole in a free space so that there is space for the mentioned rear part (15) to move in the direction of the radius of the drilled hole and that the location of the bh (3) in the ground during the drilling is observed on the grounds of the data received from the position sensors which indicate the location of the bit (3), characterized in that in the method the direction of the drilling is steered by adjusting only the position of the mentioned rear part (15) in relation to the centre line (C) of the drilling by organizing a support, which is deviated from the centre line (C) or located on the centre line (C), for the mentioned rear part (15) with the help of a support element (5, 5 ', 7) which is located in the drilled hole or at the inner surface of the casing tube (I) which support is adjusted at the feed end of the drilling device and wherein a direction angle (a) is formed only for the bit (3) and hammering device in relation to the mentioned centre line (C).