Water Hammer Drilling Apparatus with Bubble Separation
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Solution Overview
Problem
Conventional directional drilling methods face challenges in controlling drilling direction, especially in weak or anisotropic ground conditions, and suffer from reduced excavating power due to increased water pressure at greater depths when using a water hammer unit.
Innovation Solution
A directional drilling apparatus with a water hammer unit that includes a rotary shaft coupled to a bit, a piston with an operating fluid discharge part, and an operating fluid evacuating portion to separate bubbles and maintain pressure, allowing for directional control and reduced interference from water pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a water hammer unit is used to increase hitting power for drilling, then drilling power is improved, but water pressure inside the bored hole increases which reduces excavating power of the bit
Solution Approach 1:
The patent extracts and removes water and bubbles from the bored hole using a water discharge device. This eliminates the harmful accumulation of water that reduces excavating power, allowing the bit to maintain effective contact with the ground without water interference during the drilling process
Solution Approach 2:
The patent introduces a vacuum generator as an intermediary device that creates negative pressure to extract water and bubbles from the bored hole. This mediator system manages the water pressure issue by actively removing water, thus preserving the excavating power of the bit while maintaining the water hammer unit's hitting power
2Measurement precision
If conventional drilling methods are used to control drilling direction, then direction control is achieved, but drilling speed is relatively low
Solution Approach 1:
The patent merges two drilling approaches by combining the water hammer unit (which provides high-speed drilling capability) with directional control mechanisms (guiding装置). This integration allows the system to achieve both high drilling speed and precise direction control, resolving the contradiction between speed and control accuracy
Solution Approach 2:
The patent creates a multi-functional drilling system where the water hammer unit serves both as a high-speed drilling device and as part of a directional control system. The guiding装置 and water discharge device add directional control and water management functions, making the system universally capable of both speed and precision requirements
3Power
If water is used as operating fluid in water hammer to provide high hitting power, then hitting power is improved, but direction control becomes difficult when drilling at inclination
Solution Approach 1:
The patent uses the guiding装置 as an intermediary mechanism that mediates between the water hammer unit and the drilled hole. This guiding system provides directional control by physically constraining and guiding the water hammer unit's movement, making direction control feasible even when drilling at inclined angles while preserving the high hitting power of the water hammer
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus enables precise directional drilling and maintains hitting power by separating bubbles and managing water pressure, improving flexibility and drilling accuracy.
Implementation Method 1
a water hammer using high pressure water
Implementation Method 2
an operating fluid evacuating portion to separate bubbles and maintain pressure
Data Source
AI summary
A directional drilling apparatus using a water hammer unit according to the present invention includes a hammer body in which a bit unit configured to perform boring work is installed to be movable upward and downward at an end portion of the hammer body, a piston slidably installed on the hammer body and including an operating fluid discharge part formed in a longitudinal direction, a drive unit installed between the hammer body and the piston to support an upper portion of the piston and configured to move the piston upward and downward using water supplied through a rod connected to the hammer body, a hammer unit including a rotary shaft coupled to a bit by a first coupling part so as to transmit a rotational force in a state in which the hammer unit passes through the piston installed on the hammer body and is moved upward or downward by the bit, and a mud motor unit coupled to the hammer body and configured to rotate the rotary shaft.