Vibration Impact Rock-Breaking Experimental Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drilling technologies face challenges in efficiently breaking deep hard rocks, particularly due to the lack of experimental research on rock breaking by high-frequency vibration impact, which hinders theoretical guidance for deep well drilling.
Innovation Solution
An experimental apparatus for rock-breaking through vibration impact is developed, comprising a confining pressure loading assembly, a drill bit, a drill rod, a drilling fluid circulation assembly, a rotary impact assembly, and an axial impact assembly, which simulates formation pressure, fluid circulation, and high-frequency vibration impacts to study rock breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional drilling methods are used for deep hard rocks, then drilling can proceed with simple equipment, but drilling efficiency is low and rock breaking difficulty increases with depth
Solution Approach 1:
The drilling system is segmented into independent functional modules: axial vibration generation unit, rotary motion unit, confining pressure loading unit, and drilling fluid circulation unit. Each module can be independently controlled and optimized, allowing complex vibration-impact drilling functions to be achieved through coordinated simple components rather than a monolithic complex system.
Solution Approach 2:
The system transitions from static conventional drilling to dynamic vibration-impact drilling by introducing high-frequency axial vibration through the servo actuator. The drill bit alternates between impact and withdrawal phases, creating dynamic loading conditions that significantly improve rock breaking efficiency compared to static pressing.
2Productivity
If high-frequency vibration impact is applied to break hard rocks, then rock breaking efficiency improves, but experimental research capability is insufficient without proper testing apparatus
Solution Approach 1:
The apparatus creates a scaled-down experimental model of actual deep well drilling conditions using core samples that replicate formation rock properties. The confining pressure loading assembly reproduces in-situ stress states, allowing reliable theoretical research on vibration-impact rock breaking without requiring full-scale field experiments.
Solution Approach 2:
The experimental apparatus integrates multiple functions into a single system: it can apply confining pressure in multiple directions, generate high-frequency axial vibration, provide rotary motion, and circulate drilling fluid. This multi-functional design enables comprehensive simulation of actual drilling conditions, providing reliable theoretical guidance for various deep well drilling scenarios.
3Measurement precision
If confining pressure is applied to simulate formation conditions, then experimental accuracy improves, but system complexity increases due to multiple loading directions
Solution Approach 1:
The confining pressure loading assembly uses hydraulic cylinders to apply controlled pressure in three perpendicular directions to the core sample. The hydraulic system provides precise pressure control and uniform distribution, achieving high experimental accuracy for simulating formation conditions while maintaining manageable system complexity through standardized hydraulic components.
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 effectively simulates the conditions of deep well drilling, allowing for the study of vibration impact on rock breakage and providing theoretical guidance for improving drilling efficiency in deep hard rock formations.
Implementation Method 1
The confining pressure loading assembly is configured to apply pressures to the core sample located in the core cavity in three directions perpendicular to each other
Implementation Method 2
The hydraulic rotary motor is capable of applying a torque in a first direction to the drill rod
Implementation Method 3
The hydraulic swing motor is capable of alternately applying an instantaneous torque in the first direction and an instantaneous torque in a second direction to the drill rod
Implementation Method 4
The first hydraulic cylinder is capable of applying a thrusting force in a third direction to the drill rod
Implementation Method 5
The servo linear actuator is capable of alternately applying a thrusting force in the third direction and a tensile force in a fourth direction to the drill rod
Implementation Method 6
The mud pump, the drilling fluid outlet, the drill rod, the drill bit, the core cavity, the liquid outlet, the drilling fluid inlet and the mud pump are in fluid communication in sequence to form a mud circulation channel
Implementation Method 7
The heating element for heating the core sample in the core cavity
Data Source
AI summary
An experimental apparatus for rock-breaking through vibration impact, including a confining pressure loading assembly, a drill bit, a drill rod, a drilling fluid circulation assembly, a rotary impact assembly and an axial impact assembly. The confining pressure loading assembly is configured to apply pressures to a core sample located in a core cavity in three directions perpendicular to each other. The drill bit is capable of inserting into the core cavity to drill the core sample. The drilling fluid circulation assembly includes a drilling fluid inlet, a drilling fluid outlet and a mud pump connected therebetween. The rotary impact assembly includes a hydraulic rotary motor and a hydraulic swing motor connected to the drill rod, respectively. The axial impact assembly includes a first hydraulic cylinder, and a servo linear actuator connected to the first hydraulic cylinder and the drill rod.