Articulated Laser Drilling Tool for Formation Stimulation
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Solution Overview
Problem
Conventional wellbore stimulation methods, such as shaped charges and hydraulic fracturing, cause damage to formations, lack control over geometry and direction, and pose environmental and safety concerns, while existing laser technologies face limitations in placement and maneuverability for effective downhole use.
Innovation Solution
A high-power laser tool with an articulated robotic arm and optical transmission media, capable of drilling, perforating, and characterizing formations using high-definition acoustic imaging and orientation nozzles, allowing for precise control and non-damaging stimulation with real-time feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If shaped charges are used to perforate the casing and formation, then perforation can be achieved, but the high velocity impact crushes the rock formation and produces fine particles that plug the pore throat, reducing permeability and production
Solution Approach 1:
The patent replaces the mechanical impact system (shaped charge) with a thermal system (high power laser). The laser drills through the casing and formation by heating and vaporizing material, eliminating the crushing impact that causes formation damage. This substitution of mechanical energy for thermal energy resolves the contradiction between achieving perforation and avoiding formation damage.
Solution Approach 2:
The patent changes the fundamental parameter of energy delivery from high-velocity mechanical impact to controlled thermal energy input. By using laser energy with adjustable power and duration, the system can penetrate the formation without the crushing effects of shaped charges, thereby maintaining pore throat openness and permeability.
2Adaptability or versatility
If hydraulic fracturing is used to create fractures in the formation, then a network between the formation and wellbore can be created, but the high pressure water can be damaging to the formation and there are environmental concerns
Solution Approach 1:
The patent replaces the hydraulic fracturing system (high pressure fluid injection) with a laser-based system. The laser creates controlled channels and cavities through thermal energy rather than mechanical pressure, eliminating the need for large volumes of water and chemical additives, thereby reducing environmental impact and formation damage from fluid injection.
Solution Approach 2:
The patent extracts the harmful element (large volumes of water and chemical additives used in hydraulic fracturing) from the stimulation process. By using laser energy alone to create the fracture network, the system eliminates the need for millions of gallons of water and chemical components, resolving the environmental and formation damage concerns.
3Ease of manufacture
If conventional mechanical drilling is used to drill holes in the formation, then drilling can be performed, but it is difficult to steer the drilling assembly with greater accuracy and drilling through hard formation is difficult, slow, and expensive
Solution Approach 1:
The patent replaces conventional mechanical drilling (rotating bit with mechanical force) with a laser drilling system. The laser beam can be precisely directed and steered using optical systems and articulated arms, providing superior steering accuracy. The laser energy efficiently drills through hard formations by vaporizing material, dramatically increasing drilling speed and reducing costs compared to mechanical drilling.
Solution Approach 2:
The patent employs a dynamic laser drilling system with an articulated arm that can change the drilling direction in real-time. Unlike rigid mechanical drilling systems, the laser system can be dynamically repositioned and redirected using optical steering mechanisms, providing greater flexibility and steering accuracy during the drilling process.
4Power
If existing laser technologies are used for downhole stimulation, then some drilling capability is achieved, but there are limitations regarding the placement and maneuverability of the laser tool for effective downhole use
Solution Approach 1:
The patent segments the laser tool into modular components, including a laser source, an articulated arm with multiple joints, and a drilling head. This segmentation allows the tool to be lowered through the wellbore in a compact configuration and then deployed with full maneuverability at the target location, resolving the contradiction between power delivery and ease of placement.
Solution Approach 2:
The patent employs a dynamic articulated arm mechanism that allows the laser tool to maneuver into various positions and orientations within the wellbore. The articulated joints enable the tool to navigate around obstacles and reach difficult-to-access formation areas, significantly improving placement and maneuverability compared to rigid existing laser systems.
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
Enables efficient, controlled drilling and stimulation with improved formation characterization, reducing damage and environmental impact, and enhancing hydrocarbon production by penetrating any direction and rock strength with precise navigation and imaging.
Implementation Method 1
because a laser provides thermal input, it will break the bonds and cementation between particles and simply push them out of the way
Implementation Method 2
a laser provides thermal input
Data Source
Figure 1
Figure 2~3C
Figure 4~5
AI summary
This application relates to systems and methods for stimulating hydrocarbon bearing formations using a downhole laser tool.