Fluid-Driven Lateral Borehole Drilling System
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Solution Overview
Problem
Conventional methods for drilling lateral boreholes from a main borehole are costly, time-consuming, and complex, especially in thin hydrocarbon reservoirs, requiring multiple operations and sophisticated techniques, and are limited by the need for electrical power via wireline cables and the use of multiple tools.
Innovation Solution
A drilling system that uses fluid flow as a power source, incorporating a tubular conduit, a drilling assembly with a power conversion unit, a drilling unit, and an anchor unit to drill lateral boreholes and install liners, all within a single tool, allowing for efficient drilling and completion with reduced operational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional drilling methods with multiple tools and electrical power via wireline are used, then drilling operations can be performed, but operational complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple drilling functions (drilling, power supply, fluid circulation) into a single integrated tool assembly. The drilling tool includes both the drilling mechanism and power conversion components, eliminating the need for separate electrical power cables and multiple specialized tools, thereby reducing operational complexity while maintaining full drilling capability
Solution Approach 2:
The drilling tool is designed as a multi-functional device that can perform drilling operations, convert fluid energy to mechanical power, and circulate drilling fluid all within a single tool. This universal tool replaces the need for multiple specialized tools and external electrical power sources, directly addressing the contradiction between operational simplicity and device complexity
2Reliability
If multiple operations and sophisticated techniques are used for drainhole completion, then drilling can be performed in challenging reservoirs, but time and cost increase
Solution Approach 1:
The system performs preliminary actions by establishing fluid circulation and power conversion capabilities before drilling begins. The tool is pre-equipped with power conversion units that convert fluid energy to mechanical power, allowing immediate drilling operations without waiting for external power connections or multiple setup operations, thereby reducing completion time while maintaining reliability in thin reservoirs
Solution Approach 2:
The drilling operation maintains continuous fluid circulation and power supply throughout the drilling process. The fluid-driven power conversion system operates continuously, eliminating interruptions associated with multiple operations and technique changes, thus reducing completion time while ensuring reliable drilling performance in challenging thin reservoir conditions
3Power
If electrical power via wireline cables is used, then drilling operations can be powered, but operational complexity and cost increase
Solution Approach 1:
The patent replaces the electrical power system (wireline cables and electrical motors) with a mechanical/fluid-based power system. Fluid pressure energy is converted to mechanical power through power conversion units (such as hydraulic motors or turbines) that drive the drilling mechanism, eliminating the need for complex electrical power transmission while providing sufficient drilling power
Solution Approach 2:
The system uses hydraulic principles to convert fluid pressure into mechanical power for drilling. Power conversion units within the tool utilize hydraulic motors or turbines that convert the kinetic energy of circulating fluid into rotational mechanical power, providing an alternative to electrical power systems and reducing operational complexity and cost
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 drilling of lateral boreholes with desired dimensions, installation of liners, and sealing, reducing operational costs and complexity by utilizing fluid flow for power, allowing for single-trip operations and improved oil recovery in challenging reservoirs.
Implementation Method 1
a power conversion unit, through which the fluid flows and which operates to provide a downhole power output
Data Source
AI summary
A drilling system for drilling a lateral borehole from a main borehole comprises a tubular conduit through which a fluid can be pumped, and a drilling assembly connected to the tubular conduit so as to receive fluid pumped therethrough. The drilling assembly comprises a power conversion unit, through which the fluid flows and which operates to provide a downhole power output; a drilling unit including a drilling apparatus powered by the output of the power conversion unit and operable to drill a lateral borehole into the formation surrounding the main borehole, and a liner unit for storing one or more liners for installation into the lateral borehole; and an anchor unit operable to anchor the drilling assembly in the main borehole when the drilling unit operates to drill the lateral borehole. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the drilling assembly in the main borehole at a location of interest using the tubular conveyance; anchoring the drilling assembly in the main borehole using the anchor unit; operating the drilling unit to drill a lateral borehole from the main borehole; retrieving the drilling unit from the lateral borehole; releasing the anchor unit; and moving the drilling assembly to another location.